Blowing device for drying of hazardous waste mud drying machine

Abstract

The utility model relates to the technical field of sludge treatment, and discloses an air blowing device for drying of a hazardous waste sludge drying machine, which comprises a supporting seat, an outer cylinder mounted on the supporting seat and a drying cylinder rotatably mounted in the outer cylinder, a heat energy recovery mechanism is mounted on the outer wall of the outer cylinder, and hot air is introduced into the outer cylinder to heat the drying cylinder. After the sludge is dried, hot air is pumped out of the outer barrel through a third pipeline, filtered and heated and then fed into the position between the outer barrel and the drying barrel again, cyclic utilization of heat energy is achieved, and waste of the heat energy is reduced; the hot air is prevented from being directly discharged into the external environment, and the clean air is discharged to the outside after being filtered by a plurality of filter plates in the filter assembly, so that the pollution to the environment is reduced; the air outlet nozzles which are uniformly distributed on the heat branch pipes can uniformly blow hot air to the drying cylinder, so that the sludge is uniformly heated, and the drying effect on the sludge is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, and particularly relates to a blowing device for drying a hazardous waste sludge dryer. Background Technique

[0002] Sludge treatment is a complex process of reducing, stabilizing and harmlessly treating sludge. An important task in sludge treatment is sludge dewatering, which removes the water in the sludge through technologies such as pressure filtration, centrifugation or mechanical dewatering to reduce the volume and weight of the sludge.

[0003] After retrieval, a patent with the application number CN202011375235.0 discloses a chemical sludge drying device, including a drying box, a first motor, a rotating shaft, stirring rods and a blower. The rotating shaft is arranged in the drying box, and several stirring rods are arranged and evenly distributed on the rotating shaft. The end of the rotating shaft is connected to the first motor. The blower is connected to the tail of the rotating shaft through an air inlet pipe. Several exhaust holes are arranged on the stirring rods. The rotating shaft is of a hollow structure and is communicated with the stirring rods. A rotating cylinder is arranged in the drying box. The tail of the rotating cylinder is hinged to the drying box and is driven by a second motor at the end. A blowing pipe is wound around the outside of the rotating cylinder, and the tail of the blowing pipe is connected to the air inlet pipe. A feeding port is arranged at the upper part of the rotating cylinder, and a discharging port is arranged at the lower part. A sandwich is arranged on the inner wall of the drying box. An inlet for water is arranged at the upper part of the sandwich, and an outlet for water is arranged at the lower part. Valves are arranged on both the discharging port and the outlet for water. This device realizes the rapid drying of chemical sludge through double-layer blowing and the cooperation of the rotation of the rotating cylinder, has high drying efficiency, good safety performance, high drying uniformity, and avoids polluting the chemical sludge.

[0004] The drying of sludge mostly adopts the method of blowing hot air to take away the water in the sludge. However, there are few mechanisms for recovering heat energy in the current sludge drying devices, resulting in a large amount of heat energy escaping and wasting of heat energy; and the heat energy used for drying sludge will be directly discharged to the outside, causing environmental pollution; and the structural distribution of the hot air pipes in the current sludge drying devices is not reasonable enough, resulting in uneven hot air blowing on the sludge and reducing the drying effect on the sludge. Therefore, we need to propose a blowing device for drying a hazardous waste sludge dryer. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a blowing device for drying hazardous waste sludge dryer. Through the design of installing a heat energy recovery mechanism above the drying cylinder, hot air is introduced into the outer cylinder to heat the drying cylinder. After drying the sludge, the hot air is extracted from the outer cylinder through the third pipeline, filtered and heated, and then re-introduced between the outer cylinder and the drying cylinder to realize the recycling of heat energy and reduce the waste of heat energy. Through the recycling and utilization of heat energy and the filtration treatment of hot air, the direct discharge of hot air into the external environment is avoided. After the filtration treatment by multiple filter plates in the filter component, the clean air is discharged to the outside, reducing environmental pollution. Through the design of surrounding a continuous bent hot air pipe into a ring shape, and the hot air pipe is installed on the inner wall of the outer cylinder, the uniformly distributed air outlets on the hot air pipe can evenly blow the hot air onto the drying cylinder to realize uniform heating of the sludge, thereby improving the drying effect of the sludge, so as to solve the problems proposed in the above background technology.

[0006] To achieve the above purpose, the present utility model provides the following technical solutions: A blowing device for drying hazardous waste sludge dryer, including a support base, an outer cylinder installed on the support base, and a drying cylinder rotatably installed inside the outer cylinder. A heat energy recovery mechanism is installed on the outer wall of the outer cylinder. The heat energy recovery mechanism includes a base fixed to the upper end of the outer wall of the outer cylinder, a heating component and a filter component installed on the base, and the heating component and the filter component are connected.

[0007] A hot air pipe is installed on the inner wall of the outer cylinder. The hot air pipe is a continuously bent and ring-shaped hot air pipe, and a plurality of air outlets are installed on the hot air pipe. The air outlets of the plurality of air outlets all face the outer wall of the drying cylinder.

[0008] A second pipeline is connected between one end of the heating component and the air inlet end of the hot air pipe. One end of the filter component is connected with a third pipeline, and one end of the third pipeline passes through the outer cylinder and is located between the outer cylinder and the drying cylinder.

[0009] Preferably, a first pipeline is connected between the other end of the heating component and the other end of the filter component, and a first valve is installed on the first pipeline.

[0010] Preferably, a third valve is installed at one end of the third pipeline close to the filter component. An exhaust pipe is connected to the third pipeline, and a second valve is installed on the exhaust pipe.

[0011] Preferably, the heating component includes a heating box installed on the base. A heating coil is installed inside the heating box, and an air inlet pipe for introducing external air is installed on the top of the heating box.

[0012] Preferably, the filter component includes a filter box installed on the base. A limiting plate is installed between the two opposite inner walls of the filter box, and a filter plate is installed between the corresponding two limiting plates.

[0013] Preferably, a cover plate is detachably installed on the filter box, a limiting component is installed below the cover plate, and the limiting component is pressed against the filter plate.

[0014] Preferably, the limiting component includes a U-shaped limiting frame, a pressing plate is slidably installed inside the limiting frame, a spring is connected between the pressing plate and the inner top of the limiting frame, a slider is connected to the side of the pressing plate, a sliding groove is opened on the inner wall of the limiting frame, and the slider is slidably installed inside the sliding groove.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. Through the design of installing a heat energy recovery mechanism above the drying cylinder, and then introducing hot air into the outer cylinder to heat the drying cylinder, after drying the sludge, the hot air is extracted from the outer cylinder through the third pipeline and then filtered and heated before being re-introduced between the outer cylinder and the drying cylinder, realizing the recycling of heat energy and reducing the waste of heat energy.

[0017] 2. By recycling and utilizing heat energy and filtering hot air, the present utility model avoids directly discharging hot air into the external environment. After being filtered by multiple filter plates in the filtering component, the clean air is discharged to the outside, reducing environmental pollution.

[0018] 3. Through the design of surrounding a continuous bent hot air pipe into a ring shape, and the hot air pipe is installed on the inner wall of the outer cylinder, the uniformly distributed air outlet nozzles on the hot air pipe can blow hot air evenly onto the drying cylinder, realizing uniform heating of the sludge, and thus improving the drying effect of the sludge. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the hot air pipe of the present utility model;

[0021] Figure 3 is an exploded view of the heat energy recovery mechanism of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the limiting component of the present utility model.

[0023] In the figure: 1, support base; 2, outer cylinder; 3, drying cylinder; 4, sealing plate; 5, heat energy recovery mechanism; 51, base; 52, heating component; 521, heating box; 522, heating coil; 523, intake pipe; 53, filtering component; 531, filtering box; 532, limiting plate; 533, filter plate; 534, limiting component; 535, cover plate; 54, first pipe; 55, first valve; 56, second pipe; 57, third pipe; 58, exhaust pipe; 59, second valve; 510, third valve; 6, hot air pipe; 61, air outlet nozzle; 7, limiting frame; 8, sliding groove; 9, pressing plate; 10, spring; 11, slider. Detailed implementation mode

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1-4 , the present invention provides a technical solution: a blowing device for drying a hazardous waste sludge dryer, including a support base 1, an outer cylinder 2 installed on the support base 1, and a drying cylinder 3 rotatably installed inside the outer cylinder 2. Circular sealing plates 4 are provided at both ends of the outer cylinder 2, and the inner ring of the sealing plate 4 fits against the outer wall of the drying cylinder 3, and the drying cylinder 3 rotates inside the sealing plate 4;

[0026] Furthermore, the rotation of the drying cylinder 3 is driven by a motor. Optionally, outer toothed rings are installed at both ends of the outer wall of the drying cylinder 3, one end of the output shaft of the motor is connected with a gear, and the gear meshes with the outer toothed ring, and the motor drives the drying cylinder 3 to rotate through the cooperation of the gear and the outer toothed ring.

[0027] A heat energy recovery mechanism 5 is installed on the outer wall of the outer cylinder 2. The heat energy recovery mechanism 5 includes a base 51 fixed to the upper end of the outer wall of the outer cylinder 2, a heating component 52 and a filtering component 53 installed on the base 51, and the heating component 52 and the filtering component 53 are communicated; after the hot air dries the hazardous waste sludge in the drying cylinder 3, it is drawn out into the filtering component 53 for filtering treatment to filter out impurities, harmful gases, etc. carried in the hot air, and then the filtered hot air enters the heating component 52 for secondary heating to realize the recovery and utilization of heat energy.

[0028] As Figure 2 shown, a hot air pipe 6 is installed on the inner wall of the outer cylinder 2. The hot air pipe 6 is set as a continuously bent and annular hot air pipe, and a plurality of air outlet nozzles 61 are installed on the hot air pipe 6, and the air outlets of the plurality of air outlet nozzles 61 all face the outer wall of the drying cylinder 3;

[0029] The hot air pipe 6 includes a plurality of straight pipes arranged at equal intervals in a ring shape, and the ends of two adjacent straight pipes are connected by a semi-circular elbow. A plurality of air outlets 61 are arranged at equal intervals on each straight pipe.

[0030] A second pipe 56 is connected between one end of the heating assembly 52 and the air inlet end of the hot air pipe 6. One end of the filtering assembly 53 is connected to a third pipe 57. One end of the third pipe 57 passes through the outer cylinder 2 and is located between the outer cylinder 2 and the drying cylinder 3. The hot air enters the interior of the hot air pipe 6 through the second pipe 56 and blows out from the air outlets 61, so that the hot air evenly blows on the outer wall of the drying cylinder 3. The drying cylinder 3 then conducts the heat to the hazardous waste sludge inside it, realizing the heating and drying of the hazardous waste sludge and fully removing the moisture in the hazardous waste sludge.

[0031] A first pipe 54 is connected between the other end of the heating assembly 52 and the other end of the filtering assembly 53. A first valve 55 is installed on the first pipe 54. The filtered clean hot air can be sent into the heating assembly 52 through the first pipe 54.

[0032] A third valve 510 is installed at one end of the third pipe 57 close to the filtering assembly 53. An exhaust pipe 58 is connected to the third pipe 57, and a second valve 59 is installed on the exhaust pipe 58.

[0033] The heating assembly 52 includes a heating box 521 installed on the base 51. A heating coil 522 is installed inside the heating box 521, and an air inlet pipe 523 for introducing external air is installed on the top of the heating box 521.

[0034] Specifically, a control board and a temperature control switch are also installed on the heating box 521. The temperature control switch is electrically connected to the control board and is used to drive the heating coil 522 to operate. The pumps on multiple pipes are also connected to the control board to control the flow of hot air. The specific connection methods among the control board, the pumps, and the temperature control switch are all prior arts and will not be elaborated here.

[0035] The filtering assembly 53 includes a filtering box 531 installed on the base 51. A limiting plate 532 is installed between two opposite inner walls of the filtering box 531. The limiting plate 532 is a U-shaped limiting plate, and a filtering plate 533 is installed between the corresponding two limiting plates 532. A plurality of filtering plates 533 are arranged at equal intervals, and the filtering materials in the filtering plates 533 include but are not limited to PP cotton, activated carbon, polypropylene, and ceramsite.

[0036] A cover plate 535 is detachably installed on the filtering box 531, and a limiting assembly 534 is installed below the cover plate 535. The limiting assembly 534 presses on the filtering plate 533.

[0037] The limiting component 534 includes a U-shaped limiting frame 7. A pressing plate 9 is slidably installed inside the limiting frame 7. A spring 10 is connected between the inner top of the limiting frame 7 and the pressing plate 9. A slider 11 is connected to the side of the pressing plate 9. A sliding groove 8 is formed in the inner wall of the limiting frame 7, and the slider 11 is slidably installed inside the sliding groove 8.

[0038] During use, the wet hazardous waste sludge is put into the drying cylinder 3, and the drying cylinder 3 is driven to rotate. At the same time, the outside air is pumped into the heating box 521 through the air inlet pipe 523, and the heating coil 522 is driven to operate and generate heat to heat the introduced air (the temperature of the heated air is generally 300 - 400 °C). Then the hot air enters the inside of the hot air pipe 6 through the second pipe 56 and blows out from the air outlet nozzle 61, so that the hot air evenly blows on the outer wall of the drying cylinder 3. The drying cylinder 3 then conducts the heat to the hazardous waste sludge inside it, realizing the heating and drying of the hazardous waste sludge and fully removing the moisture in the hazardous waste sludge.

[0039] During the drying process, to reduce the waste of heat energy, the heat energy is pumped into the inside of the third pipe 57. Subsequently, the hot air enters the inside of the filtering component 53. The multiple filter plates 533 in the filtering component 53 filter out foreign matters such as impurities brought out by the hot air from the outer cylinder 2, ensuring the cleanliness of the hot air. The filtered hot air (at this time, the temperature of the hot air has decreased) re-enters the heating box 521 through the first pipe 54 to reheat the hot air to the drying temperature, reducing the energy required to directly heat the outside air to the drying temperature.

[0040] After the recycled hot air is reheated, it enters the inside of the hot air pipe 6 through the second pipe 56 again and continuously dries the hazardous waste sludge through the air outlet nozzle 61. This process is repeated until after drying is completed, the filtered and clean hot air is discharged from the exhaust pipe 58.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A blowing device for drying hazardous waste sludge drying machine, comprising a support base (1), an outer cylinder (2) mounted on the support base (1), and a drying cylinder (3) rotatably mounted inside the outer cylinder (2), characterized in that: A heat energy recovery mechanism (5) is installed on the outer wall of the outer cylinder (2). The heat energy recovery mechanism (5) includes a base (51) fixed to the upper end of the outer wall of the outer cylinder (2), a heating component (52) and a filtering component (53) installed on the base (51), and the heating component (52) and the filtering component (53) are communicated with each other. A hot air pipe (6) is installed on the inner wall of the outer cylinder (2). The hot air pipe (6) is arranged to be continuously bent and form a ring-shaped hot air pipe. A plurality of air outlets (61) are installed on the hot air pipe (6), and the air outlets of the plurality of air outlets (61) all face the outer wall of the drying cylinder (3). A second pipe (56) is connected between one end of the heating component (52) and the air inlet end of the hot air pipe (6). One end of the filtering component (53) is connected with a third pipe (57), and one end of the third pipe (57) passes through the outer cylinder (2) and is located between the outer cylinder (2) and the drying cylinder (3).

2. The blowing device for drying hazardous waste sludge drying machine according to claim 1 is characterized by: A first pipe (54) is connected between the other end of the heating component (52) and the other end of the filtering component (53), and a first valve (55) is installed on the first pipe (54).

3. The blowing device for drying hazardous waste sludge drying machine according to claim 1 is characterized by: A third valve (510) is installed at one end of the third pipe (57) close to the filtering component (53). An exhaust pipe (58) is connected to the third pipe (57), and a second valve (59) is installed on the exhaust pipe (58).

4. The blowing device for drying hazardous waste sludge drying machine according to claim 1 is characterized in that: The heating component (52) includes a heating box (521) installed on the base (51). A heating coil (522) is installed inside the heating box (521), and an air inlet pipe (523) for introducing external air is installed on the top of the heating box (521).

5. The blowing device for drying hazardous waste sludge drying machine according to claim 1 is characterized by: The filtering component (53) includes a filtering box (531) installed on the base (51). A limiting plate (532) is installed between two opposite inner walls of the filtering box (531), and a filtering plate (533) is installed between the corresponding two limiting plates (532).

6. The blowing device for drying hazardous waste sludge drying machine according to claim 5 is characterized by: A cover plate (535) is detachably installed on the filtering box (531), and a limiting component (534) is installed below the cover plate (535), and the limiting component (534) presses on the filtering plate (533).

7. The blowing device for drying hazardous waste sludge drying machine according to claim 6 is characterized by: The limiting component (534) includes a U-shaped limiting frame (7). A pressing plate (9) is slidably installed inside the limiting frame (7). A spring (10) is connected between the pressing plate (9) and the inner top of the limiting frame (7). A slider (11) is connected to the side of the pressing plate (9), and a sliding groove (8) is formed on the inner wall of the limiting frame (7), and the slider (11) is slidably installed inside the sliding groove (8).

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