Concentrator with annular line pipe network

Abstract

The utility model discloses a concentrator with an annular line pipe network, which comprises an equipment bracket, a heater and an evaporating tank which are sequentially communicated are fixedly arranged on the equipment bracket, an annular pipe is fixedly arranged at the lower end of the heater, and a booster pump is arranged at one end of the annular pipe; the lower ends of the heaters are communicated with the annular pipe; a feeding pipe and a cleaning pipe are fixedly arranged on the evaporating tank; the lower ends of the feeding pipe and the cleaning pipe are communicated with the annular pipe; a gas guide pipe is arranged on the evaporation tank, a first horizontal condenser is fixedly arranged at the lower end of the gas guide pipe, a second horizontal condenser is arranged at the lower end of the first horizontal condenser, a connecting bent pipe is arranged between the first horizontal condenser and the second horizontal condenser, and a liquid receiving tank is arranged at the lower end of an outlet of the second horizontal condenser. And a negative pressure pump is arranged at one end of the liquid receiving tank. According to the technical scheme, the structural design is reasonable, the structure is simple, pipelines are convenient to clean, the condenser is convenient to maintain, heat exchange efficiency is high, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of concentrators, in particular to a concentrator with a ring-shaped pipeline network. Background Art

[0002] The triple-effect concentrator is applicable to the concentration of materials such as traditional Chinese medicine, western medicine, starch sugar, food and dairy products, and is particularly applicable to the low-temperature vacuum concentration of heat-sensitive materials.

[0003] The existing structure of the triple-effect concentrator still has deficiencies: (1) The condenser of the existing triple-effect concentrator is generally arranged vertically (vertically). The vertical condenser is slender, small in volume, and low in heat exchange efficiency. Due to its high top height, maintenance and repair are troublesome; (2) There are many pipelines in the existing triple-effect concentrator, including feed pipes, discharge pipes, cleaning pipes, etc. The pipeline structure is complex and cleaning is troublesome; (3) The density meter of the existing triple-effect concentrator is installed on the first-effect circulation pipe or the second-effect circulation pipe. The installation of the density meter is troublesome and its practicability is poor. Summary of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a concentrator with a ring-shaped pipeline network, which has a reasonable structural design, a simple structure, convenient pipeline cleaning, convenient condenser maintenance, high heat exchange efficiency and good practicability.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: A concentrator with a ring-shaped pipeline network, including an equipment support, on which a heater and an evaporation tank are fixedly arranged and are connected in sequence. A ring-shaped pipe is fixedly arranged at the lower end of the heater, and a booster pump is arranged at one end of the ring-shaped pipe; the lower ends of the heaters are all communicated with the ring-shaped pipe;

[0006] An inlet pipe and a cleaning pipe are fixedly arranged on the evaporation tank, and the lower ends of the inlet pipe and the cleaning pipe are both communicated with the ring-shaped pipe;

[0007] An air guide pipe is arranged on the evaporation tank, a first horizontal condenser is fixedly arranged at the lower end of the air guide pipe, a second horizontal condenser is arranged at the lower end of the first horizontal condenser, a connecting elbow is arranged between the first horizontal condenser and the second horizontal condenser, a liquid receiving tank is arranged at the lower end of the outlet of the second horizontal condenser, and a negative pressure pump is arranged at one end of the liquid receiving tank.

[0008] The utility model is further arranged as: The heater includes a first-effect heater, a second-effect heater and a third-effect heater. The evaporation tank includes a first-effect evaporation tank, a second-effect evaporation tank and a third-effect evaporation tank. A first-effect inlet pipe and a first-effect cleaning pipe are fixedly arranged on the first-effect evaporation tank. A second-effect inlet pipe and a second-effect cleaning pipe are fixedly arranged on the second-effect evaporation tank. A third-effect inlet pipe and a third-effect cleaning pipe are fixedly arranged on the third-effect evaporation tank;

[0009] The lower ends of the first-effect heater, the second-effect heater, the third-effect heater, the first-effect feed pipe, the first-effect cleaning pipe, the second-effect feed pipe, the second-effect cleaning pipe, the third-effect feed pipe and the third-effect cleaning pipe are all communicated with the annular pipe.

[0010] The present utility model is further arranged such that: a densitometer and a plurality of control valves are arranged on the annular pipe.

[0011] The present utility model is further arranged such that: a first connecting pipe is arranged on the negative pressure pump, and the end of the first connecting pipe departing from the negative pressure pump is fixedly connected to the bottom of the liquid receiving tank; a second connecting pipe is fixedly arranged at the rear end of the liquid receiving tank, and a vacuum pump is fixedly arranged at the end of the second connecting pipe departing from the liquid receiving tank.

[0012] The present utility model is further arranged such that: a first gas guide pipe is fixedly arranged at the upper end of the first-effect evaporation tank, a second gas guide pipe is fixedly arranged at the upper end of the second-effect evaporation tank, a third gas guide pipe is fixedly arranged at the upper end of the third-effect evaporation tank, a gas guide connecting pipe is fixedly arranged between the first gas guide pipe and the third gas guide pipe, and the second gas guide pipe is communicated with the gas guide connecting pipe.

[0013] The present utility model is further arranged such that: a first upper circulation pipe is fixedly arranged between the upper end of the first-effect heater and the side surface of the first-effect evaporation tank, and a first lower circulation pipe is fixedly arranged between the lower end of the first-effect evaporation tank and the lower end of the first-effect heater; a second upper circulation pipe is fixedly arranged between the upper end of the second-effect heater and the side surface of the second-effect evaporation tank, and a second lower circulation pipe is fixedly arranged between the lower end of the second-effect evaporation tank and the lower end of the second-effect heater; a third upper circulation pipe is fixedly arranged between the upper end of the third-effect heater and the side surface of the third-effect evaporation tank, and a third lower circulation pipe is fixedly arranged between the lower end of the third-effect evaporation tank and the lower end of the third-effect heater.

[0014] The present utility model is further arranged such that: the first horizontal condenser is a four-pass condenser, and the second horizontal condenser is a two-pass condenser.

[0015] The beneficial effects of the present utility model are as follows: compared with the prior art, the structure design of the present utility model is reasonable. The redundant gas sequentially enters the first horizontal condenser and the second horizontal condenser. The first horizontal condenser and the second horizontal condenser condense the steam into liquid and enter the liquid receiving tank. The liquid in the liquid receiving tank is discharged through the negative pressure pump, thereby realizing the evaporation and recovery of the moisture (solvent) in the material and increasing the material concentration. The whole process is carried out under a negative pressure state, and the function of the vacuum pump is to provide a vacuum environment for the whole system.

[0016] The utility model adopts an annular pipeline network structure, which has a simple structure and facilitates the cleaning of pipelines around the concentrator; the densitometer can be installed on the annular pipe, with convenient installation and good stability; the annular pipe has good material guiding effect, and can continuously feed or discharge materials under certain conditions;

[0017] The condenser adopts a horizontal structure: the first-stage condenser adopts a four-pass structure, and the second-stage condenser adopts a two-pass structure. The slender condenser with the same area can accelerate the flow of circulating water in the pipe, and the heat transfer efficiency is increased by 20% compared with the existing vertical condenser. The rapid flow of circulating water can prevent scale and biofilm formation; in addition, the pipe boxes at both ends of the horizontal condenser can be easily disassembled, facilitating maintenance and repair, and having good practicability.

[0018] The following further describes the utility model with reference to the accompanying drawings of the specification and specific embodiments. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the first embodiment of the utility model;

[0020] Figure 2 It is a rear view schematic diagram of the first embodiment of the utility model;

[0021] Figure 3 It is a right view schematic diagram of the first embodiment of the utility model;

[0022] Figure 4 It is a schematic structural diagram of the second embodiment of the utility model;

[0023] Figure 5 It is a rear view schematic diagram of the second embodiment of the utility model;

[0024] Figure 6 It is a right view schematic diagram of the second embodiment of the utility model;

[0025] Figure 7 It is a schematic structural diagram of the third embodiment of the utility model;

[0026] Figure 8 It is a rear view schematic diagram of the third embodiment of the utility model;

[0027] Figure 9 It is a right view schematic diagram of the third embodiment of the utility model. Detailed Embodiments

[0028] In the description of this embodiment, it should be noted that terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] Embodiment 1

[0030] See Figures 1 to 3 , a concentrator with a ring-shaped pipeline network disclosed by the present invention includes an equipment support 1, on which a heater and an evaporation tank are fixedly arranged in sequence and communicated with each other. A ring pipe 8 is fixedly arranged at the lower end of the heater. A booster pump 9 is arranged at one end of the ring pipe 8; the lower ends of the heater are all communicated with the ring pipe 8;

[0031] An inlet pipe and a cleaning pipe are fixedly arranged on the evaporation tank, and the lower ends of the inlet pipe and the cleaning pipe are both communicated with the ring pipe 8;

[0032] An air guide pipe is arranged on the evaporation tank. A first horizontal condenser 10 is fixedly arranged at the lower end of the air guide pipe. A second horizontal condenser 11 is arranged at the lower end of the first horizontal condenser 10. A connecting elbow 12 is arranged between the first horizontal condenser 10 and the second horizontal condenser 11. A liquid receiving tank 13 is arranged at the lower end of the outlet of the second horizontal condenser 11. A negative pressure pump 14 is arranged at one end of the liquid receiving tank 13.

[0033] Preferably, the heater includes a first-effect heater 2, and the evaporation tank includes a first-effect evaporation tank 3. A first-effect inlet pipe 31 and a first-effect cleaning pipe 32 are fixedly arranged on the first-effect evaporation tank 3. The lower ends of the first-effect heater 2, the first-effect inlet pipe 31, and the first-effect cleaning pipe 32 are all communicated with the ring pipe 8.

[0034] A densitometer and several control valves are arranged on the ring pipe 8.

[0035] A first connecting pipe 15 is arranged on the negative pressure pump 14, and the end of the first connecting pipe 15 away from the negative pressure pump is fixedly connected to the bottom of the liquid receiving tank 13.

[0036] A first air guide pipe 33 is fixedly arranged at the upper end of the first-effect evaporation tank 3, and the first-effect evaporation tank 3 is communicated with the first horizontal condenser 10 through the first air guide pipe 33.

[0037] A first upper circulation pipe 19 is fixedly arranged between the upper end of the first-effect heater 2 and the side surface of the first-effect evaporation tank 3, and a first lower circulation pipe 20 is fixedly arranged between the lower end of the first-effect evaporation tank 3 and the lower end of the first-effect heater 2.

[0038] The first horizontal condenser 10 is a four-pass condenser, and the second horizontal condenser 11 is a two-pass condenser.

[0039] The pipelines between the components in this embodiment are fixed by threaded connection or by welding; the equipment bracket 1 and each component are fixed by bolt connection or by welding.

[0040] In practical applications, the concentrator of the present utility model with a ring-shaped pipeline network is used for concentrating and evaporating solvents. Steam is introduced into the first-effect heater to heat the materials in the first-effect heater. The generated steam enters the first-effect evaporation tank, where gas-liquid separation is carried out; the excess gas sequentially enters the first horizontal condenser and the second horizontal condenser. The first horizontal condenser and the second horizontal condenser condense the steam into liquid and enter the liquid receiving tank. The liquid in the liquid receiving tank is discharged by a negative pressure pump, thereby realizing the evaporation and recovery of the water (solvent) in the materials and increasing the material concentration. The whole process is carried out under a negative pressure state, and the function of the vacuum pump is to provide a vacuum environment for the whole system.

[0041] The structure of the present utility model is reasonably designed and simple. The ring-shaped pipeline network structure makes it convenient to clean the pipelines around the concentrator; the densitometer can be installed on the ring-shaped pipe, with convenient installation and good stability; the ring-shaped pipe has good material guiding effect, and continuous feeding or continuous discharging can be carried out under certain conditions.

[0042] The condenser adopts a horizontal structure: the first-stage condenser adopts a four-pass structure, and the second-stage condenser adopts a two-pass structure. The slender condenser under the same area can accelerate the flow of the circulating water in the pipe, and the heat transfer efficiency is increased by 20% compared with the existing vertical condenser. The rapid flow of the circulating water can prevent scaling and the formation of biofilms; in addition, the pipe boxes at both ends of the horizontal condenser can be easily disassembled, which is convenient for maintenance and overhaul, and has good practicability.

[0043] Embodiment 2

[0044] See Figures 4 to 6This embodiment is an improvement on the technical solution of the above-mentioned embodiment 1. The above-mentioned embodiment 1 is a single-effect concentrator with a ring-shaped line pipe network, and this embodiment 2 is a double-effect concentrator with a ring-shaped line pipe network. A double-effect heater 4, a double-effect evaporator 5, a vacuum pump 17 and matching pipe fittings are added to the technical solution of the first embodiment. The difference lies in that: the heater includes a single-effect heater 2 and a double-effect heater 4, the evaporator includes a single-effect evaporator 3 and a double-effect evaporator 5, the single-effect evaporator 3 is fixedly provided with a single-effect feed pipe 31 and a single-effect cleaning pipe 32, the double-effect evaporator 5 is fixedly provided with a double-effect feed pipe 51 and a double-effect cleaning pipe 52, and the lower ends of the single-effect heater 2, the double-effect heater 4, the single-effect feed pipe 31, the single-effect cleaning pipe 32, the double-effect feed pipe 51 and the double-effect cleaning pipe 52 are all connected to the annular pipe 8.

[0045] The negative pressure pump 14 is provided with a first connecting pipe 15, which is connected and fixed to the bottom of the liquid receiving tank 13 away from the negative pressure pump end; the rear end of the liquid receiving tank 13 is fixedly provided with a second connecting pipe 16, which is fixedly provided with a vacuum pump 17 away from the liquid receiving tank end.

[0046] A first air guide pipe 33 is fixedly disposed on the upper end of the first-effect evaporation tank 3, a second air guide pipe 53 is fixedly disposed on the upper end of the second-effect evaporation tank 5, an air guide connecting pipe is fixedly disposed between the first air guide pipe 33 and the second air guide pipe 53, and the second air guide pipe 53 is connected to the air guide connecting pipe. The second air guide pipe 53 is connected to the first horizontal condenser 10.

[0047] A first upper circulation pipe 19 is fixedly arranged between the upper end of the first-effect heater 2 and the side of the first-effect evaporation tank 3, and a first lower circulation pipe 20 is fixedly arranged between the lower end of the first-effect evaporation tank 3 and the lower end of the first-effect heater 2; a second upper circulation pipe 21 is fixedly arranged between the upper end of the second-effect heater 4 and the side of the second-effect evaporation tank 5, and a second lower circulation pipe 22 is fixedly arranged between the lower end of the second-effect evaporation tank 5 and the lower end of the second-effect heater 4.

[0048] In actual application, steam is passed through the first-effect heater to heat the material in the first-effect heater, and the produced steam enters the first-effect evaporator, where gas-liquid separation is carried out; secondary steam enters the second-effect heater to heat the material in the second-effect heater, and the produced steam enters the second-effect evaporator, where gas-liquid separation is carried out; excess gas enters the first horizontal condenser and the second horizontal condenser in turn, and the first horizontal condenser and the second horizontal condenser condense the steam into liquid and enter the liquid receiving tank, which is discharged through a negative pressure pump, thereby realizing the evaporation and recovery of the moisture (solvent) in the material and increasing the material concentration. The whole process is carried out under negative pressure, and the function of the vacuum pump is to provide a vacuum environment for the entire system.

[0049] Example 3

[0050] Refer to Figures 7 to 9 , this embodiment is an improvement on the technical solution of the above-mentioned Embodiment 2. The above-mentioned Embodiment 2 is a double-effect concentrator with a ring-shaped pipeline network, and this Embodiment 3 is a triple-effect concentrator with a ring-shaped pipeline network. A triple-effect heater 6, a triple-effect evaporation tank 7 and supporting pipe fittings are added to the technical solution of Embodiment 2. The differences are as follows: The heater includes a first-effect heater 2, a second-effect heater 4 and a triple-effect heater 6. The evaporation tank includes a first-effect evaporation tank 3, a second-effect evaporation tank 5 and a triple-effect evaporation tank 7. A first-effect feed pipe 31 and a first-effect cleaning pipe 32 are fixedly arranged on the first-effect evaporation tank 3. A second-effect feed pipe 51 and a second-effect cleaning pipe 52 are fixedly arranged on the second-effect evaporation tank 5. A triple-effect feed pipe 71 and a triple-effect cleaning pipe 72 are fixedly arranged on the triple-effect evaporation tank 7;

[0051] The lower ends of the first-effect heater 2, the second-effect heater 4, the triple-effect heater 6, the first-effect feed pipe 31, the first-effect cleaning pipe 32, the second-effect feed pipe 51, the second-effect cleaning pipe 52, the triple-effect feed pipe 71 and the triple-effect cleaning pipe 72 are all connected to the annular pipe 8.

[0052] Preferably, the first-effect heater 2, the first-effect evaporation tank 3, the second-effect heater 4, the second-effect evaporation tank 5, the triple-effect heater 6 and the triple-effect evaporation tank 7 are connected in sequence.

[0053] A third air duct 73 is fixedly arranged at the upper end of the triple-effect evaporation tank 7. A first horizontal condenser 10 is fixedly arranged at the lower end of the third air duct 73. A second horizontal condenser 11 is arranged at the lower end of the first horizontal condenser 10. A connecting elbow 12 is arranged between the first horizontal condenser 10 and the second horizontal condenser 11. A liquid receiving tank 13 is arranged at the lower end of the outlet of the second horizontal condenser 11. A negative pressure pump 14 is arranged at one end of the liquid receiving tank 13.

[0054] Preferably, one end of the annular pipe 8 is fixedly connected to the interface of the booster pump 9 by thread connection or by coupling connection; the annular pipe 8 is provided with a connection port respectively at the positions aligned with the lower ends of the first-effect heater 2, the second-effect heater 6, the triple-effect heater 7, the first-effect feed pipe 31, the first-effect cleaning pipe 32, the second-effect feed pipe 51, the second-effect cleaning pipe 52, the triple-effect feed pipe 71 and the triple-effect cleaning pipe 72. The lower ends of the first-effect heater 2, the second-effect heater 6 and the triple-effect heater 7 are fixedly connected to the aligned connection ports through connecting pipes; the first-effect feed pipe 31, the first-effect cleaning pipe 32, the second-effect feed pipe 51, the second-effect cleaning pipe 52, the triple-effect feed pipe 71 and the triple-effect cleaning pipe 72 are fixedly connected to the aligned connection ports by thread connection or by welding.

[0055] The first-effect heater 2, the first-effect evaporation tank 3, the second-effect heater 4, the second-effect evaporation tank 5, the third-effect heater 6 and the third-effect evaporation tank 7 are respectively fixedly connected to the equipment support 1 by bolts.

[0056] The first horizontal condenser 10 and the second horizontal condenser 11 are communicated through a connecting elbow 12. A densitometer and several control valves are arranged on the annular pipe 8. The booster pump 9 is a material pump or a cleaning pump. A feed pipe or a feed port is arranged on the annular pipe 8.

[0057] To make the structural design of the present utility model more reasonable, preferably, a first connecting pipe 15 is arranged on the negative pressure pump 14, and the end of the first connecting pipe 15 away from the negative pressure pump is fixedly connected to the bottom of the liquid receiving tank 13; a second connecting pipe 16 is fixedly arranged at the rear end of the liquid receiving tank 13, and a vacuum pump 17 is fixedly arranged at the end of the second connecting pipe 16 away from the liquid receiving tank.

[0058] A first gas guide pipe 33 is fixedly arranged at the upper end of the first-effect evaporation tank 3, a second gas guide pipe 53 is fixedly arranged at the upper end of the second-effect evaporation tank 5, a gas guide connecting pipe 18 is fixedly arranged between the first gas guide pipe 33 and the third gas guide pipe 73, and the second gas guide pipe 53 is communicated with the gas guide connecting pipe 18.

[0059] A first upper circulation pipe 19 is fixedly arranged between the upper end of the first-effect heater 2 and the side surface of the first-effect evaporation tank 3, and a first lower circulation pipe 20 is fixedly arranged between the lower end of the first-effect evaporation tank 3 and the lower end of the first-effect heater 2; a second upper circulation pipe 21 is fixedly arranged between the upper end of the second-effect heater 4 and the side surface of the second-effect evaporation tank 5, and a second lower circulation pipe 22 is fixedly arranged between the lower end of the second-effect evaporation tank 5 and the lower end of the second-effect heater 4; a third upper circulation pipe 23 is fixedly arranged between the upper end of the third-effect heater 6 and the side surface of the third-effect evaporation tank 7, and a third lower circulation pipe 24 is fixedly arranged between the lower end of the third-effect evaporation tank 7 and the lower end of the third-effect heater 6.

[0060] The first horizontal condenser 10 is a four-pass condenser, and the second horizontal condenser 11 is a two-pass condenser.

[0061] The pipelines of each component in this embodiment are fixedly connected by threads or by welding; the equipment support 1 and each component are fixedly connected by bolts or by welding.

[0062] In practical application, the concentrator of the utility model with a ring-shaped pipeline network is used for concentrating and evaporating the solvent. Steam is introduced into the first-effect heater to heat the material in the first-effect heater. The generated steam enters the first-effect evaporation tank for vapor-liquid separation. The secondary steam enters the second-effect heater to heat the material in the second-effect heater. The generated steam enters the second-effect evaporation tank for vapor-liquid separation. The tertiary steam enters the third-effect heater to heat the material in the third-effect heater. The generated steam enters the third-effect evaporation tank for vapor-liquid separation. The excess gas sequentially enters the first horizontal condenser and the second horizontal condenser. The first horizontal condenser and the second horizontal condenser condense the steam into liquid and enter the liquid receiving tank. The liquid in the liquid receiving tank is discharged through a negative pressure pump, thereby realizing the evaporation and recovery of the water (solvent) in the material and increasing the material concentration. The whole process is carried out under a negative pressure state. The function of the vacuum pump is to provide a vacuum environment for the whole system.

[0063] The utility model has a reasonable and simple structure design. By adopting a ring-shaped pipeline network structure, it is convenient to clean the pipelines around the concentrator. The density meter can be installed on the annular pipe, which is convenient to install and has good stability. The annular pipe has a good material guiding effect and can feed or discharge materials continuously under certain conditions.

[0064] The condenser adopts a horizontal structure: the first-stage condenser adopts a four-pass structure, and the second-stage condenser adopts a two-pass structure. The slender condenser with the same area can accelerate the flow of circulating water in the pipe, and the heat transfer efficiency is increased by 20% compared with the existing vertical condenser. The rapid flow of the circulating water can prevent scale formation and the formation of biological films. In addition, the pipe boxes at both ends of the horizontal condenser can be easily disassembled, which is convenient for maintenance and repair, and has good practicability.

[0065] The above embodiments are only for further illustration of the utility model and cannot be construed as limiting the protection scope of the utility model. Any non-essential improvements and adjustments made by those skilled in the art based on the content of the above utility model fall within the protection scope of the utility model.

Claims

1. A concentrator with a ring-shaped linear pipe network, comprising an equipment support (1), on which a heater and an evaporation tank connected in sequence are fixedly arranged, characterized in that: An annular tube (8) is fixedly provided at the lower end of the heater, and a booster pump (9) is provided at one end of the annular tube (8); the lower end of the heater is connected to the annular tube (8); A feed pipe and a cleaning pipe are fixedly arranged on the evaporator, and the lower ends of the feed pipe and the cleaning pipe are both connected to the annular pipe (8); The evaporator is provided with an air guide pipe, a first horizontal condenser (10) is fixedly provided at the lower end of the air guide pipe, a second horizontal condenser (11) is provided at the lower end of the first horizontal condenser (10), a connecting elbow (12) is provided between the first horizontal condenser (10) and the second horizontal condenser (11), a liquid receiving tank (13) is provided at the lower end of the outlet of the second horizontal condenser (11), and a negative pressure pump (14) is provided at one end of the liquid receiving tank (13).

2. A concentrator with a ring-shaped wire network according to claim 1, characterized in that: The heater comprises a first-effect heater (2), a second-effect heater (4) and a third-effect heater (6); the evaporator comprises a first-effect evaporator (3), a second-effect evaporator (5) and a third-effect evaporator (7); the first-effect evaporator (3) is fixedly provided with a first-effect feed pipe (31) and a first-effect cleaning pipe (32); the second-effect evaporator (5) is fixedly provided with a second-effect feed pipe (51) and a second-effect cleaning pipe (52); and the third-effect evaporator (7) is fixedly provided with a third-effect feed pipe (71) and a third-effect cleaning pipe (72); The lower ends of the first-effect heater (2), the second-effect heater (4), the third-effect heater (6), the first-effect feed pipe (31), the first-effect cleaning pipe (32), the second-effect feed pipe (51), the second-effect cleaning pipe (52), the third-effect feed pipe (71) and the third-effect cleaning pipe (72) are all in communication with the annular pipe (8).

3. A concentrator with a ring-shaped wire network according to claim 2, characterized in that: The annular tube (8) is provided with a density meter and a plurality of control valves.

4. The concentrator with a ring-shaped wire network according to claim 3, characterized in that: The negative pressure pump (14) is provided with a first connecting pipe (15), the first connecting pipe (15) being connected and fixed to the bottom of the liquid receiving tank (13) at an end facing away from the negative pressure pump; a second connecting pipe (16) is fixedly provided at the rear end of the liquid receiving tank (13), the second connecting pipe (16) being fixedly provided with a vacuum pump (17) at an end facing away from the liquid receiving tank.

5. The concentrator with a ring-shaped wire network according to claim 4, characterized in that: A first air guide pipe (33) is fixedly arranged at the upper end of the first-effect evaporation tank (3), a second air guide pipe (53) is fixedly arranged at the upper end of the second-effect evaporation tank (5), and a third air guide pipe (73) is fixedly arranged at the upper end of the third-effect evaporation tank (3); an air guide connecting pipe (18) is fixedly arranged between the first air guide pipe (33) and the third air guide pipe (73), and the second air guide pipe (53) is in communication with the air guide connecting pipe (18).

6. The concentrator with a ring-shaped wire network according to claim 5, characterized in that: A first upper circulation pipe (19) is fixedly arranged between the upper end of the first-effect heater (2) and the side surface of the first-effect evaporation tank (3), and a first lower circulation pipe (20) is fixedly arranged between the lower end of the first-effect evaporation tank (3) and the lower end of the first-effect heater (2); a second upper circulation pipe (21) is fixedly arranged between the upper end of the second-effect heater (4) and the side surface of the second-effect evaporation tank (5), and a second lower circulation pipe (22) is fixedly arranged between the lower end of the second-effect evaporation tank (5) and the lower end of the second-effect heater (4); a third upper circulation pipe (23) is fixedly arranged between the upper end of the triple-effect heater (6) and the side surface of the triple-effect evaporation tank (7), and a third lower circulation pipe (24) is fixedly arranged between the lower end of the triple-effect evaporation tank (7) and the lower end of the triple-effect heater (6).

7. A concentrator with a ring-shaped wire network according to claim 1 or 6, characterized in that: The first horizontal condenser (10) is a four-pass condenser, and the second horizontal condenser (11) is a two-pass condenser.

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