A concentration apparatus for nicotinamide production

Abstract

The utility model discloses a kind of concentration equipment for nicotinamide production, belong to nicotinamide production technical field.A kind of concentration equipment for nicotinamide production, including concentration kettle, the lower end of the concentration kettle is equipped with discharge gate, the upper end of concentration kettle is provided with preheating passage, preheating passage is used to utilize the secondary steam generated by concentration kettle to preheat material before entering concentration kettle;Preheating passage includes mutually adhering steam passage and material passage.The utility model discloses a kind of concentration equipment for nicotinamide production, by setting spiral coiled preheating passage, utilize the waste heat of high-temperature secondary steam generated in concentration process to preheat cold material that will enter concentration kettle, this fully recovers latent heat and sensible heat of steam, substantially reduces the energy required by concentration kettle main heating unit, effectively reduces the steam consumption and electric energy consumption of production process, operating cost is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the field of nicotinamide production technology, and more specifically, to a concentration device for nicotinamide production. Background Technology

[0002] Currently, conventional stirred-tank thickeners are commonly used in industrial production for concentration. These devices typically heat materials using built-in electric heating elements or jackets, and agitation ensures uniform heating. However, this traditional concentration method has significant drawbacks: First, the heating process consumes a large amount of electricity, resulting in low energy efficiency and high operating costs. Second, the large amount of secondary steam generated during concentration is usually directly condensed and discharged, failing to effectively recover its sensible and latent heat, leading to energy waste. Finally, for substances like nicotinamide that may be heat-sensitive, prolonged heating can pose a risk of localized overheating, affecting product quality.

[0003] Chinese patent CN208574231U discloses a concentration device for manufacturing nicotinamide, which uses a dual-cylinder evaporation method. Although this improves the concentration effect, the dual-cylinder method has a higher operating cost. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a concentration device for nicotinamide production to solve the above-mentioned deficiencies.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A concentration device for nicotinamide production includes a concentration vessel with a discharge port at the lower end and a preheating channel at the upper end. The preheating channel is used to preheat the material entering the concentration vessel using secondary steam generated by the concentration vessel. The preheating channel includes a steam channel and a material channel that are closely fitted together. The inlet of the steam channel is connected to the steam chamber of the concentration vessel, and the outlet of the material channel is connected to the feed port of the concentration vessel.

[0007] Preferably, both the steam channel and the material channel are spiral-wound channels, and the steam channel is located below the material channel.

[0008] Preferably, the lower end of the steam channel is provided with a steam inlet communicating with the top of the concentration kettle, the top end of the steam channel is provided with a one-way valve, and the lower end of the steam channel is provided with a condensate drain outlet.

[0009] Preferably, the concentrator is fitted with an insulated water tank, and the condensate drain outlet is connected to the inside of the insulated water tank.

[0010] Preferably, the material channel has a material inlet at the top and a discharge pipe leading to the inside of the concentration vessel at the bottom, with a control valve on the discharge pipe.

[0011] Preferably, the concentration vessel is equipped with a stirring motor at the top, the output end of which is connected to a stirring shaft extending into the vessel, the inner wall of the concentration vessel is equipped with an electric heating tube, and the top of the concentration vessel is also equipped with a pressure valve for controlling the pressure inside the concentration vessel.

[0012] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0013] This invention utilizes a spirally coiled preheating channel to preheat cold materials entering the concentration vessel using the residual heat of the high-temperature secondary steam generated during the concentration process. This fully recovers the latent and sensible heat of the steam, significantly reducing the energy required by the main heating unit of the concentration vessel, effectively lowering steam and electricity consumption in the production process, and significantly reducing operating costs. The preheating channel adopts a unique double-spiral structure design, with the steam channel located below the material channel and adhering to the wall. The steam spirals upward while the material spirals downward, forming a stable counter-current heat exchange with high heat transfer efficiency, uniform preheating, and maximum heat recovery. The condensate formed after the steam condenses in the preheating channel still has a temperature higher than the ambient temperature. This condensate is further circulated into an insulated water tank outside the concentration vessel, using its residual heat to insulate the vessel body, achieving a cascaded comprehensive utilization of thermal energy and avoiding any form of thermal energy waste. After the cold materials are preheated, they enter the concentration vessel, reducing the instantaneous heating load on the electric heating tubes inside the concentration vessel, making the heating process smoother and more stable, which helps ensure the uniformity of product quality and may extend the service life of the electric heating tubes. Attached Figure Description

[0014] Figure 1 This is an overall structural diagram of the concentration equipment for nicotinamide production according to this utility model;

[0015] Figure 2 This is an overall structural diagram of the preheating channel of this utility model;

[0016] Figure 3 This is a cross-sectional view of the preheating channel of this utility model.

[0017] In the diagram: 1. Concentrator; 11. Stirring motor; 12. Stirring shaft; 13. Electric heating element; 14. Pressure valve; 15. Insulated water tank; 16. Discharge port; 2. Preheating channel; 21. Steam channel; 211. Steam inlet; 212. Condensate outlet; 213. Check valve; 22. Material channel; 221. Material inlet; 222. Discharge pipe; 223. Control valve. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0020] Combination Figures 1-3 The present invention discloses a concentration device for the production of nicotinamide, including a concentration vessel 1. The lower end of the concentration vessel 1 is fixed by a support frame, and the upper end of the concentration vessel 1 is provided with a preheating channel 2. The preheating channel 2 uses water vapor generated in the concentration vessel 1 to preheat the material to be entered into the concentration vessel 1, thereby shortening the heating time of the material and making full use of the preheating of water vapor.

[0021] Specifically, a stirring motor 11 is installed at the upper end of the concentration vessel 1, and a stirring shaft 12 is fixedly connected to the output end of the stirring motor 11. The stirring motor 11 drives the stirring shaft 12 to rotate, which fully stirs the material in the concentration vessel 1 and ensures uniform heat distribution. An electric heating tube 13 is installed on the inner wall of the concentration vessel 1 to heat the material in the concentration vessel 1. A pressure valve 14 is also installed at the upper end of the concentration vessel 1. A heat preservation water tank 15 is installed on the outer wall of the concentration vessel 1. The heat preservation water tank 15 is used to keep the material in the concentration vessel 1 warm. A discharge port 16 is installed at the lower end of the concentration vessel 1 to discharge the concentrated material.

[0022] More specifically, the preheating channel 2 includes a steam channel 21 and a material channel 22. Both the steam channel 21 and the material channel 22 are spiral channels, and the steam channel 21 is located below the material channel 22. The upper sidewall of the steam channel 21 is in contact with the lower sidewall of the material channel 22. The water vapor in the steam channel 21 spirals upward and is in contact with the lower sidewall of the material channel 22 to preheat the material flowing downward.

[0023] It should be noted that a steam inlet 211 is provided on the inner wall of the lower end of the steam channel 21. The steam inlet 211 is fixedly connected to the upper end of the concentration vessel 1 and is used to introduce water vapor in the concentration vessel 1 into the steam channel 21. A condensate outlet 212 is provided at the lower end of the steam channel 21. The lower end of the condensate outlet 212 is connected to the heat preservation water tank 15. When the water vapor rising in the steam channel 21 encounters cold material, it condenses into water and flows downward along the steam channel 21. Finally, it enters the heat preservation water tank 15 through the condensate outlet 212. The residual temperature of the condensate keeps the material in the concentration vessel 1 warm. A one-way valve 213 is provided at the upper end of the steam channel 21.

[0024] Meanwhile, a material inlet 221 is provided at the uppermost end of the material channel 22, and a discharge pipe 222 connected to the concentration vessel 1 is provided at the lower end of the material channel 22. A control valve 223 is provided on the discharge pipe 222, and the timing of material entry is controlled by the control valve 223.

[0025] Working process: Start the stirring motor 11 to drive the stirring shaft 12 to rotate, turn on the electric heating tube 13 to heat and concentrate the initial batch of materials in the concentration vessel 1. After the materials are heated, secondary steam is generated. The steam rises and enters the steam channel 21 of the preheating channel 2 through the steam inlet 211. At this time, the control valve 223 is opened, and the cold material to be concentrated enters the material channel 22 from the material inlet 221. The high temperature steam spirals upward in the steam channel 21. Its heat passes through the pipe wall to continuously and evenly preheat the cold material spiraling downward in the adjacent material channel 22. The steam itself condenses into water due to heat exchange. The condensate flows along the steam channel 21 to the bottom and flows into the heat preservation water tank 15 through the condensate outlet 212. The residual heat is used to provide heat preservation for the concentration vessel 1. The preheated material enters the concentration vessel 1 through the discharge pipe 222. The system enters the continuous working state. The pressure in the concentration vessel 1 is automatically adjusted by the pressure control valve 14 to maintain a stable concentration environment. The concentrated product is discharged from the discharge port 16.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A concentration apparatus for nicotinamide production, comprising a concentration vessel (1), characterized in that, The lower end of the concentration vessel (1) is provided with a discharge port (16), and the upper end of the concentration vessel (1) is provided with a preheating channel (2). The preheating channel (2) is used to preheat the material before it enters the concentration vessel (1) using the secondary steam generated by the concentration vessel (1). The preheating channel (2) includes a steam channel (21) and a material channel (22) that are in close contact with each other. The inlet of the steam channel (21) is connected to the steam chamber of the concentration vessel (1), and the outlet of the material channel (22) is connected to the feed port of the concentration vessel (1).

2. The concentration equipment for nicotinamide production according to claim 1, characterized in that, Both the steam channel (21) and the material channel (22) are spiral winding channels, and the steam channel (21) is located below the material channel (22).

3. The concentration equipment for nicotinamide production according to claim 1, characterized in that, The lower end of the steam channel (21) is provided with a steam inlet (211) that communicates with the top of the concentration vessel (1), the top end of the steam channel (21) is provided with a one-way valve (213), and the lower end of the steam channel (21) is provided with a condensate drain outlet (212).

4. The concentration equipment for nicotinamide production according to claim 3, characterized in that, The concentration vessel (1) is fitted with an insulated water tank (15) on its outside, and the condensate drain outlet (212) is connected to the inside of the insulated water tank (15).

5. The concentration equipment for nicotinamide production according to claim 1, characterized in that, The material channel (22) has a material inlet (221) at the top and a discharge pipe (222) leading to the inside of the concentration vessel (1) at the bottom. A control valve (223) is provided on the discharge pipe (222).

6. The concentration equipment for nicotinamide production according to claim 1, characterized in that, The concentration vessel (1) is equipped with a stirring motor (11) at the top, and its output end is connected to a stirring shaft (12) that extends into the vessel. The inner wall of the concentration vessel (1) is equipped with an electric heating tube (13). The top of the concentration vessel (1) is also equipped with a pressure valve (14) for controlling the pressure inside the concentration vessel (1).

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