Drying equipment for detecting and judging boiling drying end point on line

Abstract

The utility model provides drying equipment for detecting and judging a boiling drying end point on line, which comprises an air inlet system heating cabinet, an air inlet valve, an air inlet humidity detector, a boiling dryer stock bin, a pulse back-blowing dust removal system, an air exhaust valve, an air exhaust humidity detector, an induced draft fan and a fan air exhaust silencer, the air inlet system heating cabinet is connected with a boiling dryer bin through a pipeline, and an air inlet valve and an air inlet humidity detector are arranged at the upper end of the pipeline for connection; and a pulse back-blowing dust removal system is connected above the boiling dryer stock bin. According to the utility model, equipment is improved, so that energy and time can be saved, and the productivity can be improved within limited time; by improving the equipment, the inaccuracy of artificial experience is avoided, the cost of manual sampling detection is reduced, the particle yield is greatly improved, and the process reproducibility is enhanced while the stability of the product quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying equipment, in particular to a drying equipment for online detection and judgment of boiling drying end point. Background Art

[0002] In the production of oral solid dosage drugs or health products, the boiling drying process of solid particles is a key production process. The equipment used for particle drying is a boiling dryer, which is used to add the prepared wet particles into the boiling dryer. Turn on the induced draft fan and heater to allow the hot air to enter the equipment evenly and orderly. In the boiling dryer, the hot air and the wet particles have sufficient heat and mass exchange until the wet particles are completely dried to the qualified standard. Then enter the next process of mixing and tableting.

[0003] There are two problems when traditional fluidized bed dryers are used to dry materials:

[0004] 1. Since it is impossible to detect the drying status and moisture value of the material in a timely and accurate manner, it is often judged by the operator's experience. This often causes deviations in the final moisture content of the material, thus affecting the quality of the drug. In addition, for the sake of safety, the drying time is usually extended, which greatly increases the loss of fan power and steam heat energy, which is not conducive to reducing production costs.

[0005] 2. Since the traditional drying method does not have a scientific and effective means of timely online detection, the drying time is often extended to ensure that the drying moisture data meets the standard. The collision and friction caused by the long-term fluidization boiling of the dried particles will lead to an increase in the fine powder content. This will lead to a decrease in the yield of qualified particles, which is one of the reasons for the decline in production efficiency. Summary of the invention

[0006] In order to solve the above technical problems, the utility model provides a drying device for online detection and judgment of boiling drying endpoint. By improving the equipment during use, the production capacity is increased within a limited time, the cost of manual sampling and testing is reduced, and the stability of product quality is ensured.

[0007] A drying device for online detection and judgment of the end point of boiling drying comprises an air inlet system heating cabinet, an air inlet valve, an air inlet humidity detector, a boiling dryer silo, a pulse back-blowing dust removal system, an exhaust valve, an exhaust humidity detector, an induced draft fan and a fan exhaust silencer, wherein the air inlet system heating cabinet pipeline is connected to the boiling dryer silo and an air inlet valve and an air inlet humidity detector are respectively arranged at the upper end of the connected pipeline; the boiling dryer silo is connected with a pulse back-blowing dust removal system above; the upper end pipeline of the pulse back-blowing dust removal system is connected to the induced draft fan and an exhaust valve and an exhaust humidity detector are respectively arranged at the upper right side of the connected pipeline; the upper right side pipeline of the induced draft fan is connected to the fan exhaust silencer.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. In the present invention, by improving the equipment, energy saving and time saving can be achieved and the production capacity can be increased within a limited time.

[0010] 2. In the present invention, by improving the equipment, the inaccuracy of experience is eliminated, the cost of manual sampling and testing is reduced, the particle yield is greatly improved, the product quality is guaranteed to be stable, and the process reproducibility is enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] In the figure:

[0013] 1. Air intake system heating cabinet; 2. Air intake valve; 3. Air intake humidity detector; 4. Boiling dryer silo; 5. Pulse back-blow dust removal system; 6. Exhaust valve; 7. Exhaust humidity detector; 8. Induced draft fan; 9. Fan exhaust silencer. DETAILED DESCRIPTION

[0014] The utility model is described in detail below in conjunction with the accompanying drawings. Figure 1 As shown, a drying device for online detection and judgment of the end point of boiling drying comprises an air inlet system heating cabinet 1, an air inlet valve 2, an air inlet humidity detector 3, a boiling dryer silo 4, a pulse back-blowing dust removal system 5, an exhaust valve 6, an exhaust humidity detector 7, an induced draft fan 8 and a fan exhaust silencer 9, wherein the air inlet system heating cabinet 1 is connected to the boiling dryer silo 4 by a pipeline, and an air inlet valve 2 and an air inlet humidity detector 3 are respectively arranged at the upper end of the connected pipeline; the boiling dryer silo 4 is connected with a pulse back-blowing dust removal system 5 above; the upper end pipeline of the pulse back-blowing dust removal system 5 is connected to the induced draft fan 8, and the exhaust valve 6 and the exhaust humidity detector 7 are respectively arranged at the upper right side of the connected pipeline; the fan exhaust silencer 9 is connected to the upper right side pipeline of the induced draft fan 8.

[0015] How it works

[0016] In the utility model, the present invention adds an inlet air humidity detector 3 behind the heater 1 of the air inlet section of the boiling dryer for online detection of the inlet air humidity value, and adds an exhaust air humidity detector 7 after the exhaust valve 6 for online detection of the exhaust air humidity value. When the boiling dryer is in operation, the control system is turned on first, at which time the induced draft fan 8 opens the induced air, the inlet valve 2 opens the exhaust valve 6 and the fan induced air draws the inside of the boiling dryer host into a negative pressure. Then the wet particles are vacuum-sucked into the boiling dryer silo 4, and the inlet air heating system 1 continuously heats the inlet air temperature until the system set value during the process of sucking the material. The boiling dryer continues to dry the material at a standard atmospheric pressure according to the established air volume, air pressure and temperature, and the moisture in the wet particles is constantly evaporating. Until the inlet air humidity detector 3 and the exhaust air humidity detector 7 detect the same moisture value online, it can be judged as the drying end point, and the drying is completed, the inlet air heating system 1 stops heating, and the cold air is introduced to cool the material to room temperature. The induced draft fan 8 stops induced air, the air inlet valve 2 and the exhaust valve 6 are closed, and the dried material enters the next process (mixing, tableting).

[0017] During the fluidized bed drying process, the humidity of the heated inlet air is displayed by the inlet air humidity detector 3 as the drying standard humidity. Then, during the drying process, the exhaust air humidity detector 7 is used to detect the gas discharged from the inside of the fluidized bed dryer silo 4. The data detected by the exhaust air humidity detector 7 is compared with the data detected by the inlet air humidity detector 3. When the exhaust air humidity detector 7 is greater than the inlet air humidity detector 3, the material humidity is too high. When the data of the exhaust air humidity detector 7 and the inlet air humidity detector 3 are the same, the material drying humidity is reached, thereby completing the drying work.

[0018] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A drying device for online detection and determination of boiling drying end point, characterized in that: The drying equipment for online detection and judgment of the end point of fluidized bed drying comprises an air intake system heating cabinet (1), an air intake valve (2), an air intake humidity detector (3), a fluidized bed drying machine silo (4), a pulse back-blowing dust removal system (5), an exhaust valve (6), an exhaust humidity detector (7), an induced draft fan (8) and a fan exhaust silencer (9), wherein the air intake system heating cabinet (1) is connected to the fluidized bed drying machine silo (4) through a pipeline; the upper part of the fluidized bed drying machine silo (4) is connected to the pulse back-blowing dust removal system (5); the upper end pipeline of the pulse back-blowing dust removal system (5) is connected to the induced draft fan (8); and the upper right end pipeline of the induced draft fan (8) is connected to the fan exhaust silencer (9).

2. The drying device for online detection and judgment of boiling drying end point according to claim 1 is characterized in that: An air inlet valve (2) is provided on the left side of the upper end of the pipeline between the air inlet system heating cabinet (1) and the boiling dryer silo (4).

3. The drying device for online detection and judgment of boiling drying end point according to claim 1 is characterized in that: An air intake humidity detector (3) is provided on the right side of the upper end of the pipeline between the air intake system heating cabinet (1) and the boiling dryer silo (4).

4. The drying device for online detection and judgment of boiling drying end point according to claim 1 is characterized in that: An exhaust valve (6) is provided on the right side of the pipeline provided between the pulse back-blowing dust removal system (5) and the induced draft fan (8).

5. The drying device for online detection and judgment of boiling drying end point according to claim 1 is characterized in that: An exhaust air humidity detector (7) is provided on the right side of the upper end of the pipeline provided between the pulse back-blowing dust removal system (5) and the induced draft fan (8).

6. The drying device for online detection and judgment of boiling drying end point as claimed in claim 4 or 5, characterized in that: The exhaust air humidity detector (7) is arranged on the left side of the exhaust air valve (6).

7. The drying device for online detection and judgment of boiling drying end point according to claim 1, characterized in that: The drying end point is reached when the moisture values ​​detected online by the inlet air humidity detector (3) and the exhaust air humidity detector (7) are consistent.

8. The drying device for online detection and judgment of boiling drying end point according to claim 1, characterized in that: The data detected by the exhaust humidity detector (7) is compared with the data detected by the inlet humidity detector (3). When the data of the exhaust humidity detector (7) is greater than that of the inlet humidity detector (3), the material humidity is too high. When the data of the exhaust humidity detector (7) and the inlet humidity detector (3) are the same, the material humidity is dry.

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