CN219283955U

CN219283955U - Multipath tritium carbon oxidation furnace

Info

Publication number: CN219283955U
Application number: CN202320235141.6U
Authority: CN
Inventors: 陈文涛
Original assignee: Qingdao Nuclear First Electronic Technology Co ltd
Current assignee: Qingdao Nuclear First Electronic Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-06-30
Anticipated expiration: 2033-02-16

Abstract

The utility model relates to a multi-channel tritium carbon oxidation furnace, wherein a tube furnace is positioned above a box body, the left side of the tube furnace is rotationally connected with the box body through a rotating shaft, the right side of the tube furnace is rotationally connected with a push rod of an electric push rod, a shell of the electric push rod is rotationally connected with the box body, a quartz tube penetrates the tube furnace and is fixedly connected with the tube furnace, two ends of the tube furnace are respectively and fixedly connected with sealing plates, a first oxygen tube and a nitrogen connector are respectively and fixedly connected with the sealing plates on the right side of the tube furnace, and a second oxygen tube and a collecting gas pipeline are respectively and fixedly connected with the sealing plates on the left side. The utility model sets the inclined rotary heating tube furnace mode, well avoids the backflow of gas and is more beneficial to the recovery of products; the stainless steel plate type protective cover with meshes is arranged at the exposed parts of the quartz tubes at the two ends of the tube furnace body, the protective cover is open type, flexible and convenient, and can protect operators when the quartz tubes at the outer side of the tube furnace burst, so that the protective cover is safer in tritium carbon extraction experiments.

Description

Multipath tritium carbon oxidation furnace

Technical Field

The utility model relates to the field of detection devices, in particular to a multi-channel tritium carbon oxidation furnace.

Background

With the rapid development of the nuclear industry, more and more tritium is discharged into the environment, and the possible hazards they can pose by entering the organism through various cycles are absolutely not negligible. Tritium does not cause external irradiation damage to organisms, and most of tritium enters the organisms through inhalation, ingestion, skin and other ways, and then internal irradiation is carried out in the organisms, so that biological effects are generated. Tritium enters the human body and causes damage to various factors, such as the content, route and chemical form of tritium

The carbon-14 nucleus consists of 6 protons and 8 neutrons. The half-life period is about 5,730 +/-40 years, the decay mode is beta decay, and the carbon-14 atoms are converted into nitrogen-14 atoms. The human body is more harmful by breathing or directly eating the polluted food.

The existing tritium carbon oxidation furnaces have the defects that gas in a quartz tube is easy to flow back, and the quartz tube is easy to burst due to uneven heating.

Disclosure of Invention

The utility model aims to solve the problems, and provides a multi-channel tritium carbon oxidation furnace, which solves the problem of gas backflow in a quartz tube and solves the problem of operators injury caused by cracking of the quartz tube.

A multi-channel tritium carbon oxidation furnace comprising: the device comprises a box body, a tube furnace, a quartz tube, an electric push rod, a first oxygen tube, a nitrogen connector, a second oxygen tube and a gas collecting pipeline, wherein the tube furnace is positioned above the box body, the left side of the tube furnace is rotationally connected with the box body through a rotating shaft, the right side of the tube furnace is rotationally connected with the push rod of the electric push rod, a shell of the electric push rod is rotationally connected with the box body, the quartz tube penetrates through the tube furnace and is fixedly connected with the tube furnace, two ends of the tube furnace are respectively fixedly connected with sealing plates, the first oxygen tube and the nitrogen connector are respectively fixedly connected with the sealing plates on the right side of the tube furnace, and the second oxygen tube and the gas collecting pipeline are respectively fixedly connected with the sealing plates on the left side.

On the basis of the technical scheme, the tritium collecting bottle and the carbon 14 collecting bottle are further included, a collecting gas pipeline penetrates through the box body to be communicated with the tritium collecting bottle, the two tritium collecting bottles are connected in series through the pipeline, the two carbon 14 collecting bottles are connected in series through the pipeline, and the tritium collecting bottle is connected in series with the carbon 14 collecting bottle through the pipeline.

On the basis of the technical scheme, the tube furnace further comprises a protective cover, two sides of the tube furnace are fixedly connected with the protective cover respectively, the protective cover is sleeved on the outer side of the quartz tube, and a plurality of through holes are formed in the protective cover.

On the basis of the technical scheme, the device further comprises a sample disc and a push rod, wherein the sample disc is positioned in the quartz tube, the sample disc is fixedly connected with the push rod, and the push rod penetrates through the sealing plate on the right side and is in sliding connection with the sealing plate.

On the basis of the technical scheme, the novel sealing device further comprises a conical sleeve and a nut, wherein the conical sleeve is sleeved on the outer side of the push rod, the sealing plate is provided with a pipe body, the push rod penetrates through the pipe body, the conical sleeve is inserted into a gap between the push rod and the pipe body, the nut is in threaded connection with the pipe body, and a stop part is formed inwards of the nut and is in contact with the conical sleeve.

On the basis of the technical scheme, the inside of the tube furnace is divided into a catalytic temperature zone, an oxidation temperature zone and a preheating temperature zone from left to right, and a partition plate is arranged between the oxidation temperature zone and two adjacent temperature zones.

On the basis of the technical scheme, the catalytic device further comprises a copper catalytic net groove and a fixing rod, wherein the copper catalytic net groove is positioned in the catalytic temperature zone and is fixedly connected with the fixing rod, and the copper catalytic net groove is fixedly connected with the left sealing plate.

On the basis of the technical scheme, the tritium collecting bottle is inserted into the cold water tank, the carbon 14 collecting bottle is inserted into the bracket, the cold water tank and the bracket are fixedly connected with the inner wall of the box body respectively, and the cold water tank is provided with a refrigerating device.

On the basis of the technical scheme, the device further comprises a pressure vacuum gauge and universal wheels, two ends of the quartz tube are respectively and fixedly connected with the pressure vacuum gauge, and the lower part of the box body is fixedly connected with the universal wheels.

On the basis of the technical scheme, the tube furnace is fixedly connected with a plurality of quartz tubes, and the quartz tubes are arranged on the same horizontal plane.

The utility model has the following advantages:

1. the inclined rotary heating tube furnace mode is arranged, so that the backflow of gas is well avoided, and the recovery of products is facilitated;

2. the special clamp for the sample tray is arranged, and the special clamp is provided with marks of three temperature areas, so that the sample can be accurately arranged in the designated temperature area, and the sample tray can be taken out of the quartz tube more conveniently;

3. the stainless steel plate type protective cover with meshes is arranged at the exposed parts of the quartz tubes at the two ends of the tube furnace body, and the protective cover is open, flexible and convenient, can protect operators when the quartz tubes at the outer side of the tube furnace burst, and is safer in tritium carbon extraction experiments;

4. secondary pollution can not be caused in the sample oxidation process, and the tritium carbon recovery rate is high.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is apparent that the drawings in the following description are only one embodiment of the present utility model, and that other embodiments of the drawings may be derived from the drawings provided without inventive effort for a person skilled in the art.

Fig. 1: schematic diagram of the front view cross-section structure (tube furnace level) of the utility model;

fig. 2: schematic diagram of the front cross-sectional structure of the utility model (tube furnace tilting);

fig. 3: schematic top-down cross-sectional structure of the tube furnace;

fig. 4: a partial enlarged view at a in fig. 1.

Detailed Description

The utility model is further illustrated by the following figures and examples:

embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Embodiment one:

as shown in fig. 1 to 4, the present embodiment provides a multi-channel tritium carbon oxidation furnace, including: the device comprises a box body 1, a tube furnace 2, a quartz tube 3, an electric push rod 15, a first oxygen tube 31, a nitrogen connector 32, a second oxygen tube 33 and a gas collecting pipeline 34, wherein the tube furnace 2 is positioned above the box body 1, the left side of the tube furnace 2 is rotationally connected with the box body 1 through a rotating shaft 24, the right side of the tube furnace 2 is rotationally connected with the push rod of the electric push rod 15, a shell of the electric push rod 15 is rotationally connected with the box body 1, the quartz tube 3 penetrates the tube furnace 2 and is fixedly connected with the tube furnace 2, two ends of the tube furnace 2 are respectively fixedly connected with a sealing plate 4, the first oxygen tube 31 and the nitrogen connector 32 are respectively fixedly connected with the sealing plate 4 on the right side of the tube furnace 2, and the second oxygen tube 33 and the gas collecting pipeline 34 are respectively fixedly connected with the sealing plate 4 on the left side.

On the basis of the technical scheme, the tritium collecting bottle further comprises a tritium collecting bottle 101 and a carbon 14 collecting bottle 111, the collecting gas pipeline 34 penetrates through the box body 1 to be communicated with the tritium collecting bottle 101, the two tritium collecting bottles 101 are connected in series through the pipeline, the two carbon 14 collecting bottles 111 are connected in series through the pipeline, and the tritium collecting bottle 101 is connected in series with the carbon 14 collecting bottle 111 through the pipeline.

On the basis of the technical scheme, the furnace tube furnace device further comprises a protective cover 8, two sides of the tube furnace 2 are fixedly connected with the protective cover 8 respectively, the protective cover 8 is sleeved on the outer side of the quartz tube 3, and a plurality of through holes are formed in the protective cover 8.

On the basis of the technical scheme, the device further comprises a sample disc 5 and a push rod 6, wherein the sample disc 5 is positioned inside the quartz tube 3, the sample disc 5 is fixedly connected with the push rod 6, and the push rod 6 penetrates through the sealing plate 4 on the right side and is in sliding connection with the sealing plate 4. The surface of the push rod 6 is formed with a plurality of marks or logos.

On the basis of the technical scheme, the novel sealing device further comprises a conical sleeve 13 and a nut 14, wherein the conical sleeve 13 is sleeved on the outer side of the push rod 6, the sealing plate 4 is provided with a pipe body 41, the push rod 6 penetrates through the pipe body 41, the conical sleeve 13 is inserted into a gap between the push rod 6 and the pipe body 41, the nut 14 is in threaded connection with the pipe body 41, a stop part is formed inwards of the nut 14, and the stop part is in contact with the conical sleeve 13.

On the basis of the technical scheme, the inside of the tube furnace 2 is divided into a catalytic temperature zone 21, an oxidation temperature zone 22 and a preheating temperature zone 23 from left to right, and a partition plate is arranged between the oxidation temperature zone 22 and two adjacent temperature zones.

On the basis of the technical scheme, the catalytic system further comprises a copper catalytic net groove 7 and a fixed rod 71, wherein the copper catalytic net groove 7 is positioned in the catalytic temperature zone 21, the copper catalytic net groove 7 is fixedly connected with the fixed rod 71, and the copper catalytic net groove 7 is fixedly connected with the left sealing plate 4.

On the basis of the technical scheme, the tritium collecting bottle is inserted into the cold water tank 10, the tritium collecting bottle 101 is inserted into the cold water tank 10, the carbon 14 collecting bottle 111 is inserted into the bracket 11, the cold water tank 10 and the bracket 11 are fixedly connected with the inner wall of the box body 1 respectively, and the cold water tank 10 is provided with a refrigerating device.

On the basis of the technical scheme, the quartz tube type vacuum gauge further comprises a pressure vacuum gauge 9 and universal wheels 12, two ends of the quartz tube 3 are respectively fixedly connected with the pressure vacuum gauge 9, and the lower part of the box body 1 is fixedly connected with the universal wheels 12.

On the basis of the technical scheme, the tube furnace 2 is fixedly connected with a plurality of quartz tubes 3, and the quartz tubes 3 are arranged on the same horizontal plane.

The operation steps are as follows:

step 1, before an experiment, firstly checking whether vulnerable parts of the whole tube furnace 2 are intact or not, wherein the vulnerable parts comprise a quartz tube 3, a pressure gauge vacuum 9, and a ventilation tube, a tritium collecting bottle 101, a bracket 11 and a carbon 14 collecting bottle 111; if the pulp cannot be seen, the sealing plates 4 at the two ends of the quartz tube 3 can be connected in advance, nitrogen is introduced from the nitrogen connector 32, the flow rate is set to be 100ml/min, the collecting bottle is not connected, the collecting gas pipeline 34 is directly inserted into the water in the cold water tank 10 to see whether bubbling exists, and if the bubbling exists, the air tightness is good. Closing the nitrogen inlet and removing the sealing plate 4. Experiments were prepared.

And step 2, weighing 60g of biological sample to be measured, placing the biological sample into a sample tray 5, placing the sample tray 5 into a preheating temperature zone 23 according to the mark through a push rod 6, fixing a sealing plate 4, and simultaneously connecting a first oxygen pipe 31 and a nitrogen connector 32 on the right side.

And 3, placing the copper catalytic net groove 7 containing the catalyst at the left side of the second oxygen pipe 33 of the catalytic temperature zone 21. The sealing plate 4 on the left side of the furnace is fixed and sealed, two tritium collecting bottles are placed into a clamping groove of the cold water tank 10, and are cooled by-20 degrees. 300ml of sodium hydroxide solution is weighed and placed into two carbon 14 collecting bottles 111 respectively, the two carbon 14 collecting bottles 111 are horizontally placed in clamping positions at two sides of a bracket 11, an outlet of a tritium collecting bottle 101 is connected to an inlet end of the carbon 14 collecting bottle 111 through a high-temperature-resistant air pipe, and the collecting bottles are sequentially connected in series.

And 4, introducing nitrogen into the quartz tube 3 through the nitrogen connector 32 at a flow rate of 100ml/min, and increasing the flow rate according to actual conditions. The purpose of this step is to purge the air from the quartz tube 4. When the pressure of the vacuum gauge 9 is stable, the first oxygen pipe 31 on the right side is opened, and at the moment, the smaller oxygen flow rate is adjusted as much as possible, for example, 30ml/min, whether bubbles are generated in the carbon 14 collecting bottle 111 on the left side or not is observed, and if so, the oxygen flow rate can be increased to 120ml/min;

and 5, after the working preparation of the steps 1 to 4 is finished, turning on a power switch of the tube furnace 2, setting the lifting amplitude of the rotation of the tube furnace 2 within a range of 10 to 30 degrees, and setting the switching value according to a program. After the electric push rod 15 adjusts the tube furnace 2 to a proper position, the temperature of the preheating temperature zone 23 is set to 300 ℃ (which is a heat preservation value); the temperature of the oxidation temperature zone 22 is 500 ℃ (which is a heat preservation value); the temperature of the catalytic temperature zone 21 is 800 ℃ (which is a heat preservation value), and in order to avoid the phenomenon of temperature rise in each temperature zone, the catalytic temperature zone can be arranged in a plurality of sections, for example, 600 ℃, 700 ℃ and 800 ℃ are arranged in the catalytic temperature zone 3, so that the temperature of the catalytic temperature zone reaches the set 800 ℃ in a layer-by-layer manner, and the heat preservation time is set for the temperature section of each temperature zone for different samples. The sample is heated in the preheating temperature zone 23 and the oxidation temperature zone 22, and if the sample is not completely oxidized, the sample is fully and thoroughly oxidized under the action of a catalyst (noble metal) in the copper mesh tank 7 under the action of gas. The cover of the catalytic temperature zone 23 can be opened during the process, and the reaction condition of the biological sample is observed, and the sample is white and gray after the oxidation is completely completed. Manually stopping the power supply according to the observation; meanwhile, according to the experimental value of each sample experiment, the power supply can be automatically stopped through the heat preservation time setting of each temperature section, and the circulating cold water tank 10 is turned off.

During the process of driving the sample tray 5 to move, the nut 14 is firstly loosened from the tube body 41, the nut 14 does not press the conical sleeve 13 any more, and the displacement of the push rod 16 relative to the tube furnace 2 and the quartz tube 3 is judged according to the identification. The nut 14 is then tightened to compress the conical sleeve 13, thereby securing the push rod 16 and the tube 41.

And 6, removing the two tritium collecting bottles 101 from the circulating cold water tank 10, and then removing the two carbon 14 collecting bottles 111 from the bracket 11 to be tested.

And 7, disconnecting each gas path, removing the sealing plate 4 at the right end of the quartz tube 3, and taking out the sample disc 17.

And 8, detaching the sealing plate 4 at the left end of the quartz tube, taking out the copper catalysis net groove 7, and recovering the catalyst in the copper catalysis net groove 7 to a garbage disposal position in a laboratory.

Wherein, every temperature zone of tubular furnace temperature control system all is furnished with thermocouple temperature measuring device, and the accessible touch-sensitive screen sets up the different temperature sections of temperature zone, can accurate grasp every sample temperature, and the temperature does not have the phenomenon of punching.

One or more quartz tubes 3 may be fixed in the tube furnace 2, and two quartz tubes 3 are fixed as shown in fig. 3.

The present utility model has been described above by way of example, but the present utility model is not limited to the above-described embodiments, and any modifications or variations based on the present utility model fall within the scope of the present utility model.

Claims

1. A multi-channel tritium carbon oxidation furnace, comprising: the novel oxygen tube furnace comprises a box body (1), a tube furnace (2), a quartz tube (3), an electric push rod (15), a first oxygen tube (31), a nitrogen connector (32), a second oxygen tube (33) and a collecting gas pipeline (34), wherein the tube furnace (2) is located above the box body (1), the left side of the tube furnace (2) is rotationally connected with the box body (1) through a rotating shaft (24), the right side of the tube furnace (2) is rotationally connected with a push rod of the electric push rod (15), the shell of the electric push rod (15) is rotationally connected with the box body (1), the quartz tube (3) penetrates the tube furnace (2) and is fixedly connected with the tube furnace (2), two ends of the tube furnace (2) are fixedly connected with sealing plates (4), the first oxygen tube (31) and the nitrogen connector (32) are respectively fixedly connected with the sealing plates (4) on the right side of the tube furnace (2), and the second oxygen tube (33) and the collecting gas pipeline (34) are respectively fixedly connected with the sealing plates (4) on the left side.

2. The multi-channel tritium carbon oxidation furnace of claim 1, wherein: the device further comprises a tritium collecting bottle (101) and a carbon 14 collecting bottle (111), wherein a collecting gas pipeline (34) penetrates through the box body (1) to be communicated with the tritium collecting bottle (101), the two tritium collecting bottles (101) are connected in series through the pipeline, the two carbon 14 collecting bottles (111) are connected in series through the pipeline, and the tritium collecting bottle (101) is connected in series with the carbon 14 collecting bottle (111) through the pipeline.

3. The multi-channel tritium carbon oxidation furnace of claim 1, wherein: the quartz tube furnace is characterized by further comprising a protective cover (8), wherein two sides of the tube furnace (2) are fixedly connected with the protective cover (8) respectively, the protective cover (8) is sleeved on the outer side of the quartz tube (3), and a plurality of through holes are formed in the protective cover (8).

4. The multi-channel tritium carbon oxidation furnace of claim 1, wherein: the device also comprises a sample disc (5) and a push rod (6), wherein the sample disc (5) is positioned inside the quartz tube (3), the sample disc (5) is fixedly connected with the push rod (6), and the push rod (6) penetrates through the sealing plate (4) on the right side and is in sliding connection with the sealing plate (4).

5. The multi-channel tritium carbon oxidation furnace of claim 4, wherein: still include toper cover (13) and nut (14), toper cover (13) suit is in push rod (6) outside, and closing plate (4) are formed with body (41), and push rod (6) pass body (41), and the gap of push rod (6) and body (41) is inserted to toper cover (13), nut (14) and body (41) threaded connection, and nut (14) inwards are formed with backstop portion, backstop portion and toper cover (13) contact.

6. The multi-channel tritium carbon oxidation furnace of claim 1, wherein: the inside of the tube furnace (2) is divided into a catalytic temperature zone (21), an oxidation temperature zone (22) and a preheating temperature zone (23) from left to right, and a partition plate is arranged between the oxidation temperature zone (22) and two adjacent temperature zones.

7. The multi-channel tritium carbon oxidation furnace of claim 6, wherein: the catalytic device further comprises a copper catalytic net groove (7) and a fixed rod (71), wherein the copper catalytic net groove (7) is positioned in the catalytic temperature zone (21), the copper catalytic net groove (7) is fixedly connected with the fixed rod (71), and the copper catalytic net groove (7) is fixedly connected with the left sealing plate (4).

8. A multi-channel tritium carbon oxidation furnace as claimed in claim 2, wherein: the device further comprises a cold water tank (10) and a support (11), wherein the tritium collecting bottle (101) is inserted into the cold water tank (10), the carbon 14 collecting bottle (111) is inserted into the support (11), the cold water tank (10) and the support (11) are fixedly connected with the inner wall of the box body (1) respectively, and the cold water tank (10) is provided with a refrigerating device.

9. The multi-channel tritium carbon oxidation furnace of claim 1, wherein: the device also comprises a pressure vacuum gauge (9) and universal wheels (12), wherein two ends of the quartz tube (3) are respectively and fixedly connected with the pressure vacuum gauge (9), and the lower part of the box body (1) is fixedly connected with the universal wheels (12).

10. The multi-channel tritium carbon oxidation furnace of claim 1, wherein: the tube furnace (2) is fixedly connected with a plurality of quartz tubes (3), and the quartz tubes (3) are arranged on the same horizontal plane.