CN219185836U

CN219185836U - Alkali liquor preheating device

Info

Publication number: CN219185836U
Application number: CN202223420063.1U
Authority: CN
Inventors: 刘建平; 钟利忠; 王蓉; 郭亮亮
Original assignee: Baoji Jinkate Manufacturing Engineering Co ltd
Current assignee: Baoji Jinkate Manufacturing Engineering Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-06-16
Anticipated expiration: 2032-12-20

Abstract

The utility model provides an alkali liquor preheating device, which relates to the technical field of alkali liquor production, and comprises: the box, the internally mounted of box has the preheating sleeve, the internally mounted of preheating sleeve has rather than coaxial preheating tube, install the heat exchange tube between preheating sleeve and the preheating tube, preheating sleeve and preheating tube are hollow structure. The condition that the initial temperature of the alkali liquor is low, so that the temperature rise of the alkali liquor is slow due to the fact that the alkali liquor is heated, water in the alkali liquor cannot be fully changed into steam, and the concentration effect and efficiency of the alkali liquor are reduced is avoided.

Description

Alkali liquor preheating device

Technical Field

The utility model relates to the technical field of alkali liquor production, in particular to an alkali liquor preheating device.

Background

At present, alkali liquor needs to be concentrated during production, the alkali liquor is generally added into a falling film concentrator in the prior art, then the alkali liquor flows uniformly in a film shape from top to bottom under the action of gravity, vacuum induction and air flow of the alkali liquor, in the flowing process, the water in the alkali liquor is heated and vaporized by a shell side heating medium, and the generated steam and liquid phase enter a separation chamber of an evaporator together for separation, so that the concentration of the alkali liquor is finished, but the concentration effect is poor, and the estimated effect cannot be achieved.

The research and analysis of the concentration process show that the concentration effect is poor because the initial temperature of the alkali liquor is low, so that the alkali liquor is heated to cause the temperature rise to be slower, water in the alkali liquor can not be fully changed into steam, and the concentration effect of the alkali liquor is reduced.

Disclosure of Invention

The utility model aims to provide an alkali liquor preheating device, which aims to solve the problems that in the prior art, alkali liquor is not preheated, so that the initial temperature of the alkali liquor is low, the temperature rise of the alkali liquor is low due to heating of the alkali liquor, water in the alkali liquor can not be fully changed into steam, and the concentration effect of the alkali liquor is reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the alkali liquor preheating device comprises: the box, the internally mounted of box has the preheating sleeve, the internally mounted of preheating sleeve has rather than coaxial preheating tube, install the heat exchange tube between preheating sleeve and the preheating tube, preheating sleeve and preheating tube are hollow structure.

According to a further technical scheme, a communicating pipe is connected between two sides of the bottom of the outer wall of the preheating pipe and the preheating sleeve, two ends of the communicating pipe are respectively communicated with the preheating sleeve and the hollow groove of the preheating pipe, an air inlet pipe is arranged at the bottom of one side of the outer wall of the box body, and one end of the air inlet pipe extends into the box body and is communicated with the hollow groove of the preheating sleeve.

According to a further technical scheme, the heat exchange tube is a spiral tube wound on the outer side of the preheating tube, the top end of the heat exchange tube is connected with a liquid inlet tube, the bottom end of the heat exchange tube is connected with a liquid outlet tube, and the top end of the liquid inlet tube and the bottom end of the liquid outlet tube penetrate through the box body.

According to a further technical scheme, the preheating sleeve is characterized in that a plurality of first air distribution holes are formed in the inner wall of the preheating sleeve and are uniformly distributed on the inner wall of the preheating sleeve and are communicated with hollow grooves in the preheating sleeve, a plurality of second air distribution holes are formed in the outer wall of the preheating pipe and are uniformly distributed on the outer wall of the preheating pipe and are communicated with the hollow grooves in the preheating pipe.

According to the further technical scheme, at least two connecting blocks are fixedly connected between the top and the bottom of the outer wall of the preheating sleeve and the inner wall of the box body, and the plurality of connecting blocks are uniformly distributed along the circumferential direction of the preheating sleeve.

According to a further technical scheme, a drain pipe and an exhaust pipe are fixedly arranged at the top of one side of the outer wall of the box body and respectively, and are communicated with the inside of the box body.

The beneficial effects of the utility model are as follows:

1. when the alkali liquor is preheated, the alkali liquor is discharged into the heat exchange tube through the liquid inlet tube, and meanwhile, steam tail gas discharged from the falling film concentrator is led into the preheating sleeve and the preheating tube through the air inlet tube and the communicating tube, at the moment, the steam is sprayed to the heat exchange tube through the first air distribution holes and the second air distribution holes and exchanges heat with alkali liquor in the heat exchange tube, so that the alkali liquor is preheated, the preheated alkali liquor is discharged into the falling film concentrator through the liquid discharge tube to be concentrated, the initial temperature of the alkali liquor is prevented from being lower, the alkali liquor is heated to cause slower temperature rise, water in the alkali liquor can not be fully changed into steam, and the concentration effect and efficiency of the alkali liquor are reduced.

2. When the steam tail gas carries out heat exchange and preheating to alkali liquor, the heat of the steam tail gas is exchanged for the alkali liquor at the moment, so that the temperature of the steam tail gas is reduced, the steam in the steam tail gas is condensed, liquefied and dripped to the bottom of the box body, then discharged through the drain pipe, and the rest of steam rises to the top of the box body and is led into the heating device of the falling film concentrator through the exhaust pipe to be reheated and then is concentrated, so that the device can recycle the heat of the steam tail gas of the falling film concentrator and dry the heat of the steam tail gas, and energy is saved.

Drawings

Fig. 1 is a schematic structural view of an embodiment of the present utility model.

Fig. 2 is a schematic view of the structure of the preheating assembly of the present utility model.

Fig. 3 is a schematic structural view of the preheating jacket of the present utility model.

In the figure: 10. a case; 11. a drain pipe; 12. an exhaust pipe; 13. an air inlet pipe; 14. a liquid discharge pipe; 15. a liquid inlet pipe; 20. preheating the jacket; 201. a first air distribution hole; 21. a connecting block; 22. a preheating tube; 221. a second air distribution hole; 23. a communicating pipe; 24. a heat exchange tube.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings.

An alkali liquor preheating device, example 1, as shown in fig. 2, comprises: the box 10, the internally mounted of box 10 has preheating jacket 20, the internally mounted of preheating jacket 20 has rather than coaxial preheating pipe 22, install heat exchange tube 24 between preheating jacket 20 and the preheating pipe 22, heat exchange tube 24 is the spiral pipe of winding in the preheating pipe 22 outside, the top of heat exchange tube 24 is connected with feed liquor pipe 15, the top of feed liquor pipe 15 runs through box 10, the bottom of heat exchange tube 24 is connected with fluid-discharge tube 14, fluid-discharge tube 14 is thermal-insulated heat preservation pipe, and its bottom runs through box 10 and is linked together with the feed inlet of falling film concentrator.

A communicating pipe 23 is connected between the two sides of the bottom of the outer wall of the preheating pipe 22 and the preheating sleeve 20, two ends of the communicating pipe 23 are respectively communicated with the preheating sleeve 20 and the hollow groove of the preheating pipe 22, an air inlet pipe 13 is arranged at the bottom of one side of the outer wall of the box body 10, one end of the air inlet pipe 13 extends into the box body 10 and is communicated with the hollow groove of the preheating sleeve 20, and the other end of the air inlet pipe 13 is communicated with the steam outlet of the falling film concentrator.

As shown in fig. 3, the preheating sleeve 20 and the preheating pipe 22 are hollow structures, the inner wall of the preheating sleeve 20 is provided with a plurality of first air distribution holes 201, the first air distribution holes 201 are uniformly distributed on the inner wall of the preheating sleeve 20 and are communicated with the hollow groove inside the preheating sleeve, the outer wall of the preheating pipe 22 is provided with a plurality of second air distribution holes 221, and the second air distribution holes 221 are uniformly distributed on the outer wall of the preheating pipe 22 and are communicated with the hollow groove inside the preheating pipe 22.

In this embodiment, when the alkali liquor is preheated, the alkali liquor is discharged into the heat exchange tube 24 through the liquid inlet tube 15, and meanwhile, the steam tail gas discharged from the falling film concentrator is led into the preheating sleeve 20 and the preheating tube 22 through the air inlet tube 13 and the communicating tube 23, at this time, the steam is sprayed to the heat exchange tube 24 through the first air distribution holes 201 and the second air distribution holes 221 and exchanges heat with the alkali liquor in the heat exchange tube 24, so that the alkali liquor is preheated, the preheated alkali liquor is discharged into the falling film concentrator through the liquid discharge tube 14 for concentration, thereby avoiding the condition that the initial temperature of the alkali liquor is lower, leading the alkali liquor to be heated to have slower temperature rise, leading the water in the alkali liquor to be insufficiently changed into steam, and reducing the concentration effect and efficiency of the alkali liquor.

In embodiment 2, as shown in fig. 1, at least two connection blocks 21 are fixedly connected between the top and bottom of the outer wall of the preheating sleeve 20 and the inner wall of the box 10, the plurality of connection blocks 21 are uniformly distributed along the circumferential direction of the preheating sleeve 20, a drain pipe 11 and an exhaust pipe 12 are fixedly installed at the top and top of one side of the outer wall of the box 10, and the drain pipe 11 and the exhaust pipe 12 are communicated with the inside of the box 10.

In this embodiment, when the steam tail gas carries out heat exchange and preheating to alkali liquor, the heat of the steam tail gas is exchanged for alkali liquor at this moment, so that the temperature of the alkali liquor is reduced, the steam in the steam tail gas is condensed, liquefied and dripped to the bottom of the box 10, and then discharged through the drain pipe 11, and meanwhile, the rest of steam rises to the top of the box 10 and is led into the heating device of the falling film concentrator through the exhaust pipe 12 for reheating and then carrying out alkali liquor concentration, so that the device can recycle the heat of the steam tail gas of the falling film concentrator and dry the steam tail gas, thereby saving energy.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. An alkali liquor preheating device, characterized by comprising: the box (10), the internally mounted of box (10) has preheating sleeve (20), the internally mounted of preheating sleeve (20) has rather than coaxial preheating tube (22), install heat exchange tube (24) between preheating sleeve (20) and preheating tube (22), preheating sleeve (20) and preheating tube (22) are hollow structure.

2. The alkali liquor preheating device according to claim 1, characterized in that a communicating pipe (23) is connected between two sides of the bottom of the outer wall of the preheating pipe (22) and the preheating sleeve (20), two ends of the communicating pipe (23) are respectively communicated with the preheating sleeve (20) and the hollow groove of the preheating pipe (22), an air inlet pipe (13) is arranged at the bottom of one side of the outer wall of the box body (10), and one end of the air inlet pipe (13) extends into the box body (10) and is communicated with the hollow groove of the preheating sleeve (20).

3. The alkali liquor preheating device according to claim 2, characterized in that the heat exchange tube (24) is a spiral tube wound on the outer side of the preheating tube (22), the top end of the heat exchange tube (24) is connected with a liquid inlet tube (15), the bottom end of the heat exchange tube (24) is connected with a liquid discharge tube (14), and the top end of the liquid inlet tube (15) and the bottom end of the liquid discharge tube (14) both penetrate through the box body (10).

4. The alkali liquor preheating device according to claim 3, wherein the inner wall of the preheating sleeve (20) is provided with a plurality of first air distribution holes (201), the first air distribution holes (201) are uniformly distributed on the inner wall of the preheating sleeve (20) and are communicated with the hollow groove inside the preheating sleeve, the outer wall of the preheating pipe (22) is provided with a plurality of second air distribution holes (221), and the second air distribution holes (221) are uniformly distributed on the outer wall of the preheating pipe (22) and are communicated with the hollow groove inside the preheating pipe.

5. The alkali liquor preheating device according to claim 2, wherein at least two connecting blocks (21) are fixedly connected between the top and the bottom of the outer wall of the preheating sleeve (20) and the inner wall of the box body (10), and a plurality of connecting blocks (21) are uniformly distributed along the circumferential direction of the preheating sleeve (20).

6. The lye preheating device according to any one of claims 1 to 5, wherein a drain pipe (11) and an exhaust pipe (12) are fixedly installed at the top of one side and the top of the outer wall of the tank body (10), respectively, and the drain pipe (11) and the exhaust pipe (12) are communicated with the inside of the tank body (10).