Cross-flow type and fluidized state dual-purpose low-temperature drying experiment device

Abstract

The utility model discloses a through-flow type and fluidized state dual-purpose low-temperature drying experiment device which comprises an air heater, a drying chamber, a material bin located in the drying chamber, a weighing lever, an electronic balance and a computer electrically connected with the electronic balance. The other end of the weighing lever is connected with a weight through a string, the weight is placed on an electronic balance for weighing, and a computer records the weighing result of the electronic balance; a plurality of through holes are formed in the surface of the material bin and used for allowing airflow in the drying chamber to pass through. The drying chamber comprises an upper opening and a lower opening, and the hot-air blower is connected with the upper opening and the lower opening, so that the through-flow type and fluidized state dual-purpose low-temperature drying experimental device is switched between through-flow type drying and fluidized state drying. The through-flow type and fluidized state dual-purpose low-temperature drying experiment device can be used for respectively measuring drying curves of materials in a through-flow type drying mode and a fluidized state drying mode.

Description

Technical Field

[0001] The utility model relates to the field of low-temperature drying, and in particular to a low-temperature drying experimental device which can be used in both a through-flow and fluidized state. Background Art

[0002] The low-temperature drying experimental device can test the drying curve of a certain material and determine the time required for the material to dry to a certain degree, so as to understand the low-temperature drying characteristics of the material. Therefore, the drying curve of the material can be used as basic data to develop industrial drying equipment.

[0003] The existing low-temperature drying experimental device piles the material on the experimental sample, uses an electronic balance to monitor the weight of the experimental sample in real time, and records the change of material weight over time, so as to derive the low-temperature drying curve of the material.

[0004] However, the contact form between the stacked material and the airflow can only reflect the through-flow drying situation. When fluidizing the material, the airflow needs to be blown in from the porous plate at the bottom of the material. The material is in a boiling state under the action of the airflow, and the material is dried in the process. The current stacked state experimental method cannot complete the simulation of the sulfide state drying process. Utility Model Content

[0005] The utility model aims to provide a through-flow and fluidized state dual-purpose low-temperature drying experimental device, which can respectively measure the drying curves of materials in the two drying modes of through-flow and fluidized state.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a through-flow and fluidized state dual-purpose low-temperature drying experimental device, which comprises a hot air blower, a drying chamber, a material bin located in the drying chamber, a weighing lever, an electronic balance and a computer electrically connected to the electronic balance, wherein the material bin is connected to one end of the weighing lever by a thin rope, the other end of the weighing lever is connected to a weight by a thin rope, the weight is placed on the electronic balance for weighing, and the computer records the weighing result of the electronic balance;

[0007] The surface of the material bin is provided with a plurality of through holes for the air flow in the drying chamber to pass through;

[0008] The drying chamber comprises an upper opening and a lower opening, and the hot air blower is respectively connected to the upper opening and the lower opening to enable the through-flow and fluidized-state dual-purpose low-temperature drying experimental device to switch between through-flow drying and fluidized-state drying.

[0009] Preferably, the material bin is suspended in the drying chamber under the action of the thin rope.

[0010] Preferably, a through hole is provided at the center of the top of the drying chamber, and the connection between the weighing lever and the thin rope close to one end of the drying chamber is located directly above the through hole.

[0011] Preferably, an upper limit and a lower limit are provided in the drying chamber, and the material bin is located between the upper limit and the lower limit.

[0012] Preferably, the lengths of the thin ropes from the rotation fulcrum of the weighing lever to both ends are the same.

[0013] Preferably, the temperature of the hot air blown out by the hot air blower is not higher than 120°.

[0014] Preferably, the weight of the weight is greater than the sum of the deadweight of the material bin and the weight of the material in the material bin.

[0015] Preferably, the upper opening and the lower opening are both provided with quick connectors, and the quick connectors can cooperate with the hot air blower.

[0016] According to the above technical scheme, the two ends of the weighing lever of the utility model are connected to the material bin and the weight by a thin rope, and the electronic balance lifts the weight and weighs the weight, so that the weighing lever is in a horizontal state. During the use of the through-flow and fluidized state dual-purpose low-temperature drying experimental device, the hot air blown out by the hot air blower enters the drying chamber to dry the material in the material bin. The mass of the dried material is reduced, and the reading of the electronic balance also increases accordingly. At this time, the reading change of the electronic balance is recorded, and according to the force arm relationship on both sides of the weighing lever, the mass of the material reduced after drying can be calculated. The electronic balance is electrically connected to the computer, so that the computer can synchronously record the weighing of the electronic balance to achieve real-time monitoring of the material drying situation.

[0017] However, in actual use, when the hot air blower is working, the hot air flow in the drying room will affect the weighing result of the electronic balance. Therefore, the hot air blower needs to be set to start and stop at a scheduled time. The hot air blower can be set to stop for 30 seconds after working for 10 to 30 minutes. During the drying process of the hot air blower, the moisture in the material is lost and the mass of the material is reduced. When the hot air blower stops working, the material in the material bin falls to the bottom of the material bin and the system tends to be stable. At this time, the weighing result of the electronic balance is recorded and compared with the weighing result before the hot air blower started working. The difference obtained can be combined with the force arm relationship on both sides of the weighing lever to solve the change in material mass.

[0018] When cross-flow drying is adopted, the hot air blower of the cross-flow and fluidized state dual-purpose low-temperature drying experimental device is connected to the upper opening, and the hot air enters the drying chamber through the upper opening, and then blows into the material bin to dry the material therein.

[0019] When fluidized state drying is adopted, the hot air blower of the dual-purpose low-temperature drying experimental device of through-flow and fluidized state is connected to the lower opening, and the hot air enters the drying chamber through the lower opening, and then is blown into the material bin through the through hole at the bottom of the material bin. Under the action of the hot air, the material in the material bin will be dispersed in the material bin and be in a state similar to boiling. In this state, the hot air in the drying chamber can dry the material.

[0020] Therefore, the use of this dual-purpose low-temperature drying experimental device for through-flow and fluidized state can simultaneously realize through-flow drying and fluidized state drying, and record the drying conditions of the materials in the process.

[0021] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of a dual-purpose low-temperature drying experimental device of cross-flow and fluidized state when it is in fluidized state drying;

[0024] Figure 2 It is a schematic diagram of a low-temperature drying experimental device for both cross-flow and fluidized state when it is in cross-flow drying.

[0025] Description of Reference Numerals

[0026] 1 hot air blower 2 drying room

[0027] 3Material bin 4Weighing lever

[0028] 5Electronic balance 6Computer

[0029] 7 thin ropes 8 weights

[0030] 21 Upper opening 22 Lower opening

[0031] 23 upper limit 24 lower limit

[0032] 41 rotating fulcrum 25 quick connector DETAILED DESCRIPTION

[0033] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0034] In the present utility model, unless otherwise stated, directional words contained in terms such as "inside, bottom, top, lower part, center position, directly above," etc. merely represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0035] See also Figure 1-2 The present invention discloses a dual-purpose low-temperature drying experimental device for flow-through and fluidized state, which comprises a hot air blower 1, a drying chamber 2, a material bin 3 located in the drying chamber 2, a weighing lever 4, an electronic balance 5 and a computer 6 electrically connected to the electronic balance 5, wherein the material bin 3 is connected to one end of the weighing lever 4 through a thin rope 7, and the other end of the weighing lever 4 is connected to a weight 8 through the thin rope 7, and the weight 8 is placed on the electronic balance 5 for weighing, and the computer 6 records the weighing result of the electronic balance 5;

[0036] The surface of the material bin 3 is provided with a plurality of through holes for the airflow in the drying chamber 2 to pass through;

[0037] The drying chamber 2 includes an upper opening 21 and a lower opening 22, and the hot air blower 1 is respectively connected to the upper opening 21 and the lower opening 22 to realize switching between the through-flow drying and fluidized drying of the dual-purpose low-temperature drying experimental device.

[0038] Through the implementation of the above technical solution, the two ends of the weighing lever 4 are connected to the material bin 3 and the weight 8 by a thin rope, and the electronic balance 5 lifts the weight 8 and weighs the weight, so that the weighing lever 4 is in a horizontal state. During the use of the dual-purpose low-temperature drying experimental device of the through-flow and fluidized state, the hot air blown by the hot air blower 1 enters the drying chamber 2 to dry the material in the material bin 3. The mass of the dried material is reduced, and the reading of the electronic balance 5 increases accordingly. At this time, the reading change of the electronic balance 5 is recorded, and according to the force arm relationship on both sides of the weighing lever 4, the mass of the material reduced after drying can be calculated. The electronic balance 5 is electrically connected to the computer 6, so that the computer 6 can synchronously record the weighing of the electronic balance 5, and realize real-time monitoring of the material drying situation.

[0039] However, in actual use, when the hot air blower 1 is working, the hot air flow in the drying chamber 2 will affect the weighing result of the electronic balance 5. Therefore, the hot air blower 1 needs to be set to start and stop at a scheduled time. Preferably, the hot air blower 1 can be set to stop for 30 seconds after working for 10 to 30 minutes. During the drying process of the hot air blower 1, the moisture in the material is lost and the mass of the material is reduced. When the hot air blower 1 stops working, the material in the material bin 3 falls to the bottom of the material bin 3, and the system tends to be stable. At this time, the weighing result of the electronic balance 5 is recorded and compared with the weighing result before the hot air blower 1 started. The difference obtained can be combined with the force arm relationship on both sides of the weighing lever 4 to solve the change in material mass.

[0040] When through-flow drying is adopted, the hot air blower 1 is connected to the upper opening 21, and the hot air enters the drying chamber 2 through the upper opening 21, and then blows into the material bin 3 to dry the material therein.

[0041] When fluidized state drying is adopted, the hot air blower 1 is connected to the lower opening 22, and the hot air enters the drying chamber 2 through the lower opening 22, and then is blown into the material bin 3 through the through hole at the bottom of the material bin 3. Under the action of the hot air, the material in the material bin 3 will be dispersed in the material bin 3 and be in a state similar to boiling. In this state, the hot air in the drying chamber 2 can dry the material.

[0042] Regardless of which drying method is used, the measurement needs to be started when the hot air blower 1 stops working to avoid the influence of the hot air flow in the drying chamber 2 on the measurement result.

[0043] The working time of the hot air blower 1 can be determined according to the accuracy requirement of the material drying curve to be measured. If the time interval required by the horizontal axis in the drying curve is smaller, then the accuracy requirement of the drying curve is higher, and the working time of the hot air blower 1 can be set shorter. Otherwise, the working time of the hot air blower 1 can be set longer.

[0044] Therefore, the use of this dual-purpose low-temperature drying experimental device for through-flow and fluidized state can simultaneously realize through-flow drying and fluidized state drying, and record the drying conditions of the materials in the process.

[0045] In this embodiment, preferably, the material bin 3 is suspended in the drying chamber 2 by the action of the thin rope 7 .

[0046] The material bin 3 is suspended in the drying chamber 2 by the thin rope 7 to avoid friction between the material bin 3 and the inner wall of the drying chamber 2, thereby improving the accuracy of the measurement results of the through-flow and fluidized state dual-purpose low-temperature drying experimental device.

[0047] Preferably, the connection between the weighing lever 4 and the thin rope 7 is located on the center line of the drying chamber 2, so that the position of the thin rope 7 after being straightened coincides with the center line of the drying chamber 2, and the material bin 3 is less likely to rub against the inner wall of the drying chamber 2 during use.

[0048] In this embodiment, preferably, a through hole is provided at the center of the top of the drying chamber 2, and the connection between the weighing lever 4 and the thin rope 7 near one end of the drying chamber 2 is located directly above the through hole.

[0049] Under the action of the deadweight of the material bin 3, the thin rope 7 will be in a pulled state, and the connection between the weighing lever 4 near one end of the drying chamber 2 and the thin rope 7 is located directly above the through hole, which can avoid contact between the thin rope 7 and the through hole, thereby avoiding friction between the thin rope 7 and the through hole, making the measurement results of the dual-purpose low-temperature drying experimental device of through-flow and fluidized state more accurate.

[0050] In this embodiment, preferably, an upper limit position 23 and a lower limit position 24 are provided in the drying chamber 2 , and the material bin 3 is located between the upper limit position 23 and the lower limit position 24 .

[0051] During the hot air blowing in the drying chamber 2, the material bin 3 may be caused to move violently in the drying chamber 2. In order to avoid damage to the thin rope 7 caused by the violent movement of the material bin 3, an upper limit 23 and a lower limit 24 are set in the drying chamber 2 to limit the movement range of the material bin 3.

[0052] In this embodiment, preferably, the distances from the rotation fulcrum 41 of the weighing lever 4 to the thin ropes 7 at both ends are the same.

[0053] By setting the distances from the rotating fulcrum 41 to the thin ropes 7 at both ends to be the same, the material bin 3 and the weight 8 obtain the same lever arm. Then, during use, the mass change value of the electronic balance 5 is the mass value of the material drying loss, which facilitates calculation.

[0054] In this embodiment, preferably, the temperature of the hot air blown out by the hot air blower 1 is not higher than 120°.

[0055] In this embodiment, preferably, the weight of the weight 8 is greater than the sum of the weight of the material bin 3 and the weight of the material in the material bin 3 .

[0056] In order to ensure that the weighing lever 4 always remains horizontal, the weight 8 must always maintain pressure on the electronic balance 5 so that the thin rope 7 connected to the weight 8 remains taut and the position remains unchanged.

[0057] In this embodiment, preferably, both the upper opening 21 and the lower opening 22 are provided with a quick connector 25 , and the quick connector 25 can cooperate with the hot air blower 1 .

[0058] The quick connector 25 can realize the rapid switching of the drying state of the dual-purpose low-temperature drying experimental device of through-flow and fluidization state.

[0059] In one implementation mode, the quick connector 25 is configured to be cylindrical, and when it is required to cooperate with the hot air blower 1 , the quick connector 25 can be inserted into the air outlet of the hot air blower 1 .

[0060] Another implementation is that the quick connector 25 is configured as a flange, and the air outlet of the hot air blower 1 is also configured as a flange. The two flanges can be connected by bolts, or a snap-on connection can be achieved by providing a snap-on connection on one of the flanges.

[0061] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0063] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A low-temperature drying experimental device for both cross-flow and fluidized state, characterized in that: The through-flow and fluidized state dual-purpose low-temperature drying experimental device comprises a hot air blower (1), a drying chamber (2), a material bin (3) located in the drying chamber (2), a weighing lever (4), an electronic balance (5), and a computer (6) electrically connected to the electronic balance (5); the material bin (3) is connected to one end of the weighing lever (4) via a thin rope (7); the other end of the weighing lever (4) is connected to a weight (8) via the thin rope (7); the weight (8) is placed on the electronic balance (5) for weighing; and the computer (6) records the weighing result of the electronic balance (5); The surface of the material bin (3) is provided with a plurality of through holes for the airflow in the drying chamber (2) to pass through; The drying chamber (2) comprises an upper opening (21) and a lower opening (22), and the hot air blower (1) is respectively connected to the upper opening (21) and the lower opening (22) to enable the through-flow and fluidized state dual-purpose low-temperature drying experimental device to switch between through-flow drying and fluidized state drying.

2. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 1 is characterized in that: The material bin (3) is suspended in the drying chamber (2) under the action of the thin rope (7).

3. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 2 is characterized in that: A through hole is provided at the center of the top of the drying chamber (2), and the connection between the weighing lever (4) and the thin rope (7) close to one end of the drying chamber (2) is located directly above the through hole.

4. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 3 is characterized in that: An upper limit position (23) and a lower limit position (24) are provided in the drying chamber (2), and the material bin (3) is located between the upper limit position (23) and the lower limit position (24).

5. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 4 is characterized in that: The distances from the rotation fulcrum (41) of the weighing lever (4) to the thin ropes (7) at both ends of the weighing lever (4) are equal.

6. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 1 is characterized in that: The temperature of the hot air blown out by the hot air blower (1) is not higher than 120°.

7. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 1 is characterized in that: The weight of the weight (8) is greater than the sum of the weight of the material bin (3) and the weight of the material in the material bin (3).

8. The through-flow and fluidized state dual-purpose low-temperature drying experimental device according to claim 1 is characterized in that: The upper opening (21) and the lower opening (22) are both provided with a quick connector (25), and the quick connector (25) can cooperate with the hot air blower (1).

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