Double-effect concentration unit

Abstract

The utility model relates to a double-effect concentration unit, and relates to the field of medicine concentration equipment. The utility model provides a double-effect concentration unit. The double-effect concentration unit comprises a condensing unit, a concentration unit and branches, one end of the branch is communicated with the liquid outlet end of the evaporation chamber, and the other end of the branch is communicated with an opening in the top of the heater; a branch and a conveying pump are arranged, so that materials can be pumped to the top of the heater from the bottom of the heater through the conveying pump and the branch for feeding, and circulating falling film concentration is realized; due to the fact that materials are directly pumped into the heater through the top of the heating chamber through the conveying pump, the liquid storage amount in the evaporation chamber is reduced, and bubbling of the impact liquid materials is reduced. Meanwhile, as the lower part of the heater has heating and liquid storage functions, the material flows from the top to the bottom in the tube nest of the heat exchanger for falling film heat exchange, the falling film heat exchange concentration of the material is facilitated, and the concentration efficiency is improved by more than 5%.

Description

Technical Field

[0001] The utility model relates to the field of medicine concentration equipment, in particular to a double-effect concentration unit. Background Art

[0002] Existing water-extracted decoctions of traditional Chinese medicine granules are available in a wide variety of varieties and require large concentration volumes. Traditional concentrators for some heat-sensitive Chinese medicines can experience significant quality fluctuations, high energy consumption, and some foaming varieties are prone to material loss. The dual-effect electric concentrator can achieve concentration below 70°C, effectively ensuring the quality stability of heat-sensitive varieties during the concentration process. Compared to traditional concentrators, it can reduce the cost per unit of evaporation and is highly adaptable to foaming varieties.

[0003] The inventors have found that the current liquid medicine circulation volume is relatively large. In a 3-ton / hour double-effect concentrator unit, when only a single-effect unit is used, a minimum circulation volume of about 1.1 tons of liquid medicine is required. When the batch production is small, the minimum paste collection volume is usually 0.4 tons, which makes the unit unusable and cannot fully exert the energy-saving effect of electric concentration. At the same time, the concentration efficiency is not optimal when using rising film concentration, and the concentration efficiency needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a double-effect concentrator unit, which can improve the concentration efficiency.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] The utility model proposes a double-effect concentrating unit, comprising: a condensing unit, a concentrating unit and a branch; the condensing unit is used to condense or heat a working medium; the concentrating unit comprises a heater and an evaporation chamber, the heater is provided with a connected feed port and a discharge port and a connected steam inlet and a steam outlet; the steam inlet is connected to the output end of the condensing unit, and the steam outlet is connected to the input end of the condensing unit; the discharge port is connected to the evaporation chamber, the feed port is connected to the liquid outlet end of the evaporation chamber, and the steam outlet end of the evaporation chamber is connected to the condensing unit; one end of the branch is connected to the liquid outlet end of the evaporation chamber, and the other end is connected to the opening at the top of the heater, and the opening is connected to the discharge port.

[0007] Optionally, the concentrator unit includes a first-effect concentrator unit and a second-effect concentrator unit that are connected, the first-effect concentrator unit includes a first-effect heater and a first-effect evaporation chamber, and the second-effect concentrator unit includes a second-effect heater and a second-effect evaporation chamber;

[0008] The branch includes a first-effect branch and a second-effect branch. The first-effect branch is provided in the first-effect concentrator unit, and the second-effect branch is provided in the second-effect concentrator unit.

[0009] Optionally, the single-effect heater is provided with a connected single-effect feed port and a connected single-effect discharge port, and a connected single-effect steam inlet and a connected single-effect steam outlet, the single-effect steam inlet is connected to the output end of the condensing unit, and the single-effect steam outlet is connected to the input end of the condensing unit; the single-effect discharge port is connected to the liquid inlet end of the single-effect evaporation chamber, the single-effect feed port is connected to the liquid outlet end of the single-effect evaporation chamber, and the steam outlet end of the single-effect evaporation chamber is respectively connected to the condensing unit and the second-effect heater;

[0010] One end of the first-effect branch is connected to the liquid outlet of the first-effect evaporation chamber, and the other end is connected to the first-effect opening on the top of the first-effect heater;

[0011] The first-effect opening is communicated with the first-effect discharge port.

[0012] Optionally, the second-effect heater is provided with a second-effect feed port and a second-effect discharge port that are connected, and a second-effect steam inlet and a second-effect steam outlet that are connected; the second-effect steam inlet is connected to the gas outlet end of the first-effect evaporation chamber, and the second-effect steam outlet is connected to the condensed water pipe; the second-effect discharge port is connected to the liquid inlet end of the second-effect evaporation chamber, the second-effect feed port is connected to the liquid outlet end of the second-effect evaporation chamber, and the steam outlet end of the second-effect evaporation chamber is connected to the condensing unit;

[0013] One end of the second-effect branch is connected to the liquid outlet of the second-effect evaporation chamber, and the other end is connected to the second-effect opening at the top of the second-effect heater;

[0014] The second-effect opening is communicated with the second-effect discharge port.

[0015] Optionally, the first-effect concentrator unit concentrates the material to generate first-effect steam, and the first-effect steam enters the second-effect heater through the steam outlet of the first-effect evaporation chamber and the second-effect steam inlet to heat the material in the second-effect heater;

[0016] Or the first-effect steam enters the condensing unit through the steam outlet end of the first-effect evaporation chamber to be condensed.

[0017] Optionally, the first-effect heater is further provided with a first-effect discharge port for discharging materials, and the second-effect heater is further provided with a second-effect discharge port for discharging materials;

[0018] The first-effect discharge port and the second-effect discharge port are communicated with a discharge pump.

[0019] Optionally, the condensing unit includes an expansion valve, a condenser, and a compressor connected in sequence; the input end of the expansion valve is connected to the first-effect steam outlet of the first-effect concentrating unit, and the output end of the expansion valve is connected to the input end of the condenser;

[0020] The input end of the compressor is communicated with the output end of the condenser, and the output end of the compressor is communicated with the first-effect steam inlet.

[0021] Optionally, the condensing unit further includes a condensed water tank, and the condensed water outlet of the compressor is connected to the condensed water tank.

[0022] Optionally, the first-effect branch is provided with a first-effect valve, and the second-effect branch is provided with a second-effect valve.

[0023] Optionally, a first valve group is provided on the pipeline connecting the first-effect feed inlet and the liquid outlet of the first-effect evaporation chamber;

[0024] A second valve group is provided on the pipeline connecting the second-effect feed inlet and the liquid outlet end of the second-effect evaporation chamber.

[0025] The beneficial effects of the embodiments of the present utility model are:

[0026] The utility model proposes a double-effect concentrator unit, which, by setting a branch and a delivery pump, can also be pumped from the bottom of the heater to the top of the heater through the delivery pump and the branch for feeding, thereby realizing circulating falling film concentration; since the material is directly pumped into the heater through the top of the heating chamber by the delivery pump, the amount of liquid stored in the evaporation chamber is reduced, the impact of the liquid material on the foaming is reduced, and it is beneficial to the concentration of the foaming variety; at the same time, since the lower part of the heater has heating and liquid storage functions, the material flows from the top to the bottom in the tubes of the heat exchanger for falling film heat exchange, which is beneficial to the falling film heat exchange concentration of the material and improves the concentration efficiency by more than 5%; at the same time, the material is stored in the tubes of the heat exchanger, the material is kept heated, and the feed temperature is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of a concentrating unit according to an embodiment of the present utility model;

[0029] Figure 2 This is a schematic diagram of a double-effect concentrator unit according to an embodiment of the present utility model.

[0030] Icons: 010-double-effect concentrator unit; 100-concentrator unit; 110-heater; 111-single-effect heater; 112-second-effect heater; 120-evaporation chamber; 121-single-effect evaporation chamber; 122-second-effect evaporation chamber; 123-feed pipe; 130-first valve group; 140-second valve group; 150-condensate pipe; 200-branch; 210-single-effect branch; 211-single-effect valve; 220-second-effect branch; 221-second-effect valve; 300-condensing unit; 310-expansion valve; 320-condenser; 321-condensate outlet; 330-compressor; 400-discharge pump; 500-delivery pump; 510-single-effect delivery pump; 520-second-effect delivery pump. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0036] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] In this embodiment, a drug concentration device is proposed, including a double-effect concentrator unit 010, which can achieve steady-state operation of continuous concentration and paste collection without stopping or adding water during the concentration of continuous materials; at the same time, it has high heat exchange efficiency, which is conducive to concentration.

[0038] Among them, the drug concentration equipment proposed by the utility model can be suitable for materials that are prone to foaming during the concentration process.

[0039] Please refer to Figure 1 The double-effect concentrating unit 010 proposed in this embodiment includes: a condensing unit 300, a concentrating unit 100 and a branch 200; the condensing unit 300 is used to condense or heat the working medium; the concentrating unit 100 includes a heater 110 and an evaporation chamber 120, the heater 110 is provided with a connected feed port and a discharge port, as well as a connected steam inlet and a steam outlet; the steam inlet is connected to the output end of the condensing unit 300, and the steam outlet is connected to the input end of the condensing unit 300; the discharge port is connected to the evaporation chamber 120, the feed port is connected to the liquid outlet end of the evaporation chamber 120, and the gas outlet end of the evaporation chamber 120 is connected to the condensing unit 300; one end of the branch 200 is connected to the liquid outlet end of the evaporation chamber 120, and the other end is connected to the opening at the top of the heater 110, the opening is connected to the discharge port, and a delivery pump 500 is provided on the branch 200.

[0040] It can be understood that the material is pumped into the heater 110 of the concentrator unit 100, and the condensing unit 300 heats the working fluid. The heated working fluid enters the heater 110 through the steam inlet and heats the material in the heater 110. After the working fluid is heated, it returns to the condensing unit 300 through the steam outlet for reheating. The heated evaporated material enters the evaporation chamber 120 through the discharge port. The evaporation chamber 120 evaporates and concentrates the material. When the evaporation chamber 120 concentrates the material, the material evaporates and generates steam. The steam returns to the condensing unit 300 from the outlet of the evaporation chamber 120 for condensation. This achieves a thermodynamic cycle of the working fluid and preliminary evaporation and concentration of the material.

[0041] Furthermore, the branch 200 connects the liquid outlet of the evaporation chamber 120 and the top of the heater 110. The material is pumped from the bottom of the heater 110 to the top of the heater 110 by the delivery pump 500 through the branch 200 for feeding. Part of the liquid flows downward along the tube wall inside the heater 110 by its own weight, and part of the liquid is evaporated by heat to become vapor liquid. The vapor liquid rises and evaporates by heat and mass transfer with the liquid at the tube sheet of the tube, and enters the evaporation chamber 120 through the outlet of the heater 110, and is concentrated and evaporated in the evaporation chamber 120; thus, cyclic concentration is carried out.

[0042] It can be understood that by setting up the branch 200, the material is pumped from the bottom of the heater 110 to the top of the heater 110 through the delivery pump 500 and the branch 200 for feeding, thereby realizing circulating falling film concentration; since the material is pumped into the heater 110 directly through the top of the heating chamber by the delivery pump 500, the amount of liquid stored in the evaporation chamber 120 can be reduced, reducing the foaming of the impact liquid material, which is beneficial to the concentration of the foaming variety; at the same time, since the lower part of the heater 110 has heating and liquid storage functions, the material flows from the top to the bottom in the tubes of the heat exchanger for falling film heat exchange, which is beneficial to the falling film heat exchange concentration of the material and improves the concentration efficiency by more than 5%; at the same time, the material is stored in the tubes of the heat exchanger, and the material is kept heated to ensure the feed temperature.

[0043] In this embodiment, please refer to Figure 2 The concentrator unit 100 includes a first-effect concentrator unit and a second-effect concentrator unit that are connected. The first-effect concentrator unit includes a first-effect heater 111 and a first-effect evaporator chamber 121, and the second-effect concentrator unit includes a second-effect heater 112 and a second-effect evaporator chamber 122. Correspondingly, the branch 200 includes a first-effect branch 210 and a second-effect branch 220. The first-effect branch 210 is arranged in the first-effect concentrator unit, and the second-effect branch 220 is arranged in the second-effect concentrator unit. A first-effect delivery pump 510 is arranged on the first-effect branch 210, and a second-effect delivery pump 520 is arranged on the second-effect branch 220.

[0044] As can be understood, this makes the pharmaceutical concentrator suitable for staged concentration of heat-sensitive materials. This is because the temperature of the material heated by the first-effect concentrator unit 100 can be controlled below 90°C, and the temperature during evaporation and concentration is controlled at approximately 65°C. Furthermore, the temperature of the material evaporated and concentrated by the second-effect concentrator unit 100 is controlled at approximately 50°C, ensuring stable system operation. Compared to traditional concentrators, this system offers more stable and lower temperatures, making it more suitable for evaporating and concentrating heat-sensitive materials.

[0045] In this embodiment, the single-effect heater 111 includes a body, a first-effect feed port and a first-effect discharge port that are connected, a first-effect steam inlet and a first-effect steam outlet that are connected, and a first-effect opening arranged on the top.

[0046] Among them, a cavity is provided inside the main body, and a tube is provided inside the cavity. The top of the tube is a first-effect feed port, and the bottom of the tube is a first-effect discharge port, and one of the first-effect openings is connected to the top of the tube; thereby, the material fed into the first-effect branch 210 undergoes liquid and steam heat exchange at the tube sheet of the heat exchanger, which is beneficial to the concentration of the material.

[0047] A first-effect steam inlet is provided at the top of the cavity, and a first-effect steam outlet is provided at the bottom; thereby, steam is introduced into the cavity and the material in the tube array is heated.

[0048] In this embodiment, the first-effect steam inlet is connected to the output end of the condensing unit 300; the first-effect steam outlet is connected to the input end of the condensing unit 300; the first-effect discharge port is connected to the first-effect evaporation chamber 121, and the first-effect feed port is connected to the liquid outlet end of the first-effect evaporation chamber 121.

[0049] In this embodiment, the first-effect evaporation chamber 121 includes a main body and a feed pipe 123 connected to the main body. The liquid outlet at the bottom of the first-effect evaporation chamber 121 is connected to the first valve group 130, the first-effect transfer pump 510, and the first-effect feed port. The liquid inlet on the side wall of the first-effect evaporation chamber 121 is connected to the first-effect discharge port. The steam outlet of the first-effect evaporation chamber 121 is connected to the input of the condenser 320 and the second-effect steam inlet of the second-effect heater 112.

[0050] It is understood that the material in the first-effect heater 111 flows into the first-effect evaporation chamber 121 for evaporation and concentration. Part of the material evaporates into first-effect steam, which enters the second-effect heater 112 through the outlet of the first-effect evaporation chamber 121 and the second-effect steam inlet to heat the material in the second-effect heater 112. / Or the first-effect steam enters the condensing unit 300 through the outlet of the first-effect evaporation chamber 121 for condensation. The remaining material is discharged from the first-effect outlet of the first-effect heater 111 and enters the first-effect heater 111 through the first-effect opening at the top of the first-effect heater 111 through the first-effect branch line 210 and the first-effect transfer pump 510 to undergo recirculation and falling film concentration.

[0051] In this embodiment, a first valve group 130 and a first-effect delivery pump 510 are provided on a pipeline connecting the first-effect feed inlet and the liquid outlet of the first-effect evaporation chamber 121 .

[0052] In this embodiment, one end of the first-effect branch 210 is connected to the liquid outlet of the first-effect evaporation chamber 121 , and the other end is connected to the top of the first-effect heater 111 .

[0053] The first-effect branch 210 is provided with a first-effect valve 211 , and the first-effect valve 211 is used to close or open the first-effect branch 210 .

[0054] It can be understood that part of the material in the single-effect heater 111 is fed from the single-effect opening at the top of the single-effect heater 111 through the single-effect delivery pump 510 and the single-effect branch 210, and the material liquid flows downward along the inner wall of the tube inside the single-effect heater 111 by its own weight to perform falling film heat exchange, and part of the material liquid is evaporated into vaporous material liquid by heat, and the vaporous material liquid rises and evaporates by heat and mass transfer with the liquid at the tube sheet of the tube, and enters the single-effect evaporation chamber 121; part of the material in the single-effect heater 111 is fed to the top of the single-effect heater 111 through the single-effect discharge port at the bottom through the first valve group 130, the single-effect delivery pump 510, and the single-effect branch 210, thereby performing cyclic concentration.

[0055] In this embodiment, the second-effect heater 112 includes a body, a second-effect feed port and a second-effect discharge port that are connected, a second-effect steam inlet and a second-effect steam outlet that are connected, and a second-effect opening arranged on the top.

[0056] Among them, a cavity is provided inside the main body, and a tube is provided inside the cavity. The top of the tube is the second-effect feed port, and the bottom of the tube is the second-effect discharge port, wherein the second-effect opening is connected with the top of the tube; thereby, the material fed into the second-effect branch 220 undergoes liquid and steam heat exchange at the tube plate of the heat exchanger, which is beneficial to the concentration of the material.

[0057] Among them, a second-effect steam inlet is set at the top of the cavity, and a second-effect steam outlet is set at the bottom; thereby, the first-effect steam is introduced into the cavity and the material in the tube array is heated.

[0058] In this embodiment, the second-effect steam inlet is connected to the gas outlet end of the first-effect evaporation chamber 121, so that the first-effect steam generated by the evaporation of the material in the first-effect evaporation chamber 121 can be used as the steam heating source of the second-effect heater 112; the second-effect steam outlet is connected to the condensed water pipe 150; the second-effect discharge port is connected to the liquid inlet end of the second-effect evaporation chamber 122, and the second-effect feed port is connected to the input end of the condenser 320.

[0059] In this embodiment, the second-effect evaporation chamber 122 includes a main body and a feed pipe 123 connected to the main body. The liquid outlet at the bottom of the second-effect evaporation chamber 122 is connected to the condensate pipe 150; the liquid inlet on the side wall of the second-effect evaporation chamber 122 is connected to the second-effect discharge port; and the gas outlet of the second-effect evaporation chamber 122 is connected to the input end of the condenser 320.

[0060] It is understood that the first-effect steam generated by the evaporation of the material in the first-effect evaporation chamber 121 enters the second-effect heater 112 through the gas outlet of the first-effect evaporation chamber 121 and the second-effect steam inlet, and serves as the steam heating source for the second-effect heater 112 to heat the material in the second-effect heater 112. A portion of the material in the second-effect heater 112 is heated and enters the second-effect evaporation chamber 122, where it evaporates into second-effect steam and enters the condenser 320 for condensation. A portion of the material in the second-effect heater 112 is then fed through the second-effect outlet at the bottom, through the second valve assembly 140, the second-effect transfer pump 520, and the second-effect branch line 220 to the top of the second-effect heater 112, thereby performing a cyclic concentration process.

[0061] In this embodiment, a second valve group 140 is provided on the pipeline connecting the second-effect feed inlet and the liquid outlet of the second-effect evaporation chamber 122 .

[0062] In this embodiment, two ends of the second-effect branch 220 are connected to the liquid outlet of the second-effect evaporation chamber 122 , and the other two ends are connected to the top of the second-effect heater 112 .

[0063] The second-effect branch 220 is provided with a second-effect valve 221 , which is used to close or open the second-effect branch 220 .

[0064] It can be understood that the material in the second-effect heater 112 is fed from the second-effect opening at the top of the second-effect heater 112 through the second-effect branch 220 and the second-effect delivery pump 520, and the material liquid flows downward along the inner wall of the tube inside the second-effect heater 112 by its own weight to achieve falling film heat exchange and concentration. Part of the material liquid is evaporated into vaporous material liquid by heat, and the vaporous material liquid rises and evaporates by heat and mass transfer with the liquid at the tube sheet of the tube, and enters the second-effect evaporation chamber 122; the remaining part of the material in the second-effect heater 112 is fed to the top of the second-effect heater 112 through the discharge port at its bottom; thereby, cyclic concentration is carried out.

[0065] In this embodiment, the first-effect heater 111 is further provided with a first-effect discharge port for discharging materials, and the second-effect heater 112 is further provided with a second-effect discharge port for discharging materials; the first-effect discharge port and the second-effect discharge port are connected to the discharge pump 400.

[0066] It can be understood that the discharge pump 400 is used to pump in or out materials.

[0067] In this embodiment, the condensing unit 300 includes an expansion valve 310, a condenser 320, and a compressor 330, which are connected in sequence. The input of the expansion valve 310 is connected to the first-effect steam outlet of the first-effect concentrating unit, and the output of the expansion valve 310 is connected to the input of the condenser 320. The input of the compressor 330 is connected to the output of the condenser 320, and the output of the compressor 330 is connected to the first-effect steam inlet.

[0068] The expansion valve 310 is used to throttle the medium-temperature and high-pressure liquid refrigerant into low-temperature and low-pressure wet steam; the compressor 330 is used to convert the low-pressure gas into high-pressure gas.

[0069] In this embodiment, the condensing unit 300 further includes a condensed water tank, and the condensed water outlet 321 is connected to the condensed water tank.

[0070] The working principle of the double-effect concentrator unit 010 proposed in this utility model is:

[0071] The liquid in the condenser 320 is converted into a high-temperature and high-pressure steam working medium through the expansion valve 310 and the compressor 330; the heated steam working medium is transported to the first-effect heater 111 through the first-effect steam inlet, and the steam working medium releases heat to heat the material in the first-effect heater 111. The steam working medium condenses into liquid after releasing heat and returns to the condensing unit 300 from the first-effect steam outlet of the first-effect heater 111 for further expansion and compression.

[0072] The first-effect concentrator unit and the second-effect concentrator unit simultaneously perform circulating falling film concentration on the material until the material reaches the expected concentration; and the concentrated material is pumped out through the discharge pump 400.

[0073] At the same time, the condensed water generated by the condenser 320 is discharged into the condensed water tank through the condensed water outlet 321; the first-effect steam is converted into liquid condensed water after heat exchange in the second-effect heater 112, and is discharged into the condensed water tank through the condensed water tank.

[0074] In summary, the present embodiment proposes a double-effect concentrator unit 010, in which the material is pumped from the bottom of the heater 110 to the top of the heater 110 through the delivery pump 500 and the branch 200 for feeding, thereby realizing circulating falling film concentration; since the material is directly pumped into the heater 110 through the top of the heating chamber by the delivery pump 500, the amount of liquid stored in the evaporation chamber 120 is reduced, which reduces the foaming of the impact liquid material and is beneficial to the concentration of the foaming variety; at the same time, since the lower part of the heater 110 has heating and liquid storage functions, the material flows from the top to the bottom in the tubes of the heat exchanger for falling film heat exchange, which is beneficial to the falling film heat exchange concentration of the material and improves the concentration efficiency by more than 5%; at the same time, the material is stored in the tubes of the heat exchanger, and the material is kept heated, thereby ensuring the feed temperature.

[0075] Furthermore, the heater 110 adopts falling film evaporation, which can improve the concentration efficiency by more than 5%.

[0076] Furthermore, the minimum circulation volume of the improved double-effect concentrator unit 010 is reduced by 40%-60%, which is beneficial to small-batch production.

[0077] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A double-effect concentrator unit, characterized in that: include: A condensing unit, which is used to condense or heat the working medium; A concentrator unit, comprising a heater and an evaporation chamber, wherein the heater is provided with a connected feed port and a connected discharge port, and a connected steam inlet and a connected steam outlet; The steam inlet is connected to the output end of the condensing unit, and the steam outlet is connected to the input end of the condensing unit; The discharge port is in communication with the evaporation chamber, the feed port is in communication with the liquid outlet of the evaporation chamber, and the steam outlet of the evaporation chamber is in communication with the condensing unit; A branch line, one end of which is connected to the liquid outlet of the evaporation chamber, and the other end of which is connected to the opening at the top of the heater, wherein the opening is connected to the discharge port, and a delivery pump is provided on the branch line.

2. The double-effect concentrator unit according to claim 1, characterized in that: The concentrator unit includes a first-effect concentrator unit and a second-effect concentrator unit connected to each other, the first-effect concentrator unit includes a first-effect heater and a first-effect evaporation chamber, and the second-effect concentrator unit includes a second-effect heater and a second-effect evaporation chamber; The branch includes a first-effect branch and a second-effect branch. The first-effect branch is arranged in the first-effect concentrator unit, and the second-effect branch is arranged in the second-effect concentrator unit. A first-effect delivery pump is arranged on the first-effect branch, and a second-effect delivery pump is arranged on the second-effect branch.

3. The double-effect concentrator unit according to claim 2, characterized in that: The first-effect heater is provided with a first-effect feed port and a first-effect discharge port, as well as a first-effect steam inlet and a first-effect steam outlet, the first-effect steam inlet is connected to the output end of the condensing unit, and the first-effect steam outlet is connected to the input end of the condensing unit; the first-effect discharge port is connected to the liquid inlet end of the first-effect evaporation chamber, the first-effect feed port is connected to the liquid outlet end of the first-effect evaporation chamber, and the steam outlet end of the first-effect evaporation chamber is respectively connected to the condensing unit and the second-effect heater; One end of the first-effect branch is connected to the liquid outlet of the first-effect evaporation chamber, and the other end is connected to the first-effect opening on the top of the first-effect heater; The first-effect opening is communicated with the first-effect discharge port.

4. The double-effect concentrator unit according to claim 3, characterized in that: The second-effect heater is provided with a second-effect feed port and a second-effect discharge port, as well as a second-effect steam inlet and a second-effect steam outlet; the second-effect steam inlet is connected to the steam outlet end of the first-effect evaporation chamber, and the second-effect steam outlet is connected to the condensed water pipe; the second-effect discharge port is connected to the liquid inlet end of the second-effect evaporation chamber, the second-effect feed port is connected to the liquid outlet end of the second-effect evaporation chamber, and the steam outlet end of the second-effect evaporation chamber is connected to the condensing unit; One end of the second-effect branch is connected to the liquid outlet of the second-effect evaporation chamber, and the other end is connected to the second-effect opening at the top of the second-effect heater; The second-effect opening is communicated with the second-effect discharge port.

5. The double-effect concentrator unit according to claim 4, characterized in that: The first-effect concentrator unit concentrates the material to generate first-effect steam, and the first-effect steam enters the second-effect heater through the steam outlet of the first-effect evaporation chamber and the second-effect steam inlet to heat the material in the second-effect heater; Or the first-effect steam enters the condensing unit through the steam outlet end of the first-effect evaporation chamber to be condensed.

6. The double-effect concentrator unit according to claim 4, characterized in that: The first-effect heater is further provided with a first-effect discharge port for discharging materials, and the second-effect heater is further provided with a second-effect discharge port for discharging materials; The first-effect discharge port and the second-effect discharge port are communicated with a discharge pump.

7. The double-effect concentrator unit according to claim 4, characterized in that: The condensing unit includes an expansion valve, a condenser and a compressor connected in sequence; the input end of the expansion valve is connected to the first-effect steam outlet of the first-effect concentrating unit, and the output end of the expansion valve is connected to the input end of the condenser; The input end of the compressor is communicated with the output end of the condenser, and the output end of the compressor is communicated with the first-effect steam inlet.

8. The double-effect concentrator unit according to claim 7, characterized in that: The condensing unit further includes a condensed water tank, and the condensed water outlet of the compressor is communicated with the condensed water tank.

9. The double-effect concentrator unit according to claim 4, characterized in that: The first-effect branch is provided with a first-effect valve, and the second-effect branch is provided with a second-effect valve.

10. The double-effect concentrator unit according to claim 4, characterized in that: A first valve group is provided on the pipeline connecting the first-effect feed inlet and the liquid outlet of the first-effect evaporation chamber; A second valve group is provided on the pipeline connecting the second-effect feed inlet and the liquid outlet end of the second-effect evaporation chamber.

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