Triple-effect evaporation system device

Abstract

The utility model provides a triple-effect evaporation system device which comprises a first-effect heating evaporation device, a second-effect heating evaporation device and a triple-effect heating evaporation device, and the first-effect heating evaporation device, the second-effect heating evaporation device and the triple-effect heating evaporation device are respectively and independently provided with a discharging circulation pipeline; a discharge circulating pipeline of the triple-effect heating evaporation device is provided with a density monitoring assembly and a discharge port, the density monitoring assembly is arranged on one side, opposite to the discharge flowing direction, of the discharge port, the discharge port is connected with a discharge pipeline, and the discharge pipeline is provided with a discharge valve. According to the triple-effect evaporation system device, the density monitoring assembly is used for monitoring the discharging concentration, and the problems of material decomposition, material crystallization and the like caused by local over-concentration in the concentration process are avoided; entrainment is effectively prevented, product entrainment in the concentrated evaporation condensate is greatly reduced, and the evaporation condensate is effectively recycled.

Description

Technical Field

[0001] The utility model belongs to the field of chemical engineering devices, and particularly relates to a triple-effect evaporation system device. Background Art

[0002] Triple-effect concentrating evaporators are widely used in the pharmaceutical, chemical, food, and light industry. They usually adopt the working principle of external heating with tubular circulation. The secondary steam generated by the first evaporator serves as the heat source for the second evaporator, and the secondary steam generated by the second evaporator serves as the heat source for the third evaporator. This concentration method has the characteristics of short physical heating time, fast evaporation speed, large concentration ratio, and effectively maintaining the original efficiency of the material, with remarkable energy-saving effects. In existing triple-effect concentrators, there is no device for detecting the concentration from concentration to the discharge of concentrated liquid. CN219110847U uses a weighing module to weigh the material before and after concentration, so as to detect the concentration. Although this patent solves the problem of controlling the concentration at the end point of concentration, it cannot solve the problem of controlling the concentration during the concentration process. Especially for materials that are easy to crystallize and have poor stability, there is a risk of blocking equipment and pipelines and material deterioration. Therefore, a concentrator that can monitor the discharge concentration of materials in real time is needed.

[0003] In existing triple-effect concentration, during the concentration process, steam usually entrains some materials (i.e., entrainment of droplets). After concentration, some materials in the evaporation condensate will be discharged to the sewage tank along with the evaporation condensate, increasing the sewage treatment load. At the same time, the evaporation condensate cannot be recycled because it contains materials. Therefore, a triple-effect concentration system that can effectively solve the problem of entrainment of droplets is needed.

[0004] The raw steam condensate and evaporation condensate of triple-effect concentration have a certain amount of heat energy. The existing triple-effect concentration system does not recover this part of heat energy, resulting in a certain amount of energy waste. Therefore, a triple-effect system that can recover the heat energy of raw steam condensate and evaporation condensate is needed. Content of the Utility Model

[0005] To solve the technical problems existing in the prior art, the utility model provides a triple-effect evaporation system device. The triple-effect evaporation system device uses a density monitoring component to monitor the discharge concentration, avoiding problems such as material decomposition and material crystallization caused by local over-concentration during the concentration process; effectively preventing entrainment of droplets, greatly reducing the product entrainment in the evaporation condensate after concentration, and enabling the effective recycling of the evaporation condensate.

[0006] To achieve the above technical effects, the utility model adopts the following technical solutions:

[0007] The utility model provides a triple-effect evaporation system device. The system device includes a first-effect heating and evaporation device, a second-effect heating and evaporation device, and a third-effect heating and evaporation device. The first-effect heating and evaporation device, the second-effect heating and evaporation device, and the third-effect heating and evaporation device are respectively independently provided with a discharge circulation pipeline;

[0008] The discharge circulation pipeline of the triple-effect heating evaporation device is provided with a density monitoring component and a discharge port. The density monitoring component is arranged on one side of the discharge port against the discharge flow direction. The discharge port is connected to a discharge pipeline, and the discharge pipeline is provided with a discharge valve.

[0009] A first gas-liquid separation device is arranged on the connecting pipeline between the steam outlet of the first-effect heating evaporation device and the steam inlet of the second-effect heating evaporation device; a second gas-liquid separation device is arranged on the connecting pipeline between the steam outlet of the second-effect heating evaporation device and the steam inlet of the third-effect heating evaporation device; a third gas-liquid separation device is arranged on the steam recovery pipeline connected to the steam outlet of the third-effect heating evaporation device.

[0010] As a preferred technical solution of the present invention, the first gas-liquid separation device is internally provided with packing, and a raw liquid spraying component is arranged above the packing. The raw liquid spraying component is connected to the first-effect heating evaporation device through a raw liquid export pipeline.

[0011] The first gas-liquid separation device is provided with a steam inlet, and the steam inlet is arranged below the packing. The steam inlet of the first gas-liquid separation device is connected to the steam outlet of the first-effect heating evaporation device.

[0012] The top of the first gas-liquid separation device is provided with a steam outlet, and the steam outlet is connected to the steam inlet of the second-effect heating evaporation device.

[0013] The bottom of the first gas-liquid separation device is provided with a liquid outlet, and the liquid outlet is connected to the discharge circulation pipeline of the first-effect heating evaporation device.

[0014] As a preferred technical solution of the present invention, the second gas-liquid separation device is internally provided with packing, and a raw liquid spraying component is arranged above the packing. The raw liquid spraying component is connected to the second-effect heating evaporation device through a raw liquid export pipeline.

[0015] The second gas-liquid separation device is provided with a steam inlet, and the steam inlet is arranged below the packing. The steam inlet of the second gas-liquid separation device is connected to the steam outlet of the second-effect heating evaporation device.

[0016] The top of the second gas-liquid separation device is provided with a steam outlet, and the steam outlet is connected to the steam inlet of the third-effect heating evaporation device.

[0017] The bottom of the second gas-liquid separation device is provided with a liquid outlet, and the liquid outlet is connected to the discharge circulation pipeline of the second-effect heating evaporation device.

[0018] As a preferred technical solution of the present utility model, a filler is arranged inside the third gas-liquid separation device, and a raw liquid spraying component is arranged above the filler. The raw liquid spraying component is connected to the triple-effect heating evaporation device through a raw liquid outlet pipeline;

[0019] The third gas-liquid separation device is provided with a steam inlet, and the steam inlet is arranged below the filler. The steam inlet of the third gas-liquid separation device is connected to the steam outlet of the triple-effect heating evaporation device;

[0020] The top of the third gas-liquid separation device is provided with a steam outlet, and the steam outlet is connected to a steam recovery pipeline;

[0021] The bottom of the third gas-liquid separation device is provided with a liquid outlet, and the liquid outlet is connected to the discharge circulation pipeline of the triple-effect heating evaporation device.

[0022] As a preferred technical solution of the present utility model, the material inlet of the first-effect heating evaporation device is connected to the raw liquid feed pipeline.

[0023] As a preferred technical solution of the present utility model, a first heat exchange device and a second heat exchange device are sequentially arranged on the raw liquid feed pipeline.

[0024] As a preferred technical solution of the present utility model, the first-effect heating evaporation device is provided with a live steam condensate outlet, and the live steam condensate outlet is connected to the liquid inlet of the live steam condensate storage device.

[0025] As a preferred technical solution of the present utility model, the second-effect heating evaporation device and the third-effect heating evaporation device are respectively and independently provided with evaporation condensate outlets, and the evaporation condensate outlets are respectively and independently connected to the liquid inlets of the evaporation condensate storage device

[0026] As a preferred technical solution of the present utility model, the liquid outlet of the live steam condensate storage device is connected to the heat source inlet of the second heat exchange device.

[0027] As a preferred technical solution of the present utility model, the liquid outlet of the evaporation condensate storage device is connected to the heat source inlet of the first heat exchange device.

[0028] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0029] (1) The present utility model provides a triple-effect evaporation system device. The triple-effect evaporation system device uses a density monitoring component to monitor the discharge concentration, making the discharge concentration controllable and adjustable, and realizing uniform discharge; it can effectively prevent problems such as material decomposition and material crystallization caused by local over-concentration during the concentration process;

[0030] (2) The present utility model provides a triple-effect evaporation system device, which is provided with a gas-liquid separation device and cooperates with the spraying of the original liquid, effectively preventing entrainment of mist in the steam. The material entrained in the evaporated condensate after concentration can be reduced by more than 95%, and the evaporated condensate can be effectively recycled;

[0031] (3) The present utility model provides a triple-effect evaporation system device, which collects the evaporated condensate and steam condensate by providing a steam condensate storage device and an evaporated condensate storage device. Combining the setting of the heat exchanger, the heat of the evaporated condensate and steam condensate is recycled, saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of the triple-effect evaporation system device provided in Embodiment 1 of the present utility model;

[0033] Figure 2 is a schematic structural diagram of the first gas-liquid separation device, the second gas-liquid separation device and the third gas-liquid separation device provided in Embodiment 1 of the present utility model;

[0034] In the figure: E001 - first-effect heating evaporation device, E002 - second-effect heating evaporation device, E003 - third-effect heating evaporation device, SE001 - first gas-liquid separation device, SE002 - second gas-liquid separation device, SE003 - third gas-liquid separation device, HE001 - first heat exchange device, HE002 - second heat exchange device, V002 - raw steam condensate storage device, V003 - evaporated condensate storage device, V004 - temporary storage tank, E004 - third heat exchange device, P001 - P007 - liquid pumps.

[0035] The following further details the present utility model. However, the following examples are only simple examples of the present utility model and do not represent or limit the scope of the patent protection of the present utility model. The scope of protection of the present utility model is subject to the claims. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The technical solution of the present application will be further described below through specific embodiments.

[0037] The specific embodiment of the present utility model provides a triple-effect evaporation system device, and the system device includes a first-effect heating evaporation device, a second-effect heating evaporation device and a third-effect heating evaporation device, and the first-effect heating evaporation device, the second-effect heating evaporation device and the third-effect heating evaporation device are respectively independently provided with a discharge circulation pipeline;

[0038] The discharge circulation pipeline of the triple-effect heating evaporation device is provided with a density monitoring component and a discharge port. The density monitoring component is arranged on one side of the discharge port against the discharge flow direction. The discharge port is connected to a discharge pipeline, and the discharge pipeline is provided with a discharge valve.

[0039] A first gas-liquid separation device is arranged on the connecting pipeline between the steam outlet of the first-effect heating evaporation device and the steam inlet of the second-effect heating evaporation device; a second gas-liquid separation device is arranged on the connecting pipeline between the steam outlet of the second-effect heating evaporation device and the steam inlet of the third-effect heating evaporation device; a third gas-liquid separation device is arranged on the steam recovery pipeline connected to the steam outlet of the third-effect heating evaporation device.

[0040] In the present utility model, a density monitoring component is arranged on the discharge circulation pipeline of the triple-effect heating evaporation device and is linked with the discharge valve arranged on the discharge pipeline, so that the discharge concentration is controllable and adjustable, and uniform discharge is realized; it can effectively prevent problems such as material decomposition and material crystallization caused by local over-concentration during the concentration process.

[0041] In a specific embodiment of the present utility model, the discharge valve can be an electric valve, and the electric valve and the density monitoring component can be electrically connected to the central control device at the same time, so as to realize the linkage between the discharge valve and the density monitoring component.

[0042] In a specific embodiment of the present utility model, the types and stacking methods of the fillers in the first gas-liquid separation device, the second gas-liquid separation device and the third gas-liquid separation device can be adjusted according to the materials and concentration requirements, and no further limitation is made here.

[0043] In a specific embodiment of the present utility model, the steam inlet of the first-effect heating evaporation device is connected to the live steam inlet pipeline.

[0044] In a specific embodiment of the present utility model, the raw liquid spraying component includes spraying heads and spraying pipelines. The spraying heads are arranged inside the first gas-liquid separation device, the second gas-liquid separation device and the third gas-liquid separation device, and the spraying pipelines are respectively and independently connected to the first-effect heating evaporation device, the second-effect heating evaporation device and the third-effect heating evaporation device through raw liquid export pipelines.

[0045] In a specific embodiment of the present utility model, distributors are arranged between the raw liquid spraying components and the fillers in the first gas-liquid separation device, the second gas-liquid separation device and the third gas-liquid separation device respectively and independently.

[0046] In the present utility model, by arranging the gas-liquid separation device and cooperating with the raw liquid spraying, the entrainment of mist and foam in the steam is effectively prevented, and the materials entrained in the evaporated condensate after concentration can be reduced by more than 95%, and the evaporated condensate can be effectively recycled.

[0047] In a specific embodiment of the present utility model, the first-effect heating and evaporation device is provided with a live steam outlet pipeline, and the connecting pipeline between the steam outlet of the first gas-liquid separation device and the steam inlet of the second-effect heating and evaporation device is connected to this steam outlet pipeline, which is used to supplement heat to the steam entering the second-effect heating and evaporation device to ensure the heat energy supply of the second-effect heating and evaporation device.

[0048] In a specific embodiment of the present utility model, the second-effect heating and evaporation device is provided with a pressure regulating pipeline, and a valve is arranged on this pressure regulating pipeline. The connecting pipeline between the steam outlet of the second gas-liquid separation device and the steam inlet of the third-effect heating and evaporation device is connected to this pressure regulating pipeline; this pressure regulating pipeline is used to control the pressure of the first-effect heating and evaporation device, thereby controlling the boiling point and steam temperature.

[0049] In a specific embodiment of the present utility model, the third-effect heating and evaporation device is provided with a pressure regulating pipeline, and a valve is arranged on the pressure regulating pipeline. The pressure regulating pipeline is connected to the steam recovery pipeline; this pressure regulating pipeline is used to control the pressure of the second-effect heating and evaporation device, thereby controlling the boiling point and steam temperature.

[0050] In a specific embodiment of the present utility model, the live steam condensate is used to supply heat to the second heat exchange device. After heat exchange, it is discharged through the pipeline connected to the heat source outlet of the second heat exchange device, or used to supply heat to other devices.

[0051] In a specific embodiment of the present utility model, the evaporation condensate is used to supply heat to the first heat exchange device. After heat exchange, it is collected through a temporary storage tank connected to the heat source outlet of the first heat exchange device.

[0052] In a specific embodiment of the present utility model, a liquid seal assembly (such as a U-shaped tube) can be arranged on the connecting pipeline between the evaporation condensate outlets of the second-effect heating and evaporation device and the third-effect heating and evaporation device and the evaporation condensate storage device to prevent gas from entering the evaporation condensate storage device.

[0053] In a specific embodiment of the present utility model, the triple-effect evaporation system device is further provided with a third heat exchange device, which is used to cool and collect the steam returned from the third-effect heating and evaporation device. The cold source is circulating water, that is, the cold source inlet and cold source outlet of the third heat exchange device are respectively and independently connected to the circulating water inlet pipeline and the circulating water outlet pipeline. The gas inlet of the third heat exchange device is connected to the steam outlet of the third gas-liquid separation device through a steam recovery pipeline. The condensate outlet of the third heat exchange device is connected to the temporary storage tank, and the temporary storage tank is provided with a liquid discharge pipeline.

[0054] In a specific embodiment of the present utility model, the temporary storage tank is connected to the vacuum system.

[0055] In a specific embodiment of the present utility model, liquid conveying devices, such as liquid pumps, are provided on each liquid conveying pipeline to achieve liquid transmission. The installation position can be selected according to specific liquid transmission requirements and will not be further limited herein.

[0056] In a specific embodiment of the present utility model, the operation mode of the triple-effect evaporation system device can be as follows:

[0057] The stock solution enters the first-effect heating and evaporation device after being heated by the first heat exchange device and the second heat exchange device through the stock solution feeding pipeline. Live steam enters the first-effect heating and evaporation device through the live steam inlet pipeline to conduct primary concentration on the stock solution; the live steam condensate enters the live steam condensate storage device for heating the second heat exchange device.

[0058] The steam generated after heating and evaporation of the stock solution enters the first gas-liquid separation device. Through the packing in the first gas-liquid separation device and the stock solution spraying realized by the stock solution spraying assembly, the materials in the steam are separated. The materials return to the discharge circulation pipeline of the first-effect heating and evaporation device, and the steam enters the second-effect heating and evaporation device; the materials obtained after primary concentration also enter the second-effect heating and evaporation device for secondary concentration; when the steam temperature is insufficient, heat is supplemented through the live steam outlet pipeline of the first-effect heating and evaporation device.

[0059] The steam generated after heating and evaporation of the materials in the second-effect heating and evaporation device enters the second gas-liquid separation device. Through the packing in the second gas-liquid separation device and the stock solution spraying realized by the stock solution spraying assembly, the materials in the steam are separated. The materials return to the discharge circulation pipeline of the second-effect heating and evaporation device, and the steam enters the third-effect heating and evaporation device; the materials obtained after secondary concentration also enter the third-effect heating and evaporation device for tertiary concentration; the evaporation condensate enters the evaporation condensate storage device for heating the first heat exchange device, and after heating, the evaporation condensate enters the temporary storage tank.

[0060] The steam generated after heating and evaporation of the materials in the third-effect heating and evaporation device enters the third gas-liquid separation device. Through the packing in the third gas-liquid separation device and the stock solution spraying realized by the stock solution spraying assembly, the materials in the steam are separated. The materials return to the discharge circulation pipeline of the third-effect heating and evaporation device, and the steam enters the temporary storage tank after being condensed by the third heat exchange device; the evaporation condensate enters the evaporation condensate storage device for heating the first heat exchange device, and after heating, the evaporation condensate enters the temporary storage tank.

[0061] The product obtained after tertiary concentration is monitored for density by the density monitoring assembly provided on the discharge circulation pipeline of the third-effect heating and evaporation device. When the density meets the requirements (i.e., the concentration meets the concentration requirements), the product is collected through the discharge pipeline. When the density does not meet the requirements (i.e., the concentration does not meet the concentration requirements), the discharge valve of the discharge pipeline is closed, and the materials return to the third-effect heating and evaporation device through the circulation pipeline for further concentration.

[0062] To better illustrate the present utility model and facilitate understanding of its technical solution, typical but non-limiting embodiments of the present utility model are as follows:

[0063] Embodiment 1

[0064] This embodiment provides a triple-effect evaporation system device, the structure of which is as Figure 1 and 2 shown. The system device includes a first-effect heating and evaporation device E001, a second-effect heating and evaporation device E002, and a third-effect heating and evaporation device E003. The first-effect heating and evaporation device E001, the second-effect heating and evaporation device E002, and the third-effect heating and evaporation device E003 are respectively and independently provided with a discharge circulation pipeline;

[0065] The discharge circulation pipeline of the third-effect heating and evaporation device E003 is provided with a density monitoring component and a discharge port. The density monitoring component is arranged on one side of the discharge port against the discharge flow direction. The discharge port is connected to a discharge pipeline, and the discharge pipeline is provided with a discharge valve;

[0066] A first gas-liquid separation device SE001 is arranged on the connecting pipeline between the steam outlet of the first-effect heating and evaporation device E001 and the steam inlet of the second-effect heating and evaporation device E002; a second gas-liquid separation device SE002 is arranged on the connecting pipeline between the steam outlet of the second-effect heating and evaporation device E002 and the steam inlet of the third-effect heating and evaporation device E003; a third gas-liquid separation device SE003 is arranged on the steam recovery pipeline connected to the steam outlet of the third-effect heating and evaporation device E003;

[0067] The first gas-liquid separation device SE001 is internally provided with packing. A raw liquid spraying component is arranged above the packing. The raw liquid spraying component is connected to the first-effect heating and evaporation device E001 through a raw liquid export pipeline; the first gas-liquid separation device SE001 is provided with a steam inlet, and the steam inlet is arranged below the packing. The steam inlet of the first gas-liquid separation device SE001 is connected to the steam outlet of the first-effect heating and evaporation device E001; a steam outlet is arranged at the top of the first gas-liquid separation device SE001, and the steam outlet is connected to the steam inlet of the second-effect heating and evaporation device E002; a liquid outlet is arranged at the bottom of the first gas-liquid separation device SE001, and the liquid outlet is connected to the discharge circulation pipeline of the first-effect heating and evaporation device E001; a material outlet is arranged on the discharge circulation pipeline of the first-effect heating and evaporation device E001, and the material outlet is connected to the material inlet of the second-effect heating and evaporation device E002; the first-effect heating and evaporation device E001 is provided with a live steam export pipeline, and the connecting pipeline between the steam outlet of the first gas-liquid separation device SE001 and the steam inlet of the second-effect heating and evaporation device E002 is connected to this steam export pipeline;

[0068] The second gas-liquid separation device SE002 is internally provided with packing, and a raw liquid spraying assembly is arranged above the packing. The raw liquid spraying assembly is connected to the second-effect heating evaporation device E002 through a raw liquid outlet pipeline; the second gas-liquid separation device SE002 is provided with a steam inlet, which is arranged below the packing. The steam inlet of the second gas-liquid separation device SE002 is connected to the steam outlet of the second-effect heating evaporation device E002; a steam outlet is arranged at the top of the second gas-liquid separation device SE002, and the steam outlet is connected to the steam inlet of the third-effect heating evaporation device E003; a liquid outlet is arranged at the bottom of the second gas-liquid separation device SE002, and the liquid outlet is connected to the discharge circulation pipeline of the second-effect heating evaporation device E002; a material outlet is arranged on the discharge circulation pipeline of the second-effect heating evaporation device E002, and the material outlet is connected to the material inlet of the third-effect heating evaporation device E002; the second-effect heating evaporation device E002 is provided with a pressure regulating pipeline, and a valve is arranged on the pressure regulating pipeline. The connecting pipeline between the steam outlet of the second gas-liquid separation device SE002 and the steam inlet of the third-effect heating evaporation device E003 is connected to the pressure regulating pipeline;

[0069] The third gas-liquid separation device SE003 is internally provided with packing, and a raw liquid spraying assembly is arranged above the packing. The raw liquid spraying assembly is connected to the third-effect heating evaporation device E003 through a raw liquid outlet pipeline; the third gas-liquid separation device SE003 is provided with a steam inlet, which is arranged below the packing. The steam inlet of the third gas-liquid separation device SE003 is connected to the steam outlet of the third-effect heating evaporation device E003; a steam outlet is arranged at the top of the third gas-liquid separation device SE003, and the steam outlet is connected to a steam recovery pipeline; a liquid outlet is arranged at the bottom of the third gas-liquid separation device SE003, and the liquid outlet is connected to the discharge circulation pipeline of the third-effect heating evaporation device E003; the third-effect heating evaporation device E003 is provided with a pressure regulating pipeline, and a valve is arranged on the pressure regulating pipeline. The pressure regulating pipeline is connected to the steam recovery pipeline;

[0070] The material inlet of the first-effect heating evaporation device E001 is connected to the raw liquid feed pipeline, and a first heat exchange device HE001 and a second heat exchange device HE002 are successively arranged on the raw liquid feed pipeline; the first-effect heating evaporation device E001 is provided with a live steam condensate outlet, and the live steam condensate outlet is connected to the liquid inlet of the live steam condensate storage device V002; the second-effect heating evaporation device E002 and the third-effect heating evaporation device E003 are respectively and independently provided with evaporation condensate outlets, and the evaporation condensate outlets are respectively and independently connected to the liquid inlets of the evaporation condensate storage device V003; the liquid outlet of the live steam condensate storage device V002 is connected to the heat source inlet of the second heat exchange device HE002; the liquid outlet of the evaporation condensate storage device V003 is connected to the heat source inlet of the first heat exchange device HE001;

[0071] The steam recovery pipeline is connected to the gas inlet of the third heat exchange device E004. The condensate outlet of the third heat exchange device E004 is connected to the temporary storage tank V004. The heat source outlet of the first heat exchange device is connected to the temporary storage tank V004. The temporary storage tank V004 is provided with a liquid outlet pipeline, and a liquid pump P007 is arranged on the liquid outlet pipeline. The cold source inlet and the cold source outlet of the third heat exchange device E004 are independently connected to the circulating water inlet pipeline and the circulating water outlet pipeline respectively. The temporary storage tank V004 is connected to the vacuum system.

[0072] A liquid pump P001 is arranged on the raw material inlet pipeline. A liquid pump P002 is arranged on the discharge circulation pipeline of the first-effect heating and evaporation device E001. A liquid pump P003 is arranged on the discharge circulation pipeline of the second-effect heating and evaporation device E002. A liquid pump P004 is arranged on the discharge circulation pipeline of the third-effect heating and evaporation device E003. A liquid pump P005 is arranged on the connecting pipeline between the live steam condensate storage device V002 and the second heat exchange device HE002. A liquid pump P006 is arranged on the connecting pipeline between the evaporation condensate storage device V003 and the first heat exchange device HE001.

[0073] Example 2

[0074] This example provides an operation method for the three-effect evaporation system device provided in the example. The operation method includes:

[0075] The original liquid enters the first-effect heating and evaporation device E001 after being heated by the first heat exchange device HE001 and the second heat exchange device HE002 through the original liquid feed pipeline. The live steam enters the first-effect heating and evaporation device E001 through the live steam inlet pipeline to conduct primary concentration on the original liquid. The live steam condensate enters the live steam condensate storage device V002 for heating the second heat exchange device HE002.

[0076] The steam generated after the original liquid is heated and evaporated enters the first gas-liquid separation device SE001. Through the packing in the first gas-liquid separation device SE001 and the original liquid spraying realized by the original liquid spraying component, the materials in the steam are separated. The materials are returned to the discharge circulation pipeline of the first-effect heating and evaporation device E001, and the steam enters the second-effect heating and evaporation device E002. The materials obtained after primary concentration also enter the second-effect heating and evaporation device E002 for secondary concentration. When the steam temperature is insufficient, heat is supplemented through the live steam export pipeline of the first-effect heating and evaporation device E001.

[0077] The steam generated after the material in the double-effect heating evaporation device E002 is heated and evaporated enters the second gas-liquid separation device E002. Through the packing in the second gas-liquid separation device SE002 and the raw liquid spraying component to achieve raw liquid spraying, the material in the steam is separated. The material returns to the discharge circulation pipeline of the double-effect heating evaporation device E002, and the steam enters the triple-effect heating evaporation device E003; the material obtained after secondary concentration also enters the triple-effect heating evaporation device E003 for tertiary concentration; the evaporation condensate enters the evaporation condensate storage device V003, which is used to supply heat to the first heat exchange device HE001. After heat supply, the evaporation condensate enters the temporary storage tank V004;

[0078] The steam generated after the material in the triple-effect heating evaporation device E003 is heated and evaporated enters the third gas-liquid separation device SE003. Through the packing in the third gas-liquid separation device SE003 and the raw liquid spraying component to achieve raw liquid spraying, the material in the steam is separated. The material returns to the discharge circulation pipeline of the triple-effect heating evaporation device E003, and the steam enters the temporary storage tank V004 after being condensed by the third heat exchange device E004; the evaporation condensate enters the evaporation condensate storage device V003, which is used to supply heat to the first heat exchange device HE001. After heat supply, the evaporation condensate enters the temporary storage tank;

[0079] The product obtained after tertiary concentration is monitored for density by the density monitoring component set in the discharge circulation pipeline of the triple-effect heating evaporation device E003. When the density meets the requirements (i.e., the concentration meets the concentration requirements), the product is collected by the discharge pipeline. When the density does not meet the requirements (i.e., the concentration does not meet the concentration requirements), the discharge valve of the discharge pipeline is closed, and the material returns to the triple-effect heating evaporation device E003 through the circulation pipeline for further concentration.

[0080] Application Example 1

[0081] This application example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material:

[0082] The initial concentration of a certain material is 11%, and the density is 1.042 g / ml. It needs to be concentrated to a concentration of 40% - 45%, and the density after concentration is 1.112 g / ml - 1.115 g / ml. The material is concentrated by triple-effect. When the display value of the densitometer after concentration is greater than or equal to 1.112 g / ml, the discharge regulating valve is adjusted to control the extraction flow rate so that the extracted concentrated liquid is all between 1.112 and 1.115. Samples of the concentrated liquid are taken through analysis and detection, and the content of the concentrated liquid is 42.31%.

[0083] Comparative Example 1

[0084] This comparative example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material, but the system device is not provided with a density monitoring component:

[0085] The initial concentration of a certain material is 11%, and the weight is 2000 kg. The material is concentrated by triple-effect concentration. After concentration, the concentrated liquid is weighed, and the weight of the material is 500 kg. After concentration, it is sent for analysis and testing. The content of the material is 40.23%, and the content of impurity A increases by 3.25%. During the concentration process, due to over-concentration, the material decomposes.

[0086] Application Example 2

[0087] This application example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material:

[0088] Transfer the 12% ammonium sulfate aqueous solution to triple-effect concentration and concentrate it to a content of 35%. Set the density to 1.175 g / ml for discharging. The discharging content is 36.12%. No crystals are generated during the discharging process, and no crystal precipitation and pipe blockage occur.

[0089] Comparative Example 2

[0090] This comparative example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material, but the system device is not provided with a density monitoring component:

[0091] Transfer the 12% ammonium sulfate aqueous solution to triple-effect concentration and concentrate it to a content of 35%. Ammonium sulfate crystals precipitate during the concentration process, resulting in the blockage of the pipes in the triple-effect concentration system.

[0092] Application Example 3

[0093] This application example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material:

[0094] A certain material (material components: DL-pantolactone contains 17%, water contains 83%) is concentrated by triple-effect concentration. In the steam condensate after concentration, the content of DL-pantolactone in DL-pantolactone is below 0.03%, and the evaporation condensate is recycled.

[0095] Comparative Example 3

[0096] This comparative example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material, but the system device is not provided with the first gas-liquid separation device, the second gas-liquid separation device, and the third gas-liquid separation device containing the original liquid spraying component:

[0097] A certain material (material components: DL-pantolactone contains 17%, water contains 83%) is concentrated by triple-effect evaporation. When no gas-liquid separator and raw liquid spraying are added, in the condensed steam after concentration, the DL-pantolactone contains 1% of DL-pantolactone.

[0098] Application Example 4

[0099] This application example uses the triple-effect evaporation system device provided in Example 1 and the operation mode provided in Example 2 to concentrate the material:

[0100] A certain material is concentrated by triple-effect evaporation. The temperature of the condensed steam generated by the live steam is 100 °C, the temperature of the evaporation condensate is 50 °C, and the feeding temperature of the material is at room temperature (25 °C). The evaporation condensate is heat-exchanged with the feeding raw liquid once through the first heat-exchange device, and then the condensed steam is heat-exchanged with the raw material twice through the second heat-exchange device. The feeding temperature of the heat-exchanged raw material can reach 70 °C. Through the secondary utilization of heat, the temperature of the feeding raw liquid is increased by 45 °C, and the heat is effectively reused.

[0101] The applicant declares that the present utility model uses the above-mentioned embodiments to illustrate the detailed structural features of the present utility model, but the present utility model is not limited to the above-mentioned detailed structural features, that is, it does not mean that the present utility model must rely on the above-mentioned detailed structural features to be implemented. Those skilled in the art should understand that any improvement to the present utility model, the equivalent replacement of the components selected for the present utility model, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present utility model.

[0102] The preferred embodiments of the present utility model have been described in detail above. However, the present utility model is not limited to the specific details in the above-mentioned embodiments. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solution of the present utility model, and these simple modifications all belong to the protection scope of the present utility model.

[0103] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above-mentioned specific embodiments can be combined in any suitable way. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination methods.

[0104] In addition, any combination can be made between various different embodiments of the present utility model, as long as it does not violate the idea of the present utility model, it should also be regarded as the content disclosed by the present utility model.

Claims

1. A triple-effect evaporation system, characterized in that: The system device comprises a first-effect heating evaporation device, a second-effect heating evaporation device and a third-effect heating evaporation device, wherein the first-effect heating evaporation device, the second-effect heating evaporation device and the third-effect heating evaporation device are respectively and independently provided with a discharge circulation pipeline; The discharge circulation pipeline of the triple-effect heating evaporation device is provided with a density monitoring component and a discharge port, the density monitoring component is arranged on the side of the discharge port opposite to the discharge flow direction, the discharge port is connected to the discharge pipeline, and the discharge pipeline is provided with a discharge valve; A first gas-liquid separation device is provided on the connecting pipeline between the steam outlet of the first-effect heating evaporation device and the steam inlet of the second-effect heating evaporation device; a second gas-liquid separation device is provided on the connecting pipeline between the steam outlet of the second-effect heating evaporation device and the steam inlet of the triple-effect heating evaporation device; and a third gas-liquid separation device is provided on the steam recovery pipeline connected to the steam outlet of the triple-effect heating evaporation device.

2. The triple-effect evaporation system according to claim 1, characterized in that: A filler is arranged inside the first gas-liquid separation device, a raw liquid spraying assembly is arranged above the filler, and the raw liquid spraying assembly is connected to a first-effect heating evaporation device through a raw liquid outlet pipeline; The first gas-liquid separation device is provided with a steam inlet, the steam inlet is arranged below the filler, and the steam inlet of the first gas-liquid separation device is connected to the steam outlet of the first-effect heating evaporation device; The top of the first gas-liquid separation device is provided with a steam outlet, and the steam outlet is connected to the steam inlet of the second-effect heating evaporation device; A liquid outlet is provided at the bottom of the first gas-liquid separation device, and the liquid outlet is connected to the discharge circulation pipeline of the first-effect heating evaporation device.

3. The triple-effect evaporation system according to claim 1, characterized in that: A filler is arranged inside the second gas-liquid separation device, a stock liquid spraying assembly is arranged above the filler, and the stock liquid spraying assembly is connected to the second-effect heating evaporation device through a stock liquid outlet pipeline; The second gas-liquid separation device is provided with a steam inlet, the steam inlet is arranged below the packing, and the steam inlet of the second gas-liquid separation device is connected to the steam outlet of the second-effect heating evaporation device; The second gas-liquid separation device is provided with a steam outlet at the top, and the steam outlet is connected to the steam inlet of the triple-effect heating evaporation device; The second gas-liquid separation device is provided with a liquid outlet at the bottom, and the liquid outlet is connected to the discharge circulation pipeline of the second-effect heating evaporation device.

4. The triple-effect evaporation system according to claim 1, characterized in that: The third gas-liquid separation device is provided with a filler inside, a stock liquid spraying assembly is provided above the filler, and the stock liquid spraying assembly is connected to the three-effect heating evaporation device through a stock liquid outlet pipeline; The third gas-liquid separation device is provided with a steam inlet, the steam inlet is arranged below the filler, and the steam inlet of the third gas-liquid separation device is connected to the steam outlet of the triple-effect heating evaporation device; The top of the third gas-liquid separation device is provided with a steam outlet, and the steam outlet is connected to a steam recovery pipeline; The third gas-liquid separation device is provided with a liquid outlet at the bottom, and the liquid outlet is connected to the discharge circulation pipeline of the triple-effect heating evaporation device.

5. The triple-effect evaporation system according to any one of claims 2 to 4, characterized in that: The material inlet of the first-effect heating evaporation device is connected to the raw liquid feeding pipeline.

6. The triple-effect evaporation system according to claim 5, characterized in that: The raw liquid feeding pipeline is provided with a first heat exchange device and a second heat exchange device in sequence.

7. The triple-effect evaporation system according to claim 6, characterized in that: The single-effect heating evaporation device is provided with a raw steam condensate outlet, and the raw steam condensate outlet is connected to the liquid inlet of the raw steam condensate storage device.

8. The triple-effect evaporation system according to claim 6, characterized in that: The two-effect heating evaporation device and the three-effect heating evaporation device are respectively and independently provided with evaporation condensate outlets, and the evaporation condensate outlets are respectively and independently connected to the liquid inlet of the evaporation condensate storage device.

9. The triple-effect evaporation system according to claim 7, characterized in that: The liquid outlet of the raw steam condensate storage device is connected to the heat source inlet of the second heat exchange device.

10. The triple-effect evaporation system according to claim 8, characterized in that: The liquid outlet of the evaporation condensate storage device is connected to the heat source inlet of the first heat exchange device.

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