Hot air circulating type mineral medicine calcining device

Abstract

The utility model belongs to mineral medicinal material processing technical field, concretely is a kind of hot air circulation type mineral medicine calcining device, including shell, calcining box and heater, further include: hot air circulation mechanism, hot air circulation mechanism includes fan, and the output of fan is communicated with the air distribution chamber of being arranged in calcining box by air supply pipe, and the input of fan is communicated with the calcining chamber of being arranged in calcining box by air intake pipe;Heat exchanger is fixedly connected with the outer wall of shell, waste gas inlet pipe, one end is communicated with air supply pipe, the other end is communicated with the waste gas passage in heat exchanger;Fresh air outlet pipe, one end is communicated with air intake pipe, the other end is communicated with the fresh air passage in heat exchanger;The utility model is formed circulation by hot air circulation mechanism and high-temperature hot air is led out again and sent into calcining box, reduces the direct emission loss of heat, simultaneously, by high-temperature waste gas preheats outside fresh air, realizes waste heat reuse, further reduces energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of mineral medicinal material processing technology, and in particular relates to a hot air circulating mineral medicinal material calcination device. Background Technology

[0002] Mineral medicines refer to a category of traditional Chinese medicines that are made from inorganic substances such as minerals, rocks, or fossils collected from nature and processed for medical purposes. Calcination is one of the core processes in the processing of mineral-based traditional Chinese medicines. By treating the medicines at high temperatures, the physicochemical properties of the medicinal materials are changed, thereby optimizing the efficacy, reducing toxicity, or producing new therapeutic effects.

[0003] Currently, most existing calcination devices use single heating or natural convection. After the heating source is centrally supplied, the heat is diffused by natural air flow, which can easily lead to an imbalance in the temperature distribution in the calcination chamber, resulting in uneven calcination of medicinal materials and affecting the calcination quality. Furthermore, the flue gas generated by high-temperature calcination is discharged directly from the calcination device without being recovered, which not only wastes energy but may also cause fluctuations in the calcination environment temperature due to the loss of high-temperature flue gas.

[0004] To address the aforementioned problems, this application proposes a hot air circulating mineral calcination device. Utility Model Content

[0005] The purpose of this invention is to provide a hot air circulating mineral calcination device that solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a hot air circulating mineral calcination device, comprising a shell, a calcination chamber, and a heater, and further comprising:

[0008] A hot air circulation mechanism, comprising a fan, wherein the output end of the fan is connected to the air distribution chamber provided in the calcining box through an air supply pipe, and the input end of the fan is connected to the calcining chamber provided in the calcining box through an air exhaust pipe.

[0009] The heat exchanger is fixedly connected to the outer wall of the shell, and the heat exchanger has parallel, non-communicating fresh air passages and exhaust gas passages arranged in parallel.

[0010] The exhaust gas inlet pipe is connected to the air supply pipe at one end and to the exhaust gas passage inside the heat exchanger at the other end. The exhaust gas passage of the heat exchanger is also connected to the exhaust gas outlet pipe.

[0011] The fresh air outlet pipe is connected at one end to the exhaust pipe and at the other end to the fresh air channel inside the heat exchanger. The fresh air channel of the heat exchanger is also connected to the fresh air inlet pipe.

[0012] Furthermore, a uniform air distribution plate is fixedly installed inside the calcination chamber, and the uniform air distribution plate is located between the calcination chamber and the air distribution chamber, and the uniform air distribution plate is provided with ventilation holes.

[0013] Furthermore, one-way adjustable dampers are installed on the exhaust gas inlet pipe and the fresh air outlet pipe respectively.

[0014] Furthermore, the heater is an electric heater, and the heater is embedded in the side wall of the calcining box.

[0015] Furthermore, a fixed frame is fixed inside the calcination box, and the fixed frame has a multi-layer structure, with a material tray in each layer of the fixed frame.

[0016] Furthermore, the tray has through holes for airflow.

[0017] Furthermore, a gap is left between the outer wall of the fixing frame and the side of the calcination chamber.

[0018] Furthermore, an insulation layer is fixed between the outer shell and the calcining box.

[0019] This utility model has the following beneficial effects:

[0020] This invention uses a fan in a hot air circulation mechanism to draw out high-temperature exhaust gas from the calcination chamber through an exhaust pipe and then send it back through an exhaust pipe, forming a hot air circulation path. This avoids the heat waste caused by the direct emission of high-temperature flue gas in traditional devices and reduces energy consumption.

[0021] This invention uses a heat exchanger to exchange heat between the introduced cold outside air and the discharged high-temperature waste gas. The preheated fresh air is then replenished to the circulation system through the fresh air outlet pipe, realizing the recovery and utilization of the discharged waste heat energy and further reducing energy consumption.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of this utility model from another perspective;

[0026] Figure 3 This is a cross-sectional view of the outer shell and a schematic diagram of its internal structure of the present invention;

[0027] Figure 4 This is a cross-sectional view of the calcination box of this utility model and a schematic diagram of its internal structure.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] In the diagram: 1. Outer shell; 2. Insulation layer; 3. Calcination box; 301. Calcination chamber; 302. Air distribution chamber; 4. Heater; 5. Fan; 501. Exhaust duct; 502. Supply duct; 6. Heat exchanger; 7. Exhaust gas inlet pipe; 8. Exhaust gas outlet pipe; 9. Fresh air inlet pipe; 10. Fresh air outlet pipe; 11. Fixing frame; 12. Material tray; 13. Air distribution plate. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Please see Figures 1 to 4 As shown, this utility model is a hot air circulating mineral calcination device, including a shell 1, a calcination box 3, and a heater 4. It also includes: a hot air circulation mechanism, which includes a fan 5, the output end of which is connected to the air distribution chamber 302 inside the calcination box 3 via an air supply pipe 502, and the input end of which is connected to the calcination chamber 301 inside the calcination box 3 via an exhaust pipe 501; a heat exchanger 6, fixedly connected to the outer wall of the shell 1, with parallel, non-communicating fresh air channels and exhaust gas channels inside the heat exchanger 6; an exhaust gas inlet pipe 7, one end of which is connected to the air supply pipe 502, and the other end of which is connected to the exhaust gas channel inside the heat exchanger 6, the exhaust gas channel of the heat exchanger 6 also being connected to the exhaust gas outlet pipe 8; and a fresh air outlet pipe 10, one end of which is connected to the exhaust pipe 501, and the other end of which is connected to the fresh air channel inside the heat exchanger 6, the fresh air channel of the heat exchanger 6 also being connected to the fresh air inlet pipe 9.

[0033] This embodiment provides a hot air circulation type mineral drug calcination device. The hot air circulation mechanism is driven by a fan 5 to draw out the high-temperature waste gas in the calcination chamber 301 through the induced draft pipe 501 and then send it into the air distribution chamber 302 through the air supply pipe 502 to form a hot air circulation, reducing heat loss. The waste gas channel and the fresh air channel are separated by a heat-conducting wall. A portion of the high-temperature waste gas in the air supply pipe 502 enters the waste gas channel of the heat exchanger 6. Outside air enters through the fresh air inlet pipe 9 to exchange heat with the hot air in the waste gas channel. The preheated fresh air is sent into the induced draft pipe 501 through the fresh air outlet pipe 10 to participate in the circulation. The waste gas outlet pipe 8 is connected to the waste gas treatment device, and the cooled waste gas is discharged into the waste gas treatment device through the waste gas outlet pipe 8.

[0034] The calcining chamber 3 is equipped with a uniform air distribution plate 13, which is located between the calcining chamber 301 and the air distribution chamber 302. The uniform air distribution plate 13 has ventilation holes. After the gas enters the air distribution chamber 302 through the air supply pipe 502, the ventilation holes of the uniform air distribution plate 13 can make the hot air in the air distribution chamber 302 evenly diffuse to the calcining chamber 301, avoiding local airflow concentration or dead zones.

[0035] One-way adjustable dampers are installed on the exhaust gas inlet pipe 7 and the fresh air outlet pipe 10 respectively. The exhaust gas discharge volume and the fresh air intake volume can be flexibly adjusted through the one-way adjustable dampers to adapt to the heat demand of different calcination stages. The one-way adjustable damper can be an integrated valve with both adjustment and check functions, or it can be a combination component composed of an adjustment damper and a check valve connected in series to control the unidirectional flow of air and adjust its flow rate.

[0036] Among them, heater 4 is an electric heater, and heater 4 is embedded in the side wall of calcination box 3. Heater 4 directly heats calcination chamber 301, and the heating rate is fast.

[0037] The calcination chamber 3 is equipped with a fixed frame 11, which has a multi-layer structure. Each layer of the fixed frame 11 is equipped with a material tray 12, which has through holes for airflow. There is a gap between the outer wall of the fixed frame 11 and the side of the calcination chamber 301. The gap between the outer wall of the fixed frame 11 and the side of the calcination chamber 301 ensures unobstructed airflow. Hot air can pass vertically through the medicinal material layer with through holes in the material tray 12, improving heat exchange efficiency. The multi-layer structure increases the calcination area per unit volume, improving equipment capacity. The diameter of the through holes in the material tray 12 is much smaller than the diameter of the ventilation holes in the air distribution plate 13, and the material tray 12 intercepts medicinal material fragments.

[0038] Among them, a heat insulation layer 2 is fixed between the outer shell 1 and the calcining box 3. The heat insulation layer 2 can be made of heat insulation materials such as rock wool or aluminum silicate fiber to reduce the heat dissipation of the calcining box to the outside and further improve the heat energy utilization rate.

[0039] Preferably, the outer walls of the exhaust gas inlet pipe 7 and the fresh air outlet pipe 10 can be wrapped with thermal insulation cotton to reduce heat loss.

[0040] It is understandable that this utility model uses a hot air circulation mechanism to draw out high-temperature hot air and send it back into the calcination box 3 to form a circulation, thereby reducing direct heat loss. At the same time, it uses high-temperature waste gas to preheat the outside fresh air, thereby realizing the reuse of waste heat and further reducing energy consumption.

[0041] A specific application of the operation process in this embodiment is as follows: The medicinal materials are spread flat on the material tray, the heater 4 is started to raise the temperature in the calcination box 3, the fan 5 is started, and the high-temperature exhaust gas in the calcination chamber 301 is drawn out through the exhaust pipe 501 and returned to the air distribution chamber 302 through the air supply pipe 502 under the action of the fan 5. After the high-temperature gas enters the air supply pipe 502, some of the gas enters the exhaust gas channel in the heat exchanger 6 through the exhaust gas inlet pipe 7. At the same time, when the fan 5 is working, it creates a negative pressure in the fresh air outlet pipe 10, so that the outside fresh air enters the fresh air channel of the heat exchanger 6 through the fresh air inlet pipe 9. The fresh air and the high-temperature exhaust gas exchange heat in the heat exchanger 6. The preheated fresh air enters the exhaust pipe 501 through the fresh air outlet pipe 10, and then enters the air distribution chamber 302 through the air supply pipe 502 with the gas in the exhaust pipe 501.

[0042] The gas in the air distribution chamber 302 is evenly blown into the calcination chamber 301 through the air holes of the air distribution plate 13, and then passes through the through holes of the material tray 12 to fully contact the medicinal materials, thus completing the calcination process.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A hot air circulating mineral calcination device, comprising a shell (1), a calcination chamber (3), and a heater (4), characterized in that, Also includes: Hot air circulation mechanism, the hot air circulation mechanism includes a fan (5), and the output end of the fan (5) is connected to the air distribution chamber (302) provided in the calcining box (3) through the air supply pipe (502), and the input end of the fan (5) is connected to the calcining chamber (301) provided in the calcining box (3) through the air duct (501); The heat exchanger (6) is fixed to the outer wall of the shell (1), and the heat exchanger (6) has a fresh air passage and an exhaust gas passage that are not connected to each other in parallel. The exhaust gas inlet pipe (7) is connected at one end to the air supply pipe (502) and at the other end to the exhaust gas passage inside the heat exchanger (6). The exhaust gas passage of the heat exchanger (6) is also connected to the exhaust gas outlet pipe (8). The fresh air outlet pipe (10) is connected at one end to the air duct (501) and at the other end to the fresh air channel inside the heat exchanger (6). The fresh air channel of the heat exchanger (6) is also connected to the fresh air inlet pipe (9).

2. The hot air circulating mineral calcination device according to claim 1, characterized in that: The calcination box (3) is fixedly provided with an air distribution plate (13), and the air distribution plate (13) is located between the calcination chamber (301) and the air distribution chamber (302). The air distribution plate (13) is provided with ventilation holes.

3. The hot air circulating mineral calcination device according to claim 1, characterized in that: One-way adjustable dampers are installed on the exhaust gas inlet pipe (7) and the fresh air outlet pipe (10).

4. The hot air circulating mineral calcination device according to claim 1, characterized in that: The heater (4) is an electric heater, and the heater (4) is embedded in the side wall of the calcining box (3).

5. A hot air circulating mineral calcination device according to claim 1, characterized in that: The calcining box (3) is equipped with a fixed frame (11), and the fixed frame (11) has a multi-layer structure, with a material tray (12) in each layer of the fixed frame (11).

6. A hot air circulating mineral calcination device according to claim 5, characterized in that: The tray (12) has a through hole for airflow.

7. A hot air circulating mineral calcination device according to claim 5, characterized in that: A gap is left between the outer wall of the fixing frame (11) and the side of the calcination chamber (301).

8. The hot air circulating mineral calcination device according to claim 1, characterized in that: A heat insulation layer (2) is fixed between the outer shell (1) and the calcining box (3).

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