Glyoxylic acid reaction kettle heating device

Abstract

The utility model discloses a glyoxylic acid reaction kettle heating device which comprises a tank body with openings at the upper end and the lower end, a feeding pipe and a discharging pipe are arranged on the tank body, the upper end and the lower end of the tank body are fixedly covered with sealing cover assemblies, annular cavities are formed in the sealing cover assemblies, and the sealing cover assemblies are arranged in the annular cavities. A plurality of sealing cover assemblies are arranged in the tank body, a plurality of steam heat pipes are connected between the two sealing cover assemblies, steam outer pipes are connected to the sealing cover assemblies, the steam outer pipes are communicated with the steam heat pipes, and a dirt scraping and stirring assembly is arranged in the tank body; the reaction kettle has the beneficial effects that the reaction kettle with an internal heating heat pipe structure is high in heating speed, more uniform in heating and beneficial to rapid reaction, so that the production efficiency is improved, the dirt scraping and stirring component is designed to clean the heat pipe, and meanwhile, the dirt scraping and stirring component has a spacing stirring function, so that the heat pipe structure is prevented from being damaged by the dirt scraping and stirring component. The efficient heat transfer efficiency is kept, and wide-range application and popularization are worthy.

Description

TECHNICAL FIELD

[0001] The utility model relates to a glyoxylic acid production equipment technical field especially relates to a kind of glyoxylic acid reaction kettle heating device. BACKGROUND

[0002] Glyoxylic acid is used as fragrance modifier and fixative in cosmetics, perfume in daily chemicals, and food flavoring agent. It is the raw material of vanillin, and also used as intermediate for medicine, dye, plastic and pesticide. Dichloroacetic acid method is a common method for preparing glyoxylic acid. The steps are as follows: sodium methoxide and methanol are put into the reaction tank, heated to 40-50℃, and dichloroacetic acid is slowly added. Sodium dimethoxyacetate methanol solution is prepared. The solution is concentrated to dryness under reduced pressure, and 2.8 parts of hydrochloric acid is added and heated on a water bath to prepare hydrolysate. After heating, cooling, filtering and separating, the finished product is obtained. In actual production process, steam jacket type reaction tank is often used. However, the heating method of this reaction kettle is peripheral heating. If the diameter of the reaction tank is large, uneven heating and slow heating speed may occur, and the reaction efficiency is low. Therefore, some enterprises use internal heat pipe type heating structure. However, the heat pipe is easy to scale after long time use, which reduces the heat transfer efficiency of the heat pipe. SUMMARY

[0003] The utility model aims at providing a kind of glyoxylic acid reaction kettle heating device to solve the technical problems of uneven heating, slow heating speed and easy scaling of heat pipe type reaction kettle in prior art.

[0004] The utility model relates to a kind of glyoxylic acid reaction kettle heating device, it includes the tank body that upper and lower ends are both open, be provided with feed pipe, discharge pipe on the tank body, the upper and lower ends of the tank body are all fixed and covered with sealing cover assembly, be provided with annular cavity in the sealing cover assembly, be connected with several steam heat pipes between two sealing cover assemblies, be connected with steam outer tube on the sealing cover assembly, the steam outer tube is communicated with the steam heat pipe, be provided with scraping and stirring assembly in the tank body, the scraping and stirring assembly is used to scrape the dirt on the steam heat pipe and stirs the liquid in the tank body.

[0005] Further, the steam heat pipes are uniformly arranged along the circumferential direction of the tank body.

[0006] Further, the scraping and stirring assembly includes a lead screw, the top end of the lead screw is rotatably connected with the sealing cover assembly, the lead screw is drivingly connected with a servo motor, a lifting cylinder is drivingly connected to the lead screw, a plurality of helical blades are circumferentially arranged on the lifting cylinder, and a scraping cylinder is slidingly connected to the helical blades.

[0007] Furthermore, the sealing cap assembly includes a sealing cap, on which an annular groove is formed, and a cover plate is fixedly covered on the annular groove. Several through holes are evenly distributed along the circumferential direction at the bottom of the annular groove, and the through holes are connected to the steam heat pipe. The steam outer pipe is connected to the sealing cap, and the steam outer pipe is connected to the annular groove.

[0008] Furthermore, the sealing cap, the cover plate, and the tank body are fixedly connected by bolts.

[0009] Furthermore, sealing rings are provided between the sealing cap and the cover plate, between the sealing cap and the tank body, and between the sealing cap and the steam heat pipe.

[0010] The beneficial effects of this utility model are as follows: The reactor with an internally heated heat pipe structure designed in this utility model has a fast heating speed and more uniform heating, which is conducive to the rapid progress of the reaction, thereby improving production efficiency. It is also designed with a scraping and stirring component to clean the heat pipe. At the same time, the scraping and stirring component has a stirring function at intervals to prevent the heat pipe structure from being damaged and to maintain high heat transfer efficiency. It is worth promoting and using on a large scale. Attached image description:

[0011] Figure 1 This is a perspective view of the internal structure of this utility model;

[0012] Figure 2 A 3D view of the scraping and mixing assembly;

[0013] Figure 3 A 3D view of the sealing cap;

[0014] In the diagram, 1 is the tank body, 2 is the steam heat pipe, 3 is the sealing cover, 4 is the annular groove, 5 is the cover plate, 6 is the lead screw, 7 is the spiral blade, 8 is the lifting cylinder, 9 is the scraper, 10 is the feed pipe, 11 is the discharge pipe, 12 is the servo motor, 13 is the steam outer pipe, and 14 is the through hole. Detailed implementation method:

[0015] like Figure 1 As shown, a glyoxylic acid reactor heating device includes a tank 1 with openings at both the top and bottom. An inlet pipe 10 and an outlet pipe 11 are provided on the tank 1. Sealing cap assemblies are fixedly covering both the top and bottom of the tank 1. An annular cavity is provided within each sealing cap assembly. A plurality of steam heat pipes 2 are connected between two sealing cap assemblies. An external steam pipe 13 is connected to each sealing cap assembly and communicates with the steam heat pipes 2. A scraping and stirring assembly is provided inside the tank 1. This assembly is used to scrape away dirt from the steam heat pipes 2 and stir the liquid inside the tank 1. To improve heating uniformity, the steam heat pipes 2 are evenly arranged along the circumference of the tank 1.

[0016] As Figure 1 and Figure 2 shown, the scraping stirring assembly comprises arranged lead screws 6, the top ends of the lead screws 6 are rotationally connected with the sealing cover assembly, the lead screws 6 are drivingly connected with a servo motor 12, a lifting cylinder 8 is drivingly connected on the lead screws 6, a plurality of helical blades 7 are connected on the lifting cylinder 8 in a circumferential direction, a scraping cylinder 9 is connected on the helical blades 7, and the scraping cylinder 9 is slidingly connected with the steam heat pipe 2.

[0017] As Figure 1 and Figure 3 shown, the sealing cover assembly comprises a sealing cover 3, an annular groove 4 is formed on the sealing cover 3, a cover plate 5 is fixedly covered on the annular groove 4, a plurality of through holes 14 are formed on the groove bottom of the annular groove 4 in a circumferential direction, the through holes 14 are in communication with the steam heat pipe 2, the steam outer pipe 13 is connected on the sealing cover 3, and the steam outer pipe 13 is in communication with the annular groove 4; in order to facilitate the maintenance disassembly of the equipment and improve the sealing performance of the equipment, the sealing cover 3, the cover plate 5 and the tank body 1 are fixedly connected through bolts; sealing rings are arranged between the sealing cover 3 and the cover plate 5, between the sealing cover 3 and the tank body 1, and between the sealing cover 3 and the steam heat pipe 2.

[0018] Specifically, as Figures 1 to 3 shown, during the process, the forward and reverse rotation of the servo motor 12 at equal time intervals can make the scraping stirring assembly reciprocate up and down, so that the steam heat pipe 2 can be cleaned in time, and the reaction liquid in the tank body 1 can be stirred (because the helical blades 7 have an inclination angle, so that the helical blades 7 have both upward and downward stirring functions and radial stirring functions when moving up and down), so that the temperature distribution is uniform; during the process, steam enters from the bottom steam outer pipe 13, then sequentially flows through the annular groove 4 at the bottom, the steam heat pipe 2, the annular groove 4 at the bottom, and finally is discharged from the top steam outer pipe 13, so as to provide a heating heat source for the equipment.

[0019] The above is only a preferred example of the present application, and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heating device for an oxalate reactor, characterized by: It includes the tank body (1) which both upper and lower ends are open, sets up the feed pipe (10), the discharge pipe (11) on the tank body (1), the upper and lower ends of the tank body (1) are fixed and covered with sealing cover assembly, sets up ring cavity in the sealing cover assembly, connects a plurality of steam heat pipe (2) between two sealing cover assemblies, connects steam outer pipe (13) on the sealing cover assembly, steam outer pipe (13) is communicated with steam heat pipe (2), sets up in the tank body (1) scraping dirty stirring assembly, the scraping dirty stirring assembly is used to scrape the dirt on the steam heat pipe (2) and stirs the liquid in the tank body (1).

2. The heating device for a glyoxylic acid reactor according to claim 1, characterized in that: The steam heat pipe (2) is evenly arranged along the circumferential direction of the tank body (1).

3. The heating device for a glyoxylic acid reactor according to claim 2, characterized in that: The scraping dirty stirring assembly includes the lead screw (6) arranged, the top end of the lead screw (6) is rotatably connected with the sealing cover assembly, the lead screw (6) is drivingly connected with the servo motor (12), the lifting cylinder (8) is drivingly connected on the lead screw (6), a plurality of helical blades (7) are connected on the lifting cylinder (8) along the circumferential direction, the scraping cylinder (9) is connected on the helical blade (7), the scraping cylinder (9) is slidingly connected with the steam heat pipe (2).

4. The heating device for a glyoxylic acid reactor according to claim 1, characterized in that: The sealing cover assembly includes the sealing cover (3), the ring groove (4) is formed on the sealing cover (3), the cover plate (5) is fixedly covered on the ring groove (4), a plurality of through holes (14) are evenly formed on the groove bottom of the ring groove (4) along the circumferential direction, the through holes (14) are communicated with the steam heat pipe (2), the steam outer pipe (13) is connected on the sealing cover (3), and the steam outer pipe (13) is communicated with the ring groove (4).

5. The heating device for a glyoxylic acid reactor according to claim 4, characterized in that: The sealing cover (3), the cover plate (5) and the tank body (1) are fixedly connected by bolts.

6. The heating device for a glyoxylic acid reactor according to claim 5, characterized in that: Sealing rings are arranged between the sealing cover (3) and the cover plate (5), between the sealing cover (3) and the tank body (1), and between the sealing cover (3) and the steam heat pipe (2).

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