A gas dehumidification device and method for a drying oven for coal moisture detection

Abstract

The application discloses a gas dehumidifying device and method for a drying box for coal moisture detection, which comprises a circulating gas dust filtering unit, a regenerated gas heating unit, a regenerated gas preheating unit, a regenerated gas air draft unit, a circulating gas air draft unit connected with the drying box, and a rotary dehumidifying unit; the circulating gas air draft unit is connected with the rotary dehumidifying unit; the regenerated gas air draft unit is connected with the regenerated gas preheating unit; the regenerated gas preheating unit is connected with the regenerated gas heating unit; the regenerated gas heating unit is connected with the rotary dehumidifying unit; and the rotary dehumidifying unit is connected with the regenerated gas preheating unit. After the gas dehumidifying device is connected with the drying box, circulating air in the drying box can be continuously led out, the moisture in the air flow is removed through the rotary dehumidifying unit, and then the air flow is sent into the drying box again, so that the air humidity in the drying box is reduced, the test period of sample moisture determination is shortened, and the gas dehumidifying device is suitable for being used in cooperation with drying boxes of different types.

Description

Technical Field

[0001] This invention belongs to the field of new energy and energy-saving technology, specifically relating to a gas dehumidification device and method for a drying box used for coal moisture detection. Background Technology

[0002] Drying ovens are widely used for determining the moisture content (total moisture and air-dried basis moisture) in coal. Before testing, the drying oven is heated to 105-110℃, with continuous forced-air circulation inside. The sample is then placed inside the oven; at this temperature, the moisture in the sample will gradually precipitate into the air inside the oven until it is completely dry. This process requires a relatively long time to ensure complete precipitation. According to current relevant standards, GB / T211-2017, Method B2 (air drying), for the determination of total moisture in coal, specifies that bituminous coal should be dried for 2 hours and anthracite for 3 hours; GB / T212-2008, Method B (air drying), for industrial analysis of coal, specifies that bituminous coal should be dried for 1 hour and anthracite for 1.5 hours.

[0003] During the moisture determination test, the air inside the drying oven is always in internal circulation. Moisture in the sample gradually enters the circulating air over time. When there are many samples placed in the drying oven with high moisture content, the moisture content in the circulating air increases during the test, leading to a higher partial pressure of moisture in the circulating air. This inevitably slows down the evaporation rate of moisture in the sample, resulting in a longer moisture determination test time. Summary of the Invention

[0004] To address the problem of increasing humidity in the circulating air inside the drying chamber during moisture determination, resulting in long test cycles, this invention aims to provide a gas dehumidification device for a drying chamber used for coal moisture detection. This device uses an induced draft fan to draw air out of the drying chamber, then employs a rotary dehumidifier to remove moisture from the airflow, and finally returns the dried airflow to the drying chamber. This reduces the moisture content of the circulating airflow without altering its temperature, allowing moisture in the sample to evaporate into the air more quickly and shortening the moisture determination test time.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A gas dehumidification device for a drying box for coal moisture detection includes a circulating gas dust filtration unit, a regenerated gas heating unit, a regenerated gas preheating unit, a regenerated gas exhaust unit, and a circulating gas exhaust unit and a rotary dehumidification unit connected to the drying box. The circulating gas exhaust unit is connected to the rotary dehumidification unit, the regenerated gas exhaust unit is connected to the regenerated gas preheating unit, the regenerated gas preheating unit is connected to the regenerated gas heating unit, the regenerated gas heating unit is connected to the rotary dehumidification unit, and the rotary dehumidification unit is connected to the circulating gas dust filtration unit.

[0006] Furthermore, it also includes a chassis, on which the circulating gas exhaust unit and the circulating gas dust filter unit are mounted.

[0007] Furthermore, it also includes a controller, a circulating gas induced draft unit, a regenerated gas induced draft unit, a regenerated gas heating unit, and a rotary dehumidification unit connected to the controller.

[0008] Furthermore, the circulating gas induced draft unit includes a circulating gas induced draft fan housing, a circulating gas induced draft motor, a circulating gas induced draft inlet flange, a circulating gas induced draft outlet flange, and a circulating gas induced draft support. The circulating gas induced draft fan housing is installed on the circulating gas induced draft fan support. A circulating gas induced draft fan inlet flange is installed at one end of the circulating gas induced draft fan housing. A circulating gas induced draft fan unit gas inlet is installed on the circulating gas induced draft fan inlet flange. A circulating gas induced draft fan motor is installed at the other end of the circulating gas induced draft fan housing. A circulating gas induced draft fan outlet flange is installed on the side wall of the circulating gas induced draft fan housing. A circulating gas induced draft fan unit gas outlet is installed on the circulating gas induced draft fan outlet flange.

[0009] Furthermore, the regenerated gas induced draft unit includes a regenerated gas induced draft fan housing, a regenerated gas induced draft motor, a regenerated gas induced draft inlet flange, a regenerated gas induced draft outlet flange, and a regenerated gas induced draft support. The regenerated gas induced draft support is equipped with a regenerated gas induced draft fan casing. One end of the regenerated gas induced draft fan casing is equipped with a regenerated gas induced draft inlet flange, and the regenerated gas induced draft unit gas inlet is set on the regenerated gas induced draft inlet flange. The other end of the regenerated gas induced draft fan casing is equipped with a regenerated gas induced draft fan motor. A regenerated gas induced draft fan casing side wall is equipped with a regenerated gas induced draft outlet flange, and the regenerated gas induced draft unit gas outlet is set on the regenerated gas induced draft outlet flange.

[0010] Furthermore, the rotary dehumidification unit includes a rotary motor, a lower rotary cover, an upper rotary cover, and a rotary support column; The system includes a rotor motor inside the lower rotor cover, a regeneration gas outlet for the rotor dehumidification unit on one side wall, and a circulating gas outlet for the rotor dehumidification unit on the other side wall. Several rotor support columns are located on the top of the lower rotor cover, with a support plate on top of each column. The rotor motor is mounted on the support plate. An upper rotor cover is located on top of the support columns, and a dehumidification rotor is positioned between the upper and lower rotor covers. The rotor motor is connected to a motor gear, which is connected to a drive belt. The drive belt is connected to the dehumidification rotor. A circulating gas inlet for the rotor dehumidification unit is located at one end of the lower rotor cover, and a regeneration gas inlet for the rotor dehumidification unit is located at the other end. Temperature and humidity sensors are installed on the top surfaces of both the upper and lower rotor covers.

[0011] Furthermore, the circulating gas dust filtration unit includes a filter box and a filter element; The filter box contains a filter element, and a gas inlet for the circulating gas dust filtration unit is located on one side wall of the filter box, while a gas outlet for the circulating gas dust filtration unit is located on the other side wall.

[0012] Furthermore, the regenerated gas heating unit includes an upper heating rod seat, a lower heating rod seat, U-shaped heating rods, a main heating chamber, and support rods. The main heating chamber has a regenerated gas heating unit inlet on one side and an outlet on the other. The lower heating rod seat is located at the top of the main heating chamber, and several support rods are mounted on it. The upper heating rod seat is located on top of the support rods. The upper surface of the upper heating rod seat has a groove with several through holes at the bottom. The lower surface of the lower heating rod seat also has a groove with several through holes at the top. Support rods are positioned within the through holes of the upper and lower heating rod seats. Several U-shaped heating rods are positioned within the groove of the upper heating rod seat.

[0013] Furthermore, the regenerated gas preheating unit includes a regenerated gas preheating unit support, a vertical bend pipe for the regenerated gas preheating unit installed on the top of the support, an exhaust gas inlet for the regenerated gas preheating unit installed on the side wall of the vertical bend pipe, a connecting pipe installed on the top of the vertical bend pipe, an air inlet for the regenerated gas preheating unit installed on the side wall of the connecting pipe, a regenerated gas preheating unit shell installed on the top of the connecting pipe, an air outlet for the regenerated gas preheating unit installed on the side wall of the shell, a heat pipe for the regenerated gas preheating unit installed inside the air outlet, an exhaust pipe for the regenerated gas preheating unit installed on the top of the shell, and an exhaust gas outlet for the regenerated gas preheating unit installed on the top of the exhaust pipe.

[0014] A method for dehumidifying gas in a drying oven for coal moisture detection includes the following steps: Moisture in the coal moisture test sample evaporates into the air in the drying chamber. The hot and humid air in the drying chamber enters the rotary dehumidification unit through the circulating gas induced draft unit. The rotary dehumidification unit adsorbs the moisture in the circulating air and dries the air before it enters the drying chamber. The regenerated air is driven by the regenerated gas induced draft unit, preheated by the regenerated gas preheating unit, and then enters the regenerated gas heating unit. After being heated, it generates high-temperature regenerated gas, which then enters the rotary dehumidification unit. The moisture adsorbed in the circulating gas in the rotary dehumidification unit is desorbed and enters the regenerated gas preheating unit with the regenerated gas. After exchanging heat with the regenerated air, it is discharged.

[0015] Furthermore, the chassis includes a chassis base plate, a chassis top cover plate, and chassis side screws. The chassis top cover plate is installed on the chassis base plate, and the chassis base plate and chassis top cover plate form a cavity.

[0016] Furthermore, the chassis base plate includes a first base plate, a second base plate, and a third base plate connected together. The second base plate is horizontally positioned, while the first and third base plates are vertically positioned at opposite ends of the second base plate. The first base plate has a chassis recirculated gas inlet and a chassis recirculated gas outlet, and the third base plate has a display opening. The chassis top cover includes a first top cover, a second top cover, and a third top cover. The second top cover is horizontally positioned, while the first and third top covers are positioned at opposite ends of the second top cover. The second top cover has a chassis exhaust gas outlet, and an exhaust gas outlet mesh is installed at the exhaust gas outlet. The first base plate is connected to the first top cover and the third top cover by chassis side screws, and the second base plate is also connected to the first top cover and the third top cover by chassis side screws.

[0017] Compared with the prior art, the present invention has the following technical effects: This invention provides a gas dehumidification device for a drying oven used in coal moisture testing. When connected to the drying oven, it continuously draws out circulating air from the oven, removes moisture from the airflow via a rotary dehumidification unit, and then reintroduces it into the drying oven, reducing the humidity inside and thus shortening the test cycle for sample moisture determination. This invention is simple and effective in design, compact in structure, and functionally independent. Through pipeline connections, it can be used with different models of drying ovens.

[0018] Furthermore, the circulating gas dust filtration unit of the present invention uses a filter element, which can filter out trace amounts of dust that may be carried in the airflow in the drying chamber, so as to eliminate the influence of dust on the moisture determination test results. Furthermore, the dehumidification unit of the present invention adopts the principle of rotary dehumidification. By slowly rotating the dehumidification wheel, the gas is dehumidified while the high-temperature air generated by the heater desorbs and regenerates the moisture in the dehumidification wheel, thus realizing the function of continuous gas dehumidification. Furthermore, the regenerated gas preheating unit of the present invention can utilize the heat carried by the regenerated high-temperature air through the dehumidifying rotor. By exchanging heat with the inlet air, the temperature of the high-temperature air is reduced to normal temperature on the one hand, and the inlet air is preheated on the other hand, which can save the electricity used to heat the regenerated air.

[0019] When using a drying oven for moisture determination, the moisture in the sample evaporates into the air inside the drying oven. This humid, hot air is then driven by the circulating gas fan unit 2 through the oven's gas outlet into the dehumidifying rotor. The rotor adsorbs the moisture from the circulating air before returning it to the drying oven. Meanwhile, the regenerated air, driven by the regenerated gas fan unit, is first preheated by the regenerated gas preheating unit before entering the regenerated gas heating unit. The heated air generates high-temperature regenerated gas which enters the rotor dehumidification unit. The moisture adsorbed in the rotor dehumidification unit is desorbed and then enters the regenerated gas preheating unit with the regenerated gas, where it exchanges heat with the regenerated air before being discharged from the device. This cycle repeats continuously, ensuring that the moisture evaporated from the sample in the drying oven is constantly removed, maintaining a consistently low humidity level inside the drying oven. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; wherein, (a) is the front and (b) is the back. Figure 2 This is a schematic diagram of the internal unit connections (excluding the controller) of the present invention; wherein, (a) is the front and (b) is the back. Figure 3 This is a schematic diagram of the connection between the internal units (excluding the controller) and the chassis (with the chassis top cover removed); Figure 4 This is a structural schematic diagram of the connection between the internal units (including the controller) and the chassis of the present invention (excluding the chassis bottom plate); Figure 5 This is a structural schematic diagram of the chassis of the present invention; wherein, (a) is the front and (b) is the back. Figure 6 This is a structural schematic diagram of the chassis parts of the present invention; wherein, (a) is the chassis bottom plate, and (b) is the chassis top cover plate; Figure 7 This is a schematic diagram of the structure of the circulating gas induced draft unit of the present invention; Figure 8 This is a schematic diagram of the structure of the regenerated gas induced draft unit of the present invention; Figure 9 This is a schematic diagram of the rotary dehumidification unit of the present invention; wherein, (a) is the front side and (b) is the back side (upside down). Figure 10This is a schematic diagram of the structure of the rotary dehumidification unit parts of the present invention; wherein, (a) is the lower cover of the rotary wheel, and (b) is the upper cover of the rotary wheel; Figure 11 This is a schematic diagram of the structure of the circulating gas dust filtration unit of the present invention; Figure 12 This is a schematic diagram of the structure of the circulating gas dust filtration unit parts of the present invention; wherein, (a) is the filter box and (b) is the filter element; Figure 13 This is a schematic diagram of the regenerated gas heating unit of the present invention; wherein, (a) is the upper seat of the heating rod, (b) is the lower seat of the heating rod, (c) is the main cavity, (d) is the U-shaped heating rod, and (e) is the support rod; Figure 14 This is a schematic diagram of the structure of the regenerated gas heating unit component of the present invention; Figure 15 This is a schematic diagram of the structure of the regenerated gas preheating unit of the present invention; wherein, (a) is the front and (b) is the back. Figure 16 This is a schematic diagram of the connection between the device of the present invention and the drying oven; wherein, (a) is the front and (b) is the back.

[0021] Wherein: 1-Chassis, 2-Circulating gas induced draft unit, 3-Circulating gas dust filtration unit, 4-Rotary dehumidification unit, 5-Regenerated gas heating unit, 6-Regenerated gas preheating unit, 7-Regenerated gas induced draft unit, 8-Circulating gas induced draft fan housing, 9-Circulating gas induced draft motor, 10-Circulating gas induced draft inlet flange, 11-Circulating gas induced draft outlet flange, 12-Circulating gas induced draft support, 13-Regenerated gas induced draft fan housing, 14-Regenerated gas induced draft motor, 15-Regenerated gas induced draft inlet flange, 16-Regenerated gas induced draft outlet flange, 17-Regenerated gas induced draft support, 18-Dehumidification rotor, 1 9-Synchronous gear belt, 20-Motor gear, 21-Transmission belt, 22-Rotator motor, 23-Rotator lower cover, 24-Rotator upper cover, 25-Rotator support column, 26-Chassis exhaust gas outlet screen plate, 27-Filter box, 28-Filter element, 29-Heating rod upper seat, 30-Heating rod lower seat, 31-U-shaped heating rod, 32-Heating main cavity, 33-Support rod, 34-Rotator dehumidification unit circulating gas inlet, 35-Rotator dehumidification unit regeneration gas inlet, 36-Rotator dehumidification unit regeneration gas outlet, 37-Rotator dehumidification unit circulating gas outlet, 38-Circulating gas dust filtration unit gas outlet, 3 9-Gas inlet of circulating gas dust filter unit; 40-Gas inlet of circulating gas induced draft unit; 41-Gas outlet of circulating gas induced draft unit; 42-Inlet of regenerated gas heating unit; 43-Outlet of regenerated gas heating unit; 44-Gas inlet of regenerated gas induced draft unit; 45-Gas outlet of regenerated gas induced draft unit; 46-Exhaust pipe of regenerated gas preheating unit; 47-Outer shell of regenerated gas preheating unit; 48-Vertical bend pipe of regenerated gas preheating unit; 49-Support of regenerated gas preheating unit; 50-Heat pipe of regenerated gas preheating unit; 51-Air outlet of regenerated gas preheating unit; 52-Regenerated gas preheating unit 53 - Exhaust gas inlet; 54 - Exhaust gas outlet of regenerated gas preheating unit; 55 - Air inlet of regenerated gas preheating unit; 56 - Chassis bottom plate; 57 - Chassis top cover; 58 - Side screws of chassis; 59 - Circulating gas inlet of chassis; 60 - Circulating gas outlet of chassis; 61 - Bottom screws of chassis; 62 - Display opening; 63 - Exhaust gas outlet of chassis; 64 - Display; 65 - Power switch; 66 - Drying oven; 67 - Circulating gas inlet pipe; 68 - Circulating gas outlet pipe; 69 - Controller; 70 - Controller bracket; 71 - Temperature and humidity sensor; 72 - Thermal flow meter. Detailed Implementation

[0022] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0023] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0024] This embodiment provides a gas dehumidification device and method for a drying oven used for coal moisture detection, which can shorten the test cycle for coal moisture detection.

[0025] like Figures 1 to 16 As shown, the present invention provides a gas dehumidification device for a drying chamber for coal moisture detection, comprising a casing 1, a circulating gas induced draft unit 2, a circulating gas dust filtration unit 3, a rotary dehumidification unit 4, a regenerated gas heating unit 5, a regenerated gas preheating unit 6, a regenerated gas induced draft unit 7, a display 64, a power switch 65, a drying chamber 66, a controller 69, and a controller bracket 70.

[0026] See Figure 1 In (a) and (b), a power switch 65 and a display 64 are installed on the front of the chassis 1, and a circulating gas induced draft unit 2 and a circulating gas dust filter unit 3 are installed on the back.

[0027] See Figure 2 (a) and (b) Figure 3 and Figure 4 The connections between the circulating gas induced draft unit 2, the circulating gas dust filtration unit 3, the rotary dehumidifier unit 4, the regenerated gas heating unit 5, the regenerated gas preheating unit 6, and the regenerated gas induced draft unit 7 are as follows: the outlet of the drying chamber 66 is connected to the inlet of the circulating gas induced draft unit 2; the circulating gas induced draft unit 2 is connected to the rotary dehumidifier unit 4; and the rotary dehumidifier unit 4 is connected to the drying chamber 66. The regenerated gas induced draft unit 7 is connected to the regenerated gas preheating unit 6; the regenerated gas preheating unit 6 is connected to the regenerated gas heating unit 5; the regenerated gas heating unit 5 is connected to the rotary dehumidifier unit 4; and the rotary dehumidifier unit 4 is connected to the circulating gas dust filtration unit 3. The controller 69 is located on one side of the circulating gas dust filtration unit 3.

[0028] See Figure 5 (a) and (b) and Figure 6In (a) and (b), chassis 1 includes a chassis base plate 55, a chassis top cover plate 56, and chassis side screws 57. The chassis top cover plate 56 is mounted on the chassis base plate 55, forming a cavity. Specifically, the chassis base plate 55 includes a first base plate, a second base plate, and a third base plate connected together. The second base plate is horizontally positioned, while the first and third base plates are vertically positioned at opposite ends of the second base plate. The first base plate has a chassis recirculated gas inlet 58 and a chassis recirculated gas outlet 59, and the third base plate has a display opening 62. The chassis top cover plate 56 includes a first top cover plate, a second top cover plate, and a third top cover plate. The second top cover plate is horizontally positioned, while the first and third top covers plate are positioned at opposite ends of the second top cover plate. The second top cover plate has a chassis exhaust gas outlet 63, and a chassis exhaust gas outlet mesh plate 26 is installed at the chassis exhaust gas outlet 63. The first base plate, the first top cover plate, and the third top cover plate are connected by screws 57 on the side of the chassis. The second base plate, the first top cover plate, and the third top cover plate are also connected by screws 57 on the side of the chassis.

[0029] See Figure 7 The circulating gas induced draft unit 2 includes a circulating gas induced draft fan housing 8, a circulating gas induced draft motor 9, a circulating gas induced draft inlet flange 10, a circulating gas induced draft outlet flange 11, and a circulating gas induced draft support 12. The circulating gas induced draft support 12 is fixed by screws 61 on the bottom of the housing. The circulating gas induced draft fan housing 8 is mounted on the circulating gas induced draft support 12. The circulating gas induced draft fan housing 8 has a circulating gas induced draft inlet flange 10 at one end, which has a circulating gas induced draft unit gas inlet 40. The circulating gas induced draft motor 9 is mounted on the other end. The circulating gas induced draft fan housing 8 has a circulating gas induced draft outlet flange 11 on its side wall, which has a circulating gas induced draft unit gas outlet 41.

[0030] See Figure 8 The regenerated gas induced draft unit 7 includes a regenerated gas induced draft fan housing 13, a regenerated gas induced draft motor 14, a regenerated gas induced draft inlet flange 15, a regenerated gas induced draft outlet flange 16, and a regenerated gas induced draft support 17. The regenerated gas induced draft fan housing 13 is mounted on the regenerated gas induced draft support 17. The regenerated gas induced draft inlet flange 15 is located at one end of the regenerated gas induced draft fan housing 13, and a regenerated gas induced draft unit gas inlet 44 is located on the regenerated gas induced draft inlet flange 15. The regenerated gas induced draft motor 14 is located at the other end of the regenerated gas induced draft fan housing 13. The regenerated gas induced draft outlet flange 16 is located on the side wall of the regenerated gas induced draft fan housing 13, and a regenerated gas induced draft unit gas outlet 45 is located on the regenerated gas induced draft outlet flange 16.

[0031] See Figure 9 (a) and (b) and Figure 10In (a) and (b), the rotary dehumidification unit 4 includes a rotary motor 22, a lower rotary cover 23, an upper rotary cover 24, and rotary support columns 25. The rotary motor 22 is installed inside the lower rotary cover 23. A regeneration gas outlet 36 for the rotary dehumidification unit is provided on one side wall of the lower rotary cover 23, and a circulating gas outlet 37 for the rotary dehumidification unit is provided on the side wall opposite to the regeneration gas outlet 36. Four rotary support columns 25 are provided on the top of the lower rotary cover 23, of which two rotary support columns 25 are located at the top. The unit is equipped with a support plate, on which a rotary motor 22 is mounted. Two additional rotary support columns 25 are topped with rotary upper covers 24, and a dehumidifying rotary wheel 18 is positioned between the rotary upper cover 24 and the rotary lower cover 23. The rotary motor 22 is connected to a motor gear 20, which is connected to a drive belt 21, which is connected to the dehumidifying rotary wheel 18. One end of the rotary lower cover 23 has a rotary dehumidification unit circulating gas inlet 34, and the other end has a rotary dehumidification unit regeneration gas inlet 35. The rotary dehumidification unit circulating gas enters through the rotary dehumidification unit circulating gas inlet 34 and exits through the rotary dehumidification unit circulating gas outlet 37. The rotary dehumidification unit regeneration gas enters through the rotary dehumidification unit regeneration gas inlet 35 and exits through the rotary dehumidification unit regeneration gas outlet 36. Temperature and humidity sensors 71 are mounted on the top surfaces of the rotary upper cover 24 and the rotary lower cover 23.

[0032] See Figure 11 and Figure 12 In (a) and (b), the circulating gas dust filtration unit 3 includes a filter box 27, a filter element 28, a circulating gas dust filtration unit gas outlet 38, and a circulating gas dust filtration unit gas inlet 39. The filter element 28 is installed inside the filter box 27. The circulating gas dust filtration unit gas inlet 39 is installed on one side wall of the filter box 27, and the circulating gas dust filtration unit gas outlet 38 is installed on the other side wall. The gas entering the filter box 27 through the circulating gas dust filtration unit gas inlet 39 is filtered by the filter element 28 and then discharged through the circulating gas dust filtration unit gas outlet 38.

[0033] See Figure 13 and Figure 14In (a), (b), (c), and (d), the regenerated gas heating unit 5 includes an upper heating rod seat 29, a lower heating rod seat 30, U-shaped heating rods 31, a main heating chamber 32, and support rods 33. The main heating chamber 32 has a regenerated gas heating unit inlet 42 on one side and a regenerated gas heating unit outlet 43 on the other side. The lower heating rod seat 30 is located at the top of the main heating chamber 32, and several support rods 33 are mounted on the lower heating rod seat 30. The upper heating rod seat 29 is located on the top of the support rods 33. A groove is provided on the upper surface of the upper heating rod seat 29, and several through holes are provided at the bottom of the groove. A groove is provided on the lower surface of the lower heating rod seat 30, and several through holes are provided at the top of the groove. The support rods 33 are disposed within the through holes of the upper heating rod seat 29 and the lower heating rod seat 30. Several U-shaped heating rods 31 are disposed within the groove of the upper heating rod seat 29.

[0034] See Figure 15 In (a) and (b), the regenerated gas preheating unit 6 includes a regenerated gas preheating unit support 49, a regenerated gas preheating unit vertical bend pipe 48 is provided on the top of the regenerated gas preheating unit support 49, a regenerated gas preheating unit exhaust gas inlet 52 is provided on the side wall of the regenerated gas preheating unit vertical bend pipe 48, a connecting pipe is provided on the top of the regenerated gas preheating unit vertical bend pipe 48, a regenerated gas preheating unit air inlet 54 is provided on the side wall of the connecting pipe, a regenerated gas preheating unit shell 47 is provided on the top of the connecting pipe, a regenerated gas preheating unit air outlet 51 is provided on the side wall of the regenerated gas preheating unit shell 47, a regenerated gas preheating unit heat pipe 50 is provided inside the regenerated gas preheating unit air outlet 51, a regenerated gas preheating unit exhaust pipe 46 is provided on the top of the regenerated gas preheating unit shell 47, and a regenerated gas preheating unit exhaust gas outlet 53 is provided on the top of the regenerated gas preheating unit exhaust pipe 46.

[0035] See Figure 16 In (a) and (b), the gas outlet 41 of the circulating gas induced draft unit 2 on the chassis 1 is connected to the gas inlet of the drying chamber 66 through the circulating gas inlet pipe 67, and the gas inlet 39 of the circulating gas dust filter unit 3 on the chassis 1 is connected to the gas outlet of the drying chamber 66 through the circulating gas outlet pipe 68.

[0036] Specifically, the rotary dehumidification unit 4's circulating gas inlet 34 is connected to the circulating gas dust filter unit 3's circulating gas outlet 38 via a flange; the rotary dehumidification unit 4's circulating gas outlet 37 is connected to the circulating gas induced draft unit 2's circulating gas inlet 40 via a flange; the rotary dehumidification unit 4's regeneration gas inlet 35 is connected to the regeneration gas heating unit 5's regeneration gas heating unit outlet 43 via a flange; the rotary dehumidification unit 4's regeneration gas outlet 36 is connected to the regeneration gas induced draft unit 7's regeneration gas induced draft unit inlet 44 via a flange; and the regeneration gas induced draft unit 7's regeneration... The gas outlet 45 of the gas induced draft unit is connected to the exhaust gas inlet 52 of the regenerated gas preheating unit 6 via a flange. The air outlet 51 of the regenerated gas preheating unit 6 is connected to the inlet 42 of the regenerated gas heating unit 5 via a flange. After the above units are connected together, they are fixed to the chassis base plate 55 with screws through the circulating gas induced draft support 12 of the circulating gas induced draft unit 2, the regenerated gas induced draft support 17 of the regenerated gas induced draft unit 7, and the regenerated gas preheating unit support 49 of the regenerated gas preheating unit 6 to be installed in the chassis 1. The controller bracket 70 is fixed to the chassis top cover plate 56 with screws, and the controller 69 is placed in the controller bracket 70. At this time, the chassis exhaust gas outlet 63 of the chassis 1 is directly opposite the exhaust gas outlet 53 of the regenerated gas preheating unit. The gas outlet 41 of the circulating gas induced draft unit extends out of the circulating gas outlet 59 of the chassis 1, and the gas inlet 39 of the circulating gas dust filter unit extends out of the circulating gas inlet 58 of the chassis. The monitor 64 and power switch 65 are embedded in the side of the chassis base plate 55. The chassis base plate 55 and the chassis top cover are connected by screws 57.

[0037] The controller 69 and display 64 of the device of this invention are connected to a 220V power supply via a power switch 65; electrical components such as the circulating gas induced draft unit 2 (induced draft motor), the regenerated gas induced draft unit 7 (induced draft motor), the regenerated gas heating unit 5 (heating rod), and the rotary dehumidification unit 4 (dehumidification rotary motor) are connected to the controller 69; the temperature and humidity sensor 71 and the thermal flow meter 72 are connected to the controller 69 via signal lines; the controller 69 and the display 64 are connected via signal lines; the gas path is connected to the drying chamber 66 in the following way: the gas inlet 39 of the circulating gas dust filter unit 3 is connected to the gas outlet of the drying chamber 66 via a circulating gas outlet pipe 68; the gas outlet 41 of the circulating gas induced draft unit 2 is connected to the gas inlet of the drying chamber 66 via a circulating gas inlet pipe 67. Figure 15 As shown.

[0038] The gas dehumidification method for a drying box for coal moisture detection based on the aforementioned device in this invention includes the following steps: When using the device of this invention, first turn on the power to the drying oven 66, then turn on the power switch 65 of the device. The display 64 and the controller 69 are powered on and begin operation. The circulating gas induced draft motor 9 of the circulating gas induced draft unit 2 and the regeneration gas induced draft motor 14 of the regeneration gas induced draft unit 7 are powered on and rotate. The U-shaped heating rod 31 of the regeneration gas heating unit 5 is powered on and begins heating. The rotary dehumidification unit 4's rotary motor 22 is powered on and rotates, thereby driving the dehumidification rotary wheel 18 to rotate. The circulating air path and the regeneration air path are then opened. The controller 69 controls the circulating gas / regeneration gas flow rate and temperature to the set values ​​and transmits the collected data on the working status of the regeneration gas induced draft motor 14 / rotary motor 22, the heating rod, the gas flow rate, and the temperature and humidity values ​​to the display 64 for display.

[0039] When the drying chamber 66 is used for moisture determination, the moisture in the sample evaporates into the air in the drying chamber 66. At this time, the hot and humid air in the drying chamber 66 is driven by the circulating gas fan motor 9 of the circulating gas fan unit 2 after passing through the drying chamber gas outlet and connecting hose. The dehumidifying fan 18 adsorbs the moisture in the circulating air and then returns to the drying chamber 66 through the connecting hose and the drying chamber gas inlet. The regenerated air is driven by the regenerated gas fan motor 14 of the regenerated gas fan unit 7. After being preheated by the regenerated gas preheating unit 6, it enters the regenerated gas heating unit 5. After being heated by the U-shaped heating rod 31, it generates high-temperature regenerated gas and enters the dehumidifying fan unit 4. When passing through the dehumidifying fan 18, the high-temperature regenerated gas heats the dehumidifying fan 18. The moisture adsorbed in the circulating gas in the dehumidifying fan 18 is desorbed and enters the regenerated gas preheating unit 6 with the regenerated gas. After exchanging heat with the regenerated air, it is discharged from the device. This process is repeated continuously, and the moisture evaporated from the sample in the drying oven 66 is constantly discharged outside the drying oven 66, ensuring that the air humidity inside the drying oven 66 is always kept at a low level.

[0040] The above description is only of the preferred embodiment of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All modifications made within the scope of the independent claims of the present invention are also within the scope of protection of the present invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Claims

1. A gas dehumidification device for a drying oven used for coal moisture detection, characterized in that, It includes a circulating gas dust filtration unit (3), a regenerated gas heating unit (5), a regenerated gas preheating unit (6), a regenerated gas exhaust unit (7), and a circulating gas exhaust unit (2) and a rotary dehumidification unit (4) connected to the drying box (66). The circulating gas exhaust unit (2) is connected to the rotary dehumidification unit (4), the regenerated gas exhaust unit (7) is connected to the regenerated gas preheating unit (6), the regenerated gas preheating unit (6) is connected to the regenerated gas heating unit (5), the regenerated gas heating unit (5) is connected to the rotary dehumidification unit (4), and the rotary dehumidification unit (4) is connected to the circulating gas dust filtration unit (3). The circulating gas induced draft unit (2) includes a circulating gas induced draft fan housing (8), a circulating gas induced draft motor (9), a circulating gas induced draft inlet flange (10), a circulating gas induced draft outlet flange (11), and a circulating gas induced draft support (12). Among them, a circulating gas induced draft fan housing (8) is provided on the circulating gas induced draft fan support (12), a circulating gas induced draft fan housing (8) is provided at one end of the circulating gas induced draft fan housing (8), a circulating gas induced draft fan inlet flange (10) is provided on the circulating gas induced draft fan inlet flange (10), a circulating gas induced draft fan unit gas inlet (40) is provided on the circulating gas induced draft fan housing (8), a circulating gas induced draft fan motor (9) is provided at the other end of the circulating gas induced draft fan housing (8), a circulating gas induced draft fan outlet flange (11) is provided on the side wall of the circulating gas induced draft fan housing (8), and a circulating gas induced draft fan unit gas outlet (41) is provided on the circulating gas induced draft fan outlet flange (11). The circulating gas dust filtration unit (3) is connected to the outlet side of the drying box (66), and the circulating gas induced draft unit (2) is connected to the inlet side of the drying box (66). The hot and humid air in the drying box (66) is driven by the circulating gas induced draft motor (9) of the circulating gas induced draft unit (2) after passing through the gas outlet of the drying box and the connecting hose to enter the rotary dehumidification unit (4). The regenerated gas preheating unit (6) includes a regenerated gas preheating unit support (49), a regenerated gas preheating unit vertical bend pipe (48) is provided on the top of the regenerated gas preheating unit support (49), a regenerated gas preheating unit exhaust gas inlet (52) is provided on the side wall of the regenerated gas preheating unit vertical bend pipe (48), a connecting pipe is provided on the top of the regenerated gas preheating unit vertical bend pipe (48), a regenerated gas preheating unit air inlet exhaust gas outlet (54) is provided on the side wall of the connecting pipe, and a regenerated gas preheating unit shell (47) is provided on the top of the connecting pipe. The regenerated gas preheating unit housing (47) has an air outlet (51) on its side wall, a heat pipe (50) inside the exhaust outlet (4751) of the air outlet of the regenerated gas preheating unit, an air outlet (51) on its side wall, an exhaust pipe (46) on its top, and an exhaust outlet (53) on its top.

2. The gas dehumidification device for a drying oven for coal moisture detection according to claim 1, characterized in that, It also includes a chassis (1), a circulating gas induced draft unit (2) and a circulating gas dust filter unit (3) mounted on the chassis (1).

3. The gas dehumidification device for a drying oven for coal moisture detection according to claim 1, characterized in that, It also includes a controller (69), a circulating gas induced draft unit (2), a regenerated gas induced draft unit (7), a regenerated gas heating unit (5), and a rotary dehumidification unit (4) connected to the controller (69).

4. The gas dehumidification device for a drying oven for coal moisture detection according to claim 1, characterized in that, The regenerated gas induced draft unit (7) includes a regenerated gas induced draft fan housing (13), a regenerated gas induced draft motor (14), a regenerated gas induced draft inlet flange (15), a regenerated gas induced draft outlet flange (16), and a regenerated gas induced draft support (17). Among them, a regenerated gas induced draft fan housing (13) is provided on the regenerated gas induced draft fan support (17), a regenerated gas induced draft fan inlet flange (15) is provided at one end of the regenerated gas induced draft fan housing (13), a regenerated gas induced draft fan unit gas inlet (44) is provided on the regenerated gas induced draft fan inlet flange (15), and a regenerated gas induced draft fan motor (14) is provided at the other end of the regenerated gas induced draft fan housing (13); a regenerated gas induced draft fan outlet flange (16) is provided on the side wall of the regenerated gas induced draft fan housing (13), and a regenerated gas induced draft fan unit gas outlet is provided on the regenerated gas induced draft fan outlet flange (16).

5. The gas dehumidification device for a drying oven for coal moisture detection according to claim 1, characterized in that, The rotary dehumidification unit (4) includes a rotary motor (22), a lower rotary cover (23), an upper rotary cover (24), and a rotary support column (25). The rotor motor (22) is installed inside the rotor lower cover (23). A rotor dehumidification unit regeneration gas outlet (36) is installed on one side wall of the rotor lower cover (23), and a rotor dehumidification unit circulating gas outlet (37) is installed on the other side wall. Several rotor support columns (25) are installed on the top of the rotor lower cover (23). A support plate is installed on the top of the rotor support column (25), and a rotor motor (22) is installed on the support plate. A rotor upper cover (24) is installed on the top of the support column (25), and the rotor upper cover (25) is installed on the top of the support column (25). 4) A dehumidifying wheel (18) is provided between the wheel and the lower cover (23). The wheel motor (22) is connected to a motor gear (20). The motor gear (20) is connected to a transmission belt (21). The transmission belt (21) is connected to the dehumidifying wheel (18). One end of the lower cover (23) is provided with a circulating gas inlet (34) for the wheel dehumidification unit, and the other end is provided with a regeneration gas inlet (35) for the wheel dehumidification unit. Temperature and humidity sensors (71) are provided on the top surfaces of the upper cover (24) and the lower cover (23).

6. The gas dehumidification device for a drying oven for coal moisture detection according to claim 1, characterized in that, The circulating gas dust filtration unit (3) includes a filter box (27) and a filter element (28); The filter box (27) is equipped with a filter element (28), and a gas inlet (39) of the circulating gas dust filter unit is provided on one side wall of the filter box (27), and a gas outlet (38) of the circulating gas dust filter unit is provided on the other side wall.

7. The gas dehumidification device for a drying oven for coal moisture detection according to claim 1, characterized in that, The regenerated gas heating unit (5) includes an upper heating rod seat (29), a lower heating rod seat (30), a U-shaped heating rod (31), a main heating chamber (32), and a support rod (33). The main heating chamber (32) has a regenerated gas heating unit inlet (42) on one side and a regenerated gas heating unit outlet (43) on the other side. The lower heating rod seat (30) is located on the top of the main heating chamber (32). Several support rods (33) are located on the lower heating rod seat (30). The upper heating rod seat (29) is located on the top of the several support rods (33). The upper surface of the upper heating rod seat (29) is provided with a groove, and several through holes are provided at the bottom of the groove. The lower surface of the lower heating rod seat (30) is provided with a groove, and several through holes are provided at the top of the groove. The support rods (33) are located in the through holes of the upper heating rod seat (29) and the lower heating rod seat (30). Several U-shaped heating rods (31) are located in the groove of the upper heating rod seat (29).

8. A method for dehumidifying gas in a drying chamber for coal moisture detection using the apparatus described in any one of claims 1-7, characterized in that, Includes the following steps: The moisture in the coal moisture test sample evaporates into the air in the drying chamber (66). The hot and humid air in the drying chamber (66) enters the rotary dehumidification unit (4) through the circulating gas induced draft unit (2). The rotary dehumidification unit (4) adsorbs the moisture in the circulating air and dries the air before it enters the drying chamber (66). The regenerated air is driven by the regenerated gas induced draft unit (7). It is first preheated by the regenerated gas preheating unit (6) and then enters the regenerated gas heating unit (5). After being heated, it generates high-temperature regenerated gas and then enters the rotary dehumidification unit (4). The moisture adsorbed in the circulating gas in the rotary dehumidification unit (4) is desorbed and enters the regenerated gas preheating unit (6) with the regenerated gas. After exchanging heat with the regenerated air, it is discharged.

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