Crystallization kettle

Abstract

The utility model relates to a crystallization kettle in the field of crystallization equipment, which comprises a kettle body provided with a feed port and a discharge port, and is characterized in that the feed port and the discharge port are both fixed at the upper part of the kettle body, the feed port is communicated with a material guide pipe, the material guide pipe is positioned in the kettle body, and an outlet of the material guide pipe is positioned at the bottom of the kettle body. The material guide pipe conveys materials to the bottom of the kettle body, it is guaranteed that newly-fed materials always start to move upwards from the bottom of the kettle body, it is guaranteed that materials newly entering the crystallization kettle are located at the bottom of the crystallization kettle, and original materials gradually move upwards along with adding of the newly-fed materials; according to the crystallization kettle, all materials entering the crystallization kettle can keep a moving track of moving from the bottom to the upper part, so that the retention time and the heating time of the materials entering the kettle body are uniform and consistent, the materials are uniformly mixed and fully reacted, and the reaction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crystallization equipment, in particular to a crystallization kettle suitable for producing molecular sieves. Background Art

[0002] Utility model patents 201420691896.8 and 201921131675.4 disclose a crystallization kettle for producing molecular sieves and a crystallization kettle with a waste heat utilization mechanism. When the crystallization kettle is performing crystallization operations, both adopt the form with the feed inlet at the upper part and the discharge outlet at the lower part. This structure has the following disadvantages: The materials that enter the crystallization kettle first are located at the bottom, and the materials that enter later accumulate at the upper part. The materials at the bottom stay under heating for a long time, while the materials at the upper part are under heating for a short time. It takes a long time to heat all the materials to the required temperature, and the efficiency is low. Especially for a crystallization kettle with a large capacity, the influence brought by this time difference is more obvious. Summary of the Utility Model

[0003] In order to solve the problems such as long heating time of materials, low efficiency, and insufficient reaction of materials caused by the feeding and discharging methods in the background art, the utility model provides a crystallization kettle with both the feed inlet and the discharge outlet at the upper part.

[0004] The technical solution of the utility model is as follows:

[0005] The crystallization kettle includes a kettle body 1, and a feed inlet 21 and a discharge outlet 3 are arranged on the kettle body 1. The special feature is that: both the feed inlet 21 and the discharge outlet 3 are fixed to the upper part of the kettle body. The feed inlet 21 is communicated with a material conduit 22, and the material conduit 22 is located inside the kettle body 1 and the outlet of the material conduit 22 is located at the bottom of the kettle body 1. The material conduit transports the material to the bottom of the kettle body, ensuring that the newly added material always moves upward from the bottom of the kettle body, ensuring the material

[0006] Preferably, the bottom of the material conduit 22 is fixed to the inside of the kettle body 1 through a material conduit support 23.

[0007] Preferably, at least one group of external heat conduction components is arranged outside the kettle body 1. The external heat conduction components include a spiral half-pipe inlet 61, a spiral half-pipe 62, and a spiral half-pipe outlet 63 that are sequentially communicated, and each group of external heat conduction components is connected in parallel.

[0008] Preferably, the cross-section of the spiral half-pipe 62 is semi-circular, and the arc surface where the diameter of the semi-circle is located faces the outer surface of the kettle body 1.

[0009] Preferably, an internal heat conduction component is arranged on the kettle body 1. The internal heat conduction component includes an internal heat conduction medium inlet 41, a spiral coil 44, and an internal heat conduction medium outlet 46 that are sequentially communicated, and the spiral coil 44 is located inside the kettle body 1.

[0010] Preferably, the internal heat conduction medium inlet 41 is communicated with three inlet branch pipes 43 through a first four-way pipe 42. The three inlet branch pipes are respectively communicated with three outlet branch pipes 45 through three spiral coiled pipes 44. The three outlet branch pipes 45 are communicated with the internal heat conduction medium outlet 46 through a second four-way pipe 47. The three spiral coiled pipes 44 are arranged on the outer wall of the kettle body 1 in sequence from top to bottom.

[0011] Preferably, a stirring shaft 7 is further arranged inside the crystallization kettle. A bottom bearing support 52 is fixed at the bottom of the kettle body 1. A bottom bearing 51 is fixed on the bottom bearing support 52. The bottom of the stirring shaft 7 is movably connected with the bottom bearing 51.

[0012] The advantages of the present utility model are as follows:

[0013] (1) The feed inlet is at the upper part, and the outlet of the material conduit communicated with the feed inlet is located at the bottom of the crystallization kettle. By using the gravity of the material itself, the material falls to the bottom of the crystallization kettle. The newly entered material in the crystallization kettle is located at the bottom of the crystallization kettle. As the newly added material is added, the original material gradually moves upward, so that all the materials entering the crystallization kettle can maintain the movement track from the bottom to the upper part, thereby ensuring the residence time of the materials entering the kettle body, making the heating time of the materials uniform, and the materials are evenly mixed and fully reacted, improving the reaction efficiency.

[0014] (2) The external heat conduction components and the internal heat conduction components are in multiple groups in parallel, thereby reducing the temperature difference between the upper and lower parts of the kettle body, especially suitable for large-capacity kettle bodies. The temperature inside the kettle body is more uniform, improving the heating efficiency and the reaction efficiency.

[0015] (3) For a large-capacity kettle body, the bottom of the stirring shaft is connected to the inside of the kettle body through a bottom bearing, improving the balance and stability of the stirring shaft, especially suitable for large-capacity crystallization kettles. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0017] Wherein: 1 - kettle body; 21 - feed inlet; 22 - material conduit; 23 - material conduit support; 3 - discharge outlet; 41 - internal heat conduction medium inlet; 42 - first four-way pipe; 43 - inlet branch pipe; 44 - spiral coiled pipe; 45 - outlet branch pipe; 46 - internal heat conduction medium outlet; 47 - second four-way pipe; 51 - bottom bearing; 52 - bottom bearing support; 61 - spiral half pipe inlet; 62 - spiral half pipe; 63 - spiral half pipe outlet; 7 - stirring shaft; 8 - manhole; 9 - bottom drain port. Detailed Embodiments

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0019] As shown Figure 1 in the figure, the crystallization kettle includes a kettle body 1, and a feed inlet 21, a discharge outlet 3, a stirring shaft 7, a manhole 8, a bottom drain port 9, an external heat conduction component, an internal heat conduction component, etc. are arranged on the kettle body 1.

[0020] Both the feed inlet 21 and the discharge outlet 3 are fixed to the upper part of the kettle body 1. The feed inlet 21 is communicated with a material conduit 22. The material conduit 22 is located inside the kettle body 1 and the outlet of the material conduit 22 is located at the bottom of the kettle body 1. The material conduit 22 conveys the material to the bottom of the kettle body 1, ensuring that the newly added material always moves upward from the bottom of the kettle body 1 and finally overflows from the discharge outlet 3, ensuring that the residence time of all materials in the kettle body 1 is uniform, the heating time of the materials is uniform, so as to ensure that the materials obtain uniform heat from the outside, the reaction is sufficient, and the reaction efficiency is improved.

[0021] In order to prevent the material from generating a thrust on the material conduit 22 under the action of the stirring shaft 7 and causing damage to the material conduit 22, preferably, the bottom of the material conduit 22 is fixed to the inside of the kettle body 1 through a material conduit support 23.

[0022] Preferably, at least one group of external heat conduction components is arranged outside the kettle body 1. The external heat conduction component includes a spiral half-pipe inlet 61, a spiral half-pipe 62 and a spiral half-pipe outlet 63 which are sequentially communicated, and hot steam is introduced into the external heat conduction component. Multiple groups of parallel external heat conduction components are provided to prevent the path of the spiral half-pipe 62 from being too long and the steam distribution from being unbalanced, thereby reducing the temperature difference between the upper and lower parts of the kettle body 1. It is especially suitable for large-capacity kettle bodies, and the temperature inside the kettle body 1 is more uniform, improving the heating efficiency and reaction efficiency.

[0023] Further preferably, the cross-section of the spiral half-pipe 62 is semi-circular, and the arc surface where the diameter of the semi-circle is located faces the outer surface of the kettle body 1. The semi-circular spiral half-pipe has a larger contact area and higher heating efficiency compared with a spiral pipe with a circular cross-section.

[0024] Preferably, an internal heat conduction component is arranged on the kettle body 1. The internal heat conduction component includes an internal heat conduction medium inlet 41, a spiral coil 44 and an internal heat conduction medium outlet 46 which are sequentially communicated, and the spiral coil 44 is located inside the kettle body 1.

[0025] Further preferably, the internal heat conduction medium inlet 41 is communicated with three inlet branch pipes 43 through a first four-way pipe 42. The three inlet branch pipes are respectively communicated with three outlet branch pipes 45 through three spiral coils 44. The three outlet branch pipes 45 are communicated with the internal heat conduction medium outlet 46 through a second four-way pipe 47; the three spiral coils 44 are arranged on the outer wall of the kettle body 1 in sequence from top to bottom. By arranging multiple inlet branch pipes, outlet branch pipes and spiral coils, it is avoided that the temperature difference between the inlet and outlet of a whole spiral pipe is large, resulting in uneven heating of the material.

[0026] A stirring shaft 7 is also arranged inside the crystallization kettle. For a crystallization kettle with a large volume, the stirring shaft is prone to swing under the resistance of the material, thus causing damage to the speed reducer. In the utility model, a bottom bearing support 52 is fixed at the bottom of the kettle body 1, and a bottom bearing 51 is fixed on the bottom bearing support 52. The bottom of the stirring shaft 7 is movably connected with the bottom bearing 51, so as to improve the balance and stability of the stirring shaft. The stirring shaft is preferably made of Stellite alloy, which is wear-resistant, acid and alkali resistant, corrosion resistant and high temperature resistant.

[0027] In the utility model, the feed inlet is at the upper part, and the outlet of the material conduit communicated with the feed inlet is located at the bottom of the crystallization kettle. By using the gravity of the material itself, the material falls to the bottom of the crystallization kettle. The newly entered material in the crystallization kettle is located at the bottom of the crystallization kettle. With the addition of the newly entered material, the original material gradually moves upward and overflows from the discharge port 3, so that all the materials entering the crystallization kettle can maintain the movement track from the bottom to the upper part, thus ensuring the residence time of the materials entering the kettle body, making the heating time of the materials uniform, and the materials are evenly mixed and fully reacted, improving the reaction efficiency.

[0028] The utility model can be used for the crystallization reaction of molecular sieve. During use, the feed inlet 21 conveys the material, and the liquid level gradually rises until a certain height, then the material conveying is stopped. The stirring shaft 7 preferably rotates when the material enters the crystallization kettle. Under the action of the heating steam in the crystallization kettle, the crystallization reaction starts. After the crystallization reaction ends, the material is continuously fed, and the liquid level continues to rise, and the solid-liquid mixture is discharged from the discharge port.

Claims

1. A crystallization kettle, comprising a kettle body (1), wherein the kettle body (1) is provided with a feed inlet (21) and a discharge outlet (3), characterized in that: The feed inlet (21) and the discharge port (3) are both fixed to the upper part of the kettle body; the feed inlet (21) is connected to a material conduit (22); the material conduit (22) is located inside the kettle body (1) and the outlet of the material conduit (22) is located at the bottom of the kettle body (1).

2. The crystallization kettle according to claim 1, characterized in that: The bottom of the material conduit (22) is fixed inside the kettle body (1) via a material conduit bracket (23).

3. The crystallization kettle according to claim 1 or 2, characterized in that: At least one group of external heat-conducting components is arranged outside the kettle body (1), and the external heat-conducting components include a spiral half-tube inlet (61), a spiral half-tube (62), and a spiral half-tube outlet (63) that are connected in sequence, and each group of external heat-conducting components is connected in parallel.

4. The crystallization kettle according to claim 3, characterized in that: The cross section of the spiral half tube (62) is semicircular, and the arc surface where the diameter of the semicircle is located faces the outer surface of the kettle body (1).

5. The crystallization kettle according to claim 4, characterized in that: The kettle body (1) is provided with an internal heat-conducting component, which comprises an internal heat-conducting medium inlet (41), a spiral coil (44) and an internal heat-conducting medium outlet (46) which are connected in sequence, and the spiral coil (44) is located inside the kettle body (1).

6. The crystallization kettle according to claim 5, characterized in that: The internal heat-conducting medium inlet (41) is connected to three inlet branch pipes (43) via a first four-way pipe (42); the three inlet branch pipes are respectively connected to three outlet branch pipes (45) via three spiral coils (44); the three outlet branch pipes (45) are connected to the internal heat-conducting medium outlet (46) via a second four-way pipe (47); the three spiral coils (44) are arranged in sequence from top to bottom on the outer wall of the kettle body (1).

7. The crystallization kettle according to claim 1 or 2, characterized in that: A stirring shaft (7) is also provided inside the crystallization kettle. A bottom bearing bracket (52) is fixed to the bottom of the kettle body (1). A bottom bearing (51) is fixed to the bottom bearing bracket (52). The bottom of the stirring shaft (7) is movably connected to the bottom bearing (51).

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