Cold trap aging device

Abstract

A cold trap aging device comprises a gas circuit module, a heating module, a control module and an installation module. The gas path module, the heating module and the control module are fixed or mounted through the mounting module, the heating module is provided with at least one cold trap hole channel capable of mounting a cold trap and heating the cold trap, the gas path module can convey gas to the cold trap at the mounting position, and the control module controls the temperature of the heating module and the gas flow of the gas path module. Compared with the prior art, the cold trap aging device provided by the utility model has the following beneficial effects: high-temperature aging treatment is carried out, residues can be quickly and effectively cleaned, the cold trap aging device is suitable for a specific quartz cold trap with small size and poor toughness, and the air tightness of a cold trap interface during long-time high-temperature operation can be ensured while quick operation is carried out.

Description

TECHNICAL FIELD

[0001] The application relates to the field of aging devices, in particular to a cold trap aging device. BACKGROUND

[0002] A cold trap is a device filled with adsorbent inside, used for collecting high-temperature flue gas and concentrating organic matter in the flue gas. For example, Chinese Patent CN211453035U discloses an online pre-concentrator with multi-point and multi-channel blind spot sampling, which uses a quartz cold trap as an enrichment trap; and Chinese Patent CN210427142U discloses a cold trap for an online pre-concentrator, which can be used for enriching dioxin substances in high-temperature flue gas. The components in high-temperature flue gas are complex, and after long-term use of the cold trap, high-boiling-point organic matter in the flue gas is easy to remain on the cold trap filler and the pipe wall, affecting the detection of target substances, and the cold trap residues need to be cleaned regularly. CONTENT OF THE UTILITY MODEL

[0003] The application provides a cold trap aging device which can clean the cold trap residues.

[0004] According to the application, a cold trap aging device is provided, which comprises a gas path module, a heating module, a control module and a mounting module; the gas path module, the heating module and the control module are fixed or mounted through the mounting module, the heating module is provided with at least one cold trap hole capable of mounting a cold trap and heating the cold trap, the gas path module is capable of conveying gas to the cold trap at the mounting position, and the control module controls the temperature of the heating module and the gas flow of the gas path module.

[0005] Compared with the prior art, the cold trap aging device has the following beneficial effects: high-temperature aging treatment of the organic matter remaining on the cold trap can quickly and effectively clean the residues, and it is suitable for small-size and poor-toughness quartz material cold traps, and the cleaning can be quickly completed.

[0006] In an implementable manner, the gas path module is provided with a cold trap quick plug-in interface, a quick tightening mechanism and a gas path block, the gas path block is provided with a gas path joint, the gas path block is provided with a gas path channel, the plug-in interface is in communication with the gas path joint through the gas path channel, and the quick tightening mechanism quickly fixes the cold trap on the plug-in interface by using a driving structure, so that the cold trap can be quickly fixed and mounted, and the installation efficiency is improved, that is, the cold trap is inserted and then fixed by using the quick tightening mechanism.

[0007] In an embodiment, the cold trap quick plug-in interface is provided with a pressing plate, a gasket and an O-ring, the plug-in interface is located in the gas path block, the quick tightening mechanism includes a spring, a pull cable, a pulley and a servo motor; the first end of the spring is connected to the pressing plate, the second end of the spring is connected to the pull cable, the first end of the pull cable passes through the pulley and is connected to the spring, and the second end of the pull cable is connected to the motor shaft; the servo motor is located at the bottom of the gas path block, and the motor shaft is located at the center position; the four pulleys are fixed at the bottom of the gas path block near the four corners, so that the servo motor drives the motor shaft to rotate, can wind the pull cable, pull down the spring through the pull cable, and the spring acts on the pressing plate to make the pressing plate extrude the gasket and the O-ring, the O-ring is deformed to extrude the cold trap, and the sealing and fixing are realized by using the friction force, so as to ensure the air tightness of the cold trap interface during long-time high-temperature operation.

[0008] In an embodiment, the pressing plate is provided with a guide groove, a heating module positioning hole and a gas path block positioning block, and the slot of the guide groove is designed as a circular arc, so that the cold trap is conveniently inserted into the plug-in interface.

[0009] In an embodiment, the control module includes a control circuit board, a multi-way electromagnetic valve, a mass flowmeter and a proportional valve, a gas pressure sensor is arranged on the multi-way electromagnetic valve, and the gas input interface, the proportional valve, the mass flowmeter, the multi-way electromagnetic valve and the gas path block are sequentially connected through pipelines, so that automatic control can be realized through the control circuit board, and frequent manual operation is not required.

[0010] In an embodiment, two adjacent plug-in interfaces are connected to the same gas joint through the gas path channels of the gas path block, and the gas joint is connected to the multi-way electromagnetic valve through pipelines, so that the air flow of two cold traps can be controlled at the same time, the control module is simplified, and the cost is reduced.

[0011] In an embodiment, the heating module includes a heating block, a metal shell, a metal cover plate and a heat preservation layer, two heating rods and a temperature sensor are arranged on the heating block, a plurality of cold trap channels are arranged in the heating block, the plurality of heating rods and the temperature sensor are arranged in the heating block, a plurality of protruding circular rings are arranged on the heating block, a plurality of circular recesses are arranged in the metal shell, a plurality of circular recesses are arranged on the inner surface of the metal cover plate, and a plurality of positioning rods are arranged at the bottom of the metal shell, so that the design facilitates positioning and installation.

[0012] In an embodiment, the installation module includes an upper layer running area, a lower layer electrical area, an operation panel and a top cover, a heat dissipation fan is arranged on each side of the upper layer running area and the lower layer electrical area, an air outlet is arranged on the other side, an activated carbon bag is arranged in the top cover, air outlets are arranged on both sides, a touch screen is arranged on the front of the upper layer running area, a power supply interface and a gas input interface are arranged on the back of the lower layer electrical area, the heating module and the gas path module are located in the upper layer running area, and the control module is located in the lower layer electrical area, so that the heating module, the gas path module and the control module can be better fixed, and the heat dissipation function is realized to avoid affecting the work of the control module.

[0013] In an embodiment, the control circuit board can read real-time data of the mass flow meter, the gas pressure gauge and the temperature sensor; the control circuit board can adjust the opening of the proportional valve, control and select the opening of the multi-way electromagnetic valve, so as to realize automatic control.

[0014] In an embodiment, the control circuit board can control the power-on time of the heating rod by a PID algorithm, so that the temperature is more stable.

[0015] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor to limit the scope of the present application. Other features of the present application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0017] In the drawings, identical or corresponding reference signs indicate identical or corresponding parts.

[0018] Figure 1 The composition structure schematic diagram of the cold trap aging device of the embodiment of the present application is shown;

[0019] Figure 2 The cross-sectional schematic diagram of the heating module of the cold trap aging device of the embodiment of the present application is shown;

[0020] Figure 3 The composition structure schematic diagram of the gas path module of the cold trap aging device of the embodiment of the present application is shown;

[0021] Figure 4 The cross-sectional schematic diagram of the gas path module of the cold trap aging device of the embodiment of the present application is shown;

[0022] Figure 5 The schematic diagram of the quick tightening mechanism of the cold trap aging device of the embodiment of the present application is shown;

[0023] Figure 6 The composition structure schematic diagram of the control module of the cold trap aging device of the embodiment of the present application is shown;

[0024] Figure 7 The composition structure schematic diagram of the installation module of the cold trap aging device of the embodiment of the present application is shown.

[0025] In the drawings:

[0026] 100, heating module; 101, heating block; 102, cold trap channel; 103, heating rod; 104, temperature sensor; 105, metal cover plate; 106, metal shell; 107, thermal insulation layer; 108, positioning rod;

[0027] 200, gas path module; 201, pressing plate; 202, gas path block; 203, gas path joint; 204, spring; 205, pulley; 206, pull cable; 207, servo motor; 208, rotating shaft; 209, polytetrafluoroethylene gasket; 210, perfluoroether O-ring; 211, guide groove; 212, heating module positioning hole; 213, gas path block positioning block; 220, plug-in interface;

[0028] 300, control module; 301, proportional valve; 302, mass flow meter; 303, control circuit board; 304, multi-way electromagnetic valve; 305, gas pressure sensor;

[0029] 400, installation module; 401, top cover; 402, touch screen; 403, fan; 404, air outlet; 405, power interface; 406, activated carbon package; 407, gas input interface. DETAILED DESCRIPTION

[0030] In order to make the purpose, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0031] As shown in Figure 1 and Figure 3 , a cold trap aging device includes a gas path module 200, a heating module 100, a control module 300 and an installation module 400; the gas path module 200, the heating module 100 and the control module 300 are fixed or installed through the installation module 400, the heating module 100 is provided with at least one cold trap channel 102 capable of installing a cold trap and heating the cold trap, especially a cold trap made of quartz, the gas path module 200 is capable of delivering gas to the cold trap at the installation position, and the control module 300 controls the temperature of the heating module 100 and the gas flow of the gas path module 200.

[0032] As shown in Figure 4 and Figure 5As shown, the gas path module 200 is provided with a cold trap quick plug-in interface 220, a quick tightening mechanism and a gas path block 202. The gas path block 202 is provided with a gas path connector 203. The gas path block 202 is provided with a gas path channel. The plug-in interface 220 is in communication with the gas path connector 203 through the gas path channel. The quick tightening mechanism quickly fixes the cold trap in the plug-in interface 220 by using a driving structure.

[0033] As shown in Figure 4 , Figure 5 and Figure 6 , the cold trap quick plug-in interface 220 is provided with a pressing plate 201, a gasket 209 and an O-ring 210. The plug-in interface 220 is located in the gas path block 202. The quick tightening mechanism includes a spring 204, a pull cable 206, a pulley 205 and a servo motor 207. The first end of the spring 204 is connected to the pressing plate 201. The second end of the spring 204 is connected to the pull cable 206. The first end of the pull cable 206 passes through the pulley 205 and is connected to the spring 204. The second end of the pull cable 206 is connected to a motor shaft 208. The servo motor 207 is located at the bottom of the gas path block 202. The motor shaft 208 is located at the center position. The four pulleys 205 are fixed at the bottom of the gas path block 202 near the four corners.

[0034] As shown in Figure 4 , Figure 5 and Figure 6 , the pressing plate 201 is provided with a guide groove 211, a heating module positioning hole 212 and a gas path block positioning block 213. The slot of the guide groove 211 is designed as a circular arc.

[0035] As shown in Figure 7 , the control module 300 includes a control circuit board 303, a multi-way electromagnetic valve 304, a mass flow meter 302 and a proportional valve 301. The multi-way electromagnetic valve 304 is provided with a gas pressure sensor 305. A gas input interface 407, the proportional valve 301, the mass flow meter 302, the multi-way electromagnetic valve 304 and the gas path block 202 are connected in sequence through pipelines.

[0036] As shown in Figure 4 , Figure 5 and Figure 7 , two adjacent plug-in interfaces 220 are in communication with the same gas path connector 203 through the gas path channel of the gas path block 202. The gas path connector 203 is in communication with the multi-way electromagnetic valve 304 through pipelines.

[0037] As shown in Figure 2 and Figure 3As shown in the drawings, the heating module 100 comprises a heating block 101, a metal shell 106, a metal cover plate 105 and a heat preservation layer 107, the heating block 101 is provided with two heating rods 103 and a temperature sensor 104, the heating block 101 is internally provided with a plurality of cold trap channels 102, the plurality of heating rods 103 and the temperature sensor 104 are arranged inside the heating block 101, the heating block 101 is respectively provided with a plurality of protruding circular rings on the upper and lower sides, the metal shell 106 is internally provided with a plurality of circular recesses, the metal cover plate 105 is internally provided with a plurality of circular recesses, and the metal shell 106 is provided with a plurality of positioning rods 108 at the bottom.

[0038] As shown in the drawings, Figure 1 and Figure 7 The installation module 400 is a box structure comprising an upper running area, a lower electrical area, an operation panel and a top cover 401, one side of the upper running area and the lower electrical area is respectively provided with a cooling fan 403, and the other side is provided with an air outlet 404, the top cover 401 is internally provided with an activated carbon bag, and the two sides are provided with gas outlets, the front of the upper running area is provided with a touch screen 402, the back of the lower electrical area is provided with a power supply interface 405 and a gas input interface 407, the heating module 100 and the gas path module 200 are located in the upper running area, and the control module 300 is located in the lower electrical area.

[0039] As shown in the drawings, Figure 7 The control circuit board 303 can read real-time data of the mass flow meter 302, the gas pressure gauge and the temperature sensor 104; the control circuit board 303 can adjust the opening of the proportional valve 301, control and select the open circuit of the multi-way electromagnetic valve 304.

[0040] As shown in the drawings, Figure 1 , Figure 3 and Figure 7 The control circuit board 303 can adjust the power-on duration of the heating rod 103 through the PID algorithm.

[0041] As shown in the drawings, Figures 1-7 The installation module 400 of the embodiment is provided with a top cover 401, the cold trap can pass through the heating module 100 and be inserted into the high-temperature-resistant quick connector of the gas path module 200 by opening the top cover 401, the upper running area is formed after the top cover 401 is closed, the flow, temperature and time are set through the touch screen 402, and the cold trap can be automatically detected and aged after the “start” button is clicked, the cooling fan 403 is automatically started after the aging is completed, and the gas consumption is saved.

[0042] The top cover 401 is internally provided with an activated carbon bag 406, which can adsorb the tail gas of the cold trap aging, so as to avoid pollution of the laboratory environment;

[0043] The heating block 101 of the heating module 100 is made of aluminum alloy, and eight smooth cold trap channels 102, two heating rods 103 and a temperature sensor 104 are arranged in the heating block. The diameter of the cold trap channel 102 is slightly larger than the outer diameter of the cold trap, which can ensure the smooth passing of the cold trap and quickly conduct heat and uniformly heat the cold trap. The upper and lower protrusions of the heating block 101 are respectively inserted into the corresponding recessed positions of the metal cover plate 105 and the metal shell 106 to fix the heating block 101 and protect the cold trap. The positioning rod 108 is aligned with the heating module positioning hole 212 on the gas path module. The thermal insulation layer 107 is filled with aerogel (thermal conductivity 0.018 W / (m·K)) paint, and the thickness is 40 mm, which can ensure that the surface temperature of the heating module is not higher than 50℃ at 400℃ high temperature continuous aging.

[0044] The pressing plate 201 of the gas path module 200 is provided with a guide groove 211 for accurately guiding the quartz cold trap to align with the sealing position. The groove is designed in a circular arc shape to ensure that the cold trap can be smoothly installed without deviation. The gas path block positioning block 213 aligns the pressing plate 201 and the gas path block 202. The quartz cold trap quick plug-in interface 220 adopts a double-layer sealing structure composed of a polytetrafluoroethylene (PTFE) gasket 209 and a perfluoroether (FFKM) O-ring 210. The servo motor 207 of the quick tightening mechanism rotates the shaft 208 to tighten the cable 206 and stretch the spring 204, so as to press the pressing plate 201 to the gasket 209 and the O-ring 210 to ensure the sealing of the cold trap. The double-layer sealing structure and the spring pre-tightening / electrically-driven tightening design can ensure the sealing performance of the cold trap when it is repeatedly plugged and unplugged, and will not fail when used at high temperature for a long time.

[0045] The method for detecting the position of the cold trap by the control module 300 is as follows: the control circuit board 303 opens the proportional valve 301, the gas pressure gauge 305 sends the current pressure of the polytetrafluoroethylene pipeline to the control circuit board 303 in real time, and the electromagnetic valves 304 are opened one by one. If the pressure reading is greater than atmospheric pressure, the corresponding channel of the electromagnetic valve 304 has a cold trap inserted therein, otherwise, no cold trap is inserted. After the detection is completed, the electromagnetic valve 304 with the cold trap channel inserted is opened;

[0046] The control circuit board 303 can read the real-time data of the mass flow meter 302 and adjust the proportional valve 301 according to the set value and the number of cold traps inserted to adjust the flow rate to the set value. After the heat preservation is completed, the control circuit board 303 adjusts the proportional valve 301 to adjust the flow rate to 5-10 mL / min to protect the cold trap and save the carrier gas;

[0047] The control circuit board 303 can read the real-time data of the temperature sensor 104 and adjust the on / off time of the heating rod 103 according to the PID algorithm to stabilize the temperature at the set value. After the heat preservation is completed, the control circuit board 303 starts the fan 403 to accelerate the cooling.

[0048] The aging method of the quartz cold trap aging device is as follows:

[0049] After the aging operation is performed by inserting the cold trap, the servo motor 207 tightens the press plate 201, the proportional valve 301 is opened, and the electromagnetic valves 304 are opened one by one to determine whether the cold trap is inserted in each channel according to the data of the gas pressure sensor 305 and the atmospheric pressure; the electromagnetic valve 304 of the channel with the inserted cold trap is opened, the proportional valve 301 is adjusted, the data of the mass flow meter 302 is set to the flow rate, the programmed temperature rising is performed according to the set temperature gradient; after the aging is completed, the fan 403 starts to operate to accelerate the cooling, the proportional valve 301 is adjusted, and the data of the mass flow meter 302 is set to 5-10 ml / min to save the carrier gas.

[0050] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A cold trap aging device, characterized in that: It includes a gas path module (200), a heating module (100), a control module (300), and an installation module (400); the gas path module (200), the heating module (100), and the control module (300) are fixed or installed through the installation module (400); the heating module (100) has at least one cold trap channel (102) to install and heat the cold trap; the gas path module (200) can deliver gas to the cold trap at the installation location; and the control module (300) controls the temperature of the heating module (100) and the airflow of the gas path module (200).

2. The cold trap aging apparatus according to claim 1, characterized in that: The gas path module (200) is provided with a cold trap quick-plug interface (220), a quick-tightening mechanism and a gas path block (202). The gas path block (202) is provided with a gas path connector (203) and a gas path channel. The plug-in interface (220) is connected to the gas path connector (203) through the gas path channel. The quick-tightening mechanism uses a drive structure to quickly fix the cold trap to the plug-in interface (220).

3. The cold trap aging apparatus according to claim 2, characterized in that: The plug-in interface (220) is provided with a pressure plate (201), a gasket (209) and an O-ring (210). The plug-in interface (220) is located in the air passage block (202). The quick tightening mechanism includes a spring (204), a cable (206), a pulley (205) and a servo motor (207). The first end of the spring (204) is connected to the pressure plate (201), and the second end of the spring (204) is connected to the cable (206). The first end of the cable (206) is connected to the spring (204) through the pulley (205), and the second end of the cable (206) is connected to the motor shaft (208). The servo motor (207) is located at the bottom of the air passage block (202), and the motor shaft (208) is installed at the center of the quick tightening mechanism. The four pulleys (205) are fixed at the bottom of the air passage block (202) near the four corners.

4. The cold trap aging apparatus according to claim 3, characterized in that: The pressure plate (201) is provided with a guide groove (211), a heating module positioning hole (212) and an air passage block positioning block (213). The opening of the guide groove (211) is designed to be arc-shaped.

5. The cold trap aging apparatus according to any one of claims 2-4, characterized in that: The control module (300) includes a control circuit board (303), a multi-way solenoid valve (304), a mass flow meter (302), and a proportional valve (301). The multi-way solenoid valve (304) is equipped with a gas pressure sensor (305). The installation module (400) is equipped with a gas input interface (407). The gas input interface (407), the proportional valve (301), the mass flow meter (302), the multi-way solenoid valve (304), and the gas path block (202) are connected in sequence through pipelines.

6. The cold trap aging apparatus according to claim 5, characterized in that: The two adjacent plug-in interfaces (220) are connected to the same air connector (203) through the air passage of the air block (202), and the air connector (203) is connected to the multi-way solenoid valve (304) through pipelines.

7. The cold trap aging apparatus according to claim 6, characterized in that: The heating module (100) includes a heating block (101), a metal shell (106), a metal cover plate (105), and an insulation layer (107). The heating block (101) is provided with two heating rods (103) and a temperature sensor (104). The heating block (101) is provided with several cold trap channels (102). Several heating rods (103) and temperature sensors (104) are arranged inside the heating block (101). The heating block (101) has several protruding rings on the top and bottom respectively. The metal shell (106) is provided with several circular recesses. The inner surface of the metal cover plate (105) is provided with several circular recesses. The bottom of the metal shell (106) is provided with several positioning rods (108).

8. The cold trap aging apparatus according to claim 7, characterized in that: The installation module (400) includes an upper operating area, a lower electrical area, an operation panel, and a top cover (401). The upper operating area and the lower electrical area are each provided with a cooling fan (403) on their sides and an air outlet (404) on the other side. The top cover (401) is provided with an activated carbon pack and air outlets on both sides. The upper operating area is provided with a touch screen (402) on its front. The lower electrical area is provided with a power interface (405) and a gas input interface (407) on its back. The heating module (100) and the gas circuit module (200) are located in the upper operating area, and the control module (300) is located in the lower electrical area.

9. The cold trap aging apparatus according to claim 8, characterized in that: The control circuit board (303) can read real-time data from the mass flow meter (302), the gas pressure gauge and the temperature sensor (104); the control circuit board (303) can adjust the opening degree of the proportional valve (301) and control and select the open circuit of the multi-way solenoid valve (304).

10. The cold trap aging apparatus according to claim 9, characterized in that: The control circuit board (303) can regulate the energizing time of the heating rod (103) through a PID algorithm.

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