External circulation evaporator for extracting polyphenol DNJ content

Abstract

The utility model discloses an external circulation evaporator for extracting polyphenol DNJ content, which comprises a heater (1), an evaporator (2) and a condenser (3) which are sequentially connected, a guide plate (21) is arranged at the upper part in the evaporator (2), a plurality of inclined baffle plates (22) which are distributed in a vertically staggered manner are arranged above the guide plate (21), and a defoaming screen plate (23) is arranged above the baffle plates (22); a splitter plate (24) is arranged on the lower portion in the evaporator (2), a plurality of conical plates (25) are arranged below the splitter plate (24), a first gap (26) is reserved between every two adjacent conical plates (25), and a second gap (27) is reserved between each conical plate (25) and the inner wall of the evaporator (2). The gas-liquid separator has the characteristics of improving the gas-liquid separation effect and improving the evaporation efficiency.

Description

Technical Field

[0001] The utility model relates to an extraction device, in particular to an external circulation evaporator for extracting the content of polyphenol DNJ. Background Art

[0002] Polyphenol DNJ is an active ingredient naturally present in mulberry leaves, which has biological activities such as antioxidant, hypoglycemic, anti-inflammatory and anti-cancer. It has important application value in medicine, health care products and food industry. Common extraction methods of polyphenol DNJ include water extraction, organic solvent extraction, supercritical fluid extraction, microwave-assisted extraction, etc.; the equipment required includes extraction device, heating device, filtering device, concentration device, purification device, etc. Among the concentration and evaporation devices, the external circulation evaporator is a commonly used one, which is mainly composed of vacuum system, evaporator, heater, condenser and external circulation pipe. It can not only evaporate the solvent efficiently, but also play the role of cooling and purifying the solution during the evaporation process. The crude polyphenol DNJ extract exchanges heat with hot steam in the heater, so that the solvent in the crude polyphenol DNJ extract evaporates, and the crude polyphenol DNJ extract is converted into saturated steam. The saturated steam enters the evaporation chamber and performs gas-liquid separation under vacuum. The separated gas enters the condenser and condenses into liquid, which is continuously circulated, thereby achieving the effect of efficient evaporation and concentration extraction.

[0003] However, after the external circulation evaporator has worked for many cycles, more and more solvent in the crude polyphenol DNJ extraction product evaporates, and the concentration of the product gradually increases, resulting in a worse gas-liquid separation effect in the steamer during subsequent work and a lower evaporation efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an external circulation evaporator for extracting polyphenol DNJ content. The utility model has the characteristics of improving the gas-liquid separation effect and increasing the evaporation efficiency.

[0005] The technical solution of the utility model is as follows: an external circulation evaporator for extracting polyphenol DNJ content, comprising a heater, an evaporator and a condenser which are connected in sequence, a guide plate is arranged at the upper part of the evaporator, a plurality of baffles which are inclined and staggered up and down are arranged above the guide plate, and a defoaming mesh plate is arranged above the baffle; a diverter plate is arranged at the lower part of the evaporator, a plurality of conical plates are arranged below the diverter plate, a first gap is left between adjacent conical plates, and a second gap is left between the conical plate and the inner wall of the evaporator.

[0006] In the aforementioned external circulation evaporator for extracting polyphenol DNJ content, the guide plate is provided with guide holes inclined toward the baffle plate.

[0007] In the aforementioned external circulation evaporator for extracting polyphenol DNJ content, the cross section of the guide hole is trapezoidal, and the small end of the guide hole faces the baffle.

[0008] In the aforementioned external circulation evaporator for extracting polyphenol DNJ content, the top of the conical plate is provided with a through hole.

[0009] In the aforementioned external circulation evaporator for extracting polyphenol DNJ content, a movable plate inclined downward is provided at the second gap, the upper end of the movable plate is hinged to the inner wall of the evaporator, and one side of the movable plate is connected to the inner wall of the evaporator through a spring.

[0010] In the aforementioned external circulation evaporator for extracting polyphenol DNJ content, a fixing bracket for fixing all conical plates is also provided below the diverter plate, a mounting ring is provided on the conical plate, a fixing bolt is provided on the mounting ring, a transverse through groove is provided on the fixing bracket, and the fixing bracket passes through the mounting ring and is connected to the transverse through groove by the fixing bolt to fix the conical plate.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] In the utility model, the gas-liquid mixture of the crude polyphenol DNJ extract after heat exchange by the heater is separated into gas and liquid in the evaporator, wherein the steam flows upward through the guide plate to the baffle plate, and the flow rate is reduced under the collision of multiple baffle plates, so that the residual liquid in the steam is adhered to the baffle plate and separated, and the gas after deceleration is filtered and defoamed by the defoaming mesh plate, and the gas-liquid separation is further realized; and the liquid flows downward through the diverter plate for diversion, and the diverted liquid falls onto the conical plate and flows downward along the inclined surface of the conical plate, increasing the stroke in the evaporator, so that the gas contained in the liquid is further separated from the liquid, and the gas-liquid separation evaporation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a schematic diagram of the structure of a conical plate.

[0015] Figure 3 yes Figure 2 A magnified view of the local structure at point A.

[0016] The markings in the accompanying drawings are: 1. heater; 2. evaporator; 21. guide plate; 211. guide hole; 22. deflector; 23. defoaming mesh plate; 24. diverter plate; 25. conical plate; 251. through hole; 252. mounting ring; 253. fixing bolt; 26. first gap; 27. second gap; 3. condenser; 4. movable plate; 41. spring; 5. fixing bracket; 51. transverse through groove. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Example:

[0020] like Figure 1-Figure 3 As shown, an external circulation evaporator for extracting polyphenol DNJ content comprises a heater 1, an evaporator 2 and a condenser 3 which are connected in sequence, a guide plate 21 is provided at the upper part of the evaporator 2, a plurality of inclined baffles 22 which are staggered up and down are provided above the guide plate 21, a defoaming mesh plate 23 is provided above the baffle 22; a diverter plate 24 is provided at the lower part of the evaporator 2, a plurality of conical plates 25 are provided below the diverter plate 24, a first gap 26 is left between adjacent conical plates 25, and a second gap 27 is left between the conical plate 25 and the inner wall of the evaporator 2.

[0021] The gas-liquid mixture of the crude polyphenol DNJ extract after heat exchange by the heater 1 is separated into gas and liquid in the evaporator 2, wherein the steam flows upward through the guide plate 21 toward the baffle 22, and the flow rate is reduced under the collision of multiple baffles 22, so that the residual liquid in the steam adheres to the baffle 22 and is separated, and the decelerated gas is filtered and defoamed by the defoaming mesh plate 23, and further achieves gas-liquid separation; and the liquid flows downward through the diverter plate 24 for diversion, and the diverted liquid falls on the conical plate 25 and flows downward along the inclined surface of the conical plate 25, increasing the stroke in the evaporator 2, so that the gas contained in the liquid is further separated from the liquid, thereby improving the gas-liquid separation evaporation efficiency.

[0022] The guide plate 21 is provided with a guide hole 211 which is inclined toward the baffle plate 22. The flow velocity of the steam directed toward the baffle plate 22 is accelerated, and the liquid in the steam is deposited.

[0023] The cross section of the guide hole 211 is trapezoidal, and the small end of the guide hole 211 faces the baffle 22. The large end of the guide hole 211 faces the air inlet end, which is convenient for the introduction of steam, and the small end of the guide hole 211 faces the baffle 22, which increases the resistance of steam passing through the guide plate 21, so that further gas-liquid separation is achieved after the steam is blocked.

[0024] The top of the conical plate 25 is provided with a through hole 251. The through hole 251 is designed to facilitate the upward discharge of the steam contained in the liquid.

[0025] The second gap 27 is provided with a movable plate 4 which is tilted downward, the upper end of the movable plate 4 is hinged to the inner wall of the evaporator 2, and one side of the movable plate 4 is connected to the inner wall of the evaporator 2 through a spring 41. The liquid flowing into the second gap 27 is guided by the movable plate 4 to avoid being stuck on the inner wall of the evaporator 2, thereby reducing the residual loss of liquid in the evaporator 2 and improving the extraction efficiency of the polyphenol DNJ extract.

[0026] A fixing bracket 5 for fixing all the conical plates 25 is also provided below the diverter plate 24. Both ends of the fixing bracket 5 are fixed to the inner wall of the evaporator 2. A mounting ring 252 is provided on the conical plate 25. A fixing bolt 253 is provided on the mounting ring 252. A transverse through groove 51 is provided on the fixing bracket 5. The fixing bracket 5 passes through the mounting ring 252 and is connected to the transverse through groove 51 by the fixing bolt 253 to fix the conical plate 25. The conical plate 25 is installed in the evaporator 2 through the fixing bracket 5, and the conical plate 25 can move back and forth along the fixing bracket 5 through the mounting ring 252, thereby adjusting the size space of the first gap 26 and the second gap 27, so as to adapt to different evaporation conditions.

[0027] The parts not described in detail in the present invention are prior art and thus will not be described in detail here.

Claims

1. An external circulation evaporator for extracting polyphenol DNJ content, characterized in that: The invention comprises a heater (1), an evaporator (2) and a condenser (3) which are connected in sequence. A guide plate (21) is provided at the upper part of the evaporator (2). A plurality of inclined baffles (22) which are staggered in an up-and-down manner are provided above the guide plate (21). A defoaming mesh plate (23) is provided above the baffles (22). A diverter plate (24) is provided at the lower part of the evaporator (2). A plurality of conical plates (25) are provided below the diverter plate (24). A first gap (26) is left between adjacent conical plates (25). A second gap (27) is left between the conical plate (25) and the inner wall of the evaporator (2).

2. The external circulation evaporator for extracting polyphenol DNJ content according to claim 1, characterized in that: The guide plate (21) is provided with a guide hole (211) which is inclined toward the baffle plate (22).

3. An external circulation evaporator for extracting polyphenol DNJ content according to claim 2, characterized in that: The cross section of the flow guide hole (211) is trapezoidal, and the small end of the flow guide hole (211) faces the baffle (22).

4. The external circulation evaporator for extracting polyphenol DNJ content according to claim 1, characterized in that: A through hole (251) is provided on the top of the conical plate (25).

5. The external circulation evaporator for extracting polyphenol DNJ content according to claim 1, characterized in that: A movable plate (4) is provided at the second gap (27) and is distributed obliquely downward. The upper end of the movable plate (4) is hinged to the inner wall of the evaporator (2), and one side of the movable plate (4) is connected to the inner wall of the evaporator (2) via a spring (41).

6. The external circulation evaporator for extracting polyphenol DNJ content according to claim 1, characterized in that: A fixing bracket (5) for fixing all the conical plates (25) is also provided below the diverter plate (24); a mounting ring (252) is provided on the conical plate (25); a fixing bolt (253) is provided on the mounting ring (252); a transverse through groove (51) is provided on the fixing bracket (5); the fixing bracket (5) passes through the mounting ring (252) and is connected to the transverse through groove (51) by the fixing bolt (253) to fix the conical plate (25).

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