CN218782082U

CN218782082U - Tritium carbon combustion device

Info

Publication number: CN218782082U
Application number: CN202222985322.9U
Authority: CN
Inventors: 马振超; 胡福月; 董伟国
Original assignee: Beijing Hejing Technology Development Co ltd
Current assignee: Beijing Hejing Technology Development Co ltd
Priority date: 2022-11-09
Filing date: 2022-11-09
Publication date: 2023-03-31
Anticipated expiration: 2032-11-09

Abstract

The embodiment of the utility model discloses a tritium-carbon combustion device, which comprises a tritium-carbon combustion assembly and a control assembly; the tritium-carbon combustion assembly comprises: the combustion furnace is internally provided with a heating component for heating the combustion furnace, a humidity sensor which is communicated with an outlet of the combustion furnace and used for measuring the content of water vapor, a flow sensor which is communicated with an inlet of the combustion furnace and used for measuring the gas flow, and a temperature sensor which is arranged in the combustion furnace and used for measuring the temperature; the control assembly includes: a humidity sensing control module which is connected with the humidity sensor and used for detecting the content of the water vapor is arranged; the device comprises a flow sensor, a heating control module, a temperature sensor and a singlechip, wherein the flow sensor is connected with the flow sensor and used for detecting the gas flow, the heating control module is connected with a heating part and used for controlling the heating of a combustion furnace, the temperature sensor is connected with the temperature sensor and used for detecting the temperature of the combustion furnace, and the singlechip is used for controlling the heating control module, the flow sensor, the humidity sensor and the temperature sensor.

Description

Tritium carbon combustion device

Technical Field

The utility model belongs to the technical field of gaseous detection, in particular to be used for gaseous device that detects, concretely relates to tritium carbon burner.

Background

A tritium-carbon combustion furnace is a device for combusting a sample and collecting combustion products of the sample, for example, the invention patent with the application number of CN 2020113939393939393939393973.8 discloses a sample preparation system for a biological sample organic tritium-carbon oxidation furnace, which gathers tritium and carbon 14 in a sample to be detected through a heating system and a collecting system to be detected for subsequent detection, the principle and the structure of the system are similar to those of a common combustion furnace, and key factors such as heating time, combustion temperature, air inflow, vacuum amount and the like cannot be accurately controlled in the operation process, so that the traditional tritium-carbon combustion furnace has the advantages of large potential safety hazard, low operation efficiency and large detection result error.

SUMMERY OF THE UTILITY MODEL

In view of this, some embodiments disclose a tritium-carbon combustion apparatus, comprising:

the tritium-carbon combustion assembly is used for combusting a tritium-carbon sample and converting the tritium-carbon sample into carbon dioxide and water;

the control assembly is connected with the tritium-carbon combustion assembly and is used for controlling the tritium-carbon combustion assembly;

wherein, tritium carbon combustion subassembly includes:

the heating device is used for heating the combustion furnace;

the humidity sensor is communicated with the outlet of the combustion furnace and is used for measuring the water vapor content in the gas at the outlet of the combustion furnace;

the flow sensor is communicated with the inlet of the combustion furnace and is used for measuring the gas flow in the combustion furnace;

the temperature sensor is arranged in the combustion furnace and used for measuring the temperature in the combustion furnace;

the control assembly includes:

the humidity sensing control module is connected with the humidity sensor and used for detecting the water vapor content of the gas at the outlet of the combustion furnace;

the flow sensing control module is connected with the flow sensor and used for detecting the gas flow in the combustion furnace;

the heating control module is connected with the heating component and is used for controlling the heating of the combustion furnace;

the temperature sensing control module is connected with the temperature sensor and used for detecting the temperature in the combustion furnace;

and the singlechip is used for controlling the heating control module, the flow sensing control module, the humidity sensing control module and the temperature sensing control module.

Some embodiments disclose a tritium-carbon combustion apparatus, the humidity sensing control module comprising:

the humidity sensor interface comprises a first connecting port and a second connecting port, and the first connecting port is connected with a power supply;

a first conveyer;

the positive input end of the first transporting and placing device is sequentially connected with a second pull-down capacitor, a first pull-down resistor and a second connector of the humidity sensor interface; the first pull-down resistor, the first pull-down capacitor and the second pull-down capacitor are respectively grounded;

the output port of the first operational amplifier is connected with the first adjusting resistor and the negative input end of the first operational amplifier; the first adjusting resistor is further arranged to be connected with a third pull-down capacitor, a fourth pull-down capacitor and the single chip microcomputer in sequence; the third pull-down capacitor and the fourth pull-down capacitor are grounded;

the lower port of the first transporting and placing device is grounded;

an input power supply and a fifth pull-down capacitor are arranged and connected at an upper port of the first operational amplifier, and the fifth pull-down capacitor is further grounded.

Some embodiments disclose a tritium-carbon combustion apparatus, the temperature sensing control module comprising:

the temperature sensor interface comprises a first connecting port and a second connecting port, and the first connecting port is connected with a power supply;

a second transporting and placing device;

the positive electrode input end of the second operational amplifier is sequentially connected with a seventh pull-down capacitor, a sixth pull-down capacitor, a second pull-down resistor and a second connector of the temperature sensor interface; the second pull-down resistor, the sixth pull-down capacitor and the seventh pull-down capacitor are respectively grounded;

the output end of the second operational amplifier is connected with a second adjusting resistor and the negative input end of the second operational amplifier; the second adjusting resistor is further arranged to be connected with the eighth pull-down capacitor, the ninth pull-down capacitor and the single chip microcomputer in sequence; the eighth pull-down capacitor and the ninth pull-down capacitor are grounded;

the lower end of the second transporting and placing device is grounded;

the upper end of the second operational amplifier is connected with an input power supply and a tenth pull-down capacitor, and the tenth pull-down capacitor is further grounded.

Some embodiments disclose a tritium-carbon combustion apparatus, the flow sensing control module comprising:

the flow sensor interface comprises a first connecting port and a second connecting port, and the first connecting port is connected with a power supply;

a third conveyer;

the positive electrode input end of the third operational amplifier is sequentially connected with a twelfth pull-down capacitor, an eleventh pull-down capacitor, a third pull-down resistor and a second connector of the flow sensor interface; the third pull-down resistor, the eleventh pull-down capacitor and the twelfth pull-down capacitor are respectively grounded;

the output end of the third operational amplifier is connected with a third adjusting resistor and the negative electrode input end of the third operational amplifier; the third adjusting resistor is further arranged to be connected with the thirteenth pull-down capacitor, the fourteenth pull-down capacitor and the single chip microcomputer in sequence; the thirteenth pull-down capacitor and the fourteenth pull-down capacitor are grounded;

the lower end of the third transporting and placing device is grounded.

Some embodiments disclose a tritium-carbon combustion apparatus, the heating control module comprising:

one end of the input resistor is connected with the singlechip, and the other end of the input resistor is sequentially connected with the fourth pull-down resistor and the base electrode of the triode;

the emitter of the triode is grounded, and the collector of the triode is connected with the conduction ends of the electromagnet and the diode;

the electromagnet and the diode are arranged in parallel, the other end of the electromagnet and the diode which are connected in parallel is connected with the control power supply and the fifteenth pull-down capacitor, and the fifteenth pull-down capacitor is further grounded;

the normally connected end of an electromagnetic switch of the electromagnet is connected with a heating power supply, and the connected end of the electromagnet is connected with the singlechip and the heating part; the disconnected end of the electromagnet is connected with the singlechip;

the heating component is connected with the heating power supply through a slide rheostat.

Some embodiments disclose a tritium-carbon combustion device, wherein at least one combustion tube is arranged in a combustion furnace, and each combustion tube is respectively provided with an air inlet pipeline and an air outlet pipeline.

Some embodiments disclose a tritium-carbon combustion apparatus, the combustion assembly further comprising:

the vacuum pump is communicated with the combustion pipe;

the vacuum gauge is used for detecting the vacuum degree in the combustion tube;

and the stop valve is arranged between the vacuum pump and the combustion pipe.

Some embodiments disclose a tritium-carbon combustion apparatus, the control assembly further comprising:

and the protective cover detection module is connected with the single chip microcomputer and the protective cover sensor and used for detecting the opening and closing of the protective cover.

and the alarm control module is connected with the singlechip and configured to alarm according to the instruction information of the singlechip.

Some embodiments disclose a tritium carbon combustion apparatus, a combustion furnace includes a combustion zone and a catalytic zone, and the combustion zone and the catalytic zone are respectively provided with a temperature sensor.

The embodiment of the utility model discloses tritium carbon burner can carry out automatic control to the burning furnace, can carry out dynamic detection to the intensification process of burning furnace, vacuum in the burning furnace, the gas flow in the burning furnace, vapor content etc. has realized automatic accurate control to the combustion process of tritium carbon sample, has improved combustion efficiency, has improved the operation security, has good application prospect in tritium carbon detection technology field.

Drawings

FIG. 1 is a schematic diagram of the composition of a disclosed tritium-carbon combustion apparatus in accordance with certain embodiments;

FIG. 2 is a schematic diagram of a humidity sensing control module according to some embodiments disclosed herein;

FIG. 3 is a schematic diagram of a temperature sensing control module according to some embodiments disclosed herein;

FIG. 4 is a schematic diagram of a flow sensing control module according to some embodiments disclosed herein;

FIG. 5 is a schematic view of a heating control module according to some embodiments disclosed herein.

Reference numerals

1. Combustion assembly 2 control assembly

11. Humidity sensor for combustion furnace 12

13. Temperature sensor 14 flow sensor

21. Single chip microcomputer 22 humidity sensing control module

23. Temperature sensing control module 24 flow sensing control module

25. Heating control module Rb sliding rheostat

J1 First transport and discharge device for humidity sensor interface U1

C1 First pull-down capacitor C2 and second pull-down capacitor

R1 first pull-down resistor R2 first adjusting resistor

C3 Third pull-down capacitor C4 and fourth pull-down capacitor

C5 Fifth pull-down capacitance J2 temperature sensor interface

U2 second operational amplifier C6 sixth pull-down capacitor

C7 Seventh pull-down capacitor R3 second pull-down resistor

R4 second adjusting resistor C8 eighth pull-down resistor

C9 Ninth pull-down resistor C10 tenth pull-down capacitor

J3 Flow sensor interface U3 third fortune puts ware

C11 Eleventh pull-down capacitor C12 twelfth pull-down capacitor

R5 third pull-down resistor R6 third adjusting resistor

C13 Thirteenth pull-down capacitor C14 fourteenth pull-down capacitor

R7 input resistor R8 fourth pull-down resistor

C15 Fifteenth pull-down capacitor K1 electromagnet

Q1 triode D1 diode

J4 Heating power supply J5 heating part

Detailed Description

The word "embodiment" as used herein, is not necessarily to be construed as preferred or advantageous over other embodiments, including any embodiment illustrated as "exemplary". The performance index test in the embodiment of the present invention adopts the conventional test method in the field unless otherwise specified. It is to be understood that the terminology used in the embodiments of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the invention belong; the other test methods and technical means not specifically mentioned in the embodiments of the present invention are all those commonly used by those skilled in the art.

The terms "substantially" and "about" are used herein to describe small fluctuations. For example, they may mean less than or equal to ± 5%, such as less than or equal to ± 2%, such as less than or equal to ± 1%, such as less than or equal to ± 0.5%, such as less than or equal to ± 0.2%, such as less than or equal to ± 0.1%, such as less than or equal to ± 0.05%. Numerical data represented or presented herein in a range format is used merely for convenience and brevity and thus should be interpreted flexibly to include not only the numerical values explicitly recited as the limits of the range, but also to include all the individual numerical values or sub-ranges encompassed within that range. For example, a numerical range of "1 to 5%" should be interpreted to include not only the explicitly recited values of 1% to 5%, but also include individual values and sub-ranges within the indicated range. Thus, included in this numerical range are individual values, such as 2%, 3.5%, and 4%, and sub-ranges, such as 1% to 3%, 2% to 4%, and 3% to 5%, etc. This principle applies equally to ranges reciting only one numerical value. Moreover, such an interpretation applies regardless of the breadth of the range or the characteristics being described.

In this document, including the claims, conjunctions such as "comprising," including, "" carrying, "" having, "" containing, "" involving, "" containing, "and the like are understood to be open-ended, i.e., to mean" including but not limited to. Only the connection words of 'consisting of' 8230 '\' 8230 '; and' consisting of '8230' \ '8230'; are closed connection words.

In the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In the examples, some methods, means, instruments, devices, etc. known to those skilled in the art are not described in detail in order to highlight the gist of the present invention.

Under the prerequisite of conflict not, the utility model discloses technical feature that the embodiment disclosed can make up wantonly, and the technical scheme who obtains belongs to the utility model discloses the content of embodiment disclosure.

In some embodiments, a tritium-carbon combustion apparatus includes:

the tritium-carbon combustion assembly is used for combusting a tritium-carbon sample and converting the tritium-carbon sample into carbon dioxide; generally, a tritium-carbon sample is subjected to combustion reaction and catalytic reaction in a combustion assembly and fully converted into water vapor and carbon dioxide, so that the carbon dioxide can be accurately detected in the subsequent process, and the tritium-carbon sample can be accurately analyzed;

the control assembly is connected with the tritium-carbon combustion assembly and is used for controlling the tritium-carbon combustion assembly; the control assembly is a control function assembly which controls the tritium-carbon combustion assembly to realize the function of the tritium-carbon combustion assembly, and the control assembly automatically controls the tritium-carbon combustion assembly so as to realize the efficient and complete conversion of a tritium-carbon sample in the tritium-carbon combustion assembly;

wherein, tritium carbon combustion subassembly includes:

the heating device is used for heating the combustion furnace;

the control assembly includes:

the heating control module is connected with the heating device and used for controlling the heating of the combustion furnace;

In some embodiments, the combustion furnace body is a cuboid, the combustion zone, the intermediate zone and the catalytic zone are respectively arranged in the combustion furnace body, the gas inlet pipeline is arranged at the end part close to the combustion zone, the gas outlet pipeline is arranged at the end part close to the catalytic zone, the introduced oxidation gas enters the combustion furnace from the gas inlet pipeline, sequentially passes through the heating zone, the intermediate zone and the catalytic zone to react with the tritium carbon sample, and then is output to the collection pipeline from the gas outlet pipeline, the output gas is carbon oxide and water vapor, and carbon dioxide gas and water vapor are further collected.

In some embodiments, a combustion tube is disposed in the combustion furnace, the direction of the combustion tube is the same as the direction of the furnace body of the combustion furnace, a combustion zone, an intermediate zone and a catalytic zone are correspondingly formed in the combustion tube, an air inlet pipeline is disposed and communicated with an inlet of the combustion tube, an air outlet pipeline is disposed and communicated with an outlet of the combustion tube, introduced oxidizing gas enters the combustion tube to be heated, passes through a heating zone, the intermediate zone and the catalytic zone, and is combusted and catalytically reacted with a tritium carbon sample, generated water vapor and carbon dioxide enter a collecting pipeline from the air outlet pipeline, and the generated water vapor and the generated carbon dioxide gas are collected.

In some embodiments, a plurality of combustion tubes are arranged in the combustion furnace, the plurality of combustion tubes are generally arranged in parallel at intervals, and a plurality of tritium-carbon samples can be placed in the plurality of combustion tubes, so that the utilization efficiency of the combustion furnace is improved. Generally, a plurality of combustion tubes are respectively provided with an air inlet pipeline and an air outlet pipeline and are respectively monitored and controlled, a tritium-carbon sample in each combustion tube can independently react, and the reaction process in each combustion tube of the control assembly is independently controlled without mutual interference.

In some embodiments, as shown in fig. 1, the tritium-carbon combustion apparatus includes a tritium-carbon combustion assembly 1 and a control assembly 2, wherein:

the tritium-carbon combustion assembly 1 includes: the combustion furnace 11, wherein a heating component is arranged in the combustion furnace 11 and used for heating the combustion furnace; a humidity sensor 12 is arranged to communicate with an outlet of the combustion furnace 11, a flow sensor 14 is arranged to communicate with an inlet of the combustion furnace 11, and a temperature sensor 13 is arranged in the combustion furnace;

the control assembly 2 includes: the humidity sensing control module 22, the humidity sensing control module 22 is connected with the humidity sensor 12; the flow sensing control module 24, the flow sensing control module 24 is set up and connected with the flow sensor 14; a heating control module 25, the heating control module 25 being connected to a heating element in the furnace 11; the temperature sensing control module 23, the temperature sensing control module 23 is connected with the temperature sensor 13; the single chip microcomputer 21 is connected with the heating control module 25, the flow sensing control module 24, the humidity sensing control module 22 and the temperature sensing control module 23 respectively, and is used for controlling the heating control module 25, the flow sensing control module 24, the humidity sensing control module 22 and the temperature sensing control module 23.

In some embodiments, the air outlet pipeline of the combustion tube is provided with a carbon dioxide sensor, and carbon dioxide is detected under the control of the control assembly.

Usually, a proper singlechip can be selected from the existing singlechips and used as the singlechip in the tritium-carbon combustion device, for example, the singlechip with the model of STM32F103C8 can be selected, the core of the singlechip is 32-bit ARM Cortex-M3, the Tail-changing interruption technology is adopted, and the interruption speed is higher; the host frequency is 72MHz, a 64K flash memory and a 20K RAM are arranged, the working voltage is 3.3V, and LQFP48 packaging is adopted.

Some embodiments disclose a tritium-carbon combustion apparatus, as shown in fig. 2, the humidity sensing control module includes:

the humidity sensor interface J1 comprises a first connecting port and a second connecting port, the first connecting port is connected with a power supply, and the power supply is 12V;

the positive input end of the first operational amplifier U1 is sequentially connected with a second pull-down capacitor C2, a first pull-down capacitor C1, a first pull-down resistor R1 and a second connector of the humidity sensor; the first pull-down resistor R1, the first pull-down capacitor C1 and the second pull-down capacitor C2 are respectively provided with a ground GND;

the output port of the first operational amplifier U1 is connected with the first adjusting resistor R2 and the negative electrode input end of the first operational amplifier U1; the first adjusting resistor R2 is further arranged to be sequentially connected with a third pull-down capacitor C3, a fourth pull-down capacitor C4 and a VOUT-1 port of the single chip microcomputer; the third pull-down capacitor C3 and the fourth pull-down capacitor C4 are grounded GND; the resistance range of the first adjusting resistor R2 is 40K omega-60K omega.

A lower port of the first operational amplifier U1 is provided with a grounding GND;

an input power supply and a fifth pull-down capacitor C5 are arranged and connected at an upper port of the first operational amplifier U1, the fifth pull-down capacitor C5 is further provided with a grounding GND, and the input power supply is VCC-5.

Some embodiments disclose a tritium-carbon combustion apparatus, as shown in fig. 3, wherein the temperature sensing control module includes:

the temperature sensor interface J2 comprises a first connecting port and a second connecting port, the first connecting port is connected with a power supply, and the power supply is set to be 12V;

a second operational amplifier U2; the positive electrode input end of the second operational amplifier U2 is sequentially connected with a seventh pull-down capacitor C7, a sixth pull-down capacitor C6, a second pull-down resistor R3 and a second connector of the temperature sensor interface J2; the second pull-down resistor R3, the sixth pull-down capacitor C6 and the seventh pull-down capacitor C7 are respectively provided with a ground GND;

the output end of the second operational amplifier U2 is simultaneously connected with the second adjusting resistor R4 and the negative input end of the second operational amplifier U2; the second adjusting resistor R4 is further arranged to be sequentially connected with an eighth pull-down capacitor C8, a ninth pull-down capacitor C9 and a port of the single chip microcomputer VOUT-2; the eighth pull-down capacitor C8 and the ninth pull-down capacitor C9 are grounded GND; wherein, the resistance range of the second adjusting resistor R4 is 100K omega-120K omega.

The lower end of the second operational amplifier U2 is provided with a grounding GND;

the upper end of the second operational amplifier U2 is connected with an input power supply and a tenth pull-down capacitor C10, the tenth pull-down capacitor C10 is further connected with a ground GND, and the input power supply is VCC-5.

Some embodiments disclose a tritium-carbon combustion apparatus, as shown in fig. 4, the flow sensing control module includes:

the flow sensor interface J3 comprises a first connecting port and a second connecting port, the first connecting port is connected with a power supply, and the power supply is set to be 12V;

a third operational amplifier U3; the positive electrode input end of the third operational amplifier U3 is sequentially connected with a twelfth pull-down capacitor C12, an eleventh pull-down capacitor C11, a third pull-down resistor R5 and a second connector of the flow sensor interface J3; the third pull-down resistor R5, the eleventh pull-down capacitor C11 and the twelfth pull-down capacitor C12 are respectively provided with a ground GND;

the output end of the third operational amplifier U3 is simultaneously connected with the third adjusting resistor R6 and the negative electrode input end of the third operational amplifier U3; the third adjusting resistor R6 is further arranged to be connected with a thirteenth pull-down capacitor C13, a fourteenth pull-down capacitor C14 and the single chip microcomputer in sequence; the thirteenth pull-down capacitor C13 and the fourteenth pull-down capacitor C14 are grounded GND; wherein, the resistance range of the third adjusting resistor R6 is 20K omega-40K omega.

The lower end of the third operational amplifier U3 is provided with a ground GND.

Some embodiments disclose a tritium-carbon combustion apparatus, as shown in fig. 5, the heating control module including:

one end of the input resistor R7 is connected with a DO2 port of the single chip microcomputer, and the other end of the input resistor R7 is sequentially connected with a fourth pull-down resistor R8 and a base electrode of the triode Q1;

an emitting electrode of the triode Q1 is provided with a grounding GND, and a collector electrode of the triode Q1 is simultaneously connected with the conduction ends of the electromagnet K1 and the diode D1;

the electromagnet K1 is connected with the diode D1 in parallel, the other end of the electromagnet K1 and the other end of the diode D1 which are connected in parallel are connected with a control power supply and a fifteenth pull-down capacitor C15, the fifteenth pull-down capacitor C15 is further provided with a grounding GND, and the control power supply is VCC-12;

the normally connected end of an electromagnetic switch of the electromagnet K1 is connected with a heating power supply J4, and the switch-on end of the electromagnet is connected with an NO2 port of the single chip microcomputer and a heating component J5; the disconnected end of the electromagnet is connected with an NC2 port of the singlechip;

the heating member J5 and the heating power supply J4 are connected by a slide rheostat Rb. The heating power may be set to 220V power.

Some embodiments disclose a tritium-carbon combustion apparatus, the combustion assembly further comprising: the vacuum pump is arranged and communicated with the combustion pipe; the vacuum gauge is used for detecting the vacuum degree in the combustion tube; and the stop valve is arranged between the vacuum pump and the combustion pipe. Generally, a vacuum pump can provide vacuum for a combustion tube, air and interference gas such as carbon dioxide in the combustion tube are discharged, accurate detection of a tritium-carbon sample is prevented, a vacuum gauge detects the vacuum degree in the combustion tube at any time, detection signals are transmitted to a single chip microcomputer of a control assembly at any time, and the single chip microcomputer processes vacuum degree information according to a preset vacuum control program and controls the operation of the vacuum pump; the stop valve can control a connecting passage between the vacuum pump and the combustion pipe and control the operation process of vacuumizing; the cut-off and start-up of the vacuum pump can be automatically carried out under the control of the single chip microcomputer, so that the automation of the operation process of the vacuum system is realized. The cut-off and the start of the vacuum pump can be manually carried out, so that the operation can be manually carried out under the conditions of emergency and the like, and the safety problem is prevented.

Some embodiments disclose a tritium carbon combustion apparatus, control assembly still include visor detection module, set up and be connected with singlechip and visor inductor for detect opening and shutting of visor.

Some embodiments disclose a tritium carbon combustion apparatus, control assembly still include alarm control module, set up and be connected with the singlechip, configure to according to the instruction information of singlechip and report to the police.

Some embodiments disclose a tritium carbon combustion device, control assembly still include touch-sensitive screen interface circuit, set up and be connected with singlechip and touch-sensitive screen for control the touch-sensitive screen.

Some embodiments disclose a tritium-carbon combustion apparatus, combustion furnace includes combustion zone and catalysis district, and combustion zone and catalysis district are provided with temperature sensor respectively. So as to respectively control different areas and control the areas to have different temperatures, thereby being suitable for the reaction requirements of the tritium-carbon sample in the combustion area and the catalytic area.

In some embodiments, the total length of the furnace body of the combustion furnace is not more than 100cm, the total width is not more than 60cm, the total height is not more than 80cm, the total length of the inner cavity is not more than 44cm, the total width is not more than 35cm, the total height is not more than 10cm, three combustion pipes are arranged in the furnace body, and three air inlet pipes are respectively communicated with the three combustion pipes; the pipe diameter of the combustion pipe is not less than 60mm.

In some embodiments, the air inlet pipeline of the combustion pipe is provided and connected with a flow valve, and the air inlet flow speed is controlled to be not more than 1L/min.

In some embodiments, the combustion furnace body is filled with a heat insulation medium, and the heat insulation medium is arranged in the furnace body shell to prevent the heat of the inner cavity from dissipating so as to control the temperature in the inner cavity to be constant; typically, the insulating medium is insulating cotton.

In some embodiments, the heating component in the combustion furnace is an electric heating wire, and the electric heating wire is connected with a heating switch, a switch relay and a heating control module. The heating switch is a coil contact type switch, two ends of the heating switch are respectively connected with an external power supply and a heating wire, the heating wire is connected with the external power supply through a switch relay, and the switch relay is further arranged and connected with the single chip microcomputer; the switch relay is provided with a 5V power supply and is controlled by the singlechip to be switched on or switched off.

In some embodiments, the heating switch is a rheostat, the resistance value of the rheostat can be continuously adjusted between 1K omega and 10K omega, and the adjustment precision can be 10 omega, so that the temperature can be accurately adjusted and controlled.

In some embodiments, the burner protection cover is sealed with a flange seal, or a snap fit joint seal.

In some embodiments, the tritium-carbon combustion process is performed in a tritium-carbon combustion apparatus, and the process comprises:

putting a tritium-carbon sample to be detected and a catalyst into a proper position in a combustion tube, closing a protective cover of the combustion tube, setting a pressure cut-off threshold value, opening a vacuum pump connected with the combustion tube, and pumping out air in the combustion tube, thereby removing carbon dioxide and other interference gases affecting detection accuracy; in general, when the operation is started, the isolation cover of the combustion furnace is opened, the sample to be measured is placed in the sample boat in the combustion area, and then the isolation cover is closed, for example, the pressure threshold of the combustion pipe may be set to 1 · 10 ^-8 mBar, and then starting a vacuum pump; the vacuum pump can be a molecular pump or an ion pump; the pressure in the combustion tube is displayed dynamically on the control panel; the combustion tube is properly heated in the vacuum-pumping process, so that the vacuum-pumping operation process can be accelerated;

the cutoff conditions in the vacuum pumping process are as follows: the vacuum degree in the combustion tube reaches a preset cut-off threshold value; the cut-off mode is as follows: manually closing the vacuum pump according to the number of the combustion pipe pressure indications on the control panel, or controlling the vacuum pump to automatically stop working by the control assembly;

setting a temperature-rising curve according to a tritium-carbon sample to be detected, or selecting a pre-stored temperature-rising curve, heating the temperature of a catalytic zone to at least 800 ℃ at the maximum rate, introducing oxygen from an air inlet of a combustion pipe, controlling the air flow rate to be between 0 and 1L/min, and slowly heating the combustion zone to at least 1200 ℃ while keeping the temperature; generally, the heating temperature of the catalytic zone needs to be specifically selected according to the reaction performance of the catalyst; after heating to the set temperature of the catalytic zone, the combustion zone begins to slowly raise the temperature, and the temperature is maintained at the temperature at which tritium and carbon 14 begin to decompose, so that the tritium-carbon sample in the sample is thoroughly decomposed and combined with the introduced oxygen to generate water vapor and carbon dioxide, and gases which are not completely combusted, such as carbon monoxide and the like, are further combined with the oxygen to generate carbon dioxide when passing through the catalytic zone;

most tritium and carbon 14 in the tritium-carbon sample are combusted and reacted in a combustion zone to form water vapor and carbon dioxide, and a small part of unreacted or incompletely reacted tritium and carbon monoxide reach a catalytic zone through an intermediate zone and continue to react under the action of a catalyst; by tritiated-carbon sample is generally meant a sample containing tritium and/or carbon 14, such as plants, vegetables, meat, fish, shellfish, soil, paint, plastic, and the like;

collecting water vapor and carbon dioxide in the tail gas by using a collecting device while the reaction is carried out; while collecting the water vapor and the carbon dioxide in the tail gas, a humidity sensor and a carbon dioxide concentration sensor which are arranged at the gas outlet of the combustion pipe detect the concentration of the water and the carbon dioxide in the gas generated by the reaction, feed the measured value back to the single chip microcomputer and display the measured value on the control panel in real time;

while the reaction is carried out, a plurality of control and monitoring modules detect the whole combustion furnace simultaneously, and the method specifically comprises the following steps: the flow sensing control module monitors dynamic flow, the temperature sensing control module monitors the temperature in the combustion furnace, the protective cover detection module monitors the state of the combustion protective cover and the like, and detected data are displayed on the control panel in real time.

Generally, the control assembly automatically shuts down the furnace when the steam and carbon dioxide concentration values fall below cut-off thresholds, stopping the combustion operation; alternatively, the furnace may be manually shut down based on the water vapor and carbon dioxide concentration values displayed on the control panel. For example, if the humidity sensor detects that the volume fraction of water vapor in the tail gas is less than 0.001% and the carbon dioxide sensor detects that the volume fraction of carbon dioxide is less than 0.0001%, the reaction is considered complete, and the combustion furnace control system stops heating and continues to feed nitrogen-oxygen mixed gas for half an hour, and then the whole combustion furnace is shut down.

Generally, in the process of heating the combustion furnace, the single chip microcomputer records the heating time length and performs accumulation calculation, alarm control is started after the total heating time length reaches the set time length, and the catalyst is replaced according to the service life of the catalyst. Generally, the setting of the total heating period is determined in accordance with the operating life of the catalyst.

The embodiment of the utility model discloses tritium carbon burner can carry out automatic control to the burning furnace, can carry out dynamic verification to the intensification process of burning furnace, the vacuum in the burning furnace, gas flow, vapor content in the burning furnace etc. has realized automatic accurate control to the combustion process of tritium carbon sample, has improved combustion efficiency, has improved the operation security, has good application prospect in tritium carbon detection technology field.

The embodiment of the present invention discloses technical solutions and technical details disclosed in the embodiments, which are only exemplary illustrations of the inventive concept, do not constitute a limitation to the technical solutions of the embodiments of the present invention, and all the conventional changes, replacements or combinations etc. made by the technical details disclosed in the embodiments of the present invention are all the same inventive concept, and are all within the protection scope of the claims of the present invention.

Claims

1. Tritium carbon combustion apparatus, characterized by comprising:

the tritium-carbon combustion assembly (1) is used for combusting a tritium-carbon sample and converting the tritium-carbon sample into carbon dioxide and water;

the control assembly (2) is connected with the tritium-carbon combustion assembly and is used for controlling the tritium-carbon combustion assembly;

wherein the tritium-carbon combustion assembly (1) comprises:

a combustion furnace (11) in which a heating element is provided for heating the combustion furnace;

a humidity sensor (12) arranged in communication with the outlet of the furnace (11) for measuring the water vapour content of the furnace outlet gas;

a flow sensor (14) disposed in communication with an inlet of the furnace (11) for measuring a gas flow in the furnace;

a temperature sensor (13) disposed in the combustion furnace (11) for measuring a temperature in the combustion furnace;

the control assembly (2) comprises:

the humidity sensing control module (22) is connected with the humidity sensor (12) and is used for detecting the water vapor content of the gas at the outlet of the combustion furnace;

the flow sensing control module (24) is connected with the flow sensor (14) and is used for detecting the gas flow in the combustion furnace;

a heating control module (25) connected with the heating component and used for controlling the heating of the combustion furnace;

the temperature sensing control module (23) is connected with the temperature sensor (13) and is used for detecting the temperature in the combustion furnace;

and the single chip microcomputer (21) is used for controlling the heating control module (25), the flow sensing control module (24), the humidity sensing control module (22) and the temperature sensing control module (23).

2. A tritium-carbon combustion device according to claim 1, characterized in that the humidity sensing control module comprises:

the humidity sensor interface (J1) comprises a first connecting port and a second connecting port, and the first connecting port is connected with a power supply;

a first operational amplifier (U1);

the positive electrode input end of the first operational amplifier (U1) is sequentially connected with a second pull-down capacitor (C2), a first pull-down capacitor (C1), a first pull-down resistor (R1) and a second connector of the humidity sensor interface (J1); the first pull-down resistor (R1), the first pull-down capacitor (C1) and the second pull-down capacitor (C2) are respectively grounded;

the output port of the first operational amplifier (U1) is connected with a first adjusting resistor (R2) and the negative input end of the first operational amplifier (U1); the first adjusting resistor (R2) is further arranged to be connected with a third pull-down capacitor (C3), a fourth pull-down capacitor (C4) and the single chip microcomputer in sequence; the third pull-down capacitor (C3) and the fourth pull-down capacitor (C4) are grounded;

the lower port of the first conveyer (U1) is grounded;

an upper port of the first operational amplifier (U1) is connected with an input power supply and a fifth pull-down capacitor (C5), and the fifth pull-down capacitor (C5) is further grounded.

3. A tritium-carbon combustion device according to claim 1, characterized in that the temperature sensing control module comprises:

the temperature sensor interface (J2) comprises a first connecting port and a second connecting port, and the first connecting port is connected with a power supply;

a second operational amplifier (U2);

the positive electrode input end of the second operational amplifier (U2) is sequentially connected with a seventh pull-down capacitor (C7), a sixth pull-down capacitor (C6), a second pull-down resistor (R3) and a second connector of the temperature sensor interface (J2); the second pull-down resistor (R3), the sixth pull-down capacitor (C6) and the seventh pull-down capacitor (C7) are respectively grounded;

the output end of the second operational amplifier (U2) is connected with a second adjusting resistor (R4) and the negative electrode input end of the second operational amplifier (U2); the second adjusting resistor (R4) is further arranged to be sequentially connected with an eighth pull-down capacitor (C8), a ninth pull-down capacitor (C9) and the single chip microcomputer; the eighth pull-down capacitor (C8) and the ninth pull-down capacitor (C9) are grounded;

the lower end of the second conveying device (U2) is grounded;

the upper end of the second operational amplifier (U2) is connected with an input power supply and a tenth pull-down capacitor (C10), and the tenth pull-down capacitor (C10) is further grounded.

4. A tritium-carbon combustion device according to claim 1, characterized in that the flow sensing control module comprises:

the flow sensor interface (J3) comprises a first connecting port and a second connecting port, and the first connecting port is connected with a power supply;

a third operational amplifier (U3);

the positive electrode input end of the third operational amplifier (U3) is sequentially connected with a twelfth pull-down capacitor (C12), an eleventh pull-down capacitor (C11), a third pull-down resistor (R5) and a second connector of the flow sensor interface (J3); the third pull-down resistor (R5), the eleventh pull-down capacitor (C11) and the twelfth pull-down capacitor (C12) are respectively grounded;

the output end of the third operational amplifier (U3) is connected with a third adjusting resistor (R6) and the negative input end of the third operational amplifier (U3); the third adjusting resistor (R6) is further arranged to be sequentially connected with a thirteenth pull-down capacitor (C13), a fourteenth pull-down capacitor (C14) and the single chip microcomputer; the thirteenth pull-down capacitor (C13) and the fourteenth pull-down capacitor (C14) are grounded;

the lower end of the third operational amplifier (U3) is grounded.

5. A tritiated carbon combustion device according to claim 1, characterized in that the heating control module comprises:

one end of the input resistor (R7) is connected with the single chip microcomputer, and the other end of the input resistor (R7) is sequentially connected with a fourth pull-down resistor (R8) and a base electrode of the triode (Q1);

an emitting electrode of the triode (Q1) is grounded, and a collector electrode of the triode (Q1) is connected with a conducting end of the electromagnet (K1) and the diode (D1);

the electromagnet (K1) and the diode (D1) are arranged in parallel, the other end of the electromagnet (K1) and the other end of the diode (D1) which are connected in parallel are connected with a control power supply and a fifteenth pull-down capacitor (C15), and the fifteenth pull-down capacitor (C15) is further grounded;

the normally connected end of an electromagnetic switch of the electromagnet (K1) is connected with a heating power supply (J4), and the connected end of the electromagnet (K1) is connected with the single chip microcomputer and the heating part (J5); the disconnection end of the electromagnet (K1) is connected with the singlechip;

the heating component (J5) is connected with the heating power supply (J4) through a slide rheostat (Rb).

6. A tritium-carbon combustion device according to claim 1, characterized in that at least one combustion tube is arranged in the combustion furnace, and each combustion tube is respectively provided with an air inlet pipeline and an air outlet pipeline.

7. A tritium-carbon combustion device according to claim 6, characterized in that the combustion assembly further comprises:

the vacuum pump is arranged and communicated with the combustion pipe;

the vacuum gauge is used for detecting the vacuum degree in the combustion pipe;

and the stop valve is arranged between the vacuum pump and the combustion pipe.

8. A tritiated carbon combustion device according to claim 1, characterized in that the control assembly further comprises:

9. A tritiated carbon combustion device according to claim 1, characterized in that the control assembly further comprises:

and the alarm control module is arranged and connected with the single chip microcomputer and is configured to alarm according to the instruction information of the single chip microcomputer.

10. A tritium-carbon combustion device according to claim 1, characterized in that the combustion furnace comprises a combustion zone and a catalytic zone, which are provided with temperature sensors, respectively.