Negative pressure ventilation device for closed plant of carbon black production line

Abstract

The utility model discloses a carbon black production line closed workshop negative pressure ventilation device which comprises a negative pressure axial flow fan arranged on the outer wall of a carbon black production workshop, the air inlet end of the negative pressure axial flow fan is located on the inner side of the workshop, and the air outlet end of the negative pressure axial flow fan is connected with a spraying adsorption assembly. The utility model relates to the technical field of carbon black production, and utilizes the driving effect of the negative pressure axial flow fan to extract dust-containing gas in a workshop, thereby improving the air environment quality of the internal space of the workshop. Large-particle dust and carbon black particles in airflow are filtered and intercepted through the dust removal filtering assembly, the primarily-filtered gas further enters the spraying adsorption assembly, and after spraying water mist makes contact with small-particle dust in the airflow, the particle dust moves downwards under the action of gravity, so that the dust removal effect is achieved. And the clean air is driven by the pressurizing axial flow fan to be further exhausted outdoors through the air inducing pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon black production, in particular to a negative pressure ventilation device for a closed workshop of a carbon black production line. Background Art

[0002] Carbon black is an important chemical raw material, widely used in the rubber, chemical, and plastic industries. Industrial carbon black is primarily divided into rubber carbon black and pigment carbon black. Carbon black processing typically takes place in closed workshops. The raw material enters the pulverizer through a feed valve, where it undergoes ultrafine grinding through collision, friction, and shearing. The crushed material ascends with the airflow into the grading chamber. Particles that meet the required particle size are graded by the impeller and then enter the collection system. Particles that do not meet the required particle size return to the pulverization chamber for further pulverization. After pulverization, the particles that meet the required particle size are transported by wind to a filter, which separates the airflow from the particles. The particles are then collected and used for various purposes. However, in actual production processes, such as granulation, packaging, and equipment maintenance, a small amount of carbon black dust is inevitably generated. Because the density of carbon black dust is lower than that of air, it directly affects the air quality in the workshop and seriously affects the health of operators. In light of this, in-depth research into this issue led to the present case. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a negative pressure ventilation device for a closed workshop of a carbon black production line, which solves the problems raised in the background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a negative pressure ventilation device for a closed workshop of a carbon black production line, comprising a negative pressure axial flow fan arranged on the outer wall of a carbon black production workshop, the air inlet end of the negative pressure axial flow fan being located inside the workshop, the air outlet end of the negative pressure axial flow fan being connected to a spray adsorption assembly, the upper part of the spray adsorption assembly being connected to an induced air guide assembly, the outlet end of the induced air guide assembly being at least 1.5 meters above the roof surface of the workshop, and the air inlet end of the negative pressure axial flow fan being installed with a filter dust removal assembly;

[0005] The air induced flow guide component includes an air induced flow duct arranged at the air outlet end of the spray adsorption component. The air induced flow duct is arranged in an L shape. A booster axial flow fan is installed on the air induced flow duct. A support is provided on the top of the air induced flow duct. A rain and insect proof cover is installed on the top of the support.

[0006] The above-mentioned filtering and dust removal assembly includes a box body, a limiting groove and a dust removal component. The box body is installed on the air inlet end of the negative pressure axial flow fan. An air inlet is opened on one side of the box body. A metal porous mesh plate is provided at the air inlet position. A rectangular notch is opened on the side wall of the box body. The limiting groove is symmetrically opened on the inner wall surface of the box body and faces the rectangular notch position. The dust removal component is inserted into the rectangular notch and slides with the limiting groove.

[0007] The above-mentioned dust removal component includes a slide groove, a guide rail, a filter screen, an end cover and an armrest. The slide groove is inserted into the rectangular notch, the guide rail is arranged on the lower end of the slide groove and slides with the limit groove, the filter screen is arranged in the slide groove along the inclined direction, the end cover is arranged on one end of the slide groove and is assembled and connected to the side wall of the box body, and the armrest is welded to the side wall of the end cover.

[0008] A threaded hole is provided on the side wall of the box body, and threaded seats are respectively provided on the four corners of the end cover. Locking bolts are inserted into the threaded seats, and one end of the locking bolts is inserted into the threaded hole.

[0009] The above-mentioned spray adsorption assembly includes a purification chamber, a water tank, a booster pump and a spray component. The purification chamber is arranged outside the carbon black production workshop and a sewage valve is provided at the bottom. The air outlet end of the negative pressure axial flow fan passes through the side wall of the purification chamber. The water tank is arranged on one side of the purification chamber. The liquid inlet end of the booster pump is connected to the water tank. The spray component is arranged at the air outlet position at the top of the purification chamber and one end is connected to the liquid discharge end of the booster pump.

[0010] The above-mentioned spray component includes an annular tube and a spray head. The annular tube is arranged in the purification chamber and located at the top of the purification chamber. The annular tube is connected to the discharge end of the booster pump through the liquid inlet pipe. The spray head is arranged on the lower side wall of the annular tube along the inclined direction and is arranged in an annular array.

[0011] The utility model provides a negative pressure ventilation device for a closed workshop of a carbon black production line. The invention has the following beneficial effects: the carbon black production line is equipped with a closed workshop negative pressure ventilation device, and a negative pressure axial flow fan is arranged on the outer wall of the carbon black production workshop. The dust-laden gas inside the workshop is extracted by the driving action of the negative pressure axial flow fan, thereby improving the air environment quality of the internal space of the workshop. Under the action of wind pressure, the dust-laden gas first enters the dust removal filter component, and the dust removal filter component is used to filter and intercept large particles of dust and carbon black particles in the air flow. After preliminary filtration, the gas further enters the spray adsorption component position. After the spray water mist contacts the small particles of dust in the air flow, the water mist adheres to the dust particles, and the particles of dust move downward under the action of gravity, and the clean air is further driven by the booster axial flow fan and discharged to the outside through the induced draft duct, which can greatly reduce the possibility of carbon black dust overflow. At the same time, the induced draft duct is arranged in an L shape and the outlet end is more than 1.5 meters above the roof surface of the workshop, which can effectively prevent the exhaust airflow from heading towards the outdoor aerodynamic shadow area and positive pressure area, thereby improving the stability of the overall operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the main structure of a negative pressure ventilation device for a closed workshop of a carbon black production line described in the utility model.

[0013] Figure 2 This is a side structural schematic diagram of a negative pressure ventilation device for a closed workshop of a carbon black production line described in the utility model.

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the dust removal and filtering assembly of the present invention.

[0015] Figure 4 This is a schematic diagram of the axonometric structure of the box body of the present invention.

[0016] Figure 5 This is a schematic diagram of the axonometric structure of the dust removal component of the present invention.

[0017] In the figure: 1. Exterior wall of carbon black production workshop; 2. Negative pressure axial flow fan; 3. Induced air duct; 4. Booster axial flow fan; 5. Support; 6. Rain and insect proof cover; 7. Box body; 8. Limit groove; 9. Slide; 10. Guide rail; 11. Filter screen; 12. End cover; 13. Handrail; 14. Threaded seat; 15. Locking bolt; 16. Purification chamber; 17. Water tank; 18. Booster pump; 19. Ring pipe; 20. Sprinkler head. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] Example: In conjunction with the specification Figure 1-5It can be seen that in order to solve the problem of serious dust emission in the carbon black production workshop in the prior art, the present application specifically designs a negative pressure ventilation device for a closed workshop of a carbon black production line, including a negative pressure axial flow fan 2 arranged on the outer wall 1 of the carbon black production workshop, the air inlet end of the negative pressure axial flow fan 2 is located on the inner side of the workshop, the air outlet end of the negative pressure axial flow fan 2 is connected with a spray adsorption component, the upper part of the spray adsorption component is connected with an induced wind guide component, the outlet end of the induced wind guide component is at least 1.5 meters higher than the roof surface of the workshop, and the air inlet end of the negative pressure axial flow fan 2 is installed with a filtering dust removal component; wherein, the induced wind guide component includes an induced wind duct 3 arranged at the air outlet end of the spray adsorption component, the induced wind duct 3 is arranged in an L shape, a booster axial flow fan 4 is installed on the induced wind duct 3, a support 5 is provided on the top of the induced wind duct 3, and a rainproof and insect-proof cover 6 is installed on the top of the support 5. The negative pressure axial flow fan 2 is arranged on the outer wall of the carbon black production workshop, and the negative pressure axial flow fan 2 is used to remove the dust from the workshop. The driving action of the compressed axial flow fan 2 extracts the dust-laden gas inside the workshop building, thereby improving the air environment quality of the interior space of the workshop building. Under the action of wind pressure, the dust-laden gas first enters the dust removal filter component, and the dust removal filter component is used to filter and intercept large particles of dust and carbon black particles in the air flow. The gas after preliminary filtration further enters the spray adsorption component position. After the spray water mist contacts the small particles of dust in the air flow, the water mist adheres to the dust particles, and the particles of dust move downward under the action of gravity. The clean air is further driven by the booster axial flow fan 4 and discharged to the outside through the induced draft duct 3, which can greatly reduce the possibility of carbon black dust overflow. At the same time, the induced draft duct 3 is arranged in an L shape and the outlet end is more than 1.5 meters above the roof surface of the workshop, which can effectively prevent the discharged airflow from heading towards the outdoor aerodynamic shadow area and positive pressure area, thereby improving the stability of the overall operation of the device.

[0020] In the specific implementation process, the above-mentioned filtering and dust removal assembly includes a box body 7, a limiting groove 8 and a dust removal component. The box body 7 is installed on the air inlet end of the negative pressure axial flow fan 2. An air inlet is provided on one side of the box body 7, and a metal porous mesh plate is provided at the air inlet position. A rectangular notch is provided on the side wall of the box body 7. The limiting groove 8 is symmetrically provided on the inner wall surface of the box body 7 and is opposite to the rectangular notch position. The dust removal component is inserted into the rectangular notch and slides with the limiting groove 8; wherein the dust removal component includes a slide 9, a guide rail 10, a filter screen plate 11, an end cover 12 and an armrest 13. The slide 9 is inserted into the rectangular notch, the guide rail 10 is provided on the lower end of the slide 9 and slides with the limiting groove 8, the filter screen plate 11 is provided in the slide 9 along the inclined direction, and the end cover 12 is provided on one end of the slide 9 and It is assembled and connected with the side wall of the box body 7, and the handrail 13 is welded to the side wall of the end cover 12; threaded holes are provided on the side wall of the above-mentioned box body 7, and threaded seats 14 are respectively provided at the four corners of the end cover 12, and locking bolts 15 are inserted on the threaded seats 14, and one end of the locking bolt 15 is inserted into the threaded hole. The internal air of the workshop enters the box body 7 under the wind pressure of the negative pressure axial flow fan 2, and the filter plate 11 provided in the slide 9 is used to filter and intercept large particles of carbon black and dust particles in the air flow. During equipment maintenance, the locking bolts 15 on the four corners of the end cover 12 can be removed, and the end cover 12 and the slide 9 can be pulled out simultaneously through the handrail 13. After cleaning the filter plate 11, it can be reinserted into place. The structure is simple and maintenance is relatively convenient.

[0021] During the specific implementation process, the above-mentioned spray adsorption assembly includes a purification chamber 16, a water tank 17, a booster pump 18 and a spray component. The purification chamber 16 is arranged outside the carbon black production workshop and a drain valve is provided at the bottom. The air outlet end of the negative pressure axial flow fan 2 passes through the side wall of the purification chamber 16. The water tank 17 is arranged on one side of the purification chamber 16. The liquid inlet end of the booster pump 18 is connected to the water tank 17. The spray component is arranged at the air outlet position at the top of the purification chamber 16 and one end is connected to the discharge end of the booster pump 18; wherein the spray component includes an annular pipe 19 and a spray head 20. The annular pipe 19 is arranged in the purification chamber 16 and is located at the top position of the purification chamber 16. The annular pipe 19 is connected to the discharge end of the booster pump 18 through the liquid inlet pipe. The shower head 20 is set on the lower wall of the annular tube 19 in an inclined direction and is arranged in a circular array. The air flow after one filtration enters the purification chamber 16 under the wind pressure of the negative pressure axial flow fan 2, and goes up along the induced draft pipe 3. The booster pump 18 is started, and the water in the water tank 17 is extracted by the booster pump 18 and further injected into the annular tube 19. It is sprayed out through the shower head 20 on the side wall of the annular tube 19. During the contact between the sprayed water mist and the air flow, the water mist adheres to the carbon black and dust particles, and under the action of gravity, the carbon black and dust particles are gathered downward to the bottom of the purification chamber 16. The setting of the booster axial flow fan 4 can further improve the stability of the airflow in the induced draft pipe 3 and improve the overall operating efficiency of the device.

[0022] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A negative pressure ventilation device for a closed workshop of a carbon black production line, characterized in that: It includes a negative pressure axial flow fan installed on the outer wall of the carbon black production workshop, the air inlet end of the negative pressure axial flow fan is located inside the workshop, the air outlet end of the negative pressure axial flow fan is connected to a spray adsorption component, the upper part of the spray adsorption component is connected to an induced wind guide component, the outlet end of the induced wind guide component is at least 1.5 meters higher than the roof surface of the workshop, and the air inlet end of the negative pressure axial flow fan is installed with a filter dust removal component; The air induced flow guide component includes an air induced flow duct arranged at the air outlet end of the spray adsorption component. The air induced flow duct is arranged in an L shape. A booster axial flow fan is installed on the air induced flow duct. A support is provided on the top of the air induced flow duct. A rain and insect proof cover is installed on the top of the support.

2. A negative pressure ventilation device for a closed workshop of a carbon black production line according to claim 1, characterized in that: The filtering and dust removal assembly includes a box body, a limiting groove and a dust removal component. The box body is installed on the air inlet end of the negative pressure axial flow fan. An air inlet is provided on one side of the box body. A metal porous mesh plate is provided at the air inlet position. A rectangular notch is provided on the side wall of the box body. The limiting groove is symmetrically provided on the inner wall surface of the box body and is opposite to the rectangular notch position. The dust removal component is inserted into the rectangular notch and slides with the limiting groove.

3. A negative pressure ventilation device for a closed workshop of a carbon black production line according to claim 2, characterized in that: The dust removal component includes a slide, a guide rail, a filter screen, an end cover and an armrest. The slide is inserted into the rectangular notch, the guide rail is arranged on the lower end of the slide and slides with the limit groove, the filter screen is arranged in the slide along the inclined direction, the end cover is arranged on one end of the slide and is assembled and connected to the side wall of the box body, and the armrest is welded to the side wall of the end cover.

4. A negative pressure ventilation device for a closed workshop of a carbon black production line according to claim 3, characterized in that: A threaded hole is provided on the side wall of the box body, and threaded seats are respectively provided on the four corners of the end cover. Locking bolts are inserted into the threaded seats, and one end of the locking bolts is inserted into the threaded hole.

5. The negative pressure ventilation device for a closed workshop of a carbon black production line according to claim 1, characterized in that: The spray adsorption assembly includes a purification chamber, a water tank, a booster pump and a spray component. The purification chamber is arranged outside the carbon black production workshop and a sewage valve is provided at the bottom. The air outlet end of the negative pressure axial flow fan passes through the side wall of the purification chamber. The water tank is arranged on one side of the purification chamber. The liquid inlet end of the booster pump is connected to the water tank. The spray component is arranged at the air outlet position at the top of the purification chamber and one end is connected to the liquid discharge end of the booster pump.

6. A negative pressure ventilation device for a closed workshop of a carbon black production line according to claim 5, characterized in that: The spray component includes an annular tube and a spray head. The annular tube is arranged in the purification chamber and located at the top of the purification chamber. The annular tube is connected to the discharge end of the booster pump through the liquid inlet pipe. The spray head is arranged on the lower side wall of the annular tube along the inclined direction and is arranged in an annular array.

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