Dust removal equipment for discharge hole of scraper

Abstract

The utility model provides scraping machine discharge port dust removal equipment which comprises a prilling tower, a closed cavity, a fan, a dust recovery device and a conveying belt, a discharge port of the prilling tower is connected with one end of the closed cavity in a closed mode, and the other end of the closed cavity is connected with a discharge port of the next process in a closed mode; the transmission belt is arranged in the closed chamber; an air inlet of the fan is communicated with one side of the closed chamber through a pipeline; an air outlet of the fan is communicated with an air window of the prilling tower through the pipeline; the dust recovery device is arranged at the top of the prilling tower; by the adoption of the technical scheme, dust generated at the discharging port can be effectively controlled, recycling of the dust at the discharging port is achieved, pollution of the dust to the environment is reduced, and occupational health risks of workers are reduced.

Description

Technical Field

[0001] This application relates to the technical field of urea dust removal, and specifically relates to a dust removal device for the discharge port of a scraper. Background Art

[0002] The granulation system of the urea plant uses traditional high tower granulation. The concentration of urea particles with a diameter less than 1.18 mm at the bottom discharge port of the tower is between 1% and 2%. During the belt transmission process, small particles and dust disperse in the air, causing environmental pollution and posing a risk to the occupational health of operators.

[0003] The discharge port of the traditional urea plant scraper is at the end of the long belt and is far from the air separation dust removal device. Due to the long distance, the suction pipe of the belt dust removal fan cannot be connected to the discharge port. During normal production, the dust at the bottom discharge port of the granulation tower cannot be recovered, polluting the environment and causing product losses. Utility Model Content

[0004] The purpose of this utility model is to provide a dust removal device for the discharge port of a scraper, which can effectively control the dust generated at the discharge port, realize the recovery of the dust at the discharge port, reduce environmental pollution caused by dust, and reduce the occupational health risks of workers.

[0005] This application is achieved through the following technical solutions, specifically:

[0006] A dust removal device for the discharge port of a scraper, comprising: a granulation tower, a closed chamber, a fan, a dust recovery device, and a transmission belt. Among them, the discharge port of the granulation tower is hermetically connected to one end of the closed chamber, and the other end of the closed chamber is hermetically connected to the discharge port of the next process; the transmission belt is placed in the closed chamber; the air inlet of the fan is connected to one side of the closed chamber through a pipeline; the air outlet of the fan is connected to the air window of the granulation tower through the pipeline; the dust recovery device is arranged at the top of the granulation tower.

[0007] As a preferred technical solution of the dust removal device for the discharge port of the scraper in this application, a recovery tower air inlet is arranged below one side of the dust recovery device; a recovery tower discharge port is arranged at the bottom of the dust recovery device; a spray port and a cooling water inlet are arranged above the other side of the dust recovery device, and the spray port is located above the cooling water inlet.

[0008] As a further technical means of the dust removal device for the discharge port of the scraper in this application, the recovery tower air inlet is connected to the air outlets of several fans through the pipeline, and the air outlets of several fans are connected in parallel through the pipeline.

[0009] As a preferred technical solution of the dust removal device at the discharge port of the scraper in this application, the dust recovery device is higher than the air window.

[0010] As a preferred technical solution of the dust removal device at the discharge port of the scraper in this application, the inner walls of the device are all coated with a corrosion-resistant material.

[0011] The beneficial effects of this application are as follows:

[0012] The dust removal device at the discharge port of the scraper provided in this application includes a material-making tower, a closed chamber, a fan, a dust recovery device, and a conveyor belt. Among them, the discharge port of the material-making tower is hermetically connected to one end of the closed chamber, and the other end of the closed chamber is hermetically connected to the discharge port of the next process. The function of the closed chamber is to provide a closed environment to prevent the dust generated during the transmission of materials from leaking out, which may cause certain harm to the environment and the occupational health of operators. The closed chamber is hermetically connected to the discharge port to ensure that the materials can smoothly enter the closed chamber. The conveyor belt is placed in the closed chamber and is used to transport the materials from the discharge port to the next processing stage. The air inlet of the fan is connected to one side of the closed chamber through a pipeline and is used to suck small particles and dust in the closed chamber. The air outlet of the fan is connected to the air window of the material-making tower through the pipeline to blow the inhaled small particles and dust back into the material-making tower, forming an air circulation, thereby reducing the leakage of dust. The dust recovery device is arranged on the top of the material-making tower and is used to recover and process the small particles and dust blown back into the material-making tower. In summary, this application can effectively control the dust generated at the discharge port, realize the recovery of the dust at the discharge port, and reduce the environmental pollution caused by the dust and the occupational health risks of the staff by establishing a closed air circulation and a dust recovery device. Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of a dust removal device at the discharge port of a scraper;

[0014] Figure 2 It is Figure 1 a structural schematic diagram of the dust recovery and treatment at position a in

[0015] Description of the Reference Numerals in the Drawings

[0016] 1. Material-making tower; 11. Discharge port; 12. Air window;

[0017] 2. Closed chamber;

[0018] 3. Fan; 31. Air inlet; 32. Air outlet;

[0019] 4. Dust recovery device; 41. Inlet of the recovery tower; 42. Outlet of the recovery tower; 43. Spray port; 44. Inlet of cooling water;

[0020] 5. Conveyor belt;

[0021] 6. Outlet of the next process;

[0022] 7. Pipeline. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0025] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0026] In the description of the embodiments of this application, the technical term "several" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0027] In the description of the embodiments of this application, the orientation or positional relationship indicated by technical terms such as "upper", "lower", "inner", "outer", "one side", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of this application.

[0028] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "arrangement", "provided with", "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0029] The inventors of the present application have proposed a dust removal device for the discharge port of a scraping machine. Refer to Figure 1 - Figure 2 , Figure 1 which is a schematic structural diagram of a dust removal device for the discharge port of a scraping machine provided by an embodiment of the present application. Figure 2 For Figure 1 it is a schematic structural diagram of the dust recovery treatment at point a in

[0030] Refer to Figure 1 - Figure 2 , a dust removal device for the discharge port of a scraping machine includes: a granulation tower 1, a sealed chamber 2, a fan 3, a dust recovery device 4, and a conveyor belt 5. Among them, the discharge port 11 of the granulation tower 1 is hermetically connected to one end of the sealed chamber 2, and the other end of the sealed chamber 2 is hermetically connected to the discharge port 6 of the next process. The sealed chamber 2 provides a sealed environment to ensure that the material can smoothly enter the sealed chamber 2 to prevent the leakage of small particles and dust generated during the transmission of the material. The conveyor belt 5 is placed inside the sealed chamber 2 to realize the transmission of the material from the discharge port 11 to the next treatment stage in a sealed environment. The air inlet 31 of the fan 3 is connected to one side of the sealed chamber 2 through a pipeline 7 for sucking small particles and dust inside the sealed chamber 2. The air outlet 32 of the fan 3 is connected to the air window 12 of the granulation tower 1 through the pipeline 7 for blowing the sucked small particles and dust back into the granulation tower 1 to form an air circulation. The dust recovery device 4 is arranged on the top of the granulation tower 1 for recovering and treating the small particles and dust re-sucked into the granulation tower 1.

[0031] Specifically, the granulation device of the urea plant uses traditional high-tower granulation. The concentration of urea particles with a diameter less than 1.18 mm at the bottom discharge port of the tower is between 1% and 2%. Therefore, the selection parameters of the fan 3 can refer to the parameters of traditional fans. For example, the parameters of the traditional K-303 fan: flow rate: 16326 m 3 / h, total pressure: 1640 pa, rotational speed: 1450 r / min, power: 11 kw.

[0032] Optionally, continue to refer to Figure 1 - Figure 2 As shown in Figure 1 - Figure 2 , an intake port 41 for the recovery tower is provided below one side of the dust recovery device 4. Small particles and dust in the granulation tower 1 enter the dust recovery device 4 through the intake port 41 of the recovery tower for recovery treatment. Among them, a spray port 43 and a cooling water inlet 44 are provided above the other side of the dust recovery device 4. The spray port 43 is located above the cooling water inlet 44. The spray port 43 is used to spray liquid into the recovery tower to humidify the dust and help it settle. The cooling water inlet 44 located below the spray port 43 provides a cooling solution to the tower, so that small particles and dust are condensed and heat-exchanged to form a urea solution, which is discharged from the discharge port 42 of the recovery tower provided at the bottom of the dust recovery device 4 after recovery treatment and returns to the granulation tower 1 for re-granulation, thereby realizing dust recovery and reducing product loss.

[0033] Optionally, continue to refer to Figure 1 - Figure 2 As shown in Figure 1 - Figure 2 , the intake port 41 of the recovery tower is communicated with the air outlet 32 of several blowers 3 through the pipeline 7. Among them, the air outlets 32 of several blowers 3 are connected in parallel through the pipeline 7. By connecting the air outlets 32 of several blowers 3 through the pipeline 7, the processing capacity and efficiency of the equipment for small particles and dust in the air can be increased. This design allows more small particles and dust to be simultaneously sucked into the dust recovery device 4, thereby improving the dust recovery and treatment efficiency.

[0034] Optionally, continue to refer to Figure 1 - Figure 2 As shown in Figure 1 - Figure 2 , the dust recovery device 4 is higher than the air window 12. After the small particles and dust in the air are blown back into the granulation tower 1 through the pipeline 7 by the air outlet 32 of the blower 3, during normal production, the dust is brought to the top of the granulation tower 1 by the upward air flow. At this time, the dust recovery device 4 recovers and treats the small particles and dust in the air inside the granulation tower 1.

[0035] Optionally, since urea will be corrosive after absorbing moisture in the air, the inner wall of the equipment is coated with a corrosion-resistant material coating, such as a corrosion-resistant coating prepared from raw materials such as vinyl ester resin, cobalt isooctoate, dibutyl phthalate, and methyl ethyl ketone peroxide, so as to improve the service life of the equipment and reduce the later maintenance cost.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dust removal device for a scraper discharge port, characterized in that: include: A material making tower (1), a closed chamber (2), a fan (3), a dust recovery device (4) and a transmission belt (5), The material discharge port (11) of the material making tower (1) is tightly connected to one end of the closed chamber (2), and the other end of the closed chamber (2) is tightly connected to the material discharge port (6) of the next process; The transmission belt (5) is placed in the closed chamber (2); The air inlet (31) of the fan (3) is connected to one side of the closed chamber (2) through a pipeline (7); The air outlet (32) of the fan (3) is connected to the wind window (12) of the material making tower (1) through the pipeline (7); The dust recovery device (4) is arranged at the top of the material making tower (1).

2. The dust removal device for the scraper discharge port according to claim 1 is characterized in that: A recovery tower air inlet (41) is provided at the lower side of the dust recovery device (4); The dust recovery device (4) is provided with a recovery tower discharge port (42) at the bottom of the tower; A spray port (43) and a cooling water inlet (44) are provided above the other side of the dust recovery device (4), wherein the spray port (43) is located above the cooling water inlet (44).

3. The dust removal device for the scraper discharge port according to claim 2 is characterized in that: The recovery tower air inlet (41) is connected to the air outlets (32) of the plurality of fans (3) through the pipeline (7), wherein the air outlets (32) of the plurality of fans (3) are connected in parallel through the pipeline (7).

4. The dust removal device for the scraper discharge port according to claim 1, characterized in that: The dust recovery device (4) is higher than the wind window (12).

5. The dust removal device for the discharge port of a scraper according to any one of claims 1 to 4, characterized in that: The inner walls of the equipment are all covered with a corrosion-resistant material coating.

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