Coulter drying equipment

Abstract

The utility model provides coulter drying equipment, and relates to the technical field of material drying. The coulter drying equipment comprises a drying cylinder, a vacuum pump and a stirring assembly; the vacuum pump communicates with the drying cylinder; the stirring assembly comprises a rotating shaft and a plurality of coulters mounted on the rotating shaft; the rotating shaft is rotationally arranged in the drying cylinder; the first air storage tank and the second air storage tank are communicated with the drying cylinder; wherein the first gas storage tank is used for storing oxygen-containing gas; the second gas storage tank is used for storing other gases different from the gases in the first gas storage tank, and valves are arranged on pipelines for communicating the gas storage tanks with the drying cylinder so as to control the communicating state among the first gas storage tank, the second gas storage tank and the drying cylinder. According to the coulter drying equipment, atmosphere controllable treatment can be conducted on materials in the drying process of the materials.

Description

Technical Field

[0001] The present application relates to the technical field of material drying, and in particular to a plowshare drying device. Background Art

[0002] Plough drying equipment is generally used in chemical, pharmaceutical, metallurgical, environmental protection and other industries; it is suitable for drying various powdery materials, granular materials and block materials. During the drying process, the drying cylinder of the existing plough drying equipment is in a vacuum environment. However, some materials need to be oxidized during the drying process. Therefore, the existing plough drying equipment is difficult to meet the process requirements of the product. Utility Model Content

[0003] In order to overcome the deficiencies in the prior art, the present application provides a plow blade drying device.

[0004] This application provides the following technical solutions:

[0005] A plowshare drying device comprises a drying cylinder, a vacuum pump and a stirring assembly; the vacuum pump is connected to the drying cylinder; the stirring assembly comprises a rotating shaft and a plurality of plowshares mounted on the rotating shaft; the rotating shaft is rotatably arranged in the drying cylinder; the plowshare drying device also comprises a first gas storage tank and a second gas storage tank connected to the drying cylinder; wherein the first gas storage tank is used to store a gas containing oxygen; the second gas storage tank is used to store other gases different from the gas in the first gas storage tank (such as protective gases or inert gases such as nitrogen, helium and argon), and a valve is provided on the pipeline connecting between the gas storage tank and the drying cylinder to control the connection state between the first gas storage tank, the second gas storage tank and the drying cylinder.

[0006] In a feasible embodiment, the plow drying equipment also includes a gas flow controller provided on the pipeline connecting the gas storage tank and the drying cylinder, and the valve is located in the gas flow controller, and the gas flow controller is used to control the connection state between the first gas storage tank, the second gas storage tank and the drying cylinder.

[0007] In a feasible implementation, the gas flow controller includes a first gas flow controller connected to the first gas storage tank and a second gas flow controller connected to the second gas storage tank.

[0008] In a feasible implementation manner, the plow drying device further includes a control unit; the control unit is communicatively connected to the first gas flow controller and the second gas flow controller respectively.

[0009] In a feasible embodiment, the plow drying equipment also includes a first control valve and a second control valve; the first control valve is arranged on the pipeline connecting the first gas flow controller and the drying cylinder; the second control valve is arranged on the pipeline connecting the second gas flow and the drying cylinder; the first control valve and the second control valve are respectively connected to the control unit for communication.

[0010] In a feasible implementation manner, at least one air inlet is provided on the pipeline communicating between the gas storage tank and the drying cylinder so as to allow the gas in the gas storage tank to enter the drying cylinder.

[0011] In a feasible embodiment, the plow drying equipment also includes an air equalizing pipe arranged in the drying cylinder; the air equalizing pipe is connected to the air inlet of the drying cylinder, and a plurality of air outlet holes are opened on the tube wall of the air equalizing pipe, and the plurality of air outlet holes are arranged at intervals along the axial direction of the air equalizing pipe.

[0012] In a feasible implementation manner, the plow blade drying device further includes a dustproof net; the dustproof net is fixed in the air outlet.

[0013] In a feasible implementation manner, the dustproof net is a high temperature resistant dustproof net.

[0014] In a feasible embodiment, the plowshare drying device further comprises a mixer; the mixer is arranged on a pipeline connecting the gas storage tank and the drying cylinder. The mixer is used to evenly mix the oxygen-containing gas in the first gas storage tank and the gas in the second gas storage tank before the two gas enter the drying cylinder.

[0015] In a feasible implementation manner, the plowshare drying equipment further comprises an oxygen content detector disposed on the drying cylinder.

[0016] In a possible implementation, a probe of the oxygen content detector extends into the drying cylinder.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The plowshare drying equipment provided in the present application is achieved by connecting a vacuum pump, a first gas storage tank, and a second gas storage tank to a drying cylinder respectively. When the plowshare drying equipment dries materials that do not require oxidation, after the materials are fed into the drying cylinder, the vacuum pump can extract the gas in the drying cylinder, so that the drying cylinder is in a vacuum environment, thereby preventing the materials from being oxidized during drying. When the plowshare drying equipment dries materials that require oxidation, after the materials are fed into the drying cylinder, the first gas storage tank can continuously pass oxygen-containing gas into the drying cylinder, and the second gas storage tank can continuously pass other gases (such as protective gas) into the drying cylinder until the mixed gas formed by the oxygen-containing gas and the protective gas completely replaces the original gas in the drying cylinder, thereby drying the materials while also oxidizing the materials. Multiple plowshares can stir the materials in the drying cylinder driven by the rotating shaft to speed up the drying speed of the materials.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a plowshare drying device according to an embodiment of the present application is shown;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of a dustproof net (high temperature resistant) according to an embodiment of the present application is shown.

[0023] Description of main component symbols:

[0024] 1-drying cylinder; 2-drying chamber; 3-rotating shaft; 4-plow blade; 5-first gas storage tank; 6-second gas storage tank; 7-connecting pipe; 8-first gas flow controller; 9-second gas flow controller; 10-vacuum pump; 11-gas equalizing pipe; 111-air outlet; 12-air inlet; 13-dustproof net; 14-first control valve; 15-second control valve; 16-mixer; 17-oxygen content detector; 18-third control valve; 19-vacuum tube; 20-condenser. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the related art, after the feeding is completed, the plowshare drying equipment will evacuate the container containing the material to dry the material in a vacuum environment. However, in order to meet the production process requirements, some materials need to be oxidized during the drying process, which makes it difficult for existing plowshare drying equipment to meet the production process requirements of some materials.

[0031] In view of this, the present application provides a plowshare drying device, which can dry materials in a vacuum environment or in an oxygen-containing environment to meet the production process requirements of different materials.

[0032] The materials dried by the plowshare drying equipment of the present application may be powdery materials, granular materials and block materials.

[0033] See also Figure 1 In one embodiment of the present application, a plowshare drying device is provided; the plowshare drying device includes a drying cylinder 1, a vacuum pump 10, a stirring assembly, a first air storage tank 5 and a second air storage tank 6.

[0034] The drying cylinder 1 is connected to the vacuum pump 10; the drying cylinder 1 is used to contain the material to be dried; the vacuum pump 10 is used to extract the gas in the drying cylinder 1 so that the drying cylinder 1 is in a vacuum environment.

[0035] The stirring assembly includes a rotating shaft 3 and a plurality of plowshares 4; the rotating shaft 3 is rotatably disposed in the drying cylinder 1; and the plurality of plowshares 4 are respectively mounted on the rotating shaft 3. The rotating shaft 3 is used to drive the plurality of plowshares 4 to rotate simultaneously, so that the plurality of plowshares 4 can stir the material in the drying cylinder 1 during the drying process, thereby accelerating the drying speed of the material.

[0036] The first gas tank 5 and the second gas tank 6 are both connected to the drying cylinder 1; the first gas tank 5 is used to store oxygen-containing gas and can pass oxygen-containing gas into the drying cylinder 1; the second gas tank 6 is used to store other different types of gases (such as protective gas) and can pass protective gas into the drying cylinder 1, and a valve is provided on the pipeline (connecting pipe) 7 connecting the first gas tank 5 and the second gas tank 6 with the drying cylinder 1 to control the connection state between the first gas tank 5, the second gas tank 6 and the drying cylinder 1.

[0037] Exemplarily, the oxygen-containing gas may be air, pure oxygen or the like; the protective gas may be nitrogen, helium or the like.

[0038] It should be noted that the protective gas does not react with the material in the drying cylinder 1; the oxygen in the oxygen-containing gas can oxidize the gas in the drying cylinder 1. When the protective gas and the oxygen-containing gas are introduced into the drying cylinder 1 in a certain ratio, the oxygen content ratio in the drying cylinder 1 can be controlled to meet the oxidation requirements of different materials.

[0039] When the plowshare drying equipment dries materials that do not require oxidation, after the materials are fed into the drying cylinder 1, the vacuum pump 10 extracts the gas in the drying cylinder 1 to place the drying cylinder 1 in a vacuum environment, thereby preventing the materials from being oxidized during drying.

[0040] When the plowshare drying equipment dries materials that need to be oxidized, after the materials are fed into the drying cylinder 1, the first gas storage tank 5 continuously introduces oxygen-containing gas into the drying barrel, and the second gas storage tank 6 continuously introduces protective gas into the drying cylinder 1 until the mixed gas formed by the oxygen-containing gas and the protective gas completely replaces the original gas in the drying cylinder 1, thereby oxidizing the materials while drying them.

[0041] The plowshare drying equipment of the present application can perform indirect heating and drying by means of electric heating or oil heating.

[0042] See also Figure 1 The drying cylinder 1 has a drying chamber 2 inside, and the drying chamber 2 is used to accommodate materials. A rotating shaft 3 is rotatably arranged in the drying chamber 2, and a plow blade 4 can stir the materials in the drying chamber 2.

[0043] The drying cylinder 1 has a feed inlet and a discharge port which are connected to the drying chamber 2; the material to be dried can be put into the drying chamber 2 through the feed inlet, and the dried material can be discharged through the discharge port.

[0044] Optionally, the feed port and the discharge port are symmetrically arranged on the drying cylinder 1 .

[0045] In some implementations, the axis of the rotating shaft 3 coincides with the axis of the drying cylinder 1; a plurality of plowshares 4 are staggered and arranged along the axial direction of the rotating shaft 3 to improve the stirring ability of the material, thereby improving the uniform mixing degree of the material and accelerating the drying speed of the material.

[0046] In some embodiments, the stirring assembly further comprises a driving member, and an output end of the driving member is rotatably connected to one end of the rotating shaft 3. The driving member is used to drive the rotating shaft 3 to rotate, so as to drive the plow blade 4 to stir the material.

[0047] Exemplarily, the driving member may be a motor, a heat engine or the like.

[0048] See also Figure 1 In some embodiments, the plow drying equipment also includes a gas flow controller (8 and 9) provided on a pipeline (connecting pipe) 7 connecting the gas storage tank and the drying cylinder 1, and a valve is located in the gas flow controller, and the gas flow controller is used to control the connection state between the first gas storage tank 5, the second gas storage tank 6 and the drying cylinder 1.

[0049] In some embodiments, one end of the connecting pipe 7 is connected to the gas outlet of the first gas storage tank 5 and the gas outlet of the second gas storage tank 6, respectively, and the other end of the connecting pipe 7 is connected to the drying chamber 2. The oxygen-containing gas and the protective gas can be mixed in the connecting pipe 7 to form a mixed gas.

[0050] In some embodiments, the plow drying equipment also includes a first gas flow controller 8 and a second gas flow controller 9; the first gas flow controller 8 is arranged between the gas outlet of the first gas storage tank 5 and the connecting pipe 7; the second gas flow controller 9 is arranged between the gas outlet of the second gas storage tank 6 and the connecting pipe 7.

[0051] The first gas flow controller 8 can adjust the flow rate of the oxygen-containing gas introduced into the connecting pipe 7 from the first gas storage tank 5 by controlling the opening of its internal valve. The second gas flow controller 9 can adjust the flow rate of the protective gas introduced into the connecting pipe 7 from the second gas storage tank 6 by controlling the opening of its internal valve, thereby controlling the oxygen content ratio of the mixed gas in the connecting pipe 7.

[0052] Furthermore, the plow drying device also includes a control unit; the control unit is respectively connected to the first gas flow controller 8 and the second gas flow controller 9. The control unit can adjust the opening of the first gas flow controller 8 and the second gas flow controller 9 according to the oxygen content ratio of the gas required for the oxidation of the material, so that the oxygen content ratio in the mixed gas meets the oxidation requirements of the material.

[0053] Exemplarily, the control unit is a PLC (Programmable Logic Controller) or a single chip microcomputer.

[0054] Furthermore, the plow drying equipment also includes a first control valve 14 and a second control valve 15; the first control valve 14 is arranged between the first gas flow controller 8 and the connecting pipe 7; the second control valve 15 is arranged between the second gas flow controller 9 and the connecting pipe 7; the first control valve 14 and the second control valve 15 are respectively communicatively connected to the control unit.

[0055] The first control valve 14 is used to control the connection and disconnection between the first gas flow controller 8 and the connecting pipe 7 ; the second control valve 15 is used to control the connection and disconnection between the second gas flow controller 9 and the connecting pipe 7 .

[0056] Furthermore, the plowshare drying device further comprises a third control valve 18, which is arranged at one end of the connecting pipe 7 away from the first gas storage tank 5 and is communicatively connected to the control unit. The third control valve 18 is used to prevent the residual mixed gas in the connecting pipe 7 from flowing into the drying chamber 2.

[0057] When the plow dryer dries materials that do not require oxidation, the control unit controls the first control valve 14 , the second control valve 15 and the third control valve 18 to close to prevent oxygen-containing gas or protective gas from flowing into the drying chamber 2 .

[0058] When the plowshare drying equipment dries materials that need to be oxidized, the control unit controls the first control valve 14, the second control valve 15 and the third control valve 18 to open until the mixed gas completely replaces the original gas in the drying chamber 2, and then controls the first control valve 14, the second control valve 15 and the third control valve 18 to close.

[0059] In some embodiments, the plowshare drying device further includes a mixer 16 , which is disposed on a connecting pipe 7 communicating between the air storage tank and the drying cylinder 1 .

[0060] The oxygen-containing gas discharged from the gas outlet of the first gas storage tank 5 and the protective gas discharged from the gas outlet of the second gas storage tank 6 can be preliminarily mixed in the connecting pipe 7. When the preliminarily mixed mixed gas passes through the mixer 16, the mixer 16 can further mix the oxygen-containing gas and the protective gas evenly to ensure that the oxygen content ratio in the mixed gas introduced into the drying chamber 2 is stable, thereby effectively preventing the material in the drying chamber 2 from having different degrees of oxidation.

[0061] See also Figure 1 In some embodiments, the plowshare drying device further comprises an air equalizing pipe 11, which is disposed in the drying chamber 2 and is connected to an end of the connecting pipe 7 away from the first gas storage tank 5. The air equalizing pipe 11 is used to spray the mixed gas in a direction intersecting with the axial direction of the air equalizing pipe 11.

[0062] Furthermore, a plurality of gas outlet holes 111 are provided on the wall of the gas equalizing tube 11, some of the gas outlet holes 111 are arranged at intervals along the axial direction of the gas equalizing tube 11, and other gas outlet holes 111 are arranged at intervals around the circumference of the gas equalizing tube 11. The mixed gas in the gas equalizing tube 11 can be ejected from different gas outlet holes 111, so that the mixed gas is evenly distributed in the drying chamber 2.

[0063] Furthermore, the axial direction of the gas equalizing pipe 11 , the axial direction of the rotating shaft 3 and the axial direction of the drying cylinder 1 are parallel to each other, so as to further improve the uniformity of the distribution of the mixed gas in the drying chamber 2 .

[0064] In some embodiments, the plowshare drying device includes an air inlet 12; one end of the air inlet 12 is connected to an end of the connecting pipe 7 away from the first air storage tank 5, and the other end of the air inlet 12 extends into the drying chamber 2 and is connected to the inside of the air equalizing pipe 11. The air inlet 12 is used to connect the air equalizing pipe 11 and the connecting pipe 7.

[0065] Furthermore, the plowshare drying device includes a plurality of air inlets 12; one end of the plurality of air inlets 12 is respectively connected to one end of the connecting pipe 7 away from the first air storage tank 5, and the other ends of the plurality of air inlets 12 are respectively extended into the drying cylinder 1 and are connected to the interior of the gas equalizing pipe 11. Providing a plurality of air inlets 12 can effectively increase the speed of the mixed gas introduction and improve the uniformity of the mixed gas distribution in the drying chamber 2.

[0066] The operator can adjust the number of air inlets 12 according to actual needs.

[0067] Exemplarily, one end of the air inlet 12 is fixedly connected to the connecting pipe 7 by welding, and the other end of the air inlet 12 is fixedly connected to the air equalizing pipe 11 by welding.

[0068] In some embodiments, see Figure 1 and Figure 2The plowshare drying device further includes a dustproof net (high temperature resistant) 13, which is fixed in the air outlet 111. The dustproof net (high temperature resistant) 13 is used to prevent particles in the material from blocking the air outlet 111 during the drying process.

[0069] Exemplarily, the dustproof net (high temperature resistant) 13 can be fixed in the air outlet 111 by welding or clamping.

[0070] See also Figure 1 The plowshare drying device also includes an oxygen content detector 17; the oxygen content detector 17 is arranged on the drying cylinder 1, and the probe of the oxygen content detector 17 extends into the drying cylinder 1; the oxygen content detector 17 is used to detect the oxygen concentration in the drying chamber 2 in real time.

[0071] Furthermore, the oxygen content detector 17 is communicatively connected with the control unit; the data detected by the oxygen content detector 17 can be converted into an electrical signal and transmitted to the control unit, so that the control unit can adjust the opening of the first gas flow controller 8 and the opening of the second gas flow controller 9 respectively according to the received data.

[0072] The plowshare drying device further includes a vacuum tube 19 ; one end of the vacuum tube 19 is connected to the drying chamber 2 , and the other end is connected to the air extraction port of the vacuum pump 10 . The vacuum pump 10 can extract the gas in the drying chamber 2 through the vacuum tube 19 .

[0073] Furthermore, the plowshare drying device also includes a condenser 20 , an air inlet port of the condenser 20 is connected to an end of the vacuum tube 19 away from the drying cylinder 1 ; an air outlet port of the condenser 20 is connected to an exhaust port of the vacuum pump 10 .

[0074] Since the dried material has a certain amount of moisture, after the moisture enters the condenser 20 along with the gas, the condenser 20 can perform gas-liquid separation.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A plow blade drying device, characterized in that: include: A drying cylinder, a vacuum pump and a stirring assembly; the vacuum pump is connected to the drying cylinder; the stirring assembly includes a rotating shaft and a plurality of plowshares mounted on the rotating shaft; the rotating shaft is rotatably arranged in the drying cylinder; The plowshare drying equipment also includes a gas tank connected to the drying cylinder, and the gas tank includes a first gas tank and a second gas tank; wherein the first gas tank is used to store oxygen-containing gas; the second gas tank is used to store other gases different from the gas in the first gas tank, and a valve is provided on the pipeline connecting the gas tank and the drying cylinder to control the connection state between the first gas tank, the second gas tank and the drying cylinder.

2. The plowshare drying device according to claim 1, characterized in that: The plowshare drying equipment also includes a gas flow controller provided on a pipeline connecting the gas storage tank and the drying cylinder. The valve is located in the gas flow controller, and the gas flow controller is used to control the connection state between the first gas storage tank, the second gas storage tank and the drying cylinder.

3. The plowshare drying device according to claim 2, characterized in that: The gas flow controller comprises a first gas flow controller connected to the first gas storage tank and a second gas flow controller connected to the second gas storage tank.

4. The plowshare drying device according to claim 3, characterized in that: The plowshare drying device further comprises a control unit; the control unit is communicatively connected with the first gas flow controller and the second gas flow controller respectively.

5. The plowshare drying device according to claim 4, characterized in that: The plow drying equipment also includes a first control valve and a second control valve; the first control valve is arranged on a pipeline connecting the first gas flow controller and the drying cylinder; the second control valve is arranged on a pipeline connecting the second gas flow and the drying cylinder; the first control valve and the second control valve are respectively communicated with the control unit.

6. The plowshare drying device according to claim 1 or 2, characterized in that: At least one air inlet is provided on the pipeline communicating between the gas storage tank and the drying cylinder so that the gas in the gas storage tank can enter the drying cylinder.

7. The plowshare drying device according to claim 1 or 2, characterized in that: The plowshare drying equipment also includes an air equalizing pipe arranged in the drying cylinder; the air equalizing pipe is connected to the air inlet of the drying cylinder, and a plurality of air outlet holes are opened on the tube wall of the air equalizing pipe, and the plurality of air outlet holes are arranged at intervals along the axial direction of the air equalizing pipe.

8. The plowshare drying device according to claim 7, characterized in that: The plowshare drying device also includes a dustproof net; the dustproof net is fixed in the air outlet.

9. The plowshare drying device according to claim 1 or 2, characterized in that: The plowshare drying equipment further comprises a mixer; the mixer is arranged on a pipeline communicating between the gas storage tank and the drying cylinder.

10. The plowshare drying device according to claim 1 or 2, characterized in that: The plowshare drying equipment further comprises an oxygen content detector arranged on the drying cylinder.

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