Secondary thermal desorption instrument with heat recovery structure

Abstract

The utility model relates to thermal desorption appearance technical field discloses a secondary thermal desorption appearance with heat recovery structure, including organism, the inside of organism is provided with heat recovery mechanism, the inside of organism is provided with rotary table, heat recovery mechanism includes recovery box, the bottom fixedly connected with motor of recovery box, motor output fixedly connected with test -tube tray, the inner wall fixedly connected with air -ejecting pump of recovery box, the air -ejecting pump fixedly connected with heat recovery pipe of air -intake. The utility model through starting air -ejecting pump through heat recovery pipe will produce the exhaust heat gas in the thermal desorption process inhale, and through the air outlet blows hot air to the sample test tube of plugging in test -tube tray, realizes preheating function, and test -tube tray is driven to rotate by motor, and the contact uniformity of hot air and sample test tube is improved, and the waste heat is recycled in sample preheating, and the energy required for heating main cavity is reduced, and the operation energy consumption is reduced significantly.

Description

Technical Field

[0001] This utility model relates to the field of thermal desorption instrument technology, and in particular to a secondary thermal desorption instrument with a heat recovery structure. Background Technology

[0002] Secondary thermal desorption is one of the methods for detecting pollutant content in air and exhaust gas. It involves collecting air or exhaust gas samples using a sampling tube. The pollutants in the air or exhaust gas are adsorbed by the adsorbent in the sampling tube. The sampling tube is then placed in the secondary thermal desorption instrument, where the thermal desorption device heats a set section of the sampling tube at a set temperature for a set time. The analyte chemical substance adsorbed by the adsorbent in the sampling tube is desorbed and directly introduced into the analytical instrument for analysis.

[0003] Secondary thermal desorption is also a sample pretreatment device in gas chromatography analysis and detection systems. It mainly uses physical methods to heat and adsorb samples to purify them. The basic principle is to inject the sample to be tested into an adsorption tube filled with adsorbent, where volatile components are adsorbed and eliminated. The remaining sample in the adsorption tube is then heated to desorb the collected volatile organic compounds. The sample to be tested is then carried by an inert carrier gas into a capillary gas chromatograph equipped with a flame ionization detector for analysis. Most current secondary thermal desorption devices refer to secondary thermal desorption devices, which can basically meet current usage requirements.

[0004] Traditional thermal desorption instruments generate a large amount of heat during the heating process, which is usually directly discharged without effective recovery and utilization, resulting in high energy consumption and low thermal efficiency. To address this issue, a secondary thermal desorption instrument with a heat recovery structure is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a secondary thermal desorption instrument with a heat recovery structure, which aims to solve the problem that the thermal desorption instrument in the prior art generates a large amount of heat during the heating process, which is usually directly discharged and cannot be effectively recovered and utilized, resulting in high energy consumption and low thermal efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a secondary thermal desorption instrument with a heat recovery structure, comprising a body, wherein a heat recovery mechanism is provided inside the body, and a turntable is provided inside the body;

[0007] The heat recovery mechanism includes a recovery box, a motor is fixedly connected to the bottom of the recovery box, a test tube tray is fixedly connected to the output end of the motor, an air pump is fixedly connected to the inner wall of the recovery box, a heat recovery pipe is fixedly connected to the air pump's air intake, and a hydraulic cylinder is fixedly connected to the bottom wall of the recovery box.

[0008] As a further description of the above technical solution: the inner wall of the recycling box is provided with an air blowing port, and the air outlet of the air pump is connected to the air blowing port.

[0009] As a further description of the above technical solution: a preheating cavity is provided on the front of the machine body, the rear end of the hydraulic cylinder is fixedly connected to the inner wall of the preheating cavity, and the outer wall of the recycling box is inserted into the inner wall of the preheating cavity.

[0010] As a further description of the above technical solution: a control panel is fixedly connected to the front of the machine body, a first cover plate is fixedly connected to the inner wall of the recycling box, a through hole is opened in the middle of the first cover plate, the top of the test tube tray is located in the middle of the through hole, and a second cover plate is fixedly connected to the inner wall of the recycling box.

[0011] As a further description of the above technical solution: the recycling box is provided with an auxiliary mechanism, the auxiliary mechanism including a rotating shaft, the lower end of which is rotatably connected to the inner wall of the recycling box through a bearing.

[0012] As a further description of the above technical solution: a gear is fixedly connected to the lower end of the outer wall of the rotating shaft, and a toothed ring is fixedly connected to the lower end of the outer wall of the test tube tray.

[0013] As a further description of the above technical solution: the outer wall of the gear ring meshes with the outer wall of the gear, and a fan blade is fixedly connected to the outer wall of the rotating shaft.

[0014] As a further description of the above technical solution: the upper end of the rotating shaft is rotatably connected to the bottom of the first cover plate via a bearing.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the waste heat gas generated during the thermal desorption process is drawn in through the heat recovery pipe by starting the air pump, and the hot air is blown to the sample test tubes inserted on the test tube tray through the air outlet to achieve the preheating function. The test tube tray is driven to rotate by the motor, which improves the uniformity of contact between the hot air and the sample test tubes, reuses the waste heat for sample preheating, reduces the energy required for heating the main cavity, and significantly reduces the operating energy consumption.

[0017] 2. In this utility model, when the test tube disc rotates, the meshing of the gear ring and gear can drive the rotating shaft and fan blades to rotate, further enhancing the flow of hot air in the recovery box, improving heat transfer efficiency, shortening the heating time, and improving the overall thermal desorption treatment efficiency. Attached Figure Description

[0018] Figure 1 This is a front view of a secondary thermal desorption apparatus with a heat recovery structure proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the recovery box structure of a secondary thermal desorption device with a heat recovery structure proposed in this utility model.

[0020] Figure 3 This is a schematic cross-sectional view of the recovery box structure of a secondary thermal desorption instrument with a heat recovery structure proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the recovery box delivery of a secondary thermal desorption instrument with a heat recovery structure proposed in this utility model.

[0022] Figure 5 This is a schematic diagram of the test tube tray structure of a secondary thermal desorption instrument with a heat recovery structure proposed in this utility model.

[0023] Figure 6 This is a schematic diagram of the auxiliary mechanism of a secondary thermal desorption instrument with a heat recovery structure proposed in this utility model.

[0024] Legend:

[0025] 1. Main body; 2. Heat recovery mechanism; 201. Recovery box; 202. Motor; 203. Test tube tray; 204. Air pump; 205. Heat recovery pipe; 206. Hydraulic cylinder; 207. First cover plate; 208. Second cover plate; 209. Air outlet; 3. Auxiliary mechanism; 301. Gear ring; 302. Gear; 303. Rotating shaft; 304. Fan blade; 4. Turntable; 5. Preheating chamber; 6. Control panel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Reference Figure 1 - Figure 3 The present invention provides an embodiment of a secondary thermal desorption instrument with a heat recovery structure, comprising a body 1, a heat recovery mechanism 2 disposed inside the body 1, and a turntable 4 disposed inside the body 1.

[0028] The heat recovery mechanism 2 includes a recovery box 201. A motor 202 is fixedly connected to the bottom of the recovery box 201. A test tube tray 203 is fixedly connected to the output end of the motor 202. The test tube tray 203 facilitates the placement of sample test tubes. An air pump 204 is fixedly connected to the inner wall of the recovery box 201. A heat recovery pipe 205 is fixedly connected to the air extraction port of the air pump 204. A hydraulic cylinder 206 is fixedly connected to the bottom wall of the recovery box 201. One end of the heat recovery pipe 205 is connected to the heat dissipation surface of the thermal desorption instrument through a soft conduit to realize the recovery and utilization of heat. The air pump 204 draws in hot air and then delivers it to the air outlet 209. The air outlet 209 blows the hot air onto the sample test tubes inserted on the test tube tray 203 to preheat the sample test tubes.

[0029] The inner wall of the recycling box 201 is provided with an air blowing port 209, and the air outlet of the air pump 204 is connected to the air blowing port 209.

[0030] Reference Figure 3 The front of the machine body 1 is provided with a preheating chamber 5. The rear end of the hydraulic cylinder 206 is fixedly connected to the inner wall of the preheating chamber 5. The outer wall of the recycling box 201 is inserted into the inner wall of the preheating chamber 5. Activating the hydraulic cylinder 206 can push the recycling box 201 out of the preheating chamber 5.

[0031] A control panel 6 is fixedly connected to the front of the main body 1. A first cover plate 207 is fixedly connected to the inner wall of the recycling box 201. A through hole is opened in the middle of the first cover plate 207. The top of the test tube tray 203 is located in the middle of the through hole. A second cover plate 208 is fixedly connected to the inner wall of the recycling box 201. The second cover plate 208 can protect the vacuum pump 204 and prevent the vacuum pump 204 from being exposed.

[0032] Reference Figure 4 - Figure 6 An auxiliary mechanism 3 is provided inside the recycling box 201. The auxiliary mechanism 3 includes a rotating shaft 303. The lower end of the rotating shaft 303 is rotatably connected to the inner wall of the recycling box 201 through a bearing. A gear 302 is fixedly connected to the lower end of the outer wall of the rotating shaft 303. A gear ring 301 is fixedly connected to the lower end of the outer wall of the test tube tray 203. The outer wall of the gear ring 301 meshes with the outer wall of the gear 302. The rotation of the test tube tray 203 causes the gear ring 301 to drive the gear 302 to rotate, thereby causing the rotating shaft 303 to rotate and its fan blades 304 to fan the air inside the recycling box 201, thereby improving the heat transfer efficiency inside the recycling box 201. The fan blades 304 are fixedly connected to the outer wall of the rotating shaft 303. The upper end of the rotating shaft 303 is rotatably connected to the bottom of the first cover plate 207 through a bearing.

[0033] Working principle: By starting the vacuum pump 204, the waste heat gas generated during the thermal desorption process is drawn in through the heat recovery pipe 205, and the hot air is blown onto the sample test tubes inserted into the test tube tray 203 through the air outlet 209 to achieve the preheating function. The recovery box 201 is set in the preheating chamber 5 and is moved back and forth by the hydraulic cylinder 206 to facilitate the loading and unloading of samples. The test tube tray 203 is driven to rotate by the motor 202 to improve the uniformity of contact between the hot air and the sample test tubes. When the test tube tray 203 rotates, the gear ring 301 meshes with the gear 302, driving the rotating shaft 303 and the fan blade 304 to rotate synchronously, further enhancing the flow of hot air in the recovery box 201 and improving the heat transfer efficiency.

[0034] It is worth noting that in this embodiment, the electrical equipment is a common device in the prior art, and the model used can be customized according to actual usage requirements. The power supply interface of the electrical equipment in this utility model is connected to the power supply system through a switch (not shown in the figure) and a wire (not shown in the figure) to realize its control. The circuits and controls involved are all prior art and are known in the current field, so they will not be described in detail here.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A secondary thermal desorption apparatus with a heat recovery structure, comprising a body (1), characterized in that: The body (1) is equipped with a heat recovery mechanism (2) and a turntable (4) inside the body (1); The heat recovery mechanism (2) includes a recovery box (201), a motor (202) is fixedly connected to the bottom of the recovery box (201), a test tube tray (203) is fixedly connected to the output end of the motor (202), a vacuum pump (204) is fixedly connected to the inner wall of the recovery box (201), a heat recovery pipe (205) is fixedly connected to the suction port of the vacuum pump (204), and a hydraulic cylinder (206) is fixedly connected to the bottom wall of the recovery box (201).

2. The secondary thermal desorption apparatus with a heat recovery structure according to claim 1, characterized in that: The inner wall of the recycling box (201) is provided with an air outlet (209), and the air outlet of the air pump (204) is connected to the air outlet (209).

3. The secondary thermal desorption apparatus with a heat recovery structure according to claim 1, characterized in that: The front of the machine body (1) is provided with a preheating cavity (5), the rear end of the hydraulic cylinder (206) is fixedly connected to the inner wall of the preheating cavity (5), and the outer wall of the recycling box (201) is inserted into the inner wall of the preheating cavity (5).

4. The secondary thermal desorption apparatus with a heat recovery structure according to claim 1, characterized in that: The front of the body (1) is fixedly connected to a control panel (6), the inner wall of the recycling box (201) is fixedly connected to a first cover plate (207), the middle of the first cover plate (207) is provided with a through hole, the top of the test tube tray (203) is located in the middle of the through hole, and the inner wall of the recycling box (201) is fixedly connected to a second cover plate (208).

5. A secondary thermal desorption apparatus with a heat recovery structure according to claim 1, characterized in that: The recycling box (201) is provided with an auxiliary mechanism (3), which includes a rotating shaft (303). The lower end of the rotating shaft (303) is rotatably connected to the inner wall of the recycling box (201) through a bearing.

6. A secondary thermal desorption apparatus with a heat recovery structure according to claim 5, characterized in that: A gear (302) is fixedly connected to the lower end of the outer wall of the rotating shaft (303), and a gear ring (301) is fixedly connected to the lower end of the outer wall of the test tube tray (203).

7. A secondary thermal desorption apparatus with a heat recovery structure according to claim 6, characterized in that: The outer wall of the gear ring (301) meshes with the outer wall of the gear (302), and the outer wall of the rotating shaft (303) is fixedly connected with a fan blade (304).

8. A secondary thermal desorption apparatus with a heat recovery structure according to claim 7, characterized in that: The upper end of the rotating shaft (303) is rotatably connected to the bottom of the first cover plate (207) via a bearing.

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