Neutralization and crystallization equipment capable of uniformly spraying at inlet nozzle

Abstract

The utility model provides neutralization crystallization equipment capable of uniformly spraying at an inlet nozzle. The neutralization crystallization equipment comprises a shell, a steam condensate outlet, a tail gas ammonia input pipe and a sulfuric acid solution input pipe, wherein the steam condensate outlet is formed in the top of the shell; the tail gas ammonia input pipe and the sulfuric acid solution input pipe are arranged at the bottom of the shell; a nozzle is arranged at the inner end of the sulfuric acid solution input pipe, and a plurality of spraying holes are formed in the side face of the nozzle. The crystallizer has the beneficial effects that the nozzles capable of uniformly spraying are arranged, so that the liquid in the crystallizer can be uniformly distributed without dead angles or excessively concentrated areas, and the crystallization process can be uniformly carried out in the whole crystallizer. Competition and interference in the crystal growth process are reduced, the crystallization efficiency is improved, and crystals with uniform sizes and regular shapes can be formed. The liquid is uniformly distributed, so that the external influence on the crystal in the growth process is more consistent, the crystal form difference caused by different local conditions is reduced, and the phenomenon of local overheating or supercooling is avoided.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a neutralization crystallization device with uniform spraying at an inlet nozzle. Background Art

[0002] With the rapid progress of the global chemical industry, technological innovation and application have become the core driving force for the continuous development of this industry. Against this backdrop, neutralization crystallization technology has played a pivotal role in the field of chemical engineering with its significant advantages such as high efficiency, environmental protection, and strong controllability. Whether in the fields of fine chemicals, pharmaceutical manufacturing, or environmental protection, neutralization crystallization technology plays a vital role, especially in those industries with extremely high requirements for product quality, it has become an indispensable link.

[0003] However, despite the many advantages of neutralization crystallization technology, traditional neutralization crystallization equipment often encounters some thorny problems during the spraying process. The spraying device is the core part of the neutralization crystallization equipment, and its performance is directly related to the efficiency and quality of the entire crystallization process. However, due to design limitations or improper operation, traditional spraying systems often cannot achieve uniform distribution of liquid.

[0004] Specifically, the liquid often becomes unevenly distributed during the spraying process. This means that in some areas, the liquid concentration is too high, causing the crystallization rate in these areas to be too fast, and the too fast crystallization rate often affects the growth quality of the crystals, resulting in reduced purity and yield of the product. At the same time, too high a concentration may also cause corrosion to the equipment and shorten the service life of the equipment. In other areas, the liquid concentration may be too low, and the crystallization rate in these areas is too slow, or even unable to form effective crystals, which not only wastes raw materials, but also reduces the efficiency of the entire crystallization process.

[0005] In addition, uneven liquid distribution may also lead to uneven temperature distribution in the crystallization reactor. In some areas, due to excessive liquid concentration, the reaction exotherm is too high, which may cause local temperature to be too high, thus causing a series of safety hazards. In other areas, due to low liquid concentration, the reaction exotherm is insufficient, which may cause local temperature to be too low, affecting the growth rate and quality of the crystal.

[0006] Therefore, the problem of uneven liquid distribution in the spraying process of traditional neutralization crystallization equipment will not only reduce the crystallization efficiency and increase energy consumption, but also have a negative impact on product quality and may even cause equipment failure and threaten production safety. Utility Model Content

[0007] Aiming at the deficiencies of the prior art, the problem of uneven spraying at the inlet nozzle of the neutralization crystallization equipment is solved.

[0008] The utility model provides a neutralization crystallization device with uniform spraying at an inlet nozzle, comprising a shell, a steam condensate outlet arranged at the top of the shell, and a tail gas ammonia input pipe and a sulfuric acid solution input pipe arranged at the bottom of the shell; a nozzle is arranged at the inner end of the sulfuric acid solution input pipe, and a plurality of spray holes are arranged on the side of the nozzle.

[0009] Furthermore, the spray holes are arranged in multiple rows, each row has 3 to 5 holes, and the spray holes in two adjacent rows are arranged crosswise.

[0010] As a preferred solution, the diameter of the spray hole is 4 to 5 mm.

[0011] Furthermore, a stirrer for stirring ammonia and sulfuric acid is arranged at the bottom of the shell.

[0012] Furthermore, a guide tube is arranged above the agitator, and a plurality of reflux holes are arranged at the bottom of the guide tube.

[0013] Furthermore, a plurality of baffles are arranged inside the shell to allow the solution attached to the side wall of the shell to flow back to the bottom of the shell.

[0014] As a preferred solution, the inner side of the sulfuric acid solution inlet pipe is tilted downward at an angle of 30 degrees.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model can ensure that the liquid in the crystallizer is evenly distributed by setting a nozzle for uniform spraying, without dead corners or overly concentrated areas, thereby ensuring that the crystallization process can be carried out evenly throughout the crystallizer. This uniform distribution makes the growth rate of the crystal more consistent, reduces competition and interference in the crystal growth process, improves the crystallization efficiency, and helps to form crystals of uniform size and regular shape. Because the liquid is evenly distributed, the external influences on the crystal during the growth process are more consistent, reducing the differences in crystal morphology caused by different local conditions, and avoiding local overheating or overcooling. For applications that require high-precision crystals, such as semiconductor materials, pharmaceuticals, etc., uniform spraying can ensure the consistency and high purity of the product while reducing secondary processing or scrap rates that may be caused by uneven crystallization, thereby reducing production costs.

[0017] 2. The design of the nozzle of the utility model enables it to be easily adjusted and controlled to adapt to different production requirements and liquid properties. The stability of uniform spraying makes the crystallization process more controllable, reduces production fluctuations caused by improper operation or equipment failure, reduces equipment wear and corrosion caused by poor local conditions, and thus extends the service life of the crystallizer and its related equipment. At the same time, it reduces the scaling and clogging of the inner wall of the crystallizer caused by uneven crystallization, and reduces the maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the sulfuric acid solution input pipe of the utility model.

[0021] Figure 3 It is a structural schematic diagram of the nozzle of the utility model.

[0022] The reference numerals in the accompanying drawings are:

[0023] 1- tail gas ammonia input pipe, 2- sulfuric acid solution input pipe, 3- nozzle, 31- spray hole, 4- agitator, 5- guide tube, 6- baffle, 7- shell, 8- steam condensate outlet. DETAILED DESCRIPTION

[0024] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0025] Example:

[0026] See also Figures 1 to 3 The embodiment of the utility model provides a neutralization crystallization device with uniform spraying at the inlet nozzle, including a shell 7, a steam condensate outlet 8 arranged at the top of the shell, and a tail gas ammonia input pipe 1 and a sulfuric acid solution input pipe 2 arranged at the bottom of the shell; to ensure the uniform spraying of the sulfuric acid solution, the embodiment provides a nozzle 3 at the inner end of the sulfuric acid solution input pipe 2, and a plurality of spray holes 31 with an aperture of 4.5 mm are provided on the side of the nozzle 3. Specifically, the spray holes 31 are provided in 4 rows, each row has 4 holes, and the spray holes 31 in two adjacent rows are cross-arranged, and the deflection angle is 45 degrees.

[0027] In order to fully mix the sulfuric acid solution and the ammonia gas, a stirrer 4 for stirring the ammonia gas and the sulfuric acid is provided at the bottom of the shell 7, and a guide tube 5 is provided above the stirrer 4, and four reflux holes are provided at the bottom of the guide tube 5. A plurality of baffles 6 are provided inside the shell 7 to make the solution attached to the side wall of the shell 7 flow back to the bottom of the shell 7, so that the reacting solution flows upward from the bottom along the guide tube 5, then flows back to the bottom from the baffle 6, and enters the guide tube 5 from the reflux hole to participate in the reaction again during stirring, so as to realize the full recycling of the materials.

[0028] In addition, in this embodiment, the sulfuric acid solution inlet pipe 2 is arranged to be tilted downward on the inside with an inclination angle of 30 degrees, so as to speed up the inlet rate of the sulfuric acid solution.

[0029] This embodiment can ensure that the liquid in the crystallizer is evenly distributed by setting a nozzle for uniform spraying, without dead corners or overly concentrated areas, thereby ensuring that the crystallization process can be carried out evenly throughout the crystallizer. This uniform distribution makes the growth rate of the crystal more consistent, reduces competition and interference during the crystal growth process, improves the crystallization efficiency, and helps to form crystals of uniform size and regular shape. Because the liquid is evenly distributed, the external influences on the crystal during the growth process are more consistent, reducing the differences in crystal morphology caused by different local conditions, and avoiding local overheating or overcooling. For applications that require high-precision crystals, such as semiconductor materials, pharmaceuticals, etc., uniform spraying can ensure the consistency and high purity of the product while reducing secondary processing or scrap rates that may be caused by uneven crystallization, thereby reducing production costs.

[0030] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are existing technologies in the field.

Claims

1. A neutralization crystallization device with uniform spraying at the inlet nozzle, comprising a shell (7), a steam condensate outlet (8) arranged at the top of the shell, and a tail gas ammonia inlet pipe (1) and a sulfuric acid solution inlet pipe (2) arranged at the bottom of the shell, characterized in that: A nozzle (3) is provided at the inner end of the sulfuric acid solution input pipe (2), and a plurality of spray holes (31) are provided on the side of the nozzle (3).

2. The neutralization crystallization device with uniform spraying at the inlet nozzle according to claim 1 is characterized in that: The spray holes (31) are arranged in a plurality of rows, each row having 3 to 5 spray holes, and the spray holes (31) in two adjacent rows are arranged crosswise.

3. The neutralization crystallization device with uniform spraying at the inlet nozzle according to claim 1 is characterized in that: The diameter of the spray hole (31) is 4 to 5 mm.

4. The neutralization crystallization device with uniform spraying at the inlet nozzle according to claim 1 is characterized in that: A stirrer (4) for stirring ammonia and sulfuric acid is arranged at the bottom of the shell (7).

5. The neutralization crystallization device with uniform spraying at the inlet nozzle according to claim 4 is characterized in that: A flow guide tube (5) is arranged above the agitator (4), and a plurality of reflux holes are arranged at the bottom of the flow guide tube (5).

6. The neutralization crystallization device with uniform spraying at the inlet nozzle according to claim 1, characterized in that: A plurality of baffles are arranged inside the shell (7) to allow the solution attached to the side wall of the shell (7) to flow back to the bottom of the shell (7).

7. The neutralization crystallization device with uniform spraying at the inlet nozzle according to claim 1, characterized in that: The inner side of the sulfuric acid solution inlet pipe (2) is tilted downward at an angle of 30 degrees.

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