Continuous purification device in electronic-grade ammonia water production line

Abstract

The utility model discloses a continuous purification device in an electronic grade ammonia water production line, which comprises an ammonia water raw material bin, the ammonia water raw material bin is communicated with a filter bin through a pipeline, a delivery pump is arranged between the ammonia water raw material bin and the filter bin, the filter bin is communicated with a liquid ammonia distiller through a pipeline, and the top of the liquid ammonia distiller is connected with a plurality of condensers. A plurality of condensers are jointly connected to a dewatering bin through pipelines, the dewatering bin is communicated with an ion exchanger through a pipeline, the ion exchanger is connected with a microporous filter for precise filtration through a pipeline, and the microporous filter is communicated with a water storage bin through a pipeline; according to the utility model, multi-layer purification steps including distillation, dehydration, ion exchange and microporous filtration are adopted, so that effective removal of various impurities is ensured, and multi-layer product purity guarantee is provided; moisture is effectively removed through a molecular sieve or a moisture absorbent in the dewatering bin, ion impurities are further removed through an ion exchanger, and it is ensured that the ammonia water meets the requirement of the electronic grade.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia water purification, in particular to a continuous purification device in an electronic grade ammonia water production line. Background Art

[0002] Ammonia water, as an aqueous solution of ammonia gas, is used in various fields such as military, agriculture, and industry. At present, domestic ammonia water preparation equipment is divided into industrial ammonia water, electronic grade ammonia water, and reagent grade ammonia water preparation equipment. The above equipment is single in use, that is, one equipment cannot be used to prepare various grades of ammonia water, and most equipment can only prepare industrial grade ammonia water.

[0003] In the electronics manufacturing industry, very high purity requirements are placed on ammonia water to prevent the introduction of any impurities that could damage electronic equipment during the manufacturing process. In the traditional ammonia water purification process, electronic-grade ammonia water has extremely strict requirements on microorganisms and tiny particles, as these contaminants may cause damage to electronic devices. In addition, during the ammonia water purification process, water will be mixed in it, thus affecting the quality of the ammonia water. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of contamination by impurities such as microorganisms and tiny particles in the traditional ammonia purification process, and the influence of mixed water on the quality of ammonia, and to provide a continuous purification device in an electronic grade ammonia production line.

[0005] The utility model achieves the above-mentioned purpose through the following technical scheme: a continuous purification device in an electronic-grade ammonia production line is provided, comprising an ammonia raw material bin, the ammonia raw material bin is connected to a filtering bin through a pipeline, a delivery pump is provided between the ammonia raw material bin and the filtering bin, the filtering bin is connected to a liquid ammonia distiller through a pipeline, a plurality of condensers are connected to the top of the liquid ammonia distiller, the plurality of condensers are connected to a dehydration bin through pipelines, the dehydration bin is connected to an ion exchanger through a pipeline, the ion exchanger is connected to a microporous filter for precision filtration through a pipeline, and the microporous filter is connected to a water storage bin through a pipeline.

[0006] Furthermore, a filter screen is provided in the filter bin, and a motor connected to the filter screen is provided on one side of the filter bin.

[0007] Furthermore, a heater is provided in the liquid ammonia distiller.

[0008] Furthermore, the top of the liquid ammonia distiller is connected to at least two of the condensers, and the condensers are condensation towers.

[0009] Furthermore, a first valve is installed between the condenser and the dehydration bin, and the dehydration bin is filled with a molecular sieve or a desiccant.

[0010] Furthermore, a second valve is installed between the dehydration bin and the ion exchanger, and the ion exchanger is an ion exchange column or an ion exchange bed filled with ion exchange resin.

[0011] Furthermore, the microporous filter is a high-efficiency microporous filter with a pore size between 0.01 microns and 0.1 microns to remove tiny particles and microorganisms.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Multi-layer purification steps are adopted, including distillation, dehydration, ion exchange and microfiltration, which ensures the effective removal of various impurities and provides multi-level product purity assurance;

[0014] 2. The filter screen in the filter bin combined with the operation of the motor helps to filter the ammonia water more effectively; the heater and condensing tower system in the liquid ammonia distiller ensures that the appropriate temperature and pressure can be maintained during the production process, which helps to improve the purity of the ammonia water;

[0015] 3. The molecular sieve or desiccant in the dehydration bin effectively removes moisture, while the ion exchanger further removes ionic impurities to ensure that the ammonia water meets the electronic grade requirements. The microporous filter can efficiently remove tiny particles and microorganisms, providing extremely high purity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the filter bin in the utility model;

[0018] In the figure: 1-ammonia raw material warehouse, 2-filtration warehouse, 3-delivery pump, 4-liquid ammonia distiller, 5-condenser, 6-dehydration warehouse, 7-ion exchanger, 8-microporous filter, 9-water storage warehouse, 10-motor, 11-first valve, 12-second valve;

[0019] 21- filter screen, 41- heater. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships 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 referred device or element 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.

[0022] Combination Figure 1 to Figure 2 A continuous purification device in an electronic grade ammonia production line shown in the figure comprises an ammonia raw material bin 1, which is connected to a filter bin 2 through a pipeline, a delivery pump 3 is arranged between the ammonia raw material bin 1 and the filter bin 2, the filter bin 2 is connected to a liquid ammonia distiller 4 through a pipeline, a plurality of condensers 5 are connected to a dehydration bin 6 through pipelines, the dehydration bin 6 is connected to an ion exchanger 7 through a pipeline, the ion exchanger 7 is connected to a microporous filter 8 for precision filtration through a pipeline, and the microporous filter 8 is connected to a water storage bin 9 through a pipeline;

[0023] Among them, a filter screen 21 is provided in the filter bin 2, and a motor 10 connected to the filter screen is provided on one side of the filter bin 2; when purifying, the delivery pump 3 delivers the primary raw ammonia water in the ammonia water raw material bin 1 to the filter bin 2 through the pipeline, and the motor 10 on one side of the filter bin 2 is started as the primary raw ammonia water enters, and the motor 10 drives the filter screen 21 to rotate in the filter bin 2, and performs a preliminary adsorption filtration on the raw ammonia water therein, and the filtered ammonia water enters the liquid ammonia distiller 4, and after being heated by the heater 41 in the liquid ammonia distiller 4, it rises along the pipeline to the condenser 5 for liquefaction, and the liquefied ammonia water flows to the dehydration bin 6 through the pipeline; a first valve is installed between the condenser 5 and the dehydration bin 6. Door 11, the dehydration bin 6 is equipped with a molecular sieve or a moisture absorber, and the first valve 11 is used to control the amount of water entering the dehydration bin 6 for more complete dehydration. The dehydrated liquid ammonia flows to the ion exchanger 7 along the pipeline. A second valve 12 is installed between the dehydration bin 6 and the ion exchanger. The ion exchanger 7 is an ion exchange column or an ion exchange bed equipped with ion exchange resin. The second valve 12 is used to control the amount of liquid ammonia entering the ion exchanger 7 for more effective deionization of impurities. Then the liquid ammonia enters the microporous filter 8 for final precision filtration. The microporous filter 8 adopts a high-efficiency microporous filter with a pore size between 0.01 microns and 0.1 microns to remove tiny particles and microorganisms.

[0024] Molecular sieve is a material that highly absorbs water. It is usually a porous crystal structure with a pore size that can selectively absorb molecules. In the preparation of ammonia water, molecular sieves can effectively absorb water and help increase the concentration of ammonia water. Molecular sieves are usually zeolites, aluminosilicates and other materials. Choosing the right molecular sieve can achieve efficient dehydration effects; desiccant is a chemical substance with strong hygroscopic ability. In the dehydration bin, the desiccant can quickly absorb the surrounding moisture and reduce the moisture in the ammonia water. Sodium hydroxide (sodium hydroxide is a strong base and also a desiccant) is one of the common desiccant, but choosing a suitable desiccant needs to take into account the requirements of the production process and the purity standard of the final product.

[0025] In an ion exchange column, ion exchange resins are usually loaded in the column. When ammonia water passes through the column, the impurity ions in it will exchange with specific ions in the resin. In this way, the impurity ions on the resin will be captured, and the ion exchange resin will release the corresponding ions into the solution; the ion exchange resin can be loaded in a large fluidized bed or fixed bed, and when ammonia water passes through the bed, ion exchange reactions occur. The design of the bed allows the ion exchange resin to remain in the bed to ensure sufficient contact and improve purification efficiency.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A continuous purification device in an electronic grade ammonia production line, comprising an ammonia raw material warehouse (1), characterized in that: The ammonia raw material bin (1) is connected to the filtering bin (2) through a pipeline, a delivery pump (3) is provided between the ammonia raw material bin (1) and the filtering bin (2), the filtering bin (2) is connected to the liquid ammonia distiller (4) through a pipeline, a plurality of condensers (5) are connected to the top of the liquid ammonia distiller (4), the plurality of condensers (5) are connected to the dehydration bin (6) through pipelines, the dehydration bin (6) is connected to the ion exchanger (7) through a pipeline, the ion exchanger (7) is connected to a microporous filter (8) for precision filtration through a pipeline, and the microporous filter (8) is connected to the water storage bin (9) through a pipeline.

2. The continuous purification device in the electronic grade ammonia production line according to claim 1, characterized in that: A filter screen (21) is provided in the filter chamber (2), and a motor (10) connected to the filter screen is provided on one side of the filter chamber (2).

3. The continuous purification device in the electronic grade ammonia production line according to claim 2, characterized in that: A heater (41) is provided in the liquid ammonia distiller (4).

4. The continuous purification device in the electronic grade ammonia production line according to claim 3, characterized in that: The top of the liquid ammonia distiller (4) is connected to at least two condensers (5), and the condensers (5) are condensation towers.

5. The continuous purification device in the electronic grade ammonia production line according to claim 4, characterized in that: A first valve (11) is installed between the condenser (5) and the dehydration bin (6), and a molecular sieve or a desiccant is installed in the dehydration bin (6).

6. The continuous purification device in the electronic grade ammonia production line according to claim 5, characterized in that: A second valve (12) is installed between the dehydration bin (6) and the ion exchanger, and the ion exchanger (7) is an ion exchange column or an ion exchange bed filled with ion exchange resin.

7. The continuous purification device in the electronic grade ammonia production line according to claim 6, characterized in that: The microporous filter (8) is a high-efficiency microporous filter with a pore size between 0.01 microns and 0.1 microns, so as to remove tiny particles and microorganisms.

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