Double-effect concentration evaporator

Abstract

The double-effect concentration evaporator comprises a first-effect heater, a first-effect evaporation tower, a second-effect heater, a second-effect evaporation tower and a condenser which are sequentially communicated, a first stirring motor is fixedly arranged at the position of an upper port of a first vertical through hole in the top of the first-effect evaporation tower, and a second evaporation cavity is formed in the second-effect evaporation tower. A second stirring motor is fixedly arranged at an upper port of a second vertical through hole in the top of the second-effect evaporation tower, a third vertical through hole is formed in one side of the second vertical through hole, a heating rod is arranged in the third vertical through hole, and an electric push rod is arranged above the heating rod; a steam circulating pipe is fixedly arranged between the first-effect evaporation tower and the second-effect evaporation tower; a first temperature detector is fixedly arranged at the front end of the outer surface of the first-effect evaporation tower, and a second temperature detector is fixedly arranged at the front end of the outer surface of the second-effect evaporation tower. According to the technical scheme, the structure design is reasonable, the concentration evaporation capacity is controllable, the evaporation efficiency is high, work is stable, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporators, in particular to a double-effect concentrating evaporator. Background Art

[0002] Double-effect concentrators are suitable for low-temperature vacuum concentration of heat-sensitive materials such as Chinese medicine, western medicine, glucose, brewing, starch, oral liquid, chemical industry, food, monosodium glutamate, dairy products, etc. Double-effect concentrators generally use two-effect simultaneous evaporation, and the secondary steam is fully utilized, which not only saves the investment in boilers, but also saves energy consumption. Compared with single-effect concentrators, energy consumption is reduced by 50%; double-effect concentrators use external heating natural circulation and vacuum negative pressure, with fast evaporation speed and high concentration ratio.

[0003] For example, the Chinese utility model patent with application number CN202221357090.6 discloses a double-effect evaporation and concentration system, including a first liquid feed heater, a first liquid feed evaporator, a first gas-liquid separator, and a steam condenser connected in sequence by pipelines. The evaporation and concentration system also includes a steam source and a heat pump unit. The first liquid feed heater is connected to the steam source, the heat pump unit is connected to the steam condenser by a pipeline to form a cooling medium circulation loop, and the first liquid feed heater is connected to the heat pump unit by a pipeline to form a heating medium circulation loop.

[0004] In the prior art, the concentrated evaporation equipment mainly uses steam as a heat source to drive the liquid in the liquid evaporator to roll and evaporate. However, when the liquid in the evaporator is too viscous or the liquid is too little, it is easy to cause the liquid to be difficult to roll, resulting in the liquid on the side and bottom of the evaporator being difficult to evaporate, reducing the evaporation efficiency of the evaporator, and being unable to control the concentrated evaporation amount. The operation is unstable and has poor practicality. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a double-effect concentrating evaporator with reasonable structural design, controllable concentration and evaporation amount, high evaporation efficiency, stable operation and good practicality.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-effect concentrating evaporator, comprising a first-effect heater, a first-effect evaporation tower, a second-effect heater, a second-effect evaporation tower and a condenser connected in sequence, the top of the first-effect evaporation tower is provided with a first vertical through hole, the first-effect evaporation tower is fixedly provided with a first stirring motor at an upper port position of the first vertical through hole, and the lower end of the output shaft of the first stirring motor is arranged through the first vertical through hole; a first evaporation chamber is provided in the first-effect evaporation tower, a first rotating shaft is vertically provided in the first evaporation chamber, the upper end of the first rotating shaft is fixedly connected to the lower end of the output shaft of the first stirring motor, and a plurality of first stirring blades are fixedly provided at the lower end of the first rotating shaft, characterized in that: a plurality of first positioning rods are provided at a position above the first stirring blade, each first positioning rod is fixedly provided with a first scraper at an end away from the first rotating shaft, a first silicone scraper is fixedly provided on the first scraper, and the first silicone scraper is connected to the inner wall surface of the first evaporation chamber at an end away from the first scraper;

[0007] A second evaporation chamber is provided in the second-effect evaporation tower, a second vertical through hole is provided on the top of the second-effect evaporation tower, a second stirring motor is fixedly provided at the upper port position of the second vertical through hole on the top of the second-effect evaporation tower, a third vertical through hole is provided on the top of the second-effect evaporation tower at a position on one side of the second vertical through hole, a heating rod is provided in the third vertical through hole, and the lower end of the heating rod is inserted into the second evaporation chamber; an electric push rod is provided above the heating rod, a linear push rod is provided at the lower end of the electric push rod, and the lower end of the linear push rod is detachably connected to the upper end of the heating rod; a positioning bracket is fixedly provided on one side of the electric push rod, and the lower end of the positioning bracket is fixedly connected to the outer surface of the second-effect evaporation tower;

[0008] A steam circulation pipe is fixedly arranged between the first-effect evaporation tower and the second-effect evaporation tower;

[0009] A first temperature detector is fixedly arranged at the front end position of the outer surface of the first-effect evaporation tower, and the first temperature detector includes a first liquid crystal display and a first temperature sensor. The first temperature sensor is fixedly installed on the inner wall surface of the first evaporation chamber, and a first connecting wire is arranged between the first temperature sensor and the first liquid crystal display, and the first temperature sensor and the first liquid crystal display are electrically connected through the first connecting wire; a second temperature detector is fixedly arranged at the front end position of the outer surface of the second-effect evaporation tower, and the second temperature detector includes a second liquid crystal display and a second temperature sensor. The second temperature sensor is fixedly installed on the inner wall surface of the second evaporation chamber, and a second connecting wire is arranged between the second temperature sensor and the second liquid crystal display, and the second temperature sensor and the second liquid crystal display are electrically connected through the second connecting wire.

[0010] The utility model is further configured as follows: a feed pipe is fixedly provided at the upper left end of the first-effect heater, a first connecting pipe is provided between the upper right end of the first-effect heater and the upper left end of the first-effect evaporation tower, a first discharge port is provided at the lower end of the first-effect evaporation tower, a first reflux port is provided at the lower end of the first-effect heater, and a first reflux pipe is fixedly provided between the first discharge port and the first reflux port; a steam guide pipe is provided between the upper right end of the first-effect evaporation tower and the top of the second-effect heater, a second connecting pipe is provided between the upper right end of the second-effect heater and the upper left end of the second-effect evaporation tower, a second discharge port is provided at the lower end of the second-effect evaporation tower, and a material collection box is provided at the lower end of the second discharge port.

[0011] The utility model is further configured as follows: a third connecting pipe is provided between the upper right end of the second-effect evaporation tower and the upper left end of the condenser, a first filter box is fixedly provided at the left end of the third connecting pipe, a second filter box is fixedly provided at the right end of the third connecting pipe, and a regulating valve is provided at a position of the third connecting pipe between the first filter box and the second filter box.

[0012] The utility model is further configured as follows: the first filter box includes a first box body and a first box cover, a first box body inlet is arranged on the left end surface of the first box body, a first box body outlet is arranged on the right end surface of the first box body, a first steam outlet is arranged on the upper right end of the second-effect evaporation tower, the left end surface of the first box body is fixedly connected to the right end surface of the second-effect evaporation tower, and the first box body inlet is aligned with the first steam outlet, and the first box outlet is fixedly connected to the left port of the third connecting pipe; a first filter cavity with an opening facing upward is arranged on the upper end of the first box body, a first filter screen is arranged in the first filter cavity, the upper end of the first filter screen is connected and fixed to the lower end surface of the first box cover by screws, and a first O-ring is sleeved on the lower end of the first box cover, and the first O-ring is used to form a seal between the first box cover and the inner wall surface of the first box body, and the first box cover is connected and fixed to the upper end of the first box body by screws.

[0013] The utility model is further configured as follows: the second filter box includes a second box body and a second box cover, a second box body inlet is arranged on the left end surface of the first box body, a second box body outlet is arranged on the right end surface of the second box body, a condenser steam inlet is arranged on the upper left end of the condenser, the right end surface of the second box body is fixedly connected to the left end surface of the condenser, and the second box body outlet is arranged to align with the condenser steam inlet, and the second box inlet is fixedly connected to the right port of the third connecting pipe; a second filter cavity with an opening facing upward is arranged on the upper end of the second box body, a second filter screen is arranged in the second filter cavity, the upper end of the second filter screen is connected and fixed to the lower end surface of the second box cover by screws, and the lower end of the second box cover is sleeved with a second O-ring, and the second O-ring is used to form a seal between the second box cover and the inner wall surface of the second box body, and the second box cover is connected and fixed to the upper end of the second box body by screws.

[0014] The utility model is further configured as follows: a second rotating shaft is arranged in the second evaporation chamber, the upper end of the second rotating shaft is connected and fixed to the output shaft of the second stirring motor through a coupling; a plurality of second stirring blades are fixedly arranged at the lower end of the second rotating shaft, a plurality of second positioning rods are arranged on the second rotating shaft above the second stirring blades, a second scraper is fixedly arranged at the end of each second positioning rod facing away from the second rotating shaft, a second silicone scraper is fixedly arranged on the second scraper, and the end of the second silicone scraper facing away from the second scraper is connected to the inner wall surface of the second evaporation chamber.

[0015] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model has a reasonable structural design, and by arranging a stirring motor, a rotating shaft and a stirring blade, when the liquid in the first-effect evaporation tower and the second-effect evaporation tower evaporates, the liquid can be driven to roll by stirring, and by arranging a scraper and a silica gel scraper, the inner wall surfaces of the first-effect evaporation tower and the second-effect evaporation tower are not easy to adhere to the material, which is conducive to the evaporation and concentration of the liquid; by arranging a coupling, the output shaft of the stirring motor and the rotating shaft can be well connected in transmission;

[0016] The utility model is provided with a heating rod at the upper end of the second-effect evaporation tower, and the heating rod can move up and down in the third vertical through hole through an electric push rod. When the second evaporation chamber is heated, it is heated from top to bottom. The temperature of the bottom of the solution in the second evaporation chamber is lower than the temperature of the top, thereby reducing the carbonization of the precipitated solvent due to excessive evaporation of the solution, and can realize controllable evaporation amount, high evaporation efficiency and stable operation;

[0017] A steam circulation pipe is fixedly arranged between the first-effect evaporation tower and the second-effect evaporation tower, and the first-effect evaporation tower and the second-effect evaporation tower are connected through the steam circulation pipe. The steam in the second-effect evaporation tower can be heated by the heating rod and then flow back into the first-effect evaporation tower, thereby forming a steam circulation, reducing the waste of heat energy, reducing the processing cost, and improving the practicality of the double-effect evaporator.

[0018] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a cross-sectional schematic diagram of the first evaporation tower of the embodiment of the utility model;

[0021] Figure 3 It is a cross-sectional schematic diagram of the second evaporation tower of the embodiment of the utility model;

[0022] Figure 4 It is a cross-sectional schematic diagram of the first filter box of the embodiment of the utility model;

[0023] Figure 5 It is a cross-sectional schematic diagram of the second filter box of the embodiment of the utility model. DETAILED DESCRIPTION

[0024] In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "back", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore, cannot be understood as a limitation on the utility model. In addition, if the terms "first", "second", and "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] See also Figures 1 to 5The utility model discloses a double-effect concentrating evaporator, comprising a first-effect heater 1, a first-effect evaporation tower 2, a second-effect heater 3, a second-effect evaporation tower 4 and a condenser 5 connected in sequence, wherein the top of the first-effect evaporation tower 2 is provided with a first vertical through hole 21, and the first-effect evaporation tower 2 is fixedly provided with a first stirring motor 6 at the upper end position of the first vertical through hole, and the lower end of the output shaft of the first stirring motor 6 is provided through the first vertical through hole 21; the first-effect evaporation tower 2 is provided with a first evaporation chamber 22, and the first evaporation chamber 22 is vertically provided with a first stirring motor 6; the first stirring motor 6 is provided with a first stirring motor 6 at the upper end position of ... A first rotating shaft 7 is provided, the upper end of the first rotating shaft 7 is fixedly connected to the lower end of the output shaft of the first stirring motor 6, a plurality of first stirring blades 8 are fixedly provided at the lower end of the first rotating shaft 7, a plurality of first positioning rods 9 are provided at the position above the first stirring blades 8 of the first rotating shaft 7, a first scraper 10 is fixedly provided on each first positioning rod 9 away from the first rotating shaft end, a first silicone scraper 11 is fixedly provided on the first scraper 10, and the first silicone scraper 11 is connected to the inner wall surface of the first evaporation chamber 22 away from the first scraper end;

[0026] A second evaporation chamber 40 is provided in the second-effect evaporation tower 4, a second vertical through hole 41 is provided on the top of the second-effect evaporation tower 4, a second stirring motor 12 is fixedly provided at the upper port position of the second vertical through hole 41 on the top of the second-effect evaporation tower 4, a third vertical through hole 42 is provided on the top of the second-effect evaporation tower 4 on one side of the second vertical through hole 41, a heating rod 13 is provided in the third vertical through hole 42, and the lower end of the heating rod 13 is inserted into the second evaporation chamber 40; an electric push rod 14 is provided above the heating rod 13, a linear push rod 141 is provided at the lower end of the electric push rod 14, and the lower end of the linear push rod 141 is detachably connected to the upper end of the heating rod 13; a positioning bracket 15 is fixedly provided on one side of the electric push rod 14, and the lower end of the positioning bracket 15 is fixedly connected to the outer surface of the second-effect evaporation tower 4;

[0027] A steam circulation pipe 16 is fixedly arranged between the first-effect evaporation tower 2 and the second-effect evaporation tower 4;

[0028] A first temperature detector is fixedly arranged at the front end of the outer surface of the first-effect evaporation tower 2, and the first temperature detector includes a first liquid crystal display screen 18 and a first temperature sensor 17. The first temperature sensor 17 is fixedly mounted on the inner wall surface of the first evaporation chamber 22. A first connecting wire is arranged between the first temperature sensor 17 and the first liquid crystal display screen 18, and the first temperature sensor 17 and the first liquid crystal display screen 18 are electrically connected through the first connecting wire.

[0029] A second temperature detector is fixedly arranged at the front end position of the outer surface of the second-effect evaporation tower 4, and the second temperature detector includes a second liquid crystal display 19 and a second temperature sensor 20. The second temperature sensor 20 is fixedly installed on the inner wall surface of the second evaporation chamber 40. A second connecting wire is arranged between the second temperature sensor 20 and the second liquid crystal display 19, and the second temperature sensor 20 is electrically connected to the second liquid crystal display 19 through the second connecting wire.

[0030] Preferably, a first motor bracket is fixedly arranged between the lower end of the first stirring motor 6 and the top of the high-efficiency evaporation tower 2, the lower end of the first motor bracket is fixed to the top of the high-efficiency evaporation tower 2 by welding or bolting, and the upper end of the first motor bracket is fixed to the first stirring motor 6 by bolting; the lower end of the output shaft of the first stirring motor 6 is fixed to the upper end of the first rotating shaft 7 by a coupling and bolts; 1-3 first stirring blades 8 are arranged at the lower end of the first rotating shaft 7, and one end of each first stirring blade 8 is welded and fixed to the lower end of the first rotating shaft 7 or bolted; 1-4 first positioning rods 9 are arranged above the first stirring blade 8 at the top of the first rotating shaft 7, one end of each first positioning rod 9 is welded and fixed to the first rotating shaft 7 or bolted, and the other end of each first positioning rod 9 is welded and fixed to the aligned first scraper 10 or bolted, the first scraper 10 is arranged vertically, and the first silicone scraper 11 is fixed to the first scraper 10 by nail-free glue; A second motor bracket is provided between the second stirring motor 12 and the top of the second-effect evaporation tower 4, the lower end of the second motor bracket is fixed to the top of the second-effect evaporation tower 4 by welding or bolting, and the upper end of the second motor bracket is fixed to the second stirring motor 12 by bolting; the upper end of the heating rod 13 is fixed to the lower end of the linear push rod 141 of the electric push rod 14 by a coupling or a connection plus connection, and the heating rod 13 is an electric heating rod; one side of the electric push rod 14 is fixed to the positioning bracket 15 by bolting, and the lower end of the positioning bracket 15 is fixed to the outer surface of the second-effect evaporation tower 4 by welding or bolting; the first liquid crystal display screen 18 is fixed to the outer surface of the first-effect evaporation tower 2 by welding or bolting, and the first temperature sensor 17 is fixed to the inner wall surface of the first evaporation chamber 22 by screws; the second liquid crystal display screen 19 is fixed to the outer surface of the second-effect evaporation tower 4 by welding or bolting, and the second temperature sensor 20 is fixed to the inner wall surface of the second evaporation chamber 40 by screws.

[0031] In order to make the structural design of the utility model more reasonable, as a preferred embodiment, a feed pipe 23 is fixedly provided at the upper left end of the first-effect heater 1 in this embodiment, a first connecting pipe 24 is provided between the upper right end of the first-effect heater 1 and the upper left end of the first-effect evaporation tower 2, a first discharge port 25 is provided at the lower end of the first-effect evaporation tower 2, a first reflux port 26 is provided at the lower end of the first-effect heater 1, and a first reflux pipe 27 is fixedly provided between the first discharge port 25 and the first reflux port 26;

[0032] A steam guide pipe 30 is provided between the upper right end of the first-effect evaporation tower 2 and the top of the second-effect heater 3, a second connecting pipe 28 is provided between the upper right end of the second-effect heater 3 and the upper left end of the second-effect evaporation tower 4, a second discharge port 43 is provided at the lower end of the second-effect evaporation tower 4, and a material collection box 29 is provided at the lower end of the second discharge port 43.

[0033] Preferably, the right end of the feed pipe 23 is welded and fixed to the upper left end of the first effect heater 1; the left end of the first connecting pipe 24 is welded and fixed to the upper right end of the first effect heater 1, and the right end of the first connecting pipe 24 is welded and fixed to the upper left end of the first effect evaporation tower 2; the left end of the second connecting pipe 28 is welded and fixed to the upper right end of the second effect heater 3, and the right end of the second connecting pipe 28 is welded and fixed to the upper left end of the second effect evaporation tower 4, the left end of the steam guide pipe 30 is welded and fixed to the upper right end of the first effect evaporation tower 2, and the right end of the steam guide pipe 30 is welded and fixed to the top of the second effect intensifier 3. A control valve is provided at the lower end of the second discharge port 43, and the control valve is a manual mechanical valve or a solenoid valve.

[0034] A third connecting pipe 31 is provided between the upper right end of the second-effect evaporation tower 4 and the upper left end of the condenser 5, a first filter box 32 is fixedly provided at the left end of the third connecting pipe 31, a second filter box 33 is fixedly provided at the right end of the third connecting pipe 31, and a regulating valve 34 is provided at the position of the third connecting pipe 31 between the first filter box 32 and the second filter box 33. Preferably, both ends of the third connecting pipe 31 are welded and fixed, the third connecting pipe 31 is divided into two sections, the regulating valve 34 is located between the two sections of the third connecting pipe 31, and is threadedly connected or welded to the third connecting pipe 31, and the regulating valve 34 is a manual mechanical valve or a solenoid valve.

[0035] The first filter box 32 includes a first box body 321 and a first box cover 322. The first box body inlet 323 is provided on the left end surface of the first box body 321, and the first box body outlet 324 is provided on the right end surface of the first box body 321. The first steam outlet 44 is provided on the upper right end of the second-effect evaporation tower 4. The left end surface of the first box body 321 is fixedly connected to the right end surface of the second-effect evaporation tower 4, and the first box body inlet 323 is aligned with the first steam outlet 44. The first box outlet 324 is fixedly connected to the left end of the third connecting pipe 31. Connection; a first filter cavity 325 with an upward opening is provided at the upper end of the first box body 321, a first filter screen 326 is provided in the first filter cavity 325, the upper end of the first filter screen 326 is connected and fixed to the lower end surface of the first box cover 322 by screws, the lower end of the first box cover 322 is sleeved with a first O-ring 327, the first O-ring 327 forms a seal between the first box cover 322 and the inner wall surface of the first box body 321, and the first box cover 322 is fixed to the upper end of the first box body 321 by screws.

[0036] The second filter box 33 includes a second box body 331 and a second box cover 332. A second box body inlet 333 is provided on the left end surface of the first box body 321, and a second box body outlet 334 is provided on the right end surface of the second box body 331. A condenser steam inlet is provided on the upper left end of the condenser 5. The right end surface of the second box body 331 is fixedly connected to the left end surface of the condenser 5, and the second box body outlet 334 is aligned with the condenser steam inlet. The second box body inlet 333 is fixedly connected to the right end of the third connecting pipe 31. A second filter cavity 335 with an upward opening is provided at the upper end of the second box body 331, and a second filter screen 336 is provided in the second filter cavity 335. The upper end of the second filter screen 336 is connected and fixed to the lower end surface of the second box cover 332 by screws, and a second O-ring 337 is sleeved on the lower end of the second box cover 332. The second O-ring 337 forms a seal between the second box cover 332 and the inner wall surface of the second box body 331, and the second box cover 332 is fixed to the upper end of the second box body 331 by screws.

[0037] A second rotating shaft 45 is provided in the second evaporation chamber 40, and the upper end of the second rotating shaft 45 is connected and fixed to the output shaft of the second stirring motor 12 through a coupling; a plurality of second stirring blades 46 are fixedly provided at the lower end of the second rotating shaft 45, and a plurality of second positioning rods 47 are provided on the second rotating shaft 45 above the second stirring blades 46, and a second scraper 48 is fixedly provided on each second positioning rod 47 away from the second rotating shaft end, and a second silicone scraper strip 49 is fixedly provided on the second scraper strip 48, and the second silicone scraper strip 49 is connected to the inner wall surface of the second evaporation chamber 40 away from the second scraper end.

[0038] Preferably, the number of second stirring blades 46 arranged at the lower end of the second rotating shaft 45 is 2-3, and one end of each second stirring blade 46 is welded and fixed to the lower end of the second rotating shaft 45 or fixed by bolts; the second rotating shaft 45 is provided with 2-4 second positioning rods 47 above the second stirring blade 46 located at the top, and one end of each second positioning rod 47 is welded and fixed to the second rotating shaft 45, and the other end of the second positioning rod 47 is fixed to the aligned second scraper 48 by welding or bolts, and the second scraper 48 is vertically arranged, and the second scraper 48 is fixed to the second silicone scraper strip 49 by nail-free glue.

[0039] In actual application, by setting a stirring motor, a rotating shaft and a stirring blade, when the liquid in the first-effect evaporation tower and the second-effect evaporation tower evaporates, the liquid can be driven to roll by stirring. By setting a scraper and a silicone scraper, the inner wall surface of the first-effect evaporation tower and the second-effect evaporation tower is not easy to adhere to the material, which is conducive to the evaporation and concentration of the liquid. By setting a coupling, the output shaft of the stirring motor and the rotating shaft can be well connected in transmission.

[0040] The utility model is provided with a heating rod at the upper end of the second-effect evaporation tower, and the heating rod can move up and down in the third vertical through hole through an electric push rod. When the second evaporation chamber is heated, it is heated from top to bottom. The temperature of the bottom of the solution in the second evaporation chamber is lower than the temperature of the top, thereby reducing the carbonization of the precipitated solvent due to excessive evaporation of the solution, and can realize controllable evaporation amount, high evaporation efficiency and stable operation;

[0041] A steam circulation pipe is fixedly arranged between the first-effect evaporation tower and the second-effect evaporation tower, and the first-effect evaporation tower and the second-effect evaporation tower are connected through the steam circulation pipe. The steam in the second-effect evaporation tower can be heated by the heating rod and then flow back into the first-effect evaporation tower, thereby forming a steam circulation, reducing the waste of heat energy, reducing the processing cost, and improving the practicality of the double-effect evaporator.

[0042] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above-mentioned utility model, which fall within the scope of protection of the present invention.

Claims

1. A double-effect concentrating evaporator, comprising a first-effect heater (1), a first-effect evaporation tower (2), a second-effect heater (3), a second-effect evaporation tower (4) and a condenser (5) connected in sequence, wherein the top of the first-effect evaporation tower (2) is provided with a first vertical through hole (21), the first-effect evaporation tower (2) is fixedly provided with a first stirring motor (6) at an upper end position of the first vertical through hole (21), and the lower end of the output shaft of the first stirring motor (6) is arranged through the first vertical through hole (21); a first evaporation chamber (22) is provided in the first-effect evaporation tower (2), a first rotating shaft (7) is vertically arranged in the first evaporation chamber (22), the upper end of the first rotating shaft (7) is fixedly connected to the lower end of the output shaft of the first stirring motor (6), and the lower end of the first rotating shaft (7) is fixedly provided with a plurality of first stirring blades (8), characterized in that: The first rotating shaft (7) is provided with a plurality of first positioning rods (9) located above the first stirring blade (8), each first positioning rod (9) is fixedly provided with a first scraper (10) at an end away from the first rotating shaft, a first silicone scraper (11) is fixedly provided on the first scraper (10), and the first silicone scraper (11) is connected to the inner wall surface of the first evaporation chamber (22) at an end away from the first scraper; The second-effect evaporation tower (4) is provided with a second evaporation chamber (40), the top of the second-effect evaporation tower (4) is provided with a second vertical through hole (41), the top of the second-effect evaporation tower (4) is located at the upper end position of the second vertical through hole (41) and a second stirring motor (12) is fixedly provided, the top of the second-effect evaporation tower (4) is located at a position on one side of the second vertical through hole (41) and a third vertical through hole (42) is provided at the top of the second-effect evaporation tower (4), and a heating rod (13) is provided in the third vertical through hole (42). ), the lower end of the heating rod (13) is inserted into the second evaporation chamber (40); an electric push rod (14) is arranged above the heating rod (13), a linear push rod (141) is arranged at the lower end of the electric push rod (14), and the lower end of the linear push rod (141) is detachably connected to the upper end of the heating rod (13); a positioning bracket (15) is fixedly arranged on one side of the electric push rod (14), and the lower end of the positioning bracket (15) is fixedly connected to the outer surface of the second-effect evaporation tower (4); A steam circulation pipe (16) is fixedly arranged between the first-effect evaporation tower (2) and the second-effect evaporation tower (4); A first temperature detector is fixedly arranged at the front end of the outer surface of the first-effect evaporation tower (2), the first temperature detector comprising a first liquid crystal display screen (18) and a first temperature sensor (17), the first temperature sensor (17) being fixedly mounted on the inner wall surface of the first evaporation chamber (22), a first connecting wire being arranged between the first temperature sensor (17) and the first liquid crystal display screen (18), and the first temperature sensor (17) and the first liquid crystal display screen (18) being electrically connected via the first connecting wire; A second temperature detector is fixedly arranged at the front end of the outer surface of the second-effect evaporation tower (4), and the second temperature detector comprises a second liquid crystal display screen (19) and a second temperature sensor (20). The second temperature sensor (20) is fixedly mounted on the inner wall surface of the second evaporation chamber (40). A second connecting wire is arranged between the second temperature sensor (20) and the second liquid crystal display screen (19), and the second temperature sensor (20) and the second liquid crystal display screen (19) are electrically connected via the second connecting wire.

2. A double-effect concentrating evaporator according to claim 1, characterized in that: A feed pipe (23) is fixedly provided at the upper left end of the first-effect heater (1); a first connecting pipe (24) is provided between the upper right end of the first-effect heater (1) and the upper left end of the first-effect evaporation tower (2); a first discharge port (25) is provided at the lower end of the first-effect evaporation tower (2); a first reflux port (26) is provided at the lower end of the first-effect heater (1); a first reflux pipe (27) is fixedly provided between the first discharge port (25) and the first reflux port (26); a steam guide pipe (30) is provided between the upper right end of the first-effect evaporation tower (2) and the top of the second-effect heater (3); a second connecting pipe (28) is provided between the upper right end of the second-effect heater (3) and the upper left end of the second-effect evaporation tower (4); a second discharge port (43) is provided at the lower end of the second-effect evaporation tower (4); and a material collection box (29) is provided at the lower end of the second discharge port (43).

3. A double-effect concentrating evaporator according to claim 2, characterized in that: A third connecting pipe (31) is provided between the upper right end of the second-effect evaporation tower (4) and the upper left end of the condenser (5); a first filter box (32) is fixedly provided at the left end of the third connecting pipe (31); a second filter box (33) is fixedly provided at the right end of the third connecting pipe (31); and a regulating valve (34) is provided at a position of the third connecting pipe (31) between the first filter box (32) and the second filter box (33).

4. A double-effect concentrating evaporator according to claim 3, characterized in that: The first filter box (32) comprises a first box body (321) and a first box cover (322); a first box body inlet (323) is provided on the left end surface of the first box body (321); a first box body outlet (324) is provided on the right end surface of the first box body (321); a first steam outlet (44) is provided at the upper right end of the second-effect evaporation tower (4); the left end surface of the first box body (321) is fixedly connected to the right end surface of the second-effect evaporation tower (4); the first box body inlet (323) is aligned with the first steam outlet (44); the first box body outlet (324) is connected to the left end of the third connecting pipe (31); The first box body (321) is fixedly connected; the upper end of the first box body (321) is provided with a first filter cavity (325) with an opening facing upward, and a first filter screen (326) is provided in the first filter cavity (325); the upper end of the first filter screen (326) is fixedly connected to the lower end surface of the first box cover (322) by screws; the lower end of the first box cover (322) is sleeved with a first O-type sealing ring (327); the first O-type sealing ring (327) forms a seal between the first box cover (322) and the inner wall surface of the first box body (321); the first box cover (322) is fixedly connected to the upper end of the first box body (321) by screws.

5. A double-effect concentrating evaporator according to claim 4, characterized in that: The second filter box (33) comprises a second box body (331) and a second box cover (332); a second box body inlet (333) is provided on the left end surface of the first box body (321); a second box body outlet (334) is provided on the right end surface of the second box body (331); a condenser steam inlet is provided at the upper left end of the condenser (5); the right end surface of the second box body (331) is fixedly connected to the left end surface of the condenser (5); the second box body outlet (334) is aligned with the condenser steam inlet; and the second box body inlet (333) is fixedly connected to the right end port of the third connecting pipe (31); The upper end of the second box body (331) is provided with a second filter cavity (335) with an opening facing upward, and a second filter screen (336) is provided in the second filter cavity (335). The upper end of the second filter screen (336) is connected and fixed to the lower end surface of the second box cover (332) by screws, and the lower end of the second box cover (332) is sleeved with a second O-ring (337). The second O-ring (337) forms a seal between the second box cover (332) and the inner wall surface of the second box body (331), and the second box cover (332) is connected and fixed to the upper end of the second box body (331) by screws.

6. A double-effect concentrating evaporator according to claim 1 or 5, characterized in that: A second rotating shaft (45) is arranged in the second evaporation chamber (40), and the upper end of the second rotating shaft (45) is connected and fixed to the output shaft of the second stirring motor (12) through a coupling; a plurality of second stirring blades (46) are fixedly arranged at the lower end of the second rotating shaft (45), and a plurality of second positioning rods (47) are arranged on the second rotating shaft (45) above the second stirring blades (46), and a second scraper (48) is fixedly arranged on each second positioning rod (47) at the end facing away from the second rotating shaft, and a second silicone scraper (49) is fixedly arranged on the second scraper (48), and the second silicone scraper (49) is connected to the inner wall surface of the second evaporation chamber (40) at the end facing away from the second scraper.

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