Micro-sample oxygen-enriched combustion device

Abstract

The invention discloses a trace sample oxygen-enriched combustion device which comprises a combustion cavity, an oxygen-enriched combustion chamber, an oxygen-enriched combustion chamber, an oxygen-enriched combustion chamber, an oxygen-enriched combustion chamber, an oxygen-enriched combustion chamber, an oxygen-enriched combustion chamber and an oxygen-enriched combustion chamber, the ignition rod extends into the combustion cavity body; the interior of the crucible is suitable for containing a sample to be burnt, the crucible is arranged at the end, located in the burning cavity, of the ignition rod, an ignition wire is arranged in the crucible, a power supply line is arranged in the ignition rod in a penetrating mode, and the power supply line is electrically connected with the ignition wire; and the oxygen pipeline extends into the combustion cavity and is suitable for blowing oxygen to the crucible. The trace sample oxygen-enriched combustion device has the advantages of being complete in fuel combustion, high in fuel combustion efficiency, high in heat value detection efficiency, good in heat value detection accuracy and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel calorific value detection, in particular to a trace sample oxygen-rich combustion device. BACKGROUND

[0002] Fast and accurate calorific value detection of fuel is the key to subsequent efficient utilization.

[0003] In the related art, the calorific value detection method uses an oxygen bomb calorimeter to determine the calorific value. A known amount of fuel is placed in a sealed container oxygen bomb, and then placed in a bucket sufficient to immerse the oxygen bomb. When measuring, high-pressure pure oxygen is introduced into the oxygen bomb to ignite and completely burn the fuel, and the released heat is transferred to the surrounding water through stirring convection, and the calorific value of the fuel is calculated according to the water temperature rise value obtained by the thermometer and the specific heat capacity of the water. This method needs to ensure that the sample is completely burned and the water temperature reaches a stable value, and the test time is relatively long, generally 15-20 minutes for a single sample. Moreover, when multiple samples are detected in sequence, the entire device system needs to be restored to the initial temperature, which takes a long time and easily affects the accuracy of the detection results, limiting the practical application of the oxygen bomb calorimeter. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a trace sample oxygen-rich combustion device, which has the advantages of complete fuel combustion, high fuel combustion efficiency, high calorific value detection efficiency, and good calorific value detection accuracy.

[0005] To achieve the above-mentioned purpose, according to an embodiment of the present application, a trace sample oxygen-rich combustion device is provided, which comprises: a combustion cavity, wherein a flue gas outlet is arranged on the combustion cavity; an ignition rod, wherein the ignition rod extends into the combustion cavity; a crucible, wherein the crucible is adapted to accommodate a sample to be burned, and the crucible is arranged on one end of the ignition rod located in the combustion cavity, and a ignition wire is arranged in the crucible, a power supply wire is arranged in the ignition rod, and the power supply wire is electrically connected with the ignition wire; and an oxygen pipeline, wherein the oxygen pipeline extends into the combustion cavity and is adapted to blow oxygen to the crucible.

[0006] The trace sample oxygen-rich combustion device according to the embodiment of the present application has the advantages of complete fuel combustion, high fuel combustion efficiency, high calorific value detection efficiency, and good calorific value detection accuracy. In addition, the trace sample oxygen-rich combustion device according to the above-mentioned embodiment of the present application can also have the following additional technical features: According to an embodiment of the present application, the oxygen pipeline is arranged directly above the crucible, and the lower end of the oxygen pipeline extends into the crucible.

[0007] According to one embodiment of the present application, the bottom wall of the crucible is an arc surface which is convex upward from the center to the edge.

[0008] According to one embodiment of the present application, the combustion cavity comprises a main body and an end cover which is detachably mounted on the main body, and the ignition rod is arranged on the end cover and penetrates through the end cover.

[0009] According to one embodiment of the present application, a fireproof seal is arranged between the end cover and the main body.

[0010] According to one embodiment of the present application, a cooling gas inlet is arranged on the end cover and communicates with a cooling gas source.

[0011] According to one embodiment of the present application, the combustion cavity comprises a combustion section in which the crucible is arranged, a smoke guide section in which the flue gas outlet is formed, and a tapered section which is connected with the combustion section and the smoke guide section respectively and whose inner diameter gradually decreases from the combustion section to the smoke guide section.

[0012] According to one embodiment of the present application, two ignition electrodes are arranged on one end of the ignition rod which is located in the combustion cavity, two crucible electrodes are arranged on the bottom wall of the crucible, the ignition wire is connected with the two crucible electrodes respectively, and the two crucible electrodes penetrate through the bottom wall of the crucible and are connected with the two ignition electrodes respectively.

[0013] According to one embodiment of the present application, the ignition rod is a corundum tube, two wire-through holes which extend in the axial direction are arranged on the ignition rod, and two power supply wires penetrate through the two wire-through holes respectively and are connected with the two ignition electrodes respectively.

[0014] According to one embodiment of the present application, the oxygen pipeline has a gas supply flow rate of 500-1000 milliliter per minute.

[0015] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which: Figure 1 is a sectional view of a device for oxygen-enriched combustion of a micro sample according to an embodiment of the present application.

[0017] Figure 2 is a sectional view of a device for oxygen-enriched combustion of a micro sample according to an embodiment of the present application.

[0018] Reference signs: trace sample oxygen-enriched combustion device 1, combustion cavity 10, flue gas outlet 11, main body 12, combustion section 121, flue gas guiding section 122, tapered section 123, end cover 13, cooling gas inlet 14, ignition rod 20, power supply wire 21, ignition electrode 22, crucible 30, ignition wire 31, crucible electrode 32, oxygen pipe 40. DETAILED DESCRIPTION

[0019] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0020] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified and limited, the term "a plurality of" means two or more. In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] The trace sample oxygen-enriched combustion device 1 according to the embodiments of the present application is described below with reference to the drawings.

[0022] As shown in Figure 1 and Figure 2 The trace sample oxygen-enriched combustion device 1 according to the embodiments of the present application includes a combustion cavity 10, an ignition rod 20, a crucible 30, and an oxygen pipe 40.

[0023] The combustion cavity 10 is provided with a flue gas outlet 11. The ignition rod 20 extends into the combustion cavity 10. The crucible 30 is adapted to accommodate the sample to be combusted and is arranged on one end of the ignition rod 20 located in the combustion cavity 10. The ignition wire 31 is arranged in the crucible 30. The power supply wire 21 is arranged in the ignition rod 20 and is electrically connected to the ignition wire 31. The oxygen pipeline 40 extends into the combustion cavity 10 and is adapted to blow oxygen to the crucible 30.

[0024] Specifically, the sample to be combusted is solid fuel, such as coal, biomass, solid waste, etc.

[0025] The sample to be combusted is laid in the crucible 30. Pure oxygen is delivered into the combustion cavity 10 by the oxygen pipeline 40 and blown to the crucible 30. The ignition wire 31 is powered by the power supply wire 21 to heat up and ignite the sample to be combusted in the crucible 30. The generated flue gas is discharged through the flue gas outlet 11.

[0026] When the trace sample oxygen-enriched combustion device 1 is used for fuel calorific value detection, the flue gas discharged from the flue gas outlet 11 is collected and the temperature is measured to calculate the calorific value of the sample to be combusted, thereby realizing the detection of the calorific value of the sample to be combusted.

[0027] The amount of the sample to be combusted for each fuel calorific value detection is 0.5g-1g. The time for each fuel calorific value detection is less than 5 minutes.

[0028] According to the trace sample oxygen-enriched combustion device 1 of the embodiment of the present application, the oxygen pipeline 40 is arranged to supply oxygen into the combustion cavity 10 and blow the oxygen to the crucible 30. The oxygen is used to purge other gases in the combustion cavity 10 to make the combustion cavity 10 an oxygen environment, thereby providing sufficient oxygen for the combustion of the sample to be combusted. The trace sample can be combusted efficiently and completely. The incomplete combustion or slow combustion does not affect the accuracy of the calorific value detection, thereby improving the accuracy and reliability of the calorific value detection result and improving the calorific value detection efficiency. Moreover, the fuel consumption is small and the combustion time is short, which facilitates the rapid cooling of the combustion cavity 10, reduces the waiting time for cooling between multiple detections, and further improves the detection efficiency.

[0029] Moreover, the flue gas outlet 11 is arranged to collect and measure the combustion flue gas through the flue gas outlet 11, thereby facilitating the detection of the fuel calorific value and the collection and centralized treatment of the flue gas.

[0030] In addition, the ignition rod 20 is arranged. The power supply wire 21 is arranged in the ignition rod 20. The crucible 30 is arranged on the ignition rod 20. The ignition wire 31 is arranged in the crucible 30. The power supply wire 21 is electrically connected to the ignition wire 31. The ignition time of the sample to be combusted in the crucible 30 can be controlled, thereby facilitating the control of the combustion process and the progress of the calorific value detection.

[0031] Therefore, the oxygen-enriched combustion device 1 for trace samples can achieve efficient and complete combustion with a small amount of sample to be burned, so as to ensure the accuracy of calorific value detection. This makes the oxygen-enriched combustion device 1 suitable for the calorific value detection of trace samples. Compared with the method of using an oxygen bomb calorimeter to detect the calorific value of fuel in related technologies, it is convenient to conduct calorific value detection of trace samples, reduce fuel consumption, improve detection efficiency, and improve the accuracy of detection results.

[0032] Therefore, the micro-sample oxygen-enriched combustion device 1 according to the embodiments of the present invention has the advantages of complete fuel combustion, high fuel combustion efficiency, high calorific value detection efficiency, and good calorific value detection accuracy.

[0033] The following description, with reference to the accompanying drawings, describes a micro-sample oxygen-enriched combustion device 1 according to a specific embodiment of the present invention.

[0034] In some specific embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the micro-sample oxygen-enriched combustion device 1 according to an embodiment of the present invention includes a combustion chamber 10, an ignition rod 20, a crucible 30, and an oxygen pipeline 40.

[0035] Advantageously, such as Figure 1 and Figure 2 As shown, the oxygen pipe 40 is positioned directly above the crucible 30, with its lower end extending into the crucible 30 (the vertical direction is indicated by the arrows in the figure). This allows oxygen to be directly guided into the crucible 30 through the oxygen pipe 40, enabling the oxygen to directly purge the sample to be burned within the crucible 30. This ensures a rapid formation of a pure oxygen environment around the sample and within the crucible 30, improving the combustion efficiency of the sample and promoting complete combustion.

[0036] More advantageously, such as Figure 1 and Figure 2 As shown, the bottom wall of the crucible 30 is an arc-shaped surface that bulges upward from the center to the edge. In this way, after the sample to be burned is ignited by the ignition wire 31, under the action of oxygen purging and the arc-shaped surface, the sample to be burned will burn out in a way that spreads from the center to the surrounding area, which can avoid the ignition wire 31 being burned at high temperature for a long time and extend the service life of the ignition wire 31.

[0037] Specifically, such as Figure 1 and Figure 2As shown, the combustion chamber 10 includes a main body 12 and an end cap 13. The end cap 13 is detachably mounted on the main body 12, and the ignition rod 20 is located on and passes through the end cap 13. This allows the ignition rod 20 and the crucible 30 to be removed from the main body 12 together after the end cap 13 is removed. This not only facilitates the replacement of the sample to be burned in the crucible 30, but also facilitates heat dissipation from the crucible 30, allowing it to cool rapidly for the next combustion. After the end cap 13 is installed, it can seal the main body 12 to prevent flue gas leakage and ensure that the flue gas is discharged through the flue gas outlet 11, thereby improving the accuracy of calorific value detection.

[0038] More specifically, such as Figure 1 and Figure 2 As shown, a fireproof seal is provided between the end cap 13 and the main body 12. Specifically, the fireproof seal can be a metal seal or a graphite gasket. This not only improves the sealing performance between the end cap 13 and the main body 12, but also prevents the seal from catching fire.

[0039] Advantageously, such as Figure 1 and Figure 2 As shown, the end cap 13 is provided with a cooling gas inlet 14, which is connected to a cooling gas source. Those skilled in the art will understand that the flow rate of the cooling gas can be adjusted according to actual needs, and the flow rate only needs to ensure that the gas pressure outside the combustion chamber 10 is greater than the gas pressure inside the combustion chamber 10. This ensures that the flue gas is discharged through the flue gas outlet 11, preventing the flue gas from remaining inside the combustion chamber 10 and causing heat loss through thermal radiation, which would affect the accuracy of the detection. Furthermore, the cooling gas can be used to cool the ignition rod 20.

[0040] Specifically, the end cap 13 and the main body 12 are detachably fastened together. This facilitates the assembly and disassembly of the end cap 13, improves the efficiency of replacing the sample to be burned inside the crucible 30, and increases the efficiency of calorific value detection.

[0041] Furthermore, such as Figure 1 and Figure 2 As shown, the combustion chamber 10 includes a combustion section 121, a smoke guiding section 122, and a conical section 123. A crucible 30 is disposed within the combustion section 121. A flue gas outlet 11 is formed on the smoke guiding section 122. The conical section 123 is connected to both the combustion section 121 and the smoke guiding section 122, and its inner diameter gradually decreases from the combustion section 121 to the smoke guiding section 122. Specifically, the main body 12 includes the combustion section 121, the smoke guiding section 122, and the conical section 123. An end cap 13 is detachably installed at one end of the combustion section 121, and the conical section 123 is located at the other end of the combustion section 121. This allows the flue gas generated within the combustion section 121 to be collected and converged by the conical section 123, and then guided by the smoke guiding section 122 before being discharged through the flue gas outlet 11, facilitating flue gas temperature detection and collection and centralized treatment of the flue gas.

[0042] Figure 1 and Figure 2 A micro-sample oxygen-enriched combustion device 1 according to some examples of the present invention is shown. For example... Figure 1 and Figure 2 As shown, the ignition rod 20 has two ignition electrodes 22 at one end inside the combustion chamber 10, and two crucible electrodes 32 are provided on the bottom wall of the crucible 30. The ignition wire 31 is connected to the two crucible electrodes 32 respectively, and the two crucible electrodes 32 pass through the bottom wall of the crucible 30 and are connected to the two ignition electrodes 22 respectively. This facilitates the supply of power to the ignition wire 31, thus facilitating the ignition of the sample to be burned.

[0043] Specifically, the ignition rod 20 is a corundum tube, and it has two axially extending wire holes. There are two power supply lines 21, which pass through the two wire holes and are connected to the two ignition electrodes 22 respectively. This improves the fire resistance of the ignition rod 20 and protects the power supply lines 21.

[0044] Optionally, the oxygen supply flow rate of oxygen pipeline 40 is 500-1000 ml per minute. This facilitates control of the oxygen supply rate, avoiding excessive flow rate from affecting the combustion process and detection accuracy, while also ensuring complete combustion and improving combustion efficiency.

[0045] Specifically, the connection between the ignition rod 20 and the end cap 13 can be sealed to prevent smoke leakage.

[0046] A corrugated tube may be fitted over the ignition rod 20 to further prevent smoke leakage.

[0047] Other configurations and operations of the micro-sample oxygen-enriched combustion device 1 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A micro-sample oxygen-enriched combustion device, characterized by, The utility model relates to a combustion device, comprising: a combustion cavity provided with a flue gas outlet; an ignition rod extending into the combustion cavity; a crucible adapted to contain a sample to be combusted, the crucible being provided on one end of the ignition rod located in the combustion cavity, the crucible being provided with an ignition wire, and a power supply wire being provided in the ignition rod and electrically connected to the ignition wire; an oxygen pipe extending into the combustion cavity and adapted to blow oxygen towards the crucible.

2. The micro-sample oxygen-rich combustion apparatus according to claim 1, characterized by, The oxygen pipe is provided directly above the crucible, and the lower end of the oxygen pipe extends into the crucible.

3. The micro-sample oxygen-rich combustion apparatus according to claim 1, wherein The bottom wall of the crucible is an arc surface that is convex upwards from the center to the periphery.

4. The micro-sample oxygen-rich combustion apparatus according to claim 1, wherein The combustion cavity comprises a main body and an end cover that is detachably mounted on the main body, the ignition rod being provided on the end cover and extending through the end cover.

5. The micro-sample oxygen-enriched combustion device according to claim 4, wherein A fireproof seal is provided between the end cover and the main body.

6. The micro-sample oxygen-enriched combustion apparatus according to claim 4, wherein The end cover is provided with a cooling gas inlet that is in communication with a cooling gas source.

7. The micro-sample oxygen-rich combustion apparatus according to claim 1, wherein The combustion cavity comprises: a combustion section in which the crucible is provided; a flue section in which the flue gas outlet is formed; a tapered section connected to the combustion section and the flue section and having a gradually decreasing inner diameter from the combustion section to the flue section.

8. The micro-sample oxygen-enriched combustion apparatus according to claim 1, wherein One end of the ignition rod located in the combustion cavity is provided with two ignition electrodes, the bottom wall of the crucible is provided with two crucible electrodes, the ignition wire is connected to the two crucible electrodes, and the two crucible electrodes extend through the bottom wall of the crucible and are connected to the two ignition electrodes.

9. The micro-sample oxygen-enriched combustion apparatus according to claim 8, wherein, The ignition rod is a corundum tube, the ignition rod is provided with two wire holes extending in the axial direction, and the power supply wire is two, the two power supply wires extend through the two wire holes and are connected to the two ignition electrodes, respectively.

10. The micro-sample oxygen-enriched combustion apparatus according to claim 1, wherein The oxygen pipe has a gas supply flow rate of 500-1000 milliliters per minute.

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