A fraction recovery device for producing m-bromobenzaldehyde

Abstract

The utility model belongs to the technical field of m-bromobenzaldehyde production equipment, specifically a fraction recovery device for producing m-bromobenzaldehyde, including a raw material pre-storage box, a glass top cover, and a water cooling system; a downwardly recessed inner groove is provided on the top of the raw material pre-storage box, and the glass top cover is sealed and fixedly installed on the top of the raw material pre-storage box, so that the glass top cover and the inner groove form a steam liquefaction chamber; a steam inlet pipe is fixedly connected to one end of the steam liquefaction chamber, and the steam inlet pipe obtains m-bromobenzaldehyde steam from a fractionation container. The utility model can better realize heat exchange by closely arranging the raw material pre-storage box and the steam liquefaction chamber, that is, preheating the raw material solution inside the raw material pre-storage box by the newly liquefied m-bromobenzaldehyde, thereby improving the heat pass rate and reducing the production cost of m-bromobenzaldehyde.

Description

Technical Field

[0001] The utility model belongs to the technical field of m-bromobenzaldehyde production equipment, in particular to a fraction recovery device for producing m-bromobenzaldehyde. Background Art

[0002] There are many ways to synthesize m-bromobenzaldehyde in the prior art, but basically the last step is the distillation and purification of m-bromobenzaldehyde. m-bromobenzaldehyde can be vaporized at about 80°C, so it can be distilled at a constant temperature, and the fraction can be liquefied and recovered to obtain high-purity m-bromobenzaldehyde.

[0003] In the preparation process of m-bromobenzaldehyde in the chemical industry, the heat conversion rate needs to be considered. However, the heat conversion rate of the fraction recovery structure in the prior art is generally low. Summary of the invention

[0004] The utility model aims to provide a fraction recovery device for producing meta-bromobenzaldehyde, which improves the heat passing rate and thus reduces the production cost of meta-bromobenzaldehyde.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] Provided is a fraction recovery device for producing m-bromobenzaldehyde, comprising:

[0007] A raw material pre-storage box, wherein the top of the raw material pre-storage box is concave downward to form an inner groove;

[0008] A glass top cover, wherein the glass top cover is sealed and fixedly installed on the top of the raw material pre-storage box, and the glass top cover and the inner groove form a steam liquefaction chamber;

[0009] Water cooling system;

[0010] One end of the steam liquefaction chamber is fixedly connected with a steam inlet pipe, and the steam inlet pipe obtains m-bromobenzaldehyde steam from the fractionation container.

[0011] Optionally, a liquid inlet interface and a liquid outlet interface are provided on the side of the raw material pre-storage box, and the liquid outlet interface of the raw material pre-storage box supplies the preheated m-bromobenzaldehyde solution to the fractionation container.

[0012] Optionally, the glass top cover is wavy in shape, and a spoiler is provided inside the steam liquefaction chamber.

[0013] Optionally, the water cooling system comprises: a cold water tank, a circulating water tank, a water flow channel, a return pipe and a circulating pump;

[0014] The position of the cold water tank is higher than the height of the circulating water tank, and the water flow channel is arranged between the cold water tank and the circulating water tank. The shape of the water flow channel is adapted to the top shape of the glass top cover so that the water flow channel can fit tightly on the top of the glass top cover. The return pipe is installed between the cold water tank and the circulating water tank, and a circulating pump is installed on the return pipe.

[0015] Optionally, a steam exhaust pipe is provided at one end of the steam liquefaction chamber away from the steam inlet pipe, the end of the steam exhaust pipe is closed, and an arc pipe is fixedly connected to the side of the steam exhaust pipe, a reflux pump is installed on the arc pipe, and the liquid outlet end of the arc pipe is connected to a first branch pipe and a second branch pipe through a tee, one end of the first branch pipe is connected to the steam inlet pipe, and the second branch pipe is connected to the raw material pre-storage box.

[0016] Optionally, a reverse flow valve is provided on the second branch pipe.

[0017] Optionally, the flow direction of the airflow at the end of the first branch pipe is consistent with the flow direction of the m-bromobenzaldehyde vapor inside the steam inlet pipe.

[0018] Optionally, a steam exhaust pipe is provided on one side of the steam liquefaction chamber.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model arranges the raw material pre-storage box closely with the steam liquefaction chamber so as to achieve better heat exchange, that is, the raw material solution inside the raw material pre-storage box is preheated by the newly liquefied meta-bromobenzaldehyde (generally at a temperature of 60-70° C.), thereby improving the heat passing rate and reducing the production cost of the meta-bromobenzaldehyde. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 This is a front view structural schematic diagram of the utility model;

[0024] Figure 3 It is a side view structural schematic diagram of the utility model;

[0025] Figure 4 It is a schematic diagram of the top view structure of the utility model;

[0026] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0027] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at point A in the middle.

[0028] In the figure: 1. raw material pre-storage box; 101. liquid inlet interface; 102. liquid outlet interface; 2. inner groove; 3. glass top cover; 4. steam inlet pipe; 5. steam outlet pipe; 6. spoiler; 7. reflux pump; 8. first branch pipe; 9. second branch pipe; 10. arc pipe; 11. water flow channel; 12. cold water tank; 13. circulating water tank; 14. reflux pipe; 15. circulating pump. DETAILED DESCRIPTION

[0029] In order to make the technical problem to be solved by the present invention, the technical solution and the beneficial effects more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the orientations or positional relationships indicated by the terms "length" - "width" - "up" - "down" - "front" - "back" - "left" - "right" - "vertical" - "horizontal" - "top" - "bottom" - "inside" - "outside" etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation - be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first"-"second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first"-"second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] The fraction recovery device for producing m-bromobenzaldehyde provided by the embodiment of the utility model is now described. Figure 1-Figure 6A fraction recovery device for producing meta-bromobenzaldehyde comprises: a raw material pre-storage box 1, a glass top cover 3, and a water cooling system. The top of the raw material pre-storage box 1 is provided with an inner groove 2 which is recessed downward, and the glass top cover 3 is sealed and fixedly installed on the top of the raw material pre-storage box 1, so that the glass top cover 3 and the inner groove 2 form a steam liquefaction cavity, and the water cooling system cools the glass top cover 3. A steam inlet pipe 4 is fixedly connected to one end of the steam liquefaction cavity, and the steam inlet pipe 4 obtains the meta-bromobenzaldehyde vapor from the fractionation container.

[0034] Compared with the prior art, the fraction recovery device for producing meta-bromobenzaldehyde provided by the utility model can achieve better heat exchange by closely arranging the raw material pre-storage box 1 and the steam liquefaction chamber, that is, the raw material solution inside the raw material pre-storage box 1 is preheated by the newly liquefied meta-bromobenzaldehyde (generally at a temperature of 60-70° C.), thereby improving the heat transmission rate and reducing the production cost of meta-bromobenzaldehyde.

[0035] In another embodiment of the present invention, please refer to Figure 3 A liquid inlet interface 101 and a liquid outlet interface 102 are provided on the side of the raw material pre-storage box 1. The liquid outlet interface 102 of the raw material pre-storage box 1 supplies the preheated m-bromobenzaldehyde solution to the fractionation container, that is, the prepared m-bromobenzaldehyde mixed liquid is transported from the liquid inlet interface 101 into the interior of the raw material pre-storage box 1, and after preheating, it is discharged from the liquid outlet interface 102 and sent to the fractionation container, and heated inside the fractionation container (the fractionation container is generally heated by a constant temperature water bath, heated to 80°C, and m-bromobenzaldehyde vaporizes at 80°C) to form m-bromobenzaldehyde vapor.

[0036] In another embodiment of the present invention, please refer to Figure 5 The glass top cover 3 is wavy in shape, which is used to increase the cooling contact surface of the water cooling system on the glass top cover 3. A spoiler 6 is provided inside the steam liquefaction chamber to disturb the internal steam airflow so that the steam can fully contact the inner wall of the glass top cover 3.

[0037] In another embodiment of the present invention, refer to Figure 1 The water cooling system includes: a cold water tank 12, a circulating water tank 13, a water flow channel 11, a return pipe 14 and a circulating pump 15.

[0038] The position of the cold water tank 12 is higher than the height of the circulating water tank 13. The water flow channel 11 is arranged between the cold water tank 12 and the circulating water tank 13. The shape of the water flow channel 11 is adapted to the top shape of the glass top cover 3, so that the water flow channel 11 can fit tightly on the top of the glass top cover 3. The return pipe 14 is installed between the cold water tank 12 and the circulating water tank 13, and a circulating pump 15 is installed on the return pipe 14.

[0039] When in use, a refrigerator can also be installed inside the cold water tank 12 to ensure that the water temperature in the cold water tank 12 is stable. The cold water inside the cold water tank 12 flows into the return pipe 14 through the water flow channel 11 (the position of the cold water tank 12 is higher than the height of the circulating water tank 13, and the water can flow by its own weight). The cold water is in full contact with the glass top cover 3 in the water flow channel 11, thereby cooling and liquefying the steam on the inner side of the glass top cover 3; when the circulating pump 15 is working, the water in the circulating water tank 13 is pumped into the cold water tank 12, and the circulating water tank 13 can adopt an intermittent working mode.

[0040] In another embodiment of the present invention, please refer to Figure 5 A steam exhaust pipe 5 is provided at one end of the steam liquefaction chamber away from the steam inlet pipe 4, the end of the steam exhaust pipe 5 is closed, and an arc pipe 10 is fixedly connected to the side of the steam exhaust pipe 5, a reflux pump 7 is installed on the arc pipe 10, and a first branch pipe 8 and a second branch pipe 9 are connected to the liquid outlet end of the arc pipe 10 through a tee, one end of the first branch pipe 8 is connected to the steam inlet pipe 4, and the second branch pipe 9 is connected to the raw material pre-storage box 1.

[0041] When the reflux pump 7 is working, the air inside the steam liquefaction chamber is extracted (hot air, and some meta-bromobenzaldehyde vapor is mixed in the hot air), and then flows into the first branch pipe 8 and the second branch pipe 9 after passing through the arc pipe 10. The hot air in the first branch pipe 8 enters the steam inlet pipe 4, accelerates the flow of steam inside the steam inlet pipe 4, and forms a negative pressure at the port position of the steam inlet pipe 4, which can better absorb the meta-bromobenzaldehyde vapor generated in the distillation container into the steam inlet pipe 4. The hot air in the second branch pipe 9 enters the raw material pre-storage box 1 to preheat the liquid inside the raw material pre-storage box 1.

[0042] In another embodiment of the utility model, a backflow valve is provided on the second branch pipe 9 to prevent the liquid in the raw material pre-storage box 1 from flowing back into the second branch pipe 9 .

[0043] In another embodiment of the present invention, refer to Figure 5 The flow direction of the airflow at the end of the first branch pipe 8 is consistent with the flow direction of the m-bromobenzaldehyde vapor inside the steam inlet pipe 4 , and the airflow ejected from the end of the first branch pipe 8 can accelerate the flow of the m-bromobenzaldehyde vapor flow inside the steam inlet pipe 4 .

[0044] In another embodiment of the present invention, please refer to Figure 5 A steam exhaust pipe 5 is provided on one side of the steam liquefaction chamber. The steam exhaust pipe 5 is installed on the inner groove 2 or the glass top cover 3, so that one end of the steam exhaust pipe 5 is connected to the interior of the steam liquefaction chamber, so that the m-bromobenzaldehyde in the steam liquefaction chamber can be discharged through the steam exhaust pipe 5 (or an external pump can be set to extract it).

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fraction recovery device for producing m-bromobenzaldehyde, characterized in that: include: A raw material pre-storage box (1), wherein the top of the raw material pre-storage box (1) is recessed downward to form an inner groove (2); A glass top cover (3), wherein the glass top cover (3) is sealed and fixedly installed on the top of the raw material pre-storage box (1), and the glass top cover (3) and the inner groove (2) form a steam liquefaction chamber; Water cooling system; One end of the steam liquefaction chamber is fixedly connected to a steam inlet pipe (4), and the steam inlet pipe (4) obtains meta-bromobenzaldehyde steam from the fractionation container.

2. The fraction recovery device for producing meta-bromobenzaldehyde as claimed in claim 1, characterized in that: The side of the raw material pre-storage box (1) is provided with a liquid inlet interface (101) and a liquid outlet interface (102), and the liquid outlet interface (102) of the raw material pre-storage box (1) supplies the preheated m-bromobenzaldehyde solution to the fractionation container.

3. The fraction recovery device for producing m-bromobenzaldehyde as claimed in claim 1, characterized in that: The glass top cover (3) is wavy in shape, and a spoiler (6) is arranged inside the steam liquefaction chamber.

4. The fraction recovery device for producing m-bromobenzaldehyde according to claim 1, characterized in that: The water cooling system comprises: a cold water tank (12), a circulating water tank (13), a water flow channel (11), a return pipe (14) and a circulating pump (15); The position of the cold water tank (12) is higher than the height of the circulating water tank (13); the water flow channel (11) is arranged between the cold water tank (12) and the circulating water tank (13); the shape of the water flow channel (11) is adapted to the top shape of the glass top cover (3), so that the water flow channel (11) can be tightly fitted on the top of the glass top cover (3); the return pipe (14) is installed between the cold water tank (12) and the circulating water tank (13), and a circulating pump (15) is installed on the return pipe (14).

5. The fraction recovery device for producing m-bromobenzaldehyde according to claim 1, characterized in that: A steam discharge pipe (5) is provided at one end of the steam liquefaction chamber away from the steam inlet pipe (4); the end of the steam discharge pipe (5) is closed, and a side of the steam discharge pipe (5) is fixedly connected to an arc-shaped pipe (10); a reflux pump (7) is installed on the arc-shaped pipe (10); a liquid outlet end of the arc-shaped pipe (10) is connected to a first branch pipe (8) and a second branch pipe (9) through a tee; one end of the first branch pipe (8) is connected to the steam inlet pipe (4), and the second branch pipe (9) is connected to a raw material pre-storage box (1).

6. The fraction recovery device for producing m-bromobenzaldehyde as claimed in claim 5, characterized in that: The second branch pipe (9) is provided with a reverse flow valve.

7. The fraction recovery device for producing m-bromobenzaldehyde as claimed in claim 5, characterized in that: The flow direction of the airflow at the end of the first branch pipe (8) is consistent with the flow direction of the m-bromobenzaldehyde vapor inside the steam inlet pipe (4).

8. The fraction recovery device for producing m-bromobenzaldehyde according to claim 1, characterized in that: A steam exhaust pipe (5) is provided on one side of the steam liquefaction chamber.

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