Bottom tube nest heating device of extraction tank

Abstract

The utility model discloses an extraction tank bottom tube nest heating device which comprises a slag discharging door, a heating containing cavity is formed in the slag discharging door, and a straight-through steam distribution disc is arranged in the heating containing cavity. A tubular heater is arranged above the straight-through steam distribution disc and comprises a shell pass outer barrel, an upper tube plate, a lower tube plate and a plurality of heat exchange tubes, the upper end of each heat exchange tube is fixedly connected with the upper tube plate, the lower end of each heat exchange tube is fixedly connected with the lower tube plate, the upper tube plate is fixedly connected with the upper end of the shell pass outer barrel, and the lower tube plate is fixedly connected with the lower end of the shell pass outer barrel. The lower tube plate is fixedly connected with the lower end of the shell pass outer cylinder, the upper tube plate, the lower tube plate and the shell pass outer cylinder are fixed to form a shell pass heating cavity, and the heat exchange tubes are all located in the shell pass heating cavity; and a shell pass steam inlet extension pipe, a shell pass condensate water outlet extension pipe, a straight-through steam inlet extension pipe and a material outlet extension pipe are fixedly arranged at the lower end of the slag outlet door. According to the technical scheme, the structural design is reasonable, the medicinal material heating speed is high, fluidity is good, heating is uniform, and practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction tanks, and particularly relates to a tube heating device at the bottom of an extraction tank. Background Art

[0002] An extraction tank is a commonly used leaching and extraction device in pharmaceutical and chemical industries, especially suitable for the leaching and extraction of components contained in plant products; in order to facilitate slag discharging operation after the extraction of extracts, a split slag discharging door is arranged at the bottom of the extraction tank body; the slag discharging door generally adopts jacket heating, and the existing conventional slag discharging doors generally adopt integral or honeycomb jackets for heating; both of these two jackets have the following problems: (1) Since the switch connecting piece of the slag discharging door is connected to the jacket, a large acting force will be generated on the jacket when the slag discharging door is switched, causing the jacket to deform; (2) After steam is introduced into the jacket, the slag discharging door is a pressurized device here, and there are many holes in the head, which brings a lot of inconvenience to the equipment strength calculation and stress analysis of the slag discharging door.

[0003] The heating area of the integral jacket or honeycomb jacket is limited by aspects such as the cylinder diameter, the bottom liquid outlet, and the welding of related components of the slag discharging device, and it is difficult to adjust according to the actual situation. The uniformity of heating during the extraction process has a certain impact on the product extraction rate and drug uniformity. Since the heat is transferred from bottom to top, the medicinal materials are heated unevenly, and the medicinal materials are prone to undercooking or local boiling phenomena, and the practicability is poor. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a tube heating device at the bottom of an extraction tank with reasonable structural design, fast heating speed of medicinal materials, good fluidity, uniform heating and good practicability.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A tube heating device at the bottom of an extraction tank, including a slag discharging door, a heating cavity is arranged inside the slag discharging door, and a direct-through steam distribution plate is arranged inside the heating cavity, and the direct-through steam distribution plate is located at the middle position of the heating cavity;

[0006] A tube type heater is arranged at the position above the direct-through steam distribution plate in the heating cavity. The tube type heater includes a shell-side outer cylinder, an upper tube sheet, a lower tube sheet and a plurality of heat exchange tubes. The upper end of each heat exchange tube is fixedly connected to the upper tube sheet, and the lower end of each heat exchange tube is fixedly connected to the lower tube sheet. The upper tube sheet is fixedly connected to the upper end of the shell-side outer cylinder, and the lower tube sheet is fixedly connected to the lower end of the shell-side outer cylinder. After the upper tube sheet, the lower tube sheet and the shell-side outer cylinder are assembled and fixed together, a shell-side heating cavity is formed, and all the heat exchange tubes are located inside the shell-side heating cavity;

[0007] A shell-side steam inlet extension pipe, a shell-side condensate outlet extension pipe, a direct-through steam inlet extension pipe, and a material outlet extension pipe are fixedly arranged at the lower end of the slag discharge door. The inner port of the shell-side steam inlet extension pipe communicates with the side surface of the shell-side heating chamber. The inner port of the shell-side condensate outlet extension pipe communicates with the side surface or the bottom of the shell-side heating chamber. The inner port of the direct-through steam inlet extension pipe communicates with the direct-through steam distribution plate. The inner port of the material outlet extension pipe communicates with the bottom of the heating cavity.

[0008] The utility model is further arranged as follows: a upper through hole is vertically arranged at the position of the upper port of each heat exchange tube aligned with the upper tube plate, and the upper end of each heat exchange tube is inserted into the aligned upper through hole; a lower through hole is vertically arranged at the position of the lower port of each heat exchange tube aligned with the lower tube plate, and the lower end of each heat exchange tube is inserted into the aligned lower through hole.

[0009] The utility model is further arranged as follows: a plurality of support round steel are arranged between the lower tube plate and the inner wall surface of the slag discharge door. The lower end of the support round steel is fixedly connected with the inner wall surface of the slag discharge door, and the upper end of the support round steel is fixedly connected with the lower tube plate.

[0010] The utility model is further arranged as follows: a plurality of positioning brackets are arranged between the direct-through steam distribution plate and the inner wall surface of the slag discharge door. The direct-through steam distribution plate is fixed by the positioning brackets.

[0011] The utility model is further arranged as follows: connection flanges are integrally arranged at the lower ends of the shell-side steam inlet extension pipe, the shell-side condensate outlet extension pipe, the direct-through steam inlet extension pipe, and the material outlet extension pipe.

[0012] The utility model is further arranged as follows: the upper tube plate and the upper end of the inner wall surface of the slag discharge door are fixedly connected by bolts.

[0013] The beneficial effects of the utility model are as follows: compared with the prior art, the structure design of the utility model is reasonable. The heating area of the shell-and-tube heater in the slag discharge door is larger than that of the traditional coil or jacket. The shell-and-tube heat exchange is combined with direct-through steam, so that the medicinal materials are heated more evenly, and there will be no undercooked or local boiling phenomenon. During the extraction process of the extraction tank, this structure can truly realize the extraction tank to maintain a slightly boiling state by passing steam; moreover, adopting the shell-and-tube structure, the medicinal materials are in a rising film state when heated, which can accelerate the fluidity of the liquid medicine, thereby improving the extraction rate of the medicinal materials. The medicinal materials are heated quickly, have good fluidity, are heated evenly and have good practicability.

[0014] The following further describes the utility model with reference to the specification drawings and specific embodiments. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the utility model;

[0016] Figure 2 Explosion schematic diagram of the embodiment of the present utility model;

[0017] Figure 3 Bottom view schematic diagram of the embodiment of the present utility model;

[0018] Figure 4 Schematic diagram of the partial structure of the embodiment of the present utility model Figure 1 ;

[0019] Figure 5 Schematic diagram of the partial structure of the embodiment of the present utility model Figure 2 ;

[0020] Figure 6 Explosion schematic diagram of the partial structure of the embodiment of the present utility model. Specific implementation manner

[0021] In the description of this embodiment, it should be noted that when terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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 utility model. In addition, when terms such as "first", "second", "third" appear, they are only for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] Refer to Figures 1 to 6 , a tube bundle heating device at the bottom of an extraction tank disclosed by the present utility model includes a slag discharge door 1. A heating cavity 11 is arranged inside the slag discharge door 1. A direct-through steam distribution plate 2 is arranged inside the heating cavity 11, and the direct-through steam distribution plate 2 is located at the middle position of the heating cavity 11;

[0023] A tube bundle heater 3 is arranged at the position above the direct-through steam distribution plate 2 in the heating cavity 11. The tube bundle heater 3 includes a shell-side outer cylinder 31, an upper tube sheet 32, a lower tube sheet 33 and a plurality of heat exchange tubes 34. The upper end of each heat exchange tube 34 is fixedly connected to the upper tube sheet 32, and the lower end of each heat exchange tube 34 is fixedly connected to the lower tube sheet 33. The upper tube sheet 32 is fixedly connected to the upper end of the shell-side outer cylinder 31, and the lower tube sheet 33 is fixedly connected to the lower end of the shell-side outer cylinder 31. After the upper tube sheet 32, the lower tube sheet 33 and the shell-side outer cylinder 31 are assembled and fixed together, they form a shell-side heating cavity together, and all the heat exchange tubes 34 are located inside the shell-side heating cavity;

[0024] A shell-side steam inlet extension pipe 4, a shell-side condensate outlet extension pipe 5, a direct-through steam inlet extension pipe 6, and a material outlet extension pipe 7 are fixedly arranged at the lower end of the slag discharge door 1. The inner port of the shell-side steam inlet extension pipe 4 communicates with the side surface of the shell-side heating chamber, and the inner port of the shell-side condensate outlet extension pipe 5 communicates with the side surface or the bottom of the shell-side heating chamber. The inner port of the direct-through steam inlet extension pipe 6 communicates with the direct-through steam distribution plate 2, and the inner port of the material outlet extension pipe 7 communicates with the bottom of the heating cavity 11.

[0025] Preferably, the shell-side outer cylinder 31, the upper tube sheet 32, and the lower tube sheet 33 are fixedly connected by welding or bolt connection.

[0026] To make the structural design of the present utility model more reasonable, preferably, a upper through hole is vertically arranged at the position of the upper port of each heat exchange tube 34 aligned with the upper tube sheet 32 of this embodiment, and the upper end of each heat exchange tube 34 is inserted into the aligned upper through hole; a lower through hole is vertically arranged at the position of the lower port of each heat exchange tube 34 aligned with the lower tube sheet 33, and the lower end of each heat exchange tube 34 is inserted into the aligned lower through hole.

[0027] Preferably, the upper port of the heat exchange tube 34 exposes the upper orifice of the aligned upper through hole, and the lower port of the heat exchange tube 34 exposes the lower orifice of the aligned lower through hole.

[0028] A number of support round steel are arranged between the lower tube sheet 33 and the inner wall surface of the slag discharge door 1. The lower end of the support round steel is fixedly connected to the inner wall surface of the slag discharge door 1, and the upper end of the support round steel is fixedly connected to the lower tube sheet 33.

[0029] A number of positioning brackets are arranged between the direct-through steam distribution plate 2 and the inner wall surface of the slag discharge door 1, and the direct-through steam distribution plate 2 is fixed by the positioning brackets. Preferably, the number of the positioning brackets is set to 1-3, and the positioning brackets are all fixedly connected by welding or bolt connection.

[0030] Connection flanges are integrally arranged at the lower ends of the shell-side steam inlet extension pipe 4, the shell-side condensate outlet extension pipe 5, the direct-through steam inlet extension pipe 6, and the material outlet extension pipe 7. Preferably, the upper ends of the shell-side steam inlet extension pipe 4, the shell-side condensate outlet extension pipe 5, the direct-through steam inlet extension pipe 6, and the material outlet extension pipe 7 are fixedly connected to the aligned interfaces by welding or threaded connection.

[0031] The upper tube sheet 32 is fixedly connected to the upper end of the inner wall surface of the slag discharge door 1 by bolt connection.

[0032] In practical application, the tube bundle heating device at the bottom of the extraction tank of the present utility model is installed at the bottom of the existing extraction tank. The heating area of the tube bundle heater is larger than that of the traditional coil or jacket, and the tube bundle heat exchange is combined with direct steam, so that the medicinal materials are heated more evenly, and there will be no phenomenon of undercooked or local boiling. During the extraction process of the extraction tank, this structure can truly keep the extraction tank in a slightly boiling state by passing steam; moreover, with the tube bundle structure, the medicinal materials are in a rising film state during heating, which can accelerate the fluidity of the liquid medicine, thereby improving the extraction rate of the medicinal materials.

[0033] In summary, the structure of the present utility model is reasonably designed, with fast heating speed, good fluidity, uniform heating and good practicability of the medicinal materials.

[0034] The above embodiments are only used to further illustrate the present utility model, and should not be construed as limiting the protection scope of the present 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 present utility model.

Claims

1. A tube bundle heating device at the bottom of an extraction tank, comprising a slag discharge door (1), wherein a heating cavity (11) is arranged inside the slag discharge door (1), and it is characterized in that: A direct-through steam distribution plate (2) is arranged in the heating cavity (11), and the direct-through steam distribution plate (2) is located at the middle position of the heating cavity (11); A shell-and-tube heater (3) is arranged above the direct-through steam distribution plate (2) in the heating cavity (11). The shell-and-tube heater (3) includes a shell-side outer cylinder (31), an upper tube sheet (32), a lower tube sheet (33) and a plurality of heat exchange tubes (34). The upper end of each heat exchange tube (34) is fixedly connected to the upper tube sheet (32), and the lower end of each heat exchange tube (34) is fixedly connected to the lower tube sheet (33). The upper tube sheet (32) is fixedly connected to the upper end of the shell-side outer cylinder (31), and the lower tube sheet (33) is fixedly connected to the lower end of the shell-side outer cylinder (31). After the upper tube sheet (32), the lower tube sheet (33) and the shell-side outer cylinder (31) are assembled and fixed together, a shell-side heating cavity is formed, and all the heat exchange tubes (34) are located in the shell-side heating cavity; A shell-side steam inlet extension pipe (4), a shell-side condensate outlet extension pipe (5), a direct-through steam inlet extension pipe (6) and a material outlet extension pipe (7) are fixedly arranged at the lower end of the slag discharge door (1). The inner port of the shell-side steam inlet extension pipe (4) is communicated with the side surface of the shell-side heating cavity, and the inner port of the shell-side condensate outlet extension pipe (5) is communicated with the side surface or the bottom of the shell-side heating cavity. The inner port of the direct-through steam inlet extension pipe (6) is communicated with the direct-through steam distribution plate (2), and the inner port of the material outlet extension pipe (7) is communicated with the bottom of the heating cavity (11).

2. The bottom tube heating device of an extraction tank according to claim 1, characterized in that: A upper through hole is vertically arranged at the position of the upper port of each heat exchange tube (34) on the upper tube sheet (32), and the upper end of each heat exchange tube (34) is inserted into the aligned upper through hole; A lower through hole is vertically arranged at the position of the lower port of each heat exchange tube (34) on the lower tube sheet (33), and the lower end of each heat exchange tube (34) is inserted into the aligned lower through hole.

3. The bottom tube heating device of an extraction tank according to claim 2, characterized in that: A plurality of support round steel bars are arranged between the lower tube sheet (33) and the inner wall surface of the slag discharge door (1). The lower ends of the support round steel bars are fixedly connected to the inner wall surface of the slag discharge door (1), and the upper ends of the support round steel bars are fixedly connected to the lower tube sheet (33).

4. The bottom tube heating device of an extraction tank according to claim 3, characterized in that: A plurality of positioning brackets are arranged between the direct-through steam distribution plate (2) and the inner wall surface of the slag discharge door (1), and the direct-through steam distribution plate (2) is fixed by the positioning brackets.

5. The bottom tube heating device of an extraction tank according to claim 4, characterized in that: Connecting flanges are integrally arranged at the lower ends of the shell-side steam inlet extension pipe (4), the shell-side condensate outlet extension pipe (5), the direct-through steam inlet extension pipe (6) and the material outlet extension pipe (7).

6. The bottom tube heating device of an extraction tank according to claim 1 or 5, characterized in that: The upper tube sheet (32) is fixedly connected to the upper end of the inner wall surface of the slag discharge door (1) by bolts.

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