CN113155320B - Combustion heat measuring method - Google Patents
Combustion heat measuring method Download PDFInfo
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- CN113155320B CN113155320B CN202110272254.9A CN202110272254A CN113155320B CN 113155320 B CN113155320 B CN 113155320B CN 202110272254 A CN202110272254 A CN 202110272254A CN 113155320 B CN113155320 B CN 113155320B
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- calorimeter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K17/00—Measuring quantity of heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K19/00—Testing or calibrating calorimeters
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- Combustion & Propulsion (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a combustion heat measuring method, and relates to the technical field of thermal analysis. The combustion heat measuring method comprises the following specific steps: s1, firstly, weighing a certain amount of substances to be measured by utilizing an electronic balance and a miniature glass container, and then placing the weighed substances to be measured in the miniature glass container for standby; s2, preparing a remote control electronic sprayer, introducing the prepared substance to be tested into a containing bottle of the electronic sprayer, placing the electronic sprayer into an oxygen bomb bottle after preparation, and covering the top of the electronic sprayer by using a heat insulation gasket; s3, after the electronic sprayer is installed, the bottle cap of the oxygen bomb bottle is screwed, and oxygen in the oxygen tank is slowly filled into the oxygen bomb bottle. By adopting the remote control injection mode, when the combustion heat of the liquid substance is measured, the measured value of the combustion heat of the liquid substance in different states can be measured by changing the injection speed and the injection quantity of the liquid substance, so that the overall measurement efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of thermal analysis, in particular to a combustion heat measuring method.
Background
The heat of combustion refers to the heat evolved when a substance is fully combusted with oxygen, and is typically measured by the amount of a unit substance, the unit mass, or the energy evolved when a unit volume of fuel is combusted; the combustion reaction is usually a reaction that hydrocarbon is combusted in oxygen to generate carbon dioxide and water and releases heat, the combustion heat can be measured by an elastic calorimeter, and the combustion heat can be obtained by directly looking up a table to obtain the formation enthalpy (delta fH 0) of the reactant and the product and then subtracting the formation enthalpy; the most basic point is that in organic matter, if the saturation level of the compound is higher (in other words, the number of hydrogen atoms is greater), the corresponding combustion heat is greater, for example, alkane is greater than the combustion heat of alkene and alkyne or aromatic hydrocarbon with the same carbon number, and the combustion heat of fuel can be sometimes expressed as HHV (high heating value), LHV (low heating value), or GHV (total heating value); the low heating value is related to the water discharged in gaseous form, so that the energy used to vaporize the water cannot be considered as heat; the total heating value is related to the water discharged in gaseous form and includes the water present in the fuel prior to combustion. This value is very important for fuels such as wood or coal, as these fuels typically contain a certain amount of water prior to combustion; the high heating value is equivalent to the combustion heat because the enthalpy change in the reaction assumes that the compound remains at normal temperature both before and after combustion, and thus the water produced by this combustion is liquid water.
The measurement experiment of the combustion heat of the substance has important significance for knowing the heat released by the substance during complete combustion, most common methods for measuring the combustion heat of the substance at present adopt an elastic calorimeter for measurement, the existing scheme is relatively simple for measuring the combustion heat of the solid substance, but has great defects for measuring the combustion heat of the liquid substance, and the combustion heat of the liquid substance in different states cannot be accurately measured during the measurement of the combustion heat of the liquid substance, so that certain errors exist in measured values.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a combustion heat measuring method, which solves the problems that the measurement of the combustion heat of liquid substances has larger defects, and the combustion heat of the liquid substances in different states cannot be accurately measured during the measurement of the combustion heat of the liquid substances, so that certain errors exist in the measured values.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: a method for measuring combustion heat, comprising the following steps:
s1, firstly, weighing a certain amount of substances to be measured by utilizing an electronic balance and a miniature glass container, and then placing the weighed substances to be measured in the miniature glass container for standby;
s2, preparing a remote control electronic sprayer, introducing the prepared substance to be tested into a containing bottle of the electronic sprayer, placing the electronic sprayer into an oxygen bomb bottle after preparation, and covering the top of the electronic sprayer by using a heat insulation gasket;
s3, after the electronic sprayer is installed, screwing a bottle cap of the oxygen bomb bottle, and slowly filling oxygen in the oxygen tank into the oxygen bomb bottle;
s4, after oxygen in the oxygen bomb is filled, putting the oxygen bomb into an inner barrel of a calorimeter, injecting a proper amount of purified water into the inner barrel of the calorimeter, covering a sealing cover of the calorimeter, and enabling positive and negative electrodes on the sealing cover to be aligned to positive and negative ignition interfaces on the oxygen bomb respectively;
s5, switching on a power supply of the calorimeter, connecting a data output end of the calorimeter with an input end of a computer host by utilizing a data line, and after the data are in butt joint, switching on a digital display screen of the calorimeter, and starting a calibration test on the calorimeter by parallel aggregate computer software;
s6, after calibration of the calorimeter is completed, inserting a temperature difference probe into the inner barrel of the calorimeter, simultaneously inserting a small stirrer at the other side of the inner barrel of the calorimeter, and after preparation, testing whether the temperature difference probe is electrified and works normally;
s7, controlling the electronic sprayer to work through a remote controller, so that substances to be detected in the electronic sprayer containing bottle are sprayed into the oxygen bomb through the nozzle and fully mixed with oxygen, and simultaneously, switching on positive and negative electrode power supplies on the sealing cover through the calorimeter, so that the positive and negative electrode power supplies are switched on positive and negative ignition interfaces on the oxygen bomb, and the substances to be detected sprayed in the oxygen bomb are ignited through the positive and negative ignition interfaces on the oxygen bomb;
s8, when the substance to be detected sprayed out of the oxygen bomb is fully combusted, a large amount of heat is emitted, the heat is conducted into the inner barrel of the calorimeter through the oxygen bomb, so that purified water in the inner barrel is heated, at the moment, computer software can record the real-time change condition of water temperature in the whole process through the temperature difference probe, and the combustion heat value of the substance to be detected is automatically generated.
Preferably, in the step S1, when the electronic balance is used to weigh the substance to be measured, the electronic balance is used to calibrate zero for the micro glass container, and the inside and outside of the micro glass container must be clean and tidy.
Preferably, in the step S1, the weighed substance to be measured is stored in the micro glass container in a sealed manner by a sealing cover.
Preferably, in the step S2, when the top of the electronic sprayer is covered with a heat insulation gasket, a round hole corresponding to the nozzle of the electronic sprayer needs to be formed in the top of the heat insulation gasket, and the nozzle of the electronic sprayer is aligned to the opening of the oxygen bomb.
Preferably, in the step S6, after the calibration test is performed on the temperature difference probe, a computer is used to record and store the original temperature value of the purified water in the inner barrel of the calorimeter.
Preferably, in the step S7, when the electronic sprayer is controlled to operate by the remote controller, the speed and the ejection amount of the substance to be tested ejected by the electronic sprayer may be controlled by the remote controller.
(III) beneficial effects
The invention provides a combustion heat measuring method. The beneficial effects are as follows:
1. according to the combustion heat measuring method, the combustion heat value of the liquid substance in different states can be measured according to the requirements by adopting jet type combustion, so that the measurement work of the combustion heat values of various liquid substances is convenient, and meanwhile, more accurate measurement values can be obtained through the test of various schemes.
2. According to the combustion heat measuring method, by adopting a remote control injection mode, when the combustion heat of the liquid substance is measured, the injection speed and the injection flow rate of the liquid substance are changed to measure the measurement value of the combustion heat of the liquid substance in different states, so that the overall measuring efficiency is greatly improved.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
the embodiment of the invention provides a combustion heat measuring method, which comprises the following specific steps:
s1, firstly, weighing a certain amount of substances to be measured by utilizing an electronic balance and a miniature glass container, and then placing the weighed substances to be measured in the miniature glass container for standby;
s2, preparing a remote control electronic sprayer, introducing the prepared substance to be tested into a containing bottle of the electronic sprayer, placing the electronic sprayer into an oxygen bomb bottle after preparation, and covering the top of the electronic sprayer by using a heat insulation gasket;
s3, after the electronic sprayer is installed, screwing a bottle cap of the oxygen bomb bottle, and slowly filling oxygen in the oxygen tank into the oxygen bomb bottle;
s4, after oxygen in the oxygen bomb is filled, putting the oxygen bomb into an inner barrel of a calorimeter, injecting a proper amount of purified water into the inner barrel of the calorimeter, covering a sealing cover of the calorimeter, and enabling positive and negative electrodes on the sealing cover to be aligned to positive and negative ignition interfaces on the oxygen bomb respectively;
s5, switching on a power supply of the calorimeter, connecting a data output end of the calorimeter with an input end of a computer host by utilizing a data line, and after the data are in butt joint, switching on a digital display screen of the calorimeter, and starting a calibration test on the calorimeter by parallel aggregate computer software;
s6, after calibration of the calorimeter is completed, inserting a temperature difference probe into the inner barrel of the calorimeter, simultaneously inserting a small stirrer at the other side of the inner barrel of the calorimeter, and after preparation, testing whether the temperature difference probe is electrified and works normally;
s7, controlling the electronic sprayer to work through a remote controller, so that substances to be detected in the electronic sprayer containing bottle are sprayed into the oxygen bomb through the nozzle and fully mixed with oxygen, and simultaneously, switching on positive and negative electrode power supplies on the sealing cover through the calorimeter, so that the positive and negative electrode power supplies are switched on positive and negative ignition interfaces on the oxygen bomb, and the substances to be detected sprayed in the oxygen bomb are ignited through the positive and negative ignition interfaces on the oxygen bomb;
s8, when the substance to be detected sprayed out of the oxygen bomb is fully combusted, a large amount of heat is emitted, the heat is conducted into the inner barrel of the calorimeter through the oxygen bomb, so that purified water in the inner barrel is heated, at the moment, computer software can record the real-time change condition of water temperature in the whole process through the temperature difference probe, and the combustion heat value of the substance to be detected is automatically generated.
In S1, when the electronic balance is used for weighing the substance to be measured, the electronic balance is used for zeroing the miniature glass container, the inside and the outside of the miniature glass container are clean and tidy, and the accuracy of weighing the weight of the substance to be measured can be ensured by zeroing and the inside and the outside of the miniature glass container are clean and tidy, so that the accuracy of a measurement result is ensured.
In S1, when the weighed substance to be measured is contained in the miniature glass container, the weighed substance to be measured needs to be sealed and stored by the sealing cover, and the substance to be measured can be prevented from volatilizing in a preparation stage by sealing and storing the weighed substance to be measured by the sealing cover, so that the accuracy of a measurement result is affected.
S2, when the top of the electronic sprayer is covered by the heat insulation gasket, a round hole corresponding to the nozzle of the electronic sprayer is formed in the top of the heat insulation gasket, the nozzle of the electronic sprayer is aligned to the bottleneck of the oxygen bomb, and the nozzle of the electronic sprayer is aligned to the bottleneck of the oxygen bomb, so that substances to be tested in the electronic sprayer containing bottle can be sprayed into the oxygen bomb through the nozzle to be fully mixed with oxygen, the subsequent full combustion is facilitated, and the heat insulation gasket can play a role in heat insulation protection on the electronic sprayer when the combustion heat of the substances to be tested is measured, so that the electronic sprayer is prevented from being burnt when the substances to be tested are combusted; meanwhile, according to the experimental requirement, the glass container can be directly used for holding and the substance to be measured can be directly ignited through the positive and negative ignition interfaces on the oxygen bomb bottle for measurement.
And S6, after the temperature difference probe is calibrated and tested, the original temperature value of the purified water in the inner barrel of the calorimeter is recorded and stored by a computer.
In S7, when the electronic sprayer is controlled to work through the remote controller, the speed and the ejection amount of the substance to be tested ejected by the electronic sprayer can be controlled through the remote controller, and the measured value of the combustion heat of the liquid substance in different states can be measured by changing the speed and the ejection amount of the substance to be tested ejected by the electronic sprayer.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A method of measuring combustion heat, characterized by: the method comprises the following specific steps:
s1, firstly, weighing a certain amount of substances to be measured by utilizing an electronic balance and a miniature glass container, and then placing the weighed substances to be measured in the miniature glass container for standby;
s2, preparing a remote control electronic sprayer, introducing the prepared substance to be tested into a containing bottle of the electronic sprayer, placing the electronic sprayer into an oxygen bomb bottle after preparation, and covering the top of the electronic sprayer by using a heat insulation gasket;
s3, after the electronic sprayer is installed, screwing a bottle cap of the oxygen bomb bottle, and slowly filling oxygen in the oxygen tank into the oxygen bomb bottle;
s4, after oxygen in the oxygen bomb is filled, putting the oxygen bomb into an inner barrel of a calorimeter, injecting a proper amount of purified water into the inner barrel of the calorimeter, covering a sealing cover of the calorimeter, and enabling positive and negative electrodes on the sealing cover to be aligned to positive and negative ignition interfaces on the oxygen bomb respectively;
s5, switching on a power supply of the calorimeter, connecting a data output end of the calorimeter with an input end of a computer host by utilizing a data line, and after the data are in butt joint, switching on a digital display screen of the calorimeter, and starting a calibration test on the calorimeter by parallel aggregate computer software;
s6, after calibration of the calorimeter is completed, inserting a temperature difference probe into the inner barrel of the calorimeter, simultaneously inserting a small stirrer at the other side of the inner barrel of the calorimeter, and after preparation, testing whether the temperature difference probe is electrified and works normally;
s7, controlling the electronic sprayer to work through a remote controller, so that substances to be detected in the electronic sprayer containing bottle are sprayed into the oxygen bomb through the nozzle and fully mixed with oxygen, and simultaneously, switching on positive and negative electrode power supplies on the sealing cover through the calorimeter, so that the positive and negative electrode power supplies are switched on positive and negative ignition interfaces on the oxygen bomb, and the substances to be detected sprayed in the oxygen bomb are ignited through the positive and negative ignition interfaces on the oxygen bomb;
s8, when the substance to be detected sprayed out of the oxygen bomb is fully combusted, a large amount of heat is emitted, the heat is conducted into the inner barrel of the calorimeter through the oxygen bomb, so that purified water in the inner barrel is heated, at the moment, computer software can record the real-time change condition of water temperature in the whole process through the temperature difference probe, and the combustion heat value of the substance to be detected is automatically generated.
2. A combustion heat measurement method according to claim 1, characterized in that: in the step S1, when the electronic balance is used for weighing the substance to be measured, the electronic balance is used for zeroing the miniature glass container, and the inside and the outside of the miniature glass container are required to be clean and tidy.
3. A combustion heat measurement method according to claim 1, characterized in that: in the step S1, the weighed substance to be measured is stored in a micro glass container in a sealing way by using a sealing cover.
4. A combustion heat measurement method according to claim 1, characterized in that: in the step S2, when the top of the electronic sprayer is covered by the heat insulation gasket, a round hole corresponding to the nozzle of the electronic sprayer is formed in the top of the heat insulation gasket, and the nozzle of the electronic sprayer is aligned to the opening of the oxygen bomb bottle.
5. A combustion heat measurement method according to claim 1, characterized in that: and S6, after the temperature difference probe is calibrated and tested, the original temperature value of the purified water in the inner barrel of the calorimeter is recorded and stored by a computer.
6. A combustion heat measurement method according to claim 1, characterized in that: in the step S7, when the electronic sprayer is controlled to work through the remote controller, the speed and the spraying amount of the substance to be detected sprayed out of the electronic sprayer can be controlled through the remote controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272254.9A CN113155320B (en) | 2021-03-12 | 2021-03-12 | Combustion heat measuring method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110272254.9A CN113155320B (en) | 2021-03-12 | 2021-03-12 | Combustion heat measuring method |
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| CN113155320A CN113155320A (en) | 2021-07-23 |
| CN113155320B true CN113155320B (en) | 2023-09-29 |
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Citations (5)
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|---|---|---|---|---|
| SU1430850A1 (en) * | 1987-03-25 | 1988-10-15 | Ленинградский технологический институт холодильной промышленности | Apparatus for continuous measurement of combustion heat of liquid and gaseous fuels |
| CN102004119A (en) * | 2010-11-04 | 2011-04-06 | 西北工业大学 | Method for measuring combustion heat value of boron powder |
| CN102495101A (en) * | 2011-12-14 | 2012-06-13 | 四川大学 | Device and method for measuring heat sink of high-temperature pyrolysis of heat-absorption type hydrocarbon fuel |
| CN211825798U (en) * | 2020-04-02 | 2020-10-30 | 宜宾中通环保科技有限公司 | Device for measuring liquid combustion heat value |
| CN112146790A (en) * | 2020-10-26 | 2020-12-29 | 黔南民族师范学院 | Teaching aid and measuring method for measuring combustion heat based on pressure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10024147C1 (en) * | 2000-05-18 | 2001-10-04 | Ika Werke Gmbh & Co Kg | Bomb calorimetry using water vessel and outer water jacket, invokes stage of heating in outer jacket, by direct transfer of combustion-heated water from inner vessel |
| US10718511B2 (en) * | 2010-07-02 | 2020-07-21 | Harry R. Taplin, JR. | System for combustion of fuel to provide high efficiency, low pollution energy |
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2021
- 2021-03-12 CN CN202110272254.9A patent/CN113155320B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1430850A1 (en) * | 1987-03-25 | 1988-10-15 | Ленинградский технологический институт холодильной промышленности | Apparatus for continuous measurement of combustion heat of liquid and gaseous fuels |
| CN102004119A (en) * | 2010-11-04 | 2011-04-06 | 西北工业大学 | Method for measuring combustion heat value of boron powder |
| CN102495101A (en) * | 2011-12-14 | 2012-06-13 | 四川大学 | Device and method for measuring heat sink of high-temperature pyrolysis of heat-absorption type hydrocarbon fuel |
| CN211825798U (en) * | 2020-04-02 | 2020-10-30 | 宜宾中通环保科技有限公司 | Device for measuring liquid combustion heat value |
| CN112146790A (en) * | 2020-10-26 | 2020-12-29 | 黔南民族师范学院 | Teaching aid and measuring method for measuring combustion heat based on pressure |
Non-Patent Citations (1)
| Title |
|---|
| 氧弹式量热法测燃烧热实验的改进;李震;《大学化学》(第4期);全文 * |
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