Device for measuring moisture in powder sample

Abstract

The utility model discloses a device for measuring moisture in a powder sample. The device comprises a heating unit, a reaction unit, a balance cavity and a detection unit, the heating unit is used as a platform structure, is arranged at the bottom of the reaction unit and is in contact with the reaction unit; the reaction unit is movably arranged on the heating unit and is used for bearing a sample and carrying out contact heating and drying on the sample through the heating unit; the balance cavity is arranged above the reaction unit, forms a closed space with the reaction unit, and is used for carrying out heating reaction on a sample; the balance cavity is further connected with a drying hole which is used for introducing dry gas into the balance cavity. The detection unit is arranged in the balance cavity and is used for detecting the moisture of the gas in the balance cavity. Through a direct contact heating mode, the sample containing disc and the heating unit rapidly conduct heat, so that the analysis speed is high, and the efficiency is high during online measurement; a three-dimensional drying system can be formed, and the ventilation rate is high.

Description

Technical Field

[0001] This application relates to the field of material content detection technology, and more specifically, to an apparatus for determining the moisture content in a powder sample. Background Technology

[0002] In the field of coal quality analysis, moisture has a significant impact on various indicators. However, when a sample is transferred under different environments, the moisture content in the sample will change due to diffusion equilibrium with the environment. Therefore, rapid moisture determination has important practical significance.

[0003] The commonly used measuring equipment for classic powder samples is the oven drying method and the automated instrument method, as well as thermogravimetric analysis. Both methods can be further divided into two-step and one-step methods, with drying completed in a nitrogen or air stream. The two-step method involves first drying the sample (mainly coal samples in the standard) at 40℃ to remove external moisture, and then drying it again at 107℃ to constant weight to remove internal moisture; the total water content equals the sum of external and internal water. The one-step method directly dries the sample at 107℃ to constant weight to obtain the total water content. However, according to standards, both the oven drying method and the automated instrument method require more than one hour of drying time, which is inefficient and does not meet the requirements for rapid detection.

[0004] Therefore, there is an urgent need for a device that can quickly determine the moisture content in powder samples, enabling rapid detection of powder samples, especially in the field of coal quality analysis, to achieve efficient and rapid detection of coal moisture content. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an apparatus for determining the moisture content in powder samples. By rapidly heating the sample with a heater and conducting the heat to the sample, a three-dimensional drying system is formed on the surface of the powder sample, which improves the analysis speed. Furthermore, online measurement is performed using a detection sensor, resulting in high efficiency.

[0006] This application provides an apparatus for determining the moisture content in a powder sample, the specific technical solution of which is as follows: a heating unit, a reaction unit, a balance chamber, and a detection unit;

[0007] The heating unit, serving as a platform structure, is positioned at the bottom of the reaction unit and is in contact with the reaction unit.

[0008] The reaction unit is movably mounted on the heating unit to support the sample and to heat and dry the sample through the heating unit.

[0009] The balance chamber is disposed above the reaction unit and forms a closed space with the reaction unit for heating and reacting the sample.

[0010] The balancing chamber is also connected to a drying hole for introducing drying gas into the balancing chamber.

[0011] The detection unit is located inside the balance chamber and performs moisture detection on the gas inside the balance chamber.

[0012] Preferably, the reaction unit specifically includes: a reactor, a tray, and a cylinder injector;

[0013] The tray can move horizontally under the pushing action of the cylinder sampler;

[0014] The tray is moved above the reactor and outside the balance chamber to allow samples to enter and exit.

[0015] Preferably, the tray structure is a porous structure.

[0016] Preferably, the reactor is made of a metal material with good thermal conductivity and corrosion resistance.

[0017] Preferably, the outer surface of the balancing cavity is also covered with a heat insulation layer.

[0018] Preferably, the detection unit is a humidity sensor and an infrared detector, used to detect the humidity and infrared activity of the gas in the equilibrium chamber.

[0019] Preferably, the detection unit is located at the top center of the balance cavity.

[0020] Preferably, the drying hole in the balancing chamber is specifically located at the bottom of the balancing chamber.

[0021] Preferably, the specific type of drying gas introduced into the balance chamber through the drying orifice is either dry air or nitrogen.

[0022] Preferably, the heating unit heats the lower surface of the reaction unit uniformly.

[0023] The device for determining the moisture content in powder samples provided by this invention uses direct contact heating, allowing for rapid heat conduction between the sample tray and the heating unit, resulting in fast moisture analysis and high efficiency during online measurement. Compared to traditional ovens, this device can form a three-dimensional drying system on the surface of the powder sample, with a high air exchange rate. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A cross-sectional front view schematic diagram of the apparatus for determining moisture in powder samples provided in an embodiment of this utility model;

[0026] Figure 2 This is a cross-sectional side view of the device for determining moisture in powder samples provided in an embodiment of the present invention.

[0027] Reference numerals: 1. Heating unit; 2. Balance chamber; 3. Insulation layer; 4. Humidity sensor; 5. Tray; 6. Cylinder injector; 7. Drying port; 8. Infrared sensor. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0032] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0033] This utility model is written in a progressive manner in this specific embodiment.

[0034] This utility model provides an apparatus for determining the moisture content in a powder sample, which mainly includes: a heating unit, a reaction unit, a balance chamber, and a detection unit;

[0035] like Figure 1 and Figure 2 As shown, in this embodiment, the heating unit serves as the mounting platform for the entire device for measuring the moisture content in the anti-wear sample, and is located at the bottom of the reaction unit, making contact with the lower surface of the reaction unit.

[0036] The reaction unit is movably mounted on the heating unit to support the sample. The lower surface of the reaction unit contacts the heating unit, and the sample is dried by heat conduction.

[0037] The balance chamber is positioned above the reaction unit, forming a three-dimensional drying system with the reaction unit in a closed space, which is used to heat and react the sample, thereby accelerating the drying speed of the sample.

[0038] The equilibrium chamber is also equipped with a drying hole and a detection unit. The drying gas introduced into the equilibrium chamber is mixed under pressure. The detection unit collects the average humidity and converts it into the average concentration of water vapor in the equilibrium chamber, thereby quantifying the moisture content.

[0039] Preferably, the specific structure of the reaction unit in this embodiment is further defined, such as... Figure 1 and Figure 2 As shown, in this embodiment, the reaction unit specifically includes: a reactor, a tray, and a cylinder sampler;

[0040] The tray can move horizontally under the pushing action of the cylinder sampler;

[0041] The tray can be moved horizontally above the reactor and outside the balance chamber to facilitate sample loading and unloading and improve the continuous detection speed of samples.

[0042] Furthermore, in this embodiment, the specific structure of the tray is further defined. In order to improve the drying speed of the sample, the tray has a porous structure, which improves the air convection performance and has the characteristics of high moisture drying efficiency.

[0043] Furthermore, in this embodiment, the specific material of the reactor is further defined. In order to improve the thermal conductivity and durability of the reactor, the material of the reactor is a metal material with good thermal conductivity and corrosion resistance. Specifically, in this embodiment, the reactor is made of aluminum alloy or copper alloy.

[0044] Preferably, in order to better measure the water vapor in the balancing chamber and prevent its liquefaction, in this embodiment, as follows: Figure 1 and Figure 2 As shown, the outer surface of the balance chamber is also covered with a heat insulation layer. In this embodiment, the heat insulation layer is specifically heat insulation cotton material, which is used to insulate the air passage and prevent water vapor condensation.

[0045] Furthermore, in order to accurately measure the water vapor in the equilibrium chamber to determine the moisture content in the sample, in this embodiment, the detection unit is specifically a humidity sensor and an infrared detector, using humidity measurement and infrared methods to detect the moisture in the gas in the equilibrium chamber.

[0046] In the humidity method, the water vapor precipitated during drying is collected in the equilibrium chamber and mixed under the pressure of the medium gas introduced through the drying hole. The humidity sensor collects the average humidity and converts it into the average concentration of water vapor in the equilibrium chamber, thereby quantifying the moisture content.

[0047] When using an infrared detector to measure water vapor, the insulation layer is used to keep the gas path warm to prevent water vapor condensation. The infrared detector has a built-in pressure acquisition and flow stabilization device, and the moisture content of the precipitated water vapor is measured in a flowing state.

[0048] Furthermore, to ensure accurate measurement of water vapor within the equilibrium chamber, the specific installation positions of the humidity sensor and the infrared detector in this embodiment are further determined, such as... Figure 1 and Figure 2As shown, in this embodiment, the detection unit is specifically located at the top center of the balance cavity. More specifically, the humidity sensor is located inside the balance cavity, and the infrared detector is located at the top of the balance cavity.

[0049] Preferably, to better ensure that the medium gas introduced into the balance chamber is mixed evenly under pressure, such as... Figure 2 As shown in this embodiment, the drying hole in the balance chamber is specifically located at the bottom of the balance chamber, and the bottom-up ventilation can make the water vapor mix more evenly.

[0050] Furthermore, in this embodiment, the specific type of drying gas in the drying hole is further defined. In this embodiment, in order to better dry the sample, the gas introduced is specifically air or nitrogen; specifically, for bituminous coal or anthracite, air is introduced for drying; for lignite, nitrogen is introduced for drying.

[0051] Preferably, in order to make the heating of the sample more uniform and efficient, the heating unit in this embodiment is further defined. In this embodiment, the heating unit uniformly heats the lower surface of the reaction unit so that the sample can be heated evenly to evaporate the water.

[0052] In addition, this application also provides a method for moisture detection, the specific steps of which are as follows:

[0053] 1. Place the sample on the reaction unit and then enter the equilibrium chamber;

[0054] 2. The lower surface of the reaction unit is heated by the heating unit to dry the sample;

[0055] 3. Simultaneously, dry gas is introduced into the balance chamber through the drying hole and mixed evenly within the balance chamber;

[0056] 4. The moisture content of the gas in the balance chamber is detected by a detection unit installed in the balance chamber.

[0057] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for determining moisture in a powder sample, characterized in that, Include: Heating unit, reaction unit, balance cavity, detection unit; The heating unit is arranged as a platform structure at the bottom of the reaction unit and in contact with the reaction unit; The reaction unit is movably arranged on the heating unit to carry the sample and heat and dry the sample by the heating unit; The balance cavity is arranged above the reaction unit to form a sealed space with the reaction unit for heating reaction of the sample; The balance cavity is also connected with a drying hole for connecting dry gas into the balance cavity; The detection unit is arranged in the balance cavity to detect the moisture of the gas in the balance cavity.

2. The apparatus for determining moisture in a powder sample according to claim 1, wherein, The reaction unit specifically includes: reactor, tray and cylinder sample injector; The tray can move in the horizontal direction under the driving of the cylinder sample injector; Realize the movement of the tray above the reactor and outside the balance cavity to realize the sample in and out.

3. The apparatus for determining moisture in a powder sample according to claim 2, wherein, The tray structure is a porous structure.

4. The apparatus for determining moisture in a powder sample of claim 3, wherein, The reactor is made of metal material with good thermal conductivity and corrosion resistance.

5. The apparatus for determining moisture in a powder sample of claim 1, wherein, The outer surface of the balance cavity is also covered with a heat preservation layer.

6. The apparatus for determining moisture in a powder sample of claim 5, wherein, The detection unit specifically is a humidity sensor and an infrared detector to detect the humidity and infrared of the water in the gas in the balance cavity.

7. The apparatus for determining moisture in a powder sample according to claim 6, wherein, The detection unit is specifically arranged at the top center of the balance cavity.

8. The apparatus for determining moisture in a powder sample of claim 1, wherein, The drying hole in the balance cavity is specifically arranged at the bottom of the balance cavity.

9. The apparatus for determining moisture in a powder sample of claim 8, wherein, The specific type of dry gas introduced into the balance cavity through the drying hole is dry air or nitrogen.

10. The apparatus for determining moisture in a powder sample according to any one of claims 1 to 9, characterized in that, The heating unit uniformly heats the lower surface of the reaction unit.

Images