Vacuum constant-temperature evaporator

Abstract

The utility model discloses a vacuum constant-temperature evaporator which comprises an evaporation chamber, and a vacuum chamber and a buffer chamber which are communicated with each other are respectively arranged above and at the bottom of the evaporation chamber; a liquid inlet is formed in the vacuum chamber; a liquid inlet is formed in the evaporation chamber, a first-stage spraying disc, a second-stage spraying disc, a tube nest and an upper pore plate are sequentially arranged below the liquid inlet, and an annular gap is further formed between the upper pore plate and the tube nest. The device is reasonable in design structure, a negative pressure environment is formed in the evaporation chamber through the upper vacuum chamber, and then wax liquid is uniformly distributed between the upper pore plate and the tube nest through the first-stage spraying disc and the second-stage spraying disc; the wax liquid is further thinned through an annular space between the tube nest and the upper pore plate, so that the wax liquid flows from top to bottom along the outer wall of the tube nest, the wax liquid sequentially flows downwards and is rapidly evaporated to remove water, and the situation that part of the wax liquid is evaporated for a long time in the evaporation chamber is avoided; the problems that part of existing liquid is left between a tube plate and a tube opening in the steam device for a long time, and the wax liquid easily generates carbides, so that the recovery efficiency is low are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to evaporator technical field, concretely is a kind of vacuum thermostatic evaporator. BACKGROUND

[0002] Vacuum thermostatic evaporator is a kind of by controlling temperature and vacuum degree, so that liquid continuously evaporates, to achieve the purpose of concentration drying or separation;Shell membrane is completed after dewaxing in dewaxing kettle, since wax itself belongs to viscous material and forms liquid wax under high temperature, liquid wax will contain a large amount of condensed water after discharging under high-temperature steam atmosphere, which requires the use of evaporator to handle moisture in wax liquid.

[0003] In the Chinese invention patent CN107866087A, a falling film evaporator is disclosed, which includes an evaporator body and is provided with a plurality of heat exchange tubes inside, the liquid enters the upper tube plate through the feed inlet, and after accumulating a certain amount, it flows into the heat exchange tube from the serrated pipe opening, so that the liquid flows uniformly from top to bottom, however, a certain distance is required between the pipe opening and the tube plate, and after the liquid is fully distributed on the tube plate, it enters the heat exchange tube, so that part of the liquid remains between the tube plate and the pipe opening inside the evaporator for a long time, and the wax liquid is very easy to produce carbide in long-time high-temperature evaporation, which makes the recovery efficiency lower. UTILITY MODEL CONTENT

[0004] The utility model aims at making up for the deficiency of prior art, and provides a vacuum thermostatic evaporator.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A vacuum thermostatic evaporator, comprising an evaporation chamber, a vacuum chamber and a buffer chamber are respectively communicated with the upper and bottom of the evaporation chamber, the vacuum chamber is used for forming a negative pressure environment in the evaporation chamber, and the buffer chamber is used for storing liquid; The vacuum chamber is provided with a liquid inlet communicating inside and outside, for inputting liquid into the evaporation chamber; A first shower tray and a second shower tray are sequentially arranged in the evaporation chamber from top to bottom, for uniformly distributing liquid, and a support assembly is further arranged below the second shower tray in the evaporation chamber, and a tube bank is arranged on the support assembly; The support assembly comprises an upper hole plate, the tube bank is arranged in the hole of the upper hole plate, and an annular gap is arranged between the upper hole plate and the tube bank; When liquid flows, the liquid distributed uniformly by the first shower tray and the second shower tray flows into the upper hole plate, flows downward along the outer wall of the tube bank through the annular gap, and plays a role of thinning the liquid; A temperature control assembly is further arranged at the bottom of the tube bank, for regulating the evaporation temperature in the evaporation chamber.

[0007] Further, a vacuum air outlet is arranged at the top of the vacuum chamber, for extracting vacuum in the evaporation chamber;

[0008] The vacuum chamber is further provided with a protective baffle between the vacuum air outlet and the liquid inlet, which is used to prevent liquid from entering the vacuum air outlet.

[0009] Further, a right-angle liquid inlet pipe is installed in the liquid inlet, and the distance between the bottom pipe opening of the right-angle liquid inlet pipe and the first-stage shower tray is less than the distance between the right-angle liquid inlet pipe and the vacuum air outlet.

[0010] Further, the vacuum air outlet is in communication with a vacuum pump at one end outside the vacuum chamber, and a one-way valve and a filter are further arranged at the vacuum pump and the vacuum air outlet, which are used to prevent water from being sucked in.

[0011] Further, the support assembly further comprises a hole plate support flange connected to the inner wall of the evaporation chamber, and the top of the hole plate support flange is connected to the upper hole plate.

[0012] The lower hole plate is arranged below the upper hole plate and is connected to the upper hole plate through the connecting structure.

[0013] Further, the inner side of the buffer chamber is sequentially provided with a liquid level gauge baffle, an upper liquid level gauge and a lower liquid level gauge from top to bottom, which are used to detect the liquid capacity in the buffer chamber.

[0014] The bottom and the side close to the bottom of the buffer chamber are respectively provided with a first liquid outlet and a second liquid outlet, and the height of the first liquid outlet is the same as the height of the lower liquid level gauge, which are used to discharge liquid.

[0015] Further, the temperature control assembly comprises a heat conducting oil chamber, the top of the heat conducting oil chamber is sleeved outside the buffer chamber close to the top, and an electric heater is arranged in the heat conducting oil chamber, which is used to heat the heat conducting oil in the heat conducting oil chamber.

[0016] The outer side of the heat conducting oil chamber is fixedly connected with a circulating pipeline, the circulating pipeline is used to connect the heat conducting oil outlet of the heat conducting oil chamber and the heat conducting oil circulating inlet of the column tube, and the heat conducting oil circulating outlet of the column tube and the heat conducting oil inlet of the heat conducting oil chamber, and a circulating pump is further arranged on the circulating pipeline outside the evaporation chamber and the heat conducting oil chamber, so that the heat conducting oil is driven to circulate in the heat conducting oil chamber and the column tube when the evaporation chamber is heated.

[0017] A temperature sensor is arranged in the heat conducting oil chamber, which is used to detect the temperature of the heat conducting oil in the heat conducting oil chamber.

[0018] Further, the bottom of the heat conducting oil chamber is connected with a support plate, and a thermal insulation layer is arranged between the support plate and the heat conducting oil chamber.

[0019] Compared with the prior art, the vacuum constant-temperature evaporator has the following beneficial effects:

[0020] The utility model discloses a vacuum chamber is formed in the evaporating chamber through the upper vacuum chamber, and then the wax liquid is uniformly distributed between the upper orifice plate and the column tube through the first shower tray and the second shower tray, and the wax liquid is further thinned through the annular gap between the column tube and the upper orifice plate, so that the wax liquid flows from top to bottom along the outer wall of the column tube, realizes the quick evaporation and water removal of the wax liquid in turn, avoids the long-time evaporation of part of the wax liquid in the evaporating chamber, and solves the problem that the wax liquid is very easy to produce carbide when part of the liquid is long-time stored between the tube plate and the tube opening in the steam generator, and the recovery efficiency is low.

[0021] The utility model discloses a vacuum chamber is formed in the evaporating chamber, is used for reducing the boiling point of liquid and increasing the heat transfer temperature difference, improves the efficiency of evaporation, and through the decompression evaporation simultaneously, can be carried out at lower temperature, effectively reduces the decomposition of heat-sensitive material in the evaporation process, plays the role of protecting the activity of material.

[0022] The utility model discloses a certain annular gap is arranged between the column tube and the upper orifice plate, so that the liquid passes through the annular gap and circulates downward along the outer wall of the column tube, in order to thin the wax liquid, increase its surface area, make the heat spread fast and uniformly, and the vacuum baffle is arranged in the vacuum chamber, the liquid inlet adopts the right-angle liquid inlet pipe, the opening is downward, the distance between the liquid inlet and the vacuum air outlet is greater than the distance between the liquid inlet and the first shower tray, and the effect of preventing liquid splashing and backflow is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the whole structure schematic diagram of the utility model;

[0024] Figure 2 It is the sectional view of the evaporating chamber in the utility model;

[0025] Figure 3 It is the sectional view of the buffer chamber in the utility model;

[0026] Figure 4 It is the plan view of the utility model.

[0027] In the drawing: 1, vacuum air outlet;2, vacuum chamber;3, evaporating chamber;4, buffer chamber;5, heat conducting oil chamber;6, liquid inlet;7, first shower tray;8, second shower tray;9, column tube;10, orifice plate support flange;11, upper orifice plate;12, lower orifice plate;13, heat conducting oil circulation inlet and outlet;14, first liquid outlet;15, second liquid outlet;16, temperature detection port;17, electric heater;18, thermal insulation layer;19, lower liquid level meter;20, upper liquid level meter;21, liquid level meter baffle;22, protection baffle;23, support plate. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0029] As shown in Figures 1-4 The utility model provides a kind of technical scheme: a vacuum constant temperature evaporator, including evaporation chamber 3, and the bottom of evaporation chamber 3 is respectively connected with vacuum chamber 2 and buffer chamber 4, vacuum chamber 2 is used to form negative pressure environment in evaporation chamber 3, and buffer chamber 4 is used to store liquid feed;Vacuum chamber 2 is provided with liquid inlet 6 for communicating inside and outside, for inputting liquid feed into evaporation chamber 3;Evaporation chamber 3 is sequentially provided with first shower tray 7 and second shower tray 8 from top to bottom inside, for uniformly distributing liquid, and evaporation chamber 3 is further provided with support assembly below second shower tray 8, and support assembly is provided with tube bank 9;Support assembly includes upper hole plate 11, and tube bank 9 is arranged in the hole of upper hole plate 11, and ring gap is arranged between upper hole plate 11 and tube bank 9, when liquid flows, the liquid distributed uniformly by first shower tray 7 and second shower tray 8 flows onto upper hole plate 11, and flows downward along the outer wall of tube bank 9 through ring gap, to play the role of thinning liquid;The bottom of tube bank 9 is further provided with temperature control assembly, for regulating evaporation temperature in evaporation chamber 3.

[0030] In use, evaporation chamber 3 is vacuumized by vacuum chamber 2 to form negative pressure environment, and in this environment, the boiling point of water will be reduced, because boiling point is the temperature reached by liquid surface evaporation in equilibrium, after pressure reduction, mutual attraction between liquid molecules will be reduced, so that liquid molecules are more likely to jump into gas phase, and under the condition of reduced pressure, the boiling point of solution is reduced, so that the effective heat transfer temperature difference between tube bank 9 and secondary steam is increased, to improve the production intensity of evaporator, so that the evaporation process is more efficient, and secondly, in this environment, evaporation can be carried out at lower temperature, effectively reducing the decomposition of heat-sensitive substances in the evaporation process, and protecting the activity of substances;After forming negative pressure environment, wax liquid enters first shower tray 7 through liquid inlet 6, and then flows into second shower tray 8 below through the bottom and side of first shower tray 7, and after being uniformly distributed by second shower tray 8, it flows onto tube bank 9 and upper hole plate 11 below, and then through the ring gap between tube bank 9 and upper hole plate 11, the wax liquid enters through the ring gap of upper hole plate 11, and flows along the outer wall of tube bank 9 downward, so that the ring gap effectively thins the wax liquid, forms larger surface area, and makes heat spread fast and uniformly, so as to be able to continuously evaporate, thereby improving the rate of evaporation and water removal.

[0031] The top of the vacuum chamber 2 is provided with a vacuum exhaust port 1 for extracting vacuum in the evaporation chamber 3; the vacuum chamber 2 is further provided with a protective baffle 22 between the vacuum exhaust port 1 and the liquid inlet 6, which is used to prevent the liquid from entering the vacuum exhaust port 1; the liquid inlet 6 is provided with a right-angle liquid inlet pipe, and the distance between the bottom opening of the right-angle liquid inlet pipe and the first shower tray 7 is smaller than the distance between the right-angle liquid inlet pipe and the vacuum exhaust port 1; in use, the right-angle liquid inlet pipe includes a ninety-degree elbow and a short pipe, which is installed at the liquid inlet 6 through the elbow and the short pipe, and the opening is downwardly arranged above the first shower tray 7, so that the liquid enters from the vacuum chamber 2, falls onto the first shower tray 7, and then flows downwardly, and at the same time, the liquid passes through the protective baffle 22 above and the vacuum exhaust port 1 far away from the top, so as to prevent the wax liquid from splashing and flowing back when flowing into the first shower tray 7 under the negative pressure state.

[0032] The vacuum exhaust port 1 is communicated with a vacuum pump at one end outside the vacuum chamber 2, and a one-way valve and a filter are further arranged at the vacuum pump and the vacuum exhaust port 1, which are used to prevent the water from being sucked in; in use, the filter adopts a Y-shaped filter, so as to prevent the water in the external cooling device from being sucked into the internal evaporation device under the negative pressure state when the evaporation device is stopped.

[0033] The support assembly further comprises a hole plate support flange 10 connected to the inner wall of the evaporation chamber 3, and the top of the hole plate support flange 10 is connected with the upper hole plate 11; the column tube 9 is provided with a lower hole plate 12 close to the bottom, and the lower hole plate 12 is located below the upper hole plate 11 and connected with the upper hole plate 11 through a connecting structure; in use, the connecting structure can adopt a threaded rod and a nut to detachably connect the upper hole plate 11 and the lower hole plate 12, so as to position and support the lower hole plate 12 by the upper hole plate 11, and then the lower hole plate 12 is detachably connected and installed to support the column tube 9; the upper hole plate 11 and the hole plate support flange 10 are detachably connected, and the detachable connection can be fixed and installed by clamping, bolts and the like. In the utility model, the column tube 9 is a pipeline formed by connecting a plurality of straight pipes and U-shaped pipes, wherein every two straight pipes are connected by one U-shaped pipe, and the U-shaped pipe is located at the top of the upper hole plate 11 / the bottom of the lower hole plate 12.

[0034] The inside of the buffer chamber 4 is sequentially provided with a liquid level gauge baffle 21, an upper liquid level gauge 20 and a lower liquid level gauge 19 from top to bottom, which are used to detect the liquid capacity in the buffer chamber 4; the bottom and the side close to the bottom of the buffer chamber 4 are respectively provided with a first liquid outlet 14 and a second liquid outlet 15, and the height of the first liquid outlet 14 is the same as that of the lower liquid level gauge 19, which are used to discharge the liquid; in use, the liquid capacity in the buffer chamber 4 is detected at all times by the liquid level gauge baffle 21, the upper liquid level gauge 20 and the lower liquid level gauge 19, so as to timely discharge the liquid through the first liquid outlet 14 and the second liquid outlet 15.

[0035] The temperature control assembly comprises a heat conducting oil chamber 5, the top of which is sleeved on the outside of the buffer chamber 4 near the top, the inside of the heat conducting oil chamber 5 is provided with an electric heater 17 for heating the heat conducting oil in the heat conducting oil chamber 5, the outside of the heat conducting oil chamber 5 is fixedly connected with a circulating pipeline, the heat conducting oil circulating inlet and outlet 13 comprises a heat conducting oil circulating inlet and a heat conducting oil circulating outlet, the circulating pipeline is used for connecting the heat conducting oil outlet of the heat conducting oil chamber 5 and the heat conducting oil circulating inlet of the column tube 9, and the heat conducting oil circulating outlet of the column tube 9 and the heat conducting oil inlet of the heat conducting oil chamber 5, and a circulating pump is further arranged on the circulating pipeline outside the evaporation chamber 3 and the heat conducting oil chamber 5, so that the heat conducting oil is circulated and circulated in the heat conducting oil chamber 5 and the column tube 9 when the evaporation chamber 3 is heated; a temperature sensor is arranged in the heat conducting oil chamber 5 for detecting the temperature of the heat conducting oil in the heat conducting oil chamber 5; in use, a temperature detection port 16 is formed on the heat conducting oil chamber 5, and a temperature sensor is arranged at the temperature detection port 16 for detecting the temperature, the circulating pump body can be a heat conducting oil circulating pump, which is installed on the outside of the evaporation chamber 3, so that the heat conducting oil flows out of the heat conducting oil chamber 5, enters the circulating pipeline, then enters the column tube 9 through the circulating pump body, and then flows back to the heat conducting oil chamber 5 after passing through the column tube 9, and is heated by the electric heater 17; the electric heater 17 is provided with a temperature constant system, so as to heat the heat conducting oil to a corresponding temperature according to the evaporation demand; the first liquid outlet 14 and the second liquid outlet 15 are connected with pipelines which penetrate through the corresponding positions of the heat conducting oil chamber 5 and are in communication with the outside.

[0036] The bottom of the heat conducting oil chamber 5 is connected with a support plate 23, and a thermal insulation layer 18 is arranged between the support plate 23 and the heat conducting oil chamber 5; in use, the heat conducting oil chamber 5 is detachably connected with the buffer chamber 4, and a sealing structure is arranged at the connection, the vacuum chamber 2 and the evaporation chamber 3 are connected through flanges, and the evaporation chamber 3 and the buffer chamber 4 are connected through flanges, and flange sealing assemblies are arranged between the two, for forming a sealed container, and the whole device is arranged through the support plate 23.

Claims

1. A vacuum thermostatic evaporator comprising an evaporation chamber (3), characterized in that: The upper and bottom of the evaporation chamber (3) are respectively communicated with a vacuum chamber (2) and a buffer chamber (4), the vacuum chamber (2) is used for forming a negative pressure environment in the evaporation chamber (3), and the buffer chamber (4) is used for storing liquid; The vacuum chamber (2) is provided with a liquid inlet (6) for communicating the inside and outside, and is used for inputting liquid into the evaporation chamber (3); The inside of the evaporation chamber (3) is sequentially provided with a first shower tray (7) and a second shower tray (8) from top to bottom, and is used for uniformly distributing liquid, and the evaporation chamber (3) is further provided with a support assembly below the second shower tray (8), and the support assembly is provided with a column tube (9); The support assembly comprises an upper hole plate (11), the column tube (9) is arranged in the hole of the upper hole plate (11), and an annular gap is arranged between the upper hole plate (11) and the column tube (9); when liquid flows, the liquid uniformly distributed by the first shower tray (7) and the second shower tray (8) flows onto the upper hole plate (11), flows downward along the outer wall of the column tube (9) through the annular gap, and plays a role of thinning liquid; The bottom of the column tube (9) is further provided with a temperature control assembly, which is used for adjusting the evaporation temperature in the evaporation chamber (3).

2. The vacuum thermostatted evaporator of claim 1, wherein: The top of the vacuum chamber (2) is provided with a vacuum air outlet (1) for extracting vacuum in the evaporation chamber (3); The vacuum chamber (2) is further provided with a protective baffle (22), the protective baffle (22) is located between the vacuum air outlet (1) and the liquid inlet (6), and is used for preventing liquid from entering the vacuum air outlet (1).

3. The vacuum thermostatted evaporator of claim 2, wherein: A right-angle liquid inlet pipe is installed in the liquid inlet (6), and the distance between the bottom pipe opening of the right-angle liquid inlet pipe and the first shower tray (7) is less than the distance between the right-angle liquid inlet pipe and the vacuum air outlet (1).

4. The vacuum thermostatted evaporator of claim 2, wherein: One end of the vacuum air outlet (1) located outside the vacuum chamber (2) is communicated with a vacuum pump, and a one-way valve and a filter are further arranged at the vacuum pump and the vacuum air outlet (1), and are used for preventing water from being sucked in.

5. The vacuum thermostatted evaporator of claim 1, wherein: The support assembly further comprises a hole plate support flange (10) connected to the inner wall of the evaporation chamber (3), and the top of the hole plate support flange (10) is connected with the upper hole plate (11); The column tube (9) is provided with a lower hole plate (12) near the bottom, the lower hole plate (12) is located below the upper hole plate (11), and the lower hole plate (12) and the upper hole plate (11) are connected through a connecting structure.

6. The vacuum thermostatted evaporator of claim 1, wherein: The inside of the buffer chamber (4) is sequentially provided with a liquid level meter baffle (21), an upper liquid level meter (20) and a lower liquid level meter (19) from top to bottom, and is used for detecting the liquid capacity in the buffer chamber (4); The bottom and the side surface close to the bottom of the buffer chamber (4) are respectively provided with a first liquid outlet (14) and a second liquid outlet (15), the height of the first liquid outlet (14) is the same as the height of the lower liquid level meter (19), and the liquid is discharged.

7. The vacuum thermostatted evaporator of claim 1, wherein: The temperature control assembly comprises a heat conducting oil chamber (5), the top of the heat conducting oil chamber (5) is sleeved on the outside of the buffer chamber (4) near the top, and an electric heater (17) is arranged in the heat conducting oil chamber (5) and used for heating heat conducting oil in the heat conducting oil chamber (5); The outside of the heat conducting oil chamber (5) is fixedly connected with a circulating pipeline, the circulating pipeline is used for connecting a heat conducting oil outlet of the heat conducting oil chamber (5) and a heat conducting oil circulating inlet of the column tube (9), a heat conducting oil circulating outlet of the column tube (9) and a heat conducting oil inlet of the heat conducting oil chamber (5), and a circulating pump is further arranged on the circulating pipeline outside the evaporation chamber (3) and the heat conducting oil chamber (5), so that the heat conducting oil is circulated and circulated in the heat conducting oil chamber (5) and the column tube (9) when the evaporation chamber (3) is heated. A temperature sensor is arranged in the heat conducting oil chamber (5) and used for detecting the temperature of the heat conducting oil in the heat conducting oil chamber (5).

8. The vacuum thermostatted evaporator of claim 7, wherein: The bottom of the heat conducting oil chamber (5) is connected with a support plate (23), and a thermal insulation layer (18) is arranged between the support plate (23) and the heat conducting oil chamber (5).

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