CN102818879B - Saturation device for humidity generator and method thereof - Google Patents

Abstract

The invention provides a saturation device for a humidity generator, comprising: a metal cylinder body, including an air inlet arranged at the bottom of the metal cylinder body, an air outlet and a water injection port arranged at the upper part of the metal cylinder body; A close-porous plate with a plurality of small holes is located in the metal cylinder body and is arranged at a position higher than the air inlet at the lower part of the metal cylinder body; and a gas-liquid separator is located in the metal cylinder body And it is arranged on the upper part of the metal cylinder body, wherein the distance between the densely porous plate and the bottom of the metal cylinder body is set within the range of 1/4 to 1/2 of the length of the metal cylinder body, and the The amount of water injected is set such that the water surface in the metal cylindrical body is located at a predetermined position above the densely porous plate after the water injection is completed. By using the saturation device, the saturation efficiency can be improved while maintaining low cost.

Description

Saturation device and method for humidity generator

technical field

The present invention relates to the field of humidity generators, more specifically, to a saturation device and method applied to humidity generators, the saturation device and method are used to generate humid air containing saturated water vapor.

Background technique

In recent years, humidity measurement has been widely used in the environmental field. In addition, various fields such as chemical industry, electronics, food, medicine, wood, construction, aviation, etc. are also inseparable from humidity measurement and control. In technical processes in these fields, the water content is usually a very important technical parameter. Accurate measurement of water content is related to the quality and output of industrial products, and is also of great significance to safe production and energy saving.

The methods and devices for preparing gas with known humidity are divided into physical methods and chemical methods according to the principles, and physical methods are the most widely used. Physical methods usually include gravimetric method, split flow method, double pressure method, osmotic method, saturated salt method, etc. In the humidifier of the above method, the saturation device for generating saturated water vapor is the most important link, and its design and process will directly affect the application of the overall humidity generator. According to the working principle, characteristics and applicable humidity range of the humidity generator, the saturation device can be designed in various forms, such as bubble type, spray type, tray type, tube type, centrifugal type and "labyrinth" type.

The existing saturation device usually consists of a closed metal cylinder 10, as shown in Figure 1, an air inlet 11 is arranged under the metal cylinder 10 for inputting the gas to be saturated, and in the metal cylinder 10 A gas outlet 12 is arranged on the top for outputting saturated gas, and an appropriate amount of water is poured into the metal cylinder. During operation, the gas to be saturated enters the metal cylinder from the air inlet located below the metal cylinder, and then is humidified by the water poured into the metal cylinder to obtain humidified gas. However, the saturation efficiency of such a saturation device is very low. In order to achieve a relatively high degree of saturation, usually multiple groups of such saturation devices are required to be connected in series, thereby increasing the cost of the saturation device.

Therefore, there is a need for a saturation device and method for a humidity generator that can improve saturation efficiency while being low in cost.

Contents of the invention

In view of the above problems, a new saturation device and method for a humidity generator is proposed, which can improve saturation efficiency while maintaining low cost.

According to one aspect of the present invention, a saturation device for a humidity generator is provided, comprising: a metal cylinder body, including an air inlet arranged at the bottom of the metal cylinder body and an outlet arranged at the upper part of the metal cylinder body A gas port and a water injection port, the gas inlet is used to input the gas to be saturated, and the gas outlet is used to output the saturated gas; a dense-porous plate with a plurality of small holes is located in the metal cylinder body and arranged in the The lower part of the metal cylinder body is higher than the air inlet, which is used to saturate the humidified gas passing through the dense hole plate; and the gas-liquid separator is located in the metal cylinder body and set The upper part of the metal cylinder is used for gas-liquid separation of the saturated gas after saturation treatment, so as to output the saturated gas obtained after gas-liquid separation through the gas outlet, wherein the dense-porous plate The distance from the bottom of the metal cylinder body is set to be in the range of 1/4 to 1/2 of the length of the metal cylinder body, and the amount of water injected is set so that after the water injection is completed, the The water surface in the metal cylinder body is located at a predetermined position above the densely porous plate.

In one or more examples of the above aspect, the diameter of the densely porous plate is the same as that of the metal cylinder body, and the hole density of the densely porous plate is set to 11/cm ² .

In one or more examples of the above aspects, the pore diameter of the densely porous plate is set to 1.6mm.

In one or more examples of the above aspects, the metal cylinder includes an upper cylinder and a lower cylinder, the diameter of the upper cylinder is smaller than the diameter of the lower cylinder, and the air inlet is arranged at the The bottom of the lower cylinder, the air outlet is arranged on the side of the upper cylinder, and the water injection port is arranged on the top of the upper cylinder.

In one or more examples of the above aspects, the saturation device may further include: a heat exchange tube, connected to the air inlet on the metal cylinder body, for The gas to be saturated in the body is subjected to heat exchange treatment; and a constant temperature water tank, wherein, the metal cylindrical body and the heat exchange tube are immersed in the constant temperature water tank, so that the temperature of the gas entering the metal cylindrical body is the same as The temperature in the thermostatic bath is consistent.

In one or more examples of the above aspect, the heat exchange tube is spiral.

In one or more examples of the above aspect, multiple saturation devices are cascaded, and the gas outlet of each upstream saturation device is connected to the inlet of a downstream saturation device through a connecting pipe.

In one or more examples of the above aspect, the predetermined position is located 5 to 20 mm above the densely porous plate.

In one or more examples of the above aspects, the water is deionized water.

According to another aspect of the present invention, there is provided a method for obtaining saturated gas in a humidity generator using a saturation device, the saturation device comprising a metal cylindrical body having an air inlet, an air outlet and a water injection port, The densely porous plate located in the metal cylinder and arranged on the lower part of the metal cylinder and the gas-liquid separator located in the metal cylinder and arranged on the upper part of the metal cylinder, the densely porous plate and the The distance from the bottom of the metal cylinder is set to be in the range of 1/4 to 1/2 of the length of the metal cylinder, and the method includes: injecting water into the metal cylinder through the water injection port Water is injected into the body so that the water surface in the metal cylinder body is located at a predetermined distance above the dense hole plate; the gas to be saturated is input into the metal cylinder body through the air inlet and passes through the dense hole The water under the plate is humidified and reaches the dense-porous plate; the gas is saturated by bubbling through the dense pores on the dense-porous plate; the gas after bubbling and saturation passes through the gas-liquid separator for gas-liquid separation, The air outlet is output to the outside.

According to the saturation device of the humidity generator of the present invention, a densely porous plate with a plurality of small holes is arranged in the metal cylinder body of the saturation device, and the position of the densely porous plate in the metal cylinder body and the amount of injected water are set , can improve the saturation efficiency of the saturation device, and at the same time make the structure of the saturation device simple, easy to realize and low in production cost.

To the accomplishment of the above and related ends, one or more aspects of the invention comprise the features hereinafter described in detail and particularly pointed out in the claims. The following description and accompanying drawings detail certain exemplary aspects of the invention. These aspects are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Furthermore, the invention is intended to include all such aspects and their equivalents.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description made with reference to the accompanying drawings. In the attached picture:

Figure 1 shows a schematic diagram of an example of a saturation device in the prior art;

Fig. 2 shows a schematic diagram of an example of the structure of a saturation device according to an embodiment of the present invention;

Fig. 3 shows the schematic diagram of the densely porous plate structure in Fig. 2;

Fig. 4 shows the relational graph of hole density and degree of saturation according to the present invention;

Fig. 5 shows the relation curve of pore size and degree of saturation according to the present invention;

Fig. 6 shows a schematic diagram of an example of the structure of a saturation device according to another embodiment of the present invention;

Figure 7 shows a schematic diagram of a structure in which a plurality of saturation devices according to the present invention are cascaded together; and

Fig. 8 shows a flowchart of a method for obtaining saturated gas according to the present invention.

The same reference numerals indicate similar or corresponding features or functions throughout the drawings.

Detailed ways

Various aspects of the disclosure are described below. It should be appreciated that the teachings herein may be embodied in a wide variety of forms and that any specific structure, function, or both disclosed herein are merely representative. Based on the teachings herein one skilled in the art should appreciate that an aspect disclosed herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented or a method practiced using any number of the aspects set forth herein. In addition, such an apparatus may be implemented or such a method may be practiced with other structure, functionality, or structure and functionality in addition to or in addition to one or more of the aspects set forth herein. Additionally, any aspect described herein may comprise at least one element of a claim.

Various embodiments of the present invention will be described below with reference to the accompanying drawings.

Fig. 2 shows a schematic diagram of an example of the structure of a saturation device 200 according to an embodiment of the present invention.

As shown in FIG. 2 , the saturation device 200 includes a metal cylinder, which is used for saturating the gas to be saturated passing therethrough after injecting water therein. In the example shown in FIG. 2 , the metal cylinder includes an upper cylinder 211 and a lower cylinder 212 . The diameter of the upper cylinder 211 is smaller than that of the lower cylinder 212 . In another example of the present invention, the metal cylindrical barrel may be only one barrel.

An air inlet 22 is provided at the bottom of the lower cylinder body 212 of the metal cylinder body for inputting gas to be saturated into the metal cylinder body from the outside. A gas outlet 23 is provided on the side of the upper body 211 of the metal cylinder for outputting saturated gas to the outside or downstream saturation device. In addition, a water injection port is provided on the top of the upper cylinder 211 of the metal cylinder for injecting water into the metal cylinder during operation. In one example, the water is deionized water. The amount of water injected is set such that the water surface in the metal cylindrical body is located at a predetermined position above the densely porous plate after the water injection is completed. In a preferred embodiment, the predetermined position is 5 to 20 mm above the densely porous plate.

A densely porous plate 25 with a plurality of small holes is also arranged in the lower cylinder 212 of the metal cylinder, and the densely porous plate 25 is located at the lower portion of the lower cylinder 212 of the metal cylinder than the inlet. The position of the gas port 22 is used to saturate the humidified gas passing through the dense-porous plate. The distance between the densely porous plate 25 and the bottom of the metal cylinder is set within a range of 1/4 to 1/2 of the length of the lower body 212 of the metal cylinder. Preferably, the distance between the densely porous plate 25 and the bottom of the metal cylinder is set to 1/3 of the length of the lower body 212 of the metal cylinder. In the case that the metal cylindrical body has only one body, the distance between the densely porous plate 25 and the bottom of the metal cylindrical body is set at 1 of the length of the metal cylindrical body. /4 to 1/2 range. Preferably, the distance between the densely porous plate 25 and the bottom of the metal cylinder is set to 1/3 of the length of the metal cylinder. In an example of the present invention, the diameter of the densely porous plate is the same as that of the metal cylinder.

FIG. 3 shows a schematic diagram of the dense-porous plate structure in FIG. 2 . In the structure shown in FIG. 3, the pores on the dense-porous plate are preferably uniformly distributed. In another example of the present invention, the small holes on the densely porous plate may not be evenly distributed. The hole density of the dense hole plate directly affects the size of the saturation, the saturation is reduced when the hole density is low, and the processing cost is increased when the hole density is high. In this paper, the hole density of a dense-porous plate is defined as the number of holes per unit area, that is, the number of holes/cm ² . Table 1 below shows the experimental results of the relationship between pore density and saturation.

Pore density (pore/cm ² ) saturation 5 90 7 95 9 98 11 99 13 99

Table 1 Relationship between pore density and saturation

Figure 4 shows a graph of pore density versus saturation. It can be seen from the chart that when the hole density is 11-13 (holes/cm ² ), the saturation reaches 99%, and the hole density of 13 increases the processing difficulty and cost. Therefore, considering the saturation efficiency and cost, the pore density is preferably 11 pores/cm ² .

In addition, the pore size selection of the small holes on the densely porous plate will also affect the saturation efficiency of the saturation device 200 . The diameter of the small holes of the densely porous plate according to the present invention ranges from 0.5 to 2 (mm). Generally, if the pore size is less than 0.5mm, it is easy to block, and if it is greater than 2mm, the contact surface between the airflow and water will be reduced, and the saturation will be reduced. Preferably, the pore diameter of the dense-porous plate is set to 1.6 mm.

Table 2 below shows the relationship between pore size and saturation on dense porous plates.

Aperture (mm) saturation(%) 0.5 95 1 100 1.3 100 1.6 100 1.9 99 2.2 98 2.5 95

Table 2 Relationship between pore size and saturation

Based on the above Table 2, the graph of the relationship between the pore size and saturation shown in FIG. 5 was obtained.

In addition, a gas-liquid separator 26 is arranged in the lower cylinder body 212 of the metal cylinder body, and the gas-liquid separator 26 is located on the upper part of the lower cylinder body 212 of the metal cylinder body, and is used for saturating the saturated gas after saturation treatment. The gas undergoes gas-liquid separation, so as to output the saturated gas obtained after the gas-liquid separation through the gas outlet. In the case where the metal cylindrical body consists of only one body, the gas-liquid separator 26 is provided on the upper portion of the metal cylindrical body 21 .

Specifically, the molecules of the saturated gas collide with each other during the rising process to form water droplets and fall freely. Then, the liquid and gas are separated in the gas-liquid separator, so that the humidified saturated moisture is output from the gas outlet, while The liquid enters the lower barrel 212 . Here, the gas-liquid separator 26 can be made of 20-70 mesh stainless steel mesh.

The saturation device according to one embodiment of the present invention has been shown above. Using this saturation device, a densely porous plate with a plurality of small holes is arranged in the metal cylinder body of the saturated device, and the densely porous plate is arranged on the metal cylinder. The position in the cylinder body and the amount of water injected can improve the saturation efficiency of the saturation device, and at the same time make the structure of the saturation device simple, easy to implement and low in manufacturing cost.

Fig. 6 shows a schematic diagram of a saturation device 600 according to another embodiment of the present invention.

Compared with the saturation device 200 shown in FIG. 2 , the difference of the saturation device 600 in FIG. 6 is that the saturation device 600 also includes a heat exchange tube 610 connected to the air inlet on the metal cylinder , for performing heat exchange treatment on the gas to be saturated to be input into the metal cylinder body; and a constant temperature water tank 620, wherein the metal cylinder body and heat exchange tubes are immersed in the constant temperature water tank, thereby Make the temperature of the gas entering the metal cylinder consistent with the temperature in the constant temperature water tank. Here, the heat exchange tubes are spiral. In another example of the invention, other suitable shapes may also be used.

Fig. 7 shows a schematic diagram of a structure in which a plurality of saturation devices according to the present invention are cascaded together. As shown in FIG. 7 , a plurality of saturation devices 200 are cascaded, wherein the gas outlet of each upstream saturation device is connected to the inlet of a downstream saturation device through a connecting pipe.

Furthermore, in a modification of the structure shown in FIG. 7 , before the first saturation device 200 , a heat exchanger 610 may also be provided, and the heat exchanger 610 and the plurality of saturation devices 200 are immersed in a constant temperature bath 620 .

FIG. 8 shows a flow chart of a method for obtaining saturated gas according to the present invention, which is implemented by the saturation device 200 or 600 according to the present invention.

As shown in Figure 8, during operation, first, in step S810, water is injected into the metal cylinder body through the water injection port, so that the water surface in the metal cylinder body is located above the dense-porous plate for a predetermined period. distance. After the water injection is completed, in step S820, the gas to be saturated is input into the metal cylindrical body through the gas inlet, and is humidified by the water below the dense-pore plate before reaching the dense-pore plate. Next, in step S830, the gas is saturated by bubbling through the dense pores on the densely porous plate. Then, in step S840, the gas saturated with bubbling passes through the gas-liquid separator for gas-liquid separation, and then is output to the outside through the gas outlet.

Embodiments of the saturation device and method of the humidity generator according to the present invention are described above with reference to FIGS. 2 to 8 . It is to be understood however that the functions, steps and/or actions of the method claims in accordance with the embodiments described herein need not be performed in any particular order. Furthermore, although elements of the invention may be described or claimed in individual form, a plurality is also contemplated unless expressly limited to the singular.

Although the various embodiments of the present invention have been described above with reference to the drawings, those skilled in the art should understand that various embodiments can be made without departing from the content of the present invention for the various embodiments of the present invention. kind of improvement. Therefore, the protection scope of the present invention should be determined by the contents of the appended claims.

Claims (9)

1. A saturation device for a humidity generator, comprising: The metal cylinder body includes an air inlet arranged at the bottom of the metal cylinder body, an air outlet and a water injection port arranged at the upper part of the metal cylinder body, the air inlet is used to input the gas to be saturated, and the The gas outlet is used to output saturated gas; A dense-porous plate with a plurality of small holes is located in the metal cylinder body and is arranged at a position higher than the air inlet at the lower part of the metal cylinder body, and is used to humidify the air passing through the dense-pore plate. The gas is saturated; and A gas-liquid separator, located in the metal cylinder body and arranged on the upper part of the metal cylinder body, is used for gas-liquid separation of the saturated gas after saturation treatment, so as to output through the gas outlet Saturated gas obtained after gas-liquid separation, Wherein, the distance between the densely porous plate and the bottom of the metal cylinder is set to be in the range of 1/4 to 1/2 of the length of the metal cylinder, and the amount of water injected is set In order to make the water surface in the metal cylinder body be located at a predetermined position above the densely porous plate after the water injection is completed, the predetermined position is located 5 to 20 mm above the densely porous plate; The diameter of the densely porous plate is the same as the diameter of the metal cylinder, the hole density of the densely porous plate is set to 11-13 holes/cm ² , and the hole diameter of the densely porous plate is set to 1-1.6mm ;as well as The gas-liquid separator is a 20-70 mesh stainless steel mesh. 2. The saturation device according to claim 1, wherein the density of the pores of the densely porous plate is set at 11 pores/cm ² . 3. The saturation device according to claim 1, wherein the pore diameter of the densely porous plate is set to 1.6mm. 4. The saturation device according to claim 1, wherein the metal cylinder comprises an upper cylinder and a lower cylinder, the diameter of the upper cylinder is smaller than the diameter of the lower cylinder, The air inlet is arranged at the bottom of the lower cylinder, the air outlet is arranged at the side of the upper cylinder, and the water injection port is arranged at the top of the upper cylinder, and The distance between the densely porous plate and the bottom of the metal cylinder is set within a range of 1/4 to 1/2 of the length of the lower body of the metal cylinder. 5. The saturation device of claim 1, further comprising: a heat exchange tube, connected to the air inlet on the metal cylinder body, for performing heat exchange treatment on the gas to be saturated to be input into the metal cylinder body; and constant temperature sink, Wherein, the metal cylindrical body and the heat exchange tube are submerged in the constant temperature water tank, so that the temperature of the gas entering the metal cylindrical body is consistent with the temperature in the constant temperature water tank. 6. The saturation device according to claim 5, wherein the heat exchange tube is spiral. 7. The saturation device according to claim 1, wherein a plurality of said saturation devices are cascaded, and the gas outlet of each upstream saturation device is connected to the gas inlet of a downstream saturation device through a connecting pipe. 8. The saturator of claim 1, wherein the water is deionized water. 9. A method utilizing the saturation device according to claim 1 to obtain the saturated gas in the humidity generator, said method comprising: Injecting water into the metal cylinder body through the water injection port, so that the water surface in the metal cylinder body is located at a predetermined position above the densely porous plate; The gas to be saturated is input into the metal cylinder body through the air inlet and reaches the dense-porous plate after being humidified by the water under the dense-porous plate; Saturation of the gas by bubbling through dense pores on a densely porous plate; The gas saturated with bubbling passes through the gas-liquid separator for gas-liquid separation, and then is output to the outside through the gas outlet.