Fin type multi-effect evaporation and concentration device

Abstract

The utility model discloses a fin type multi-effect evaporation and concentration device, which comprises a first-effect evaporation and separation device, a second-effect evaporation and separation device, a third-effect evaporation and separation device and a fourth-effect evaporation and separation device, wherein the first-effect evaporation and separation device is used for heating liquid feed to evaporation temperature to evaporate volatile substances so as to realize separation and obtain primary feed; the first-effect fin type heat exchanger is used for evaporation and compression; the second-effect evaporation and separation device is used for further evaporating and separating the vaporized liquid; a coil heat exchanger for evaporation and compression is arranged; and the matching device is used for controlling the first-effect evaporation separation device and the second-effect evaporation separation device. According to the utility model, the spiral plate type heat exchanger is arranged in the heater to collect residual steam of fresh steam in evaporation and concentration, and the heat of the residual steam is used for heating feed liquid, so that the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of evaporation and concentration, and particularly relates to a fin-type multi-effect evaporation and concentration device. Background Art

[0002] In fields such as traditional Chinese medicine concentration, food processing, fruit juice concentration, beverage production, dairy production, chemical industry, pharmaceutical industry, wastewater treatment, environmental protection, and seawater desalination, it is necessary to evaporate or concentrate liquid materials to obtain the required substances (concentrated liquids or thick pastes) or reduce emissions. These industries are all high-energy-consuming industries. Therefore, it is necessary to research and apply reasonable new evaporation or concentration technologies and new equipment.

[0003] At present, the evaporation and concentration methods used in traditional Chinese medicine concentration, food processing, fruit juice concentration, beverage production, dairy production, chemical industry, pharmaceutical industry, wastewater treatment, environmental protection, and seawater desalination in China include steam heating method, membrane concentration, resin adsorption, ultrafiltration separation, etc.: 1) According to the evaporation and concentration temperature: high temperature (100 °C) and low temperature (≤95 °C); 2) According to the heat exchanger structure: coil type, tube type, and plate type; 3) According to the material flow direction: rising film and falling film; 4) According to the material and steam flow directions: co-current, counter-current, cross-flow, and mixed flow; 5) According to the steam compression method: mechanical vapor recompression evaporation (MVR) and thermal vapor recompression evaporation (TVR). The evaporation and concentration equipment used includes: coil evaporation, flash evaporation concentration, single-effect concentration, double-effect concentration, multi-effect concentration, TVR, and MVR, etc. The commonly used equipment includes: single-effect concentration, double-effect concentration, multi-effect concentration, and MVR. At present, in various industries in China, double-effect concentration and MVR are the mainstream equipment and have been widely used in various industries in recent years.

[0004] The existing evaporation and concentration methods and equipment have low heat transfer efficiency, high energy consumption, high equipment cost, high operating cost, large water consumption, large floor area and space area, etc. Content of the Utility Model

[0005] In view of the above technical bottleneck problems, the utility model provides a fin-type multi-effect evaporation and concentration device. Correspondingly, a fin-type multi-effect evaporation and concentration method is also provided, with the heat transfer efficiency increased by 10 - 5 times, improving the efficiency and quality of evaporation and concentration, greatly reducing energy consumption, saving water (no need for cooling water), low equipment cost and operating cost, small floor area and space area, etc., and being convenient for cleaning, energy-saving and environment-friendly.

[0006] A fin-type multi-effect evaporation and concentration device includes:

[0007] A first-effect vaporization and separation device that heats the liquid feed to the evaporation temperature to evaporate the volatile substances, thereby achieving separation and obtaining the first feed; a first-effect fin-type heat exchanger is provided for evaporation compression;

[0008] The two-effect evaporation separation device further evaporates and separates the vaporized liquid, and is provided with a coil heat exchanger for evaporation compression;

[0009] The supporting device is used to control the first-effect vaporization separation device and the second-effect evaporation separation device.

[0010] The supporting device includes a heater for heating the liquid feed.

[0011] A spiral plate heat exchanger is arranged in the heater. One end of the spiral plate heat exchanger is butted with the other end of the first-effect finned heat exchanger, and the other end is butted with the other end of the coil heat exchanger, and the remaining steam of the fresh steam of the first-effect finned heat exchanger is used to heat the heater.

[0012] Further, the first-effect vaporization separation device includes a first-effect vaporization chamber as the main body, and the following are also arranged in the first-effect vaporization chamber:

[0013] A spray head for spraying the feed liquid.

[0014] A first-effect finned heat exchanger is provided with a fresh steam inlet valve for controlling opening and closing, and is used for heat exchange heating of the feed liquid to perform preliminary evaporation and concentration to obtain a first feed.

[0015] A first-effect vaporization pipe for outputting the first feed.

[0016] Further, the second-effect evaporation separation device includes a second-effect evaporation chamber as the main body, and the following are also arranged in the second-effect evaporation chamber:

[0017] A second-effect spiral plate heat exchanger is butted with the first-effect vaporization pipe of the first-effect vaporization chamber to obtain the first feed and further heat it.

[0018] A coil heat exchanger is butted with the first-effect finned heat exchanger to obtain the remaining steam of the fresh steam of the first-effect finned heat exchanger to heat the first feed even further.

[0019] A second-effect evaporation pipe is butted with the second-effect spiral plate heat exchanger to obtain secondary steam.

[0020] Further, the supporting device includes:

[0021] A feed assembly, and the feed assembly includes:

[0022] A filter, one end of which is used to receive the liquid feed and perform preliminary filtration on the liquid feed.

[0023] A liquid delivery pump, one end of which is butted with the other end of the filter to obtain the preliminarily filtered liquid feed.

[0024] The preheating coil assembly is docked at one end with the other end of the infusion pump to preheat the preliminarily filtered liquid feed and obtain the preheated liquid feed.

[0025] The heater is docked at one end with the other end of the preheating coil assembly and at the other end with the spray port of the first-effect vaporization device to further heat the preheated liquid feed.

[0026] A spiral plate heat exchanger is provided in the heater. One end of the spiral plate heat exchanger is docked with the other end of the first-effect finned heat exchanger, and the other end is docked with the other end of the coil heat exchanger to obtain the residual steam of the fresh steam of the first-effect finned heat exchanger to heat the heater.

[0027] Furthermore, the supporting device includes:

[0028] A vacuum control assembly for controlling the vacuum degrees of the first-effect vaporization and separation device and the second-effect evaporation and separation device.

[0029] The vacuum control assembly includes a water ring vacuum pump and a vacuum storage tank connected in series in sequence.

[0030] A first liquid circulation pump for controlling the opening and closing of the spray head.

[0031] A second liquid circulation pump for controlling the opening and closing of the second-effect evaporation chamber.

[0032] Furthermore, the supporting device includes:

[0033] The preheating coil assembly includes:

[0034] A primary condensation collection tank is docked with the second-effect evaporation tube and is provided with a first preheating coil. One end of the first preheating coil is docked with the other end of the infusion pump.

[0035] A secondary condensation collection tank is docked with the second-effect evaporation tube and is provided with a second preheating coil. One end of the second preheating coil is docked with the other end of the first preheating coil; a type-IV spiral plate heat exchanger is also provided, and the type-IV spiral plate heat exchanger exchanges heat and cools the second-effect steam of the second-effect evaporation tube.

[0036] The positive and progressive effects of the present utility model are as follows:

[0037] The present utility model collects the residual steam of fresh steam in evaporation and concentration by arranging a spiral plate heat exchanger in the heater, and heats the feed liquid with the heat of the residual steam, thereby improving the heat exchange efficiency; further, by arranging a condensation tube in the preheating coil assembly, the waste heat of the secondary steam is obtained to preheat the feed liquid, thereby improving the heat exchange efficiency; furthermore, the present utility model uses a finned heat exchange device for heat exchange, and compared with a tubular heat exchanger, the heat exchange efficiency is improved. Brief Description of the Drawings

[0038] Figure 1 The figure is a system schematic diagram of a fin - type multi - effect evaporation and concentration device of the present utility model.

[0039] Reference numerals: 1. Fresh steam inlet valve; 2. Spray head; 3. First - effect vaporization chamber; 4. First - effect fin - type heat exchanger; 5. First liquid circulation pump; 6. Heater; 6 - 1. Spiral plate heat exchanger; 7. First - effect vaporization tube; 8. Second - effect evaporation chamber; 8 - 1. Coil heat exchanger; 9. Second - effect spiral plate heat exchanger; 10. Second liquid circulation pump 10; 11. Second - effect evaporation tube; 12. Primary condensate collection tank; 12 - 1. First pre - heating coil; 13. Secondary condensate collection tank; 13 - 1. Second pre - heating coil; 13 - 2. Type - IV spiral plate heat exchanger; 14. Infusion pump; 15. Filter; 16. Vacuum storage tank; 17. Water ring vacuum pump. Detailed Description of the Preferred Embodiments

[0040] The following describes the embodiments of the present utility model through specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model.

[0041] Referring to Figure 1 , a fin - type multi - effect evaporation and concentration device, in one example, includes:

[0042] A first - effect vaporization and separation device that heats the liquid feed to the evaporation temperature, evaporates volatile substances, thereby achieving separation and obtaining the primary feed; and is provided with a first - effect fin - type heat exchanger 4 for evaporation compression;

[0043] A second - effect evaporation and separation device that further evaporates and separates the vaporized liquid; and is provided with a coil heat exchanger 8 - 1 for evaporation compression;

[0044] A supporting device for controlling the first - effect vaporization and separation device and the second - effect evaporation and separation device,

[0045] The supporting device includes a heater 6 that heats the liquid feed;

[0046] The heater 6 is provided with a spiral plate heat exchanger 6 - 1. One end of the spiral plate heat exchanger 6 - 1 is docked with the other end of the first - effect fin - type heat exchanger 4, and the other end is docked with the other end of the coil heat exchanger 8 - 1 to obtain the residual steam of the fresh steam of the first - effect fin - type heat exchanger 4 to heat the heater 6.

[0047] Further, in one example, the first-effect vaporization separation device includes a first-effect vaporization chamber 3 as the main body, and the following are further provided in the first-effect vaporization chamber 3:

[0048] A spray head 2 for spraying the feed liquid;

[0049] A first-effect finned heat exchanger 4 is provided with a fresh steam inlet valve 1 for controlling opening and closing, and is used for heat-exchanging and heating the feed liquid to perform preliminary evaporation and concentration to obtain a first feed.

[0050] A first-effect vaporization tube 7 for outputting the first feed.

[0051] Further, the second-effect evaporation separation device includes a second-effect evaporation chamber 88 as the main body, and the following are further provided in the second-effect evaporation chamber 88:

[0052] A second-effect spiral plate heat exchanger 96-1 is docked with the first-effect vaporization tube 7 of the first-effect vaporization chamber 3 to obtain the first feed and further heat it.

[0053] A coil heat exchanger 8-1 is docked with the first-effect finned heat exchanger 4 to obtain the residual steam of the fresh steam of the first-effect finned heat exchanger 4 to further heat the first feed.

[0054] A second-effect evaporation tube 11 is docked with the second-effect spiral plate heat exchanger 96-1 to obtain secondary steam.

[0055] Further, in one example, the supporting device includes:

[0056] A feed assembly, and the feed assembly includes:

[0057] A filter 15, one end of which is used to receive the liquid feed and preliminarily filter the liquid feed;

[0058] An infusion pump 14, one end of which is docked with the other end of the filter 15 to obtain the preliminarily filtered liquid feed;

[0059] A preheating coil assembly, one end of which is docked with the other end of the infusion pump 14 to preheat the preliminarily filtered liquid feed to obtain the preheated liquid feed;

[0060] A heater 6, one end of which is docked with the other end of the preheating coil assembly, and the other end is docked with the spray port of the first-effect vaporization device to further heat the preheated liquid feed;

[0061] A spiral plate heat exchanger 6-1 is provided in the heater 6. One end of the spiral plate heat exchanger 6-1 is docked with the other end of the first-effect finned heat exchanger 4, and the other end is docked with the other end of the coil heat exchanger 8-1 to obtain the residual steam of the fresh steam of the first-effect finned heat exchanger 4 to heat the heater 6.

[0062] Further, in one example, the supporting device includes:

[0063] A vacuum control assembly for controlling the vacuum degrees of the first-effect vaporization separation device and the second-effect evaporation separation device;

[0064] The vacuum control assembly includes a water ring vacuum pump 17 and a vacuum storage tank 16 connected in series in sequence;

[0065] A first liquid circulation pump 5 for controlling the opening and closing of the spray head 2;

[0066] A second liquid circulation pump 10 for controlling the opening and closing of the second-effect evaporation chamber 88.

[0067] Further, in one example, the supporting device includes:

[0068] The preheating coil assembly includes:

[0069] A primary condensation collection tank 12, which is docked with the second-effect evaporation tube 11, is provided with a first preheating coil 12-1, and one end of the first preheating coil 12-1 is docked with the other end of the infusion pump 14;

[0070] A secondary condensation collection tank 13, which is docked with the second-effect evaporation tube 11, is provided with a second preheating coil 13-1, and one end of the second preheating coil 13-1 is docked with the other end of the first preheating coil 12-1; a type-IV spiral plate heat exchanger 13-2 is also provided, and the type-IV spiral plate heat exchanger 13-2 exchanges heat and cools the second-effect steam of the second-effect evaporation tube 11.

[0071] Working principle: The feed liquid is filtered by the filter 15 and then transported by the infusion pump 14 to the second preheating coil 13-1, the first preheating coil 12-1, and then heated to the required temperature in the heater 6; the vacuum pump 17 is turned on to make the vacuum degrees of the first-effect vaporization chamber and the second-effect evaporation chamber meet the requirements.

[0072] Then the first liquid circulation pump 5 is turned on to transport the heated feed liquid to the spray head 23, and primary evaporation and concentration are carried out in the first-effect vaporization chamber 3 to obtain a first feed, and the second liquid circulation pump 10 is turned on to transport the first feed to the second-effect evaporation chamber 8 for secondary evaporation and concentration.

[0073] During this process, the fresh steam valve 1 is turned on to heat the first-effect finned heat exchanger 4, and the surplus steam sequentially heats the spiral plate heat exchanger 6-1 of the heater, heats the second-effect coil heat exchanger 8-1, and the secondary steam generated by the first-effect evaporation enters the second-effect spiral plate heat exchanger 9 for heating.

[0074] The whole machine starts up and runs. When the temperature and vacuum are stable, the feeding flow rate is automatically controlled. The first-stage condensate collection tank 12 collects condensate water for preheating. The secondary steam from the second-effect evaporation is cooled by the type-IV spiral plate heat exchanger 13-2 and collected in the second-stage condensate collection tank 13 for preheating. No cooling water is required during the whole process.

[0075] Furthermore, the whole operation is controlled by an intelligent control system. After setting the parameters, it automatically adjusts each parameter to the optimal state to make the liquid material reach the required relative density. At the end of the operation, shut down the machine by operating in the reverse direction according to the process. Clean the equipment pipeline with the automatic cleaning system.

[0076] The above has described the present utility model in detail in combination with the embodiments with drawings. Those of ordinary skill in the art can make various variations to the present utility model according to the above description. Therefore, some details in the embodiments should not constitute a limitation to the present utility model, and the present utility model will take the scope defined by the appended claims as the protection scope.

Claims

1. A wing-type multi-effect evaporation concentration device, characterized in that, Including: A first-effect vaporization separation device that heats the liquid feed to the evaporation temperature to evaporate volatile substances, thereby achieving separation and obtaining the primary feed; it is equipped with a first-effect finned heat exchanger for evaporation compression; A second-effect evaporation separation device that further evaporates and separates the vaporized liquid; it is equipped with a coil heat exchanger for evaporation compression; A supporting device for controlling the first-effect vaporization separation device and the second-effect evaporation separation device, The supporting device includes a heater that heats the liquid feed; A spiral plate heat exchanger is provided inside the heater. One end of the spiral plate heat exchanger is docked with the other end of the first-effect finned heat exchanger, and the other end is docked with the other end of the coil heat exchanger. The residual steam of the fresh steam of the first-effect finned heat exchanger is used to heat the heater.

2. The wing type multi-effect evaporation concentration device according to claim 1, characterized in that, The first-effect vaporization separation device includes a first-effect vaporization chamber as the main body, and the following are also provided inside the first-effect vaporization chamber: A spray head for spraying the feed liquid; A first-effect finned heat exchanger is provided with a fresh steam inlet valve for controlling opening and closing, which is used to heat-exchange and heat the feed liquid for preliminary evaporation and concentration to obtain the primary feed, A first-effect vaporization pipe for outputting the primary feed.

3. The wing type multi-effect evaporation concentration device according to claim 2, characterized in that, The second-effect evaporation separation device includes a second-effect evaporation chamber as the main body, and the following are also provided inside the second-effect evaporation chamber: A second-effect spiral plate heat exchanger is docked with the first-effect vaporization pipe of the first-effect vaporization chamber to obtain the primary feed and further heat it; A coil heat exchanger is docked with the first-effect finned heat exchanger to obtain the residual steam of the fresh steam of the first-effect finned heat exchanger to further heat the primary feed; A second-effect evaporation pipe is docked with the second-effect spiral plate heat exchanger to obtain secondary steam.

4. The wing type multi-effect evaporation and concentration device according to claim 3, characterized in that, The supporting device includes: A feed component, and the feed component includes: A filter, one end of which is used to receive the liquid feed and preliminarily filter the liquid feed; A liquid delivery pump, one end of which is docked with the other end of the filter to obtain the preliminarily filtered liquid feed; A preheating coil component, one end of which is docked with the other end of the liquid delivery pump to preheat the preliminarily filtered liquid feed to obtain the preheated liquid feed; A heater, one end of which is docked with the other end of the preheating coil component, and the other end is docked with the spray port of the first-effect vaporization separation device to further heat the preheated liquid feed.

5. The wing type multi-effect evaporation concentration device according to claim 4, characterized in that, The supporting device includes: A vacuum control component for controlling the vacuum degrees of the first-effect vaporization separation device and the second-effect evaporation separation device; The vacuum control component includes a water ring vacuum pump and a vacuum storage tank connected in series in sequence; A first liquid circulation pump for controlling the opening and closing of the spray head; A second liquid circulation pump for controlling the opening and closing of the second-effect evaporation chamber.

6. The wing type multi-effect evaporation concentration device according to claim 5, characterized in that, The supporting device includes: The preheating coil component includes: A primary condensation collection tank is docked with the second-effect evaporation pipe and is provided with a first preheating coil, and one end of the first preheating coil is docked with the other end of the liquid delivery pump; A secondary condensation collection tank is docked with the second-effect evaporation pipe and is provided with a second preheating coil, and one end of the second preheating coil is docked with the other end of the first preheating coil; a type-IV spiral plate heat exchanger is also provided, and the type-IV spiral plate heat exchanger exchanges heat and cools the second-effect steam of the second-effect evaporation pipe.

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