Device for gas drying and cooling

Abstract

The application discloses a device for gas drying and cooling, comprising a processing box and a refrigeration sheet. The inside of the processing box is provided with a channel for gas flow, and the refrigeration end of the refrigeration sheet is fixedly attached to the processing box and covers the channel. The gas exchanges heat with the refrigeration sheet when flowing through the channel, so as to achieve the purpose of drying and cooling. The gas inlet end of the channel is provided with a first gas channel vertically downward, and the gas outlet end is provided with a second gas channel vertically upward. The bottom of the first gas channel and the second gas channel is communicated through a transverse liquid collecting cavity. A plurality of flow resistance plates are arranged in the first gas channel in an up-down interval. The pressure in the flow resistance plate cavity will increase accordingly. Due to the compressed gas, the temperature of the gas in the cavity increases, the temperature difference between the gas and the refrigeration end is increased, and the cooling efficiency is improved. Then, the gas enters the heat exchange column rotating in the second gas channel to perform shunt heat exchange. In the process of reciprocating pressure increase and decrease, temperature increase and decrease, the internal water molecules are condensed to form water droplets and flow to the liquid collecting cavity, so as to achieve the effect of drying and cooling.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas drying, in particular to a device for gas drying and cooling. BACKGROUND

[0002] In some equipment, it is necessary to use gas to blow off and clean the pipeline, or to detect and analyze the gas in gas detection. However, the measured gas is often accompanied by high temperature and humidity, and the presence of water vapor in the gas not only interferes with the measurement and affects the accuracy of the detection result, but also pollutes and damages the detection chamber, shortening the service life of the instrument. High temperature also affects the accuracy of the detection result and accelerates the aging of the instrument and equipment.

[0003] There are many methods for drying gas at present, mainly including cooling drying, adsorbent drying, membrane drying, etc.

[0004] The cooling drying method uses refrigeration equipment to cool the gas to a certain dew point to precipitate the supersaturated water, thereby achieving the purpose of drying the gas. This method has a wide range of applications, but because it completely relies on cooling the gas, the water removal efficiency is poor, the work efficiency is low, and resources are wasted. The processed gas is not suitable for use with precision analytical instruments due to the low temperature.

[0005] The adsorption method uses active alumina, molecular sieve, and color-changing silica gel to adsorb water in the air, thereby achieving the purpose of drying the gas. However, the adsorption method is restricted by the adsorption capacity of the drying agent and the properties of the adsorbent, and the frequency of replacing the adsorbent is high, which is not suitable for continuous drying of multiple samples. At the same time, when dealing with high-temperature gas, the drying agent quickly fails.

[0006] The membrane drying method uses the permeability of water and the humidity difference on both sides of the membrane to realize the diffusion and rapid absorption of water, and finally realizes the drying of the gas on the inside of the membrane. The drying efficiency of this method depends largely on the water concentration difference on both sides of the membrane. When the water content in the sample is higher or the sample gas flow is larger, the requirement for the gas outside the membrane is higher, which easily leads to poor water removal efficiency and incomplete water removal, so it is not suitable for drying high-water-content sample gas. And when facing high-temperature gas, the membrane is easily damaged, leading to failure. SUMMARY

[0007] The technical problem to be solved by the present application is to provide a device for gas drying and cooling, which can effectively remove water from the gas.

[0008] To solve the above technical problems, the technical solution adopted by the present application is:

[0009] The device for gas drying and cooling comprises:

[0010] The processing box has a channel for gas flow inside, a first gas passage vertically downward at the gas inlet end of the channel, a second gas passage vertically upward at the gas outlet end, and the bottoms of the first gas passage and the second gas passage are communicated through a liquid collecting cavity

[0011] A plurality of flow resistance plates are arranged in the first gas passage at intervals vertically, and a gas passing gap is formed between the flow resistance plates and the inner wall of the first gas passage, and two adjacent gas passing gaps are arranged alternately.

[0012] The bottom of the second gas passage has a rotatable flow around column, a plurality of vertical through holes are formed in the flow around column, and the distances from the plurality of through holes to the center of the flow around column are different.

[0013] The bottom of the liquid collecting cavity has a drainage port with a drainage valve.

[0014] The refrigeration sheet is fixedly attached to the processing box at the refrigeration end and covers the channel.

[0015] Further technical solutions are that the caliber of the second gas passage gradually decreases upward.

[0016] Further technical solutions are that the flow resistance plates are arranged downwardly inclined.

[0017] Further technical solutions are that the inner wall of the channel is frosted.

[0018] Further technical solutions are that the bottom of the flow around column is fixed with a rotating shaft, the rotating shaft is rotatably connected with the channel, a impeller is fixed on the rotating shaft, and the impeller is located at the inlet of the second gas passage.

[0019] Further technical solutions are that the processing box has a vibrating member, and the bottom of the processing box has a buffer base.

[0020] Further technical solutions are that the bottom of the liquid collecting cavity is conical.

[0021] Further technical solutions are that the channel further includes a horizontal inlet gas section at the upper end of the first gas passage.

[0022] Further technical solutions are that the inlet gas section is also provided with flow resistance plates.

[0023] Further technical solutions are that the refrigeration sheet has two sheets, which are arranged on both sides of the processing box.

[0024] The above technical solutions have the following beneficial effects:

[0025] High temperature, humid gas access to the device inlet, in the first airway is provided with a plurality of baffle, gas in the flow passage during transmission, through the flow resistance baffle cavity pressure will be followed by the increase, due to the compression gas caused by the increase of the gas temperature in the cavity, enhance the temperature difference between the gas and the refrigeration end, improve the cooling efficiency, gas in the process of reciprocating pressure, pressure, temperature, temperature, the internal water molecules condensation to form water droplets, flow to the liquid collection cavity is collected, liquid collection cavity can be through the drain valve, discharge of the condensate water. In this process, by increasing the gas temperature, the temperature difference between the gas and the refrigeration end is increased, which can improve the cooling temperature of the refrigeration sheet and avoid damage to the precision analytical instrument due to the low temperature of the treated gas.

[0026] When the gas enters the second airway, the gas is divided due to the setting of the flow around column, and the gas changes the original flow direction with the rotation of the flow around column, has the potential energy of rotation, rotates upward, and the distance between the plurality of through holes and the center of the flow around column is different, so that the rotating gas flow is layered upward. The gas entering the flow around column is divided, the flow rate increases, the pressure increases, and the temperature rises, which can exchange heat with the rotating block. The flow rate of the gas jet from the flow around column is reduced, and due to the difference in density between the gas, liquid and solid, the liquid and particulate matter can sink under the action of gravity, further separating the gas and liquid; and the rotating upward of the gas flow prolongs the flow process of the gas flow in the airway and increases the heat exchange time with the refrigeration sheet; in addition, due to the different distances between the plurality of through holes and the center of the flow around column, the multiple layers of rotating jet gas do not overlap, which can make each layer of gas flow exchange heat sufficiently and dry the gas sufficiently.

[0027] Therefore, the device can quickly cool, dehumidify and dry the high temperature, humid gas entering the device, and provide low temperature, dry carrier gas or clean gas for the equipment; or provide stable low temperature, dry measured gas for the gas detection instrument. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Figure 1 is a structural schematic diagram of the application. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0031] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced without the specific details, other than those described herein, and it is also contemplated that the present application can be practiced with different systems, materials, and methods than those described herein. Therefore, the scope of the present application is indicated by the appended claims rather than by the description preceding them.

[0032] As shown in the drawings, the device for gas drying and cooling of the present disclosure can quickly cool and dry the high-temperature and humid gas entering, provide low-temperature and dry carrier gas or clean gas for the equipment, and ensure the safe operation of the equipment; or provide stable low-temperature and dry measured gas for the gas detection instrument, and improve the detection accuracy and service life of the detection equipment. Figure 1

[0033] The device for gas drying and cooling of the present disclosure comprises a processing box 10 and a refrigeration sheet 20. The processing box 10 has a channel for gas circulation inside, and the refrigeration end of the refrigeration sheet 20 is fixedly attached to the processing box 10 and covers the channel. The gas exchanges heat with the refrigeration sheet 20 when flowing through the channel, achieving the purpose of cooling and drying. The channel can be directly machined on the processing box 10, or the channel is made of pipe material and then fixed on the processing box 10. Preferably, the processing box 10 and the channel are both made of metal material to ensure efficient heat exchange. The refrigeration sheet 20 can be one piece or two pieces placed on both sides of the processing box 10 to improve the uniformity of heat exchange.

[0034] The inlet end of the channel has a first gas duct 101 vertically downward, and the outlet end has a second gas duct 102 vertically upward. The bottom of the first gas duct 101 and the second gas duct 102 are connected by a horizontal liquid collecting cavity 103, so that the overall structure of the channel is in the shape of a U. A plurality of flow resistance plates 104 are arranged in the first gas duct 101 at intervals vertically. The flow resistance plates 104 and the inner wall of the first gas duct 101 form a gas passing gap. The two gas passing gaps adjacent to each other are arranged alternately, so that the gas forms a polyline trajectory. The bottom of the second gas duct 102 has a rotatable flow-around column 105. The flow-around column 105 requires good heat conduction performance and can be made of aluminum block or other materials. A plurality of vertical through holes are formed on the flow-around column 105, and the distances from the plurality of through holes to the center of the flow-around column 105 are different. The bottom of the liquid collecting cavity 103 has a drainage port with a drainage valve, and preferably the bottom of the liquid collecting cavity 103 is conical, facilitating the complete drainage of the condensed liquid in the liquid collecting cavity 103.

[0035] ​In the device for gas drying and cooling of the present disclosure, the bottom of the flow-around column 105 is fixed with a rotating shaft, the rotating shaft is rotatably connected with the passage through a bearing, and an impeller 106 is fixed on the rotating shaft, the impeller 106 is located at the inlet of the second air passage 102, and the gas entering the second air passage 102 from the liquid collecting cavity 103 blows the impeller 106 to rotate, thereby rotating the flow-around column 105. In this structure, the gas drives the impeller 106 to rotate by doing work on the impeller 106, the gas is compressed, the temperature difference between the gas and the refrigeration end is further increased, and the cooling efficiency is improved. In addition, the driving part of the rotation of the flow-around column 105 can also be directly driven to rotate by a motor.

[0036] The high-temperature and humid gas is connected to the gas inlet of the device, a plurality of flow resistance plates 104 are arranged in the first air passage 101, and the pressure in the cavity of the flow resistance plate 104 increases during the transmission of the gas in the flow passage. Due to the compressed gas, the temperature of the gas in the cavity increases, the temperature difference between the gas and the refrigeration end is increased, and the cooling efficiency is improved. In the process of reciprocating pressure increase and decrease, temperature increase and decrease, the internal water molecules are condensed to form water droplets, which flow downward to the liquid collecting cavity 103 to be collected. The liquid collecting cavity 103 can discharge the condensed water in the interior through a drain valve. In this process, the temperature of the gas is increased by pressurization, the temperature difference between the gas and the refrigeration end is increased, the cooling temperature of the refrigeration sheet 20 can be increased, and damage to the precision analytical instrument caused by the gas with too low temperature after treatment can be avoided.

[0037] When the gas enters the second air passage 102, the gas is divided due to the arrangement of the flow-around column 105, the original flow direction of the gas is changed with the rotation of the flow-around column 105, the gas has potential energy of rotation, rotates upward, and the distances of the plurality of through holes from the center of the flow-around column 105 are different, so that the rotating gas flow is layered upward. The gas entering the flow-around column 105 is divided, the flow rate and the pressure are increased, the temperature is increased, and sufficient heat exchange can be performed between the gas and the flow-around column 105. The flow rate of the gas jet from the rotating block is reduced, and due to the difference in density between the gas, liquid and solid, the liquid and particulate matter can sink under the action of gravity, and further gas-liquid separation is performed. Moreover, the upward rotation of the gas flow prolongs the flow process of the gas flow in the air passage and increases the heat exchange time with the refrigeration sheet 20. In addition, due to the different distances of the plurality of through holes from the center of the flow-around column 105, the multiple layers of rotating gas jets do not overlap, so that each layer of gas flow can perform sufficient heat exchange, the gas can be fully heat exchanged and dried, and the water in the gas can be effectively removed.

[0038] In the device for gas drying and cooling of the present disclosure, the caliber of the second air passage 102 gradually decreases upward. The gas that has been cooled and dehumidified enters the converging pipe through the plurality of small openings on the flow-around column 105, the gas is slowly contracted through a long distance, the gas is subjected to secondary cooling and dehumidification, and constant-temperature dry gas is ensured to be discharged.

[0039] The baffle 104 is arranged downwardly inclined, facilitating the falling of the condensed water, and the inner wall of the channel is preferably provided with a frosted surface, which increases the contact area of the gas with the inner wall after collision, and improves the heat exchange area.

[0040] In order to make the condensed liquid attached to the baffle 104 and the inner wall of the channel fall into the liquid collecting cavity 103, the processing box 10 is provided with a vibrating member 30 such as a vibrating motor, and the bottom of the processing box 10 is provided with a buffer base 301, the bottom plate of the buffer base 301 is connected to the bottom of the processing box 10 by a plurality of springs. The condensed liquid is quickly separated from the inner wall of the channel by the vibration of the vibrating member 30, which improves the contact of the gas molecules with the inner wall of the channel and improves the heat exchange efficiency.

[0041] In addition, the channel further comprises a horizontal inlet air section 107 located at the upper end of the first air duct 101, and the inlet air section 107 is also provided with a baffle 104. The purpose of arranging the horizontal inlet air section 107 is to consider that the inlet air pressure is too large, in order to avoid that the air flow is directly blown off to the liquid collecting cavity, the inlet air pipeline is arranged in a right angle shape, which has a buffering and stabilizing effect on the air flow.

[0042] The above is only the preferred embodiment of the present application, and any simple modification, deformation and equivalent replacement of the present application according to the content of the present application falls within the protection scope of the present application.

Claims

1. A device for drying and cooling of gas, characterized in that The utility model relates to a processing box (10) which has a channel for gas flow inside, a first gas passage (101) vertically downward at the gas inlet end of the channel, a second gas passage (102) vertically upward at the gas outlet end, the bottom of the first gas passage (101) and the second gas passage (102) being connected by a liquid collecting cavity (103), wherein The processing box (10) is provided with a vibrating member (30) and a buffer base (301) at the bottom of the processing box (10); A plurality of baffle plates (104) are arranged in the first gas passage (101) at intervals vertically, and the baffle plates (104) and the inner wall of the first gas passage (101) form air passing gaps, and two adjacent air passing gaps are arranged alternately; The second gas passage (102) is provided with a rotatable flow-around column (105) at the bottom, the flow-around column (105) has good heat conduction performance, a plurality of vertical through holes are formed in the flow-around column (105), and the distances from the through holes to the center of the flow-around column (105) are different; The bottom of the liquid collecting cavity (103) is provided with a drain port with a drain valve; and A refrigeration sheet (20) is fixed to the processing box (10) at the refrigeration end and covers the channel. The caliber of the second gas passage (102) gradually decreases upward.

2. The apparatus of claim 1, wherein, The baffle plates (104) are arranged downwardly inclined.

3. The apparatus of claim 1, wherein, The inner wall of the channel is frosted.

4. The apparatus of claim 1, wherein, The bottom of the flow-around column (105) is fixed with a rotating shaft, the rotating shaft is rotatably connected with the channel, a impeller (106) is fixed on the rotating shaft, and the impeller (106) is located at the inlet of the second gas passage (102).

5. The apparatus of claim 1, wherein, The bottom of the liquid collecting cavity (103) is conical.

6. The apparatus of claim 1, wherein, The channel further comprises a horizontal inlet gas section (107) at the upper end of the first gas passage (101).

7. The apparatus of claim 1, wherein, The inlet gas section (107) is also provided with baffle plates (104).

8. The apparatus of claim 7, wherein, The refrigeration sheet (20) has two pieces which are arranged on both sides of the processing box (10).

9. The apparatus of claim 1, wherein, ​

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