Calcium carbide crushing dust removal system

Abstract

The present application provides a calcium carbide crushing dust treatment system, including: a calcium carbide crushing device, a dust collection device and a dust conveying device. The calcium carbide crushing device includes a crusher, a first conveyor belt, a silo and a fine material bin. The dust collection device includes a first dust collection hood, a second dust collection hood, a third dust collection hood, a first fan, a second fan, a first dust collector and a second dust collector. The dust conveying device includes a nitrogen output unit, a first nitrogen branch pipe, a second nitrogen branch pipe and a nitrogen conveying main pipe. The nitrogen output structure is connected to the first nitrogen branch pipe and the second nitrogen branch pipe respectively. The first nitrogen branch pipe is connected to the discharge pipe of the first dust collector, and the second nitrogen branch pipe is connected to the discharge pipe of the second dust collector. The discharge pipes of the first dust collector and the second dust collector are combined to form a nitrogen conveying main pipe, and the output end of the nitrogen conveying main pipe is connected to the inlet of the fine material bin. The present application realizes the efficient collection and recycling of calcium carbide crushing dust.

Description

Technical Field

[0001] The present application relates to the technical field of calcium carbide production, and in particular to a calcium carbide crushing and dust removal ash treatment system. Background Art

[0002] Calcium carbide is an inorganic compound, white crystals, and industrial products are gray-black blocks with purple or gray cross-sections. It reacts violently with water to produce acetylene and release heat. Calcium carbide is an important chemical raw material, mainly used to produce acetylene gas.

[0003] In production, calcium carbide needs to be crushed into smaller particles and then transported to the reactor for reaction. Calcium carbide crushing is an important link in industrial production, but the process will generate a lot of dust, which will cause pollution to the surrounding environment. At present, the dust generated in the process of calcium carbide crushing is collected by forklifts and transferred to open-air sites, resulting in secondary dust. The environment is relatively harsh and dangerous, and the calcium carbide lime cannot be well recycled. If the weather is bad, especially rainy and snowy weather, calcium carbide dust will easily react with water to generate acetylene gas, which will be dangerous. Utility Model Content

[0004] The present application provides a calcium carbide crushing dust removal ash treatment system to solve the above-mentioned problems mentioned in the background technology.

[0005] The present application provides a calcium carbide crushing dust treatment system, comprising: a calcium carbide crushing device, a dust collection device and a dust conveying device. The calcium carbide crushing device comprises a crusher, a first conveyor belt, a silo, a fine material silo and a second conveyor belt, the first conveyor belt is arranged between the crusher and the silo, the feeder is connected to the feeder port of the silo, the second conveyor belt is arranged between the feeder and the fine material silo, and the outlet of the fine material silo is connected to an acetylene generator.

[0006] The dust collection device includes a first dust collection hood arranged above the crusher, a second dust collection hood arranged at the discharge port of the feeder, a third dust collection hood arranged above the silo, a first fan, a second fan, a first dust collector and a second dust collector. The first dust collection hood and the second dust collection hood are connected to the first dust pipeline through pipes, the first fan is connected between the output end of the first dust pipeline and the first dust collector, the third dust collection hood is connected to the second dust collector through the second dust pipeline, and the second fan is connected to the second dust pipeline.

[0007] The dust ash conveying device includes a nitrogen output unit, a first nitrogen branch pipe, a second nitrogen branch pipe and a nitrogen conveying main pipe. The nitrogen output unit is respectively connected with the first nitrogen branch pipe and the second nitrogen branch pipe. The first nitrogen branch pipe is connected with the discharge pipe of the first dust collector, and the second nitrogen branch pipe is connected with the discharge pipe of the second dust collector. The discharge pipes of the first dust collector and the second dust collector are combined to form a nitrogen conveying main pipe. The output end of the nitrogen conveying main pipe is connected with the inlet of the fine material bin.

[0008] Optionally, the nitrogen output unit includes a low-pressure nitrogen storage tank, a nitrogen compressor and a high-pressure nitrogen storage tank which are connected in sequence, the air inlet of the low-pressure nitrogen storage tank is connected to the nitrogen pipeline network, and the air outlet of the high-pressure nitrogen storage tank is respectively connected to the air inlets of the first nitrogen branch pipe and the second nitrogen branch pipe.

[0009] Optionally, the nitrogen output unit also includes a nitrogen recovery pipeline, the top of the fine material bin is connected to the inlet end of the nitrogen recovery pipeline through a filter, and the outlet end of the nitrogen recovery pipeline is connected to the air inlet of the low-pressure nitrogen storage tank.

[0010] Optionally, a first nitrogen regulating valve is provided on the first nitrogen branch pipe, and a second nitrogen regulating valve is provided on the second nitrogen branch pipe.

[0011] Optionally, a first ash hopper is provided at the bottom of the first dust collector, a first material level meter is provided in the first ash hopper, and a first discharge valve is provided on the discharge pipe of the first ash hopper. A second ash hopper is provided at the bottom of the second dust collector, a second material level meter is provided in the second ash hopper, and a second discharge valve is provided on the discharge pipe of the second ash hopper.

[0012] Optionally, a coarse material bin is further provided between the second conveyor belt and the fine material bin, the discharge end of the second conveyor belt is located above the feed port at the top of the coarse material bin, and a filter screen is provided on the pipeline between the coarse material bin and the fine material bin.

[0013] Optionally, the filter screen is tilted relative to the horizontal plane, a large-particle calcium carbide outlet is provided at the connection between the pipeline between the coarse material bin and the fine material bin and the lower end of the filter screen, and a large-particle calcium carbide tank is provided at the lower end of the large-particle calcium carbide outlet.

[0014] Optionally, a fourth dust collecting hood is provided at the upper end of the large-particle calcium carbide outlet, and the top of the fourth dust collecting hood is connected to the first dust pipeline through the third dust pipeline.

[0015] The calcium carbide crushing dust treatment system provided in the present application realizes the efficient collection and recycling of calcium carbide crushing dust, and has the following beneficial effects compared with the prior art:

[0016] (1) Calcium carbide is crushed by a crusher and transported to an acetylene generator through a first conveyor belt and a second conveyor belt for reaction. The dust generated during the crushing process is collected by a dust collection device, and the calcium carbide dust escaping from the crusher and the feeder outlet is extracted by a first fan through negative pressure and transported to the first dust collector for collection. At the same time, the dust escaping from the top of the silo is extracted by a second fan and transported to the second dust collector for dust removal, and the obtained dust is collected at the bottom of the second dust collector. Finally, the dust collected in the first dust collector and the second dust collector (i.e., the calcium carbide crushing dust) is transported to the fine material bin through a dust conveying device, and is input into the acetylene generator as a raw material for the production of acetylene. This not only avoids the environmental pollution caused by the calcium carbide dust escaping in the air, which helps to make the production environment cleaner and safer, but also recycles the calcium carbide dust, thereby improving the utilization rate of calcium carbide. The dust ash is pneumatically transported to the fine material bin by nitrogen for recycling, which not only avoids the waste of calcium carbide, but also transports the dust ash by inert gas nitrogen, which ensures the efficient transportation of the dust ash and improves the safety of the system.

[0017] (2) By setting up a nitrogen recovery pipeline, the waste of nitrogen is avoided, the utilization efficiency of nitrogen is improved, and the cost of dust removal and ash transportation in the enterprise is reduced.

[0018] (3) By installing a filter screen on the pipeline between the coarse material bin and the fine material bin, the calcium carbide particles are screened before entering the acetylene generator, and the calcium carbide particles that meet the acetylene production are screened to avoid the entry of larger calcium carbide particles, which will cause the calcium carbide particles to be too large and the reaction to be incomplete. At the same time, the reaction efficiency of the calcium carbide is improved. A fourth dust collection hood is installed at the upper end of the large-particle calcium carbide outlet to further reduce the escape of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a carbide crushing and dust removal ash treatment system provided in one embodiment of the present application;

[0021] Figure 2 A schematic diagram of the structure of a calcium carbide crushing and dust removal ash treatment system provided in another embodiment of the present application;

[0022] Figure 3 A structural schematic diagram of a calcium carbide crushing and dust removal ash treatment system provided in yet another embodiment of the present application;

[0023] Description of reference numerals:

[0024] 110: crusher, 120: first conveyor belt, 130: silo, 140: fine material bin, 150: second conveyor belt, 160: feeder, 170: acetylene generator, 180: coarse material bin, 181: filter screen, 182: large-particle calcium carbide outlet, 183: large-particle calcium carbide tank, 190: fourth dust collection hood, 191: third dust pipeline, 210: first dust collection hood, 220: second dust collection hood, 230: third dust collection hood, 240: first fan, 250: second fan, 260: first dust collector, 261: first ash hopper, 2 62: first material level meter, 263: first discharge valve, 270: second dust collector, 271: second ash hopper, 272: second material level meter, 273: second discharge valve, 280: first dust pipeline, 290: second dust pipeline, 310: nitrogen output unit, 311: low-pressure nitrogen storage tank, 312: nitrogen compressor, 313: high-pressure nitrogen storage tank, 320: first nitrogen branch pipe, 321: first nitrogen regulating valve, 330: second nitrogen branch pipe, 331: second nitrogen regulating valve, 340: nitrogen delivery main pipe, 350: nitrogen recovery pipeline, 351: filter. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application is clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present application.

[0026] like Figure 1 As shown, the present application provides a calcium carbide crushing dust treatment system, including: a calcium carbide crushing device, a dust collection device and a dust conveying device. The calcium carbide crushing device includes a crusher 110, a first conveyor belt 120, a silo 130, a fine material bin 140 and a second conveyor belt 150, the first conveyor belt 120 is arranged between the crusher 110 and the silo 130, the feeder 160 is connected to the feeder port of the silo 130, the second conveyor belt 150 is arranged between the feeder 160 and the fine material bin 140, and the outlet of the fine material bin 140 is connected to an acetylene generator 170.

[0027] The dust collection device includes a first dust collection hood 210 arranged above the crusher 110, a second dust collection hood 220 arranged at the discharge port of the feeder 160, a third dust collection hood 230 arranged above the silo 130, a first fan 240, a second fan 250, a first dust collector 260 and a second dust collector 270. The first dust collection hood 210 and the second dust collection hood 220 are connected to the first dust pipeline 280 through pipelines, the first fan 240 is connected between the output end of the first dust pipeline 280 and the first dust collector 260, the third dust collection hood 230 is connected to the second dust collector 270 through the second dust pipeline 290, and the second fan 250 is connected to the second dust pipeline 290.

[0028] The dust ash conveying device includes a nitrogen output unit 310, a first nitrogen branch pipe 320, a second nitrogen branch pipe 330 and a nitrogen conveying main pipe 340. The nitrogen output unit 310 is respectively connected to the first nitrogen branch pipe 320 and the second nitrogen branch pipe 330. The first nitrogen branch pipe 320 is connected to the discharge pipe of the first dust collector 260, and the second nitrogen branch pipe 330 is connected to the discharge pipe of the second dust collector 270. The discharge pipes of the first dust collector 260 and the second dust collector 270 are combined to form a nitrogen conveying main pipe 340. The output end of the nitrogen conveying main pipe 340 is connected to the inlet of the fine material bin 140.

[0029] Specifically, in the present application, the dust generated during the crushing and transportation of calcium carbide is collected and recycled, thereby avoiding the impact of the calcium carbide crushing dust on the environment and avoiding the waste of calcium carbide.

[0030] Calcium carbide crushing: Calcium carbide is input into the crusher 110 for crushing, and the crushed calcium carbide is input into the silo 130 for storage through the first conveyor belt 120. When in use, the calcium carbide in the silo 130 is fed to the second conveyor belt 150 through the feeder 160, and the calcium carbide particles are sent to the fine material bin 140 for reaction through the second conveyor belt 150. Acetylene gas is generated by adding calcium carbide particles and water to the acetylene generator 170. The calcium carbide particles in the fine material bin 140 are quantitatively input into the acetylene generator 170 to achieve acetylene production.

[0031] During the crushing and transportation of calcium carbide, the dust generated is collected by the dust collection device. A first dust collection hood 210 is provided above the crusher 110, and a second dust collection hood 220 is provided at the discharge port of the feeder 160. The first dust collection hood 210 and the second dust collection hood 220 are both connected to the first dust pipeline 280 through pipelines. The first fan 240 provides negative pressure, and the calcium carbide dust escaping from the discharge ports of the crusher 110 and the feeder 160 is extracted by negative pressure and transported to the first dust collector 260 for collection. At the same time, a third dust collection hood 230 is provided above the silo 130, and the dust escaping from the silo 130 is extracted by the second fan 250 and transported to the second dust collector 270 for dust removal, and the obtained dust is collected at the bottom of the second dust collector 270. Finally, the dust collected in the first dust collector 260 and the second dust collector 270 (i.e., the dust collected from the crushing of calcium carbide) is transported to the fine material bin 140 and input into the acetylene generator 170 as a raw material for the production of acetylene. In this way, the calcium carbide dust generated during the crushing and transportation of calcium carbide is collected and used as a raw material, which not only avoids the environmental pollution caused by the calcium carbide dust escaping into the air, but also helps to make the production environment cleaner and safer. In addition, the calcium carbide dust is recycled, which improves the utilization rate of calcium carbide and avoids the waste of calcium carbide. The enterprise has good economic and environmental benefits.

[0032] Among them, the top of the silo 130 is not connected to the same fan and dust collector as the discharge ports of the crusher 110 and the feeder 160. Because the silo 130 is relatively high, if the three use the same fan and dust collector, the distance will be long and the negative pressure in the pipeline needs to be maintained, causing the fan to operate at a high frequency for a long time, increasing the loss of electric energy and requiring frequent maintenance and replacement of the fan, which is not conducive to the long-term stable operation of the system.

[0033] The dust ash collected in the first dust collector 260 and the second dust collector 270 is transported to the fine material bin 140 by the dust ash conveying device. The nitrogen output unit 310 is connected with the first nitrogen branch pipe 320 and the second nitrogen branch pipe 330. The first nitrogen branch pipe 320 is connected to the discharge pipe of the first dust collector 260, and the second nitrogen branch pipe 330 is connected to the discharge pipe of the second dust collector 270. The discharge pipes of the first dust collector 260 and the second dust collector 270 are combined to form a nitrogen conveying main pipe 340. The dust ash is pneumatically conveyed to the fine material bin 140 by nitrogen for recycling, which not only avoids the waste of calcium carbide, but also the dust ash has a certain gas emission. If it is mixed with air during the conveying process, it will react with water in the air. At the same time, the dust ash has the risk of spontaneous combustion, which will be dangerous. Therefore, the dust ash is conveyed by inert gas nitrogen, which not only ensures the efficient conveying of the dust ash, but also improves the safety of the system.

[0034] The present application realizes the efficient collection and recycling of calcium carbide crushing dust ash through the above scheme. Calcium carbide is crushed by a crusher and transported to an acetylene generator through a first conveyor belt and a second conveyor belt for reaction. The dust generated during the crushing process is collected by a dust collection device, and the calcium carbide dust escaping from the crusher and the feeder outlet is extracted by a negative pressure through a first fan, and transported to the first dust collector for collection. At the same time, the separation escaping from the top of the silo is extracted by a second fan and transported to the second dust collector for dust removal, and the obtained dust is collected at the bottom of the second dust collector. Finally, the dust collected in the first dust collector and the second dust collector (i.e., calcium carbide crushing dust ash) is transported to a fine material bin through a dust conveying device, and is input into an acetylene generator as a raw material for the production of acetylene. Not only is the environmental pollution caused by the calcium carbide dust escaping in the air avoided, which helps to make the production environment cleaner and safer, but the calcium carbide dust is also recycled, thereby improving the utilization rate of calcium carbide. The dust ash is pneumatically transported to the fine material bin by nitrogen for recycling, which not only avoids the waste of calcium carbide, but also transports the dust ash by inert gas nitrogen, which ensures the efficient transportation of the dust ash and improves the safety of the system.

[0035] like Figure 2 As shown, optionally, the nitrogen output unit 310 includes a low-pressure nitrogen storage tank 311, a nitrogen compressor 312 and a high-pressure nitrogen storage tank 313 which are connected in sequence, the air inlet of the low-pressure nitrogen storage tank 311 is connected to a nitrogen pipeline network, and the air outlet of the high-pressure nitrogen storage tank 313 is connected to the air inlets of the first nitrogen branch pipe 320 and the second nitrogen branch pipe 330 respectively.

[0036] Specifically, the low-pressure nitrogen storage tank 311 is used to receive low-pressure nitrogen from the nitrogen pipeline network, and compress the low-pressure nitrogen through the nitrogen compressor 312 to obtain high-pressure nitrogen, which is then transported to the high-pressure nitrogen storage tank 313 for storage, and then transported to the first nitrogen branch pipe 320 and the second nitrogen branch pipe 330 through the high-pressure nitrogen storage tank 313 for transporting dust. The dust is transported by high-pressure nitrogen, which improves the safety of the dust transportation process.

[0037] like Figure 2 As shown, optionally, the nitrogen output unit 310 also includes a nitrogen recovery pipeline 350, the top of the fine material bin 140 is connected to the inlet end of the nitrogen recovery pipeline 350 through a filter 351, and the outlet end of the nitrogen recovery pipeline 350 is connected to the air inlet of the low-pressure nitrogen storage tank 311.

[0038] Specifically, in the nitrogen delivery main pipe 340, nitrogen and dust ash are delivered to the fine material bin 140 together, and the dust ash falls into the fine material bin 140 under the action of gravity, and the nitrogen is output through the nitrogen recovery pipeline 350. Before the nitrogen enters the nitrogen recovery pipeline 350, it is filtered by the filter 351, and a small amount of dust ash particles carried in the nitrogen fall back into the fine material bin 140 under the obstruction of the filter 351, and the clean nitrogen is delivered back to the low-pressure nitrogen storage tank 311 through the nitrogen recovery pipeline 350, and is used for the delivery of dust ash after passing through the nitrogen compressor 312 again. This arrangement avoids the waste of nitrogen, improves the efficiency of nitrogen use, and reduces the cost of the enterprise in the process of dust ash delivery.

[0039] like Figure 3 As shown, optionally, a first nitrogen regulating valve 321 is provided on the first nitrogen branch pipe 320 , and a second nitrogen regulating valve 331 is provided on the second nitrogen branch pipe 330 .

[0040] Specifically, the first nitrogen regulating valve 321 is used to regulate the nitrogen flow entering the first nitrogen branch pipe 320, and the second nitrogen regulating valve 331 is used to regulate the nitrogen flow entering the second nitrogen branch pipe 330, which is convenient for real-time regulation of nitrogen and contributes to the rational and efficient use of nitrogen.

[0041] like Figure 3 As shown, optionally, a first ash hopper 261 is provided at the bottom of the first dust collector 260, a first material level meter 262 is provided in the first ash hopper 261, and a first discharge valve 263 is provided on the discharge pipe of the first ash hopper 261. A second ash hopper 271 is provided at the bottom of the second dust collector 270, a second material level meter 272 is provided in the second ash hopper 271, and a second discharge valve 273 is provided on the discharge pipe of the second ash hopper 271.

[0042] Specifically, the dust collected by the first dust collector 260 is collected in the first ash hopper 261, and the first material level meter 262 is used to detect the amount of dust collected in the first ash hopper 261, and the first discharge valve 263 is opened and closed according to the material level reading of the first material level meter 262. Similarly, the second ash hopper 271 is used to collect the dust collected by the second dust collector 270, and the second material level meter 272 is used to detect the amount of dust collected in the second ash hopper 271 in real time, and the opening and closing of the second discharge valve 273 is determined according to the material level reading of the second ash hopper 271.

[0043] Further, when the first material level meter 262 reaches the first preset material level, the first discharge valve 263 is opened, and the first nitrogen regulating valve 321 is opened at the same time, and the dust ash in the first ash hopper 261 is transported with nitrogen. When the material level indication of the second ash hopper 271 reaches the second preset material level, the second discharge valve 273 and the second nitrogen regulating valve 331 are opened, and the dust ash in the second ash hopper 271 is transported with nitrogen. In this way, the dust ash in the first dust collector 260 and the second dust collector 270 can not only be transported at the same time, but also can be transported separately. This arrangement avoids the situation that when the ash hopper in one of the dust collectors needs to be transported, the amount of dust ash in the other ash hopper is small. At this time, if the two nitrogen branches are opened at the same time, it will cause a waste of nitrogen. In the present application, the two nitrogen branches are operated separately, which improves the efficiency of nitrogen use and reduces the loss of nitrogen.

[0044] like Figure 3 As shown, optionally, a coarse material bin 180 is further provided between the second conveyor belt 150 and the fine material bin 140 , the discharge end of the second conveyor belt 150 is located above the top feed port of the coarse material bin 180 , and a filter screen 181 is provided on the pipeline between the coarse material bin 180 and the fine material bin 140 .

[0045] Specifically, a filter screen 181 is provided on the pipeline between the coarse material bin 180 and the fine material bin 140, so that the calcium carbide particles are screened before entering the acetylene generator 170, and the calcium carbide particles that meet the acetylene production are screened to avoid the entry of larger calcium carbide particles, which will cause the calcium carbide particles to be too large and the reaction to be incomplete. At the same time, the reaction efficiency of the calcium carbide is improved.

[0046] like Figure 3 As shown, optionally, the filter screen plate 181 is inclined relative to the horizontal plane, and a large-particle calcium carbide outlet 182 is provided at the connection between the pipeline between the coarse material bin 180 and the fine material bin 140 and the lower end of the filter screen plate 181, and a large-particle calcium carbide tank 183 is provided at the lower end of the large-particle calcium carbide outlet 182.

[0047] Specifically, the filter plate 181 is inclined relative to the horizontal plane, so that calcium carbide with a particle size smaller than the filter holes of the filter plate 181 can enter the fine material bin 140, and calcium carbide with larger particles can fall from the large-particle calcium carbide outlet 182 to the large-particle calcium carbide tank 183 with the help of the inclined surface of the filter plate 181.

[0048] Furthermore, a vibrator is provided on the bottom surface of the filter screen plate 181 to accelerate the screening of calcium carbide. The calcium carbide in the large-particle calcium carbide tank 183 is transported back to the crusher 110 by a conveyor belt or a transport vehicle for further crushing.

[0049] Furthermore, a plurality of crushers 110 are arranged in sequence, and a transmission device is arranged between the plurality of crushers 110 for crushing the calcium carbide step by step, which reduces the load of the crusher 110 and contributes to the long-term stable operation of the system.

[0050] Optionally, a fourth dust collecting hood 190 is provided at the upper end of the large-particle calcium carbide outlet 182 , and the top of the fourth dust collecting hood 190 is connected to the first dust pipeline 280 through the third dust pipeline 191 .

[0051] Specifically, during the screening process of the filter plate 181 and when large-particle calcium carbide falls into the large-particle calcium carbide tank 183, calcium carbide dust will escape. Therefore, through the fourth dust collection hood 190, the dust escaping from the large-particle calcium carbide outlet 182 is sucked into the first dust collector 260 through the first fan 240, further reducing the escape of dust.

[0052] The technical solution of the present application is described in detail below with reference to specific embodiments.

[0053] The operation process of the calcium carbide crushing dust removal system in this embodiment is as follows:

[0054] Calcium carbide crushing: Calcium carbide is input into the crusher 110 for crushing, and the crushed calcium carbide is input into the silo 130 for storage through the first conveyor belt 120. When in use, the calcium carbide in the silo 130 is fed to the second conveyor belt 150 through the feeder 160, and the calcium carbide particles are sent to the coarse material bin 180 through the second conveyor belt 150. The calcium carbide in the coarse material bin 180 is filtered through the filter screen 181 and enters the fine material bin 140. The calcium carbide particles in the fine material bin 140 are quantitatively input into the acetylene generator 170 to realize the production of acetylene. The calcium carbide with larger particles falls from the calcium carbide large particle outlet 182 to the large particle calcium carbide tank 183 with the help of the inclined surface of the filter screen 181, and is transported back to the crusher 110 through the conveyor belt or the transport vehicle for crushing again.

[0055] Dust collection: The first fan 240 provides negative pressure to extract the calcium carbide dust escaping from the discharge ports of the crusher 110 and the feeder 160 through negative pressure and transport it to the first dust collector 260 for collection. The dust escaping from the large-particle calcium carbide outlet 182 is extracted into the first dust collector 260 through the fourth dust collection hood 190 through the first fan 240. At the same time, the dust escaping from the top of the silo 130 is extracted through the second fan 250 and transported to the second dust collector 270 for dust removal, and the obtained dust is collected at the bottom of the second dust collector 270. Finally, the dust ash collected in the first dust collector 260 and the second dust collector 270 (i.e., the dust ash from the crushing of calcium carbide) is transported to the fine material bin 140 and input into the acetylene generator 170 as raw material for the production of acetylene.

[0056] Pneumatic conveying of dust ash: The low-pressure nitrogen storage tank 311 is used to receive low-pressure nitrogen from the nitrogen pipeline network, and compress the low-pressure nitrogen through the nitrogen compressor 312 to obtain high-pressure nitrogen and transport it to the high-pressure nitrogen storage tank 313 for storage, and then transport it to the first nitrogen branch pipe 320 and the second nitrogen branch pipe 330 respectively through the high-pressure nitrogen storage tank 313 for conveying dust ash. When the first material level meter 262 reaches the first preset material level, the first discharge valve 263 is opened, and the first nitrogen regulating valve 321 is opened at the same time to convey the dust ash in the first ash hopper 261 with nitrogen. When the material level indication of the second ash hopper 271 reaches the second preset material level, the second discharge valve 273 and the second nitrogen regulating valve 331 are opened to convey the dust ash in the second ash hopper 271 with nitrogen. The dust ash in the first dust collector 260 and the second dust collector 270 can not only be transported at the same time, but also can be transported separately.

[0057] Nitrogen recovery: In the nitrogen delivery main pipe 340, nitrogen and dust ash are delivered to the fine material bin 140 together, and the dust ash falls into the fine material bin 140 under the action of gravity, and the nitrogen is output through the nitrogen recovery pipeline 350. Before the nitrogen enters the nitrogen recovery pipeline 350, it is filtered by the filter 351, and a small amount of dust ash particles carried in the nitrogen fall back into the fine material bin 140 under the obstruction of the filter 351, and the clean nitrogen is delivered back to the low-pressure nitrogen storage tank 311 through the nitrogen recovery pipeline 350, and is used for the delivery of dust ash after passing through the nitrogen compressor 312 again.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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 application.

Claims

1. A calcium carbide crushing dust removal ash treatment system, characterized in that: include: A calcium carbide crushing device, a dust collection device and a dust conveying device; the calcium carbide crushing device comprises a crusher (110), a first conveyor belt (120), a silo (130), a fine material silo (140) and a second conveyor belt (150); the first conveyor belt (120) is arranged between the crusher (110) and the silo (130); a feeder (160) is connected to a feeder port of the silo (130); the second conveyor belt (150) is arranged between the feeder (160) and the fine material silo (140); an acetylene generator (170) is connected to an outlet of the fine material silo (140); The dust collection device comprises a first dust collection hood (210) arranged above the crusher (110), a second dust collection hood (220) arranged at the discharge port of the feeder (160), a third dust collection hood (230) arranged above the silo (130), a first fan (240), a second fan (250), a first dust collector (260) and a second dust collector (270), wherein the first dust collection hood (210) and the second dust collection hood (220) are both connected to a first dust pipeline (280) through pipelines, the first fan (240) is connected between the output end of the first dust pipeline (280) and the first dust collector (260), the third dust collection hood (230) is connected to the second dust collector (270) through a second dust pipeline (290), and the second fan (250) is connected to the second dust pipeline (290); The dust removal ash conveying device comprises a nitrogen output unit (310), a first nitrogen branch pipe (320), a second nitrogen branch pipe (330) and a nitrogen conveying main pipe (340). The nitrogen output unit (310) is respectively connected to the first nitrogen branch pipe (320) and the second nitrogen branch pipe (330). The first nitrogen branch pipe (320) is connected to the discharge pipe of the first dust collector (260), and the second nitrogen branch pipe (330) is connected to the discharge pipe of the second dust collector (270). The discharge pipes of the first dust collector (260) and the second dust collector (270) are combined to form the nitrogen conveying main pipe (340). The output end of the nitrogen conveying main pipe (340) is connected to the inlet of the fine material bin (140).

2. The calcium carbide crushing dust treatment system according to claim 1 is characterized in that: The nitrogen output unit (310) comprises a low-pressure nitrogen storage tank (311), a nitrogen compressor (312) and a high-pressure nitrogen storage tank (313) which are connected in sequence, the air inlet of the low-pressure nitrogen storage tank (311) is connected to a nitrogen pipe network, and the air outlet of the high-pressure nitrogen storage tank (313) is respectively connected to the air inlets of the first nitrogen branch pipe (320) and the second nitrogen branch pipe (330).

3. The calcium carbide crushing dust treatment system according to claim 2 is characterized in that: The nitrogen output unit (310) further comprises a nitrogen recovery pipeline (350), the top of the fine material bin (140) is connected to the inlet end of the nitrogen recovery pipeline (350) via a filter (351), and the outlet end of the nitrogen recovery pipeline (350) is connected to the air inlet of the low-pressure nitrogen storage tank (311).

4. The calcium carbide crushing dust treatment system according to claim 1 is characterized in that: The first nitrogen branch pipe (320) is provided with a first nitrogen regulating valve (321), and the second nitrogen branch pipe (330) is provided with a second nitrogen regulating valve (331).

5. The calcium carbide crushing dust treatment system according to claim 1 is characterized in that: A first ash hopper (261) is arranged at the bottom of the first dust collector (260), a first material level meter (262) is arranged in the first ash hopper (261), and a first discharge valve (263) is arranged on the discharge pipe of the first ash hopper (261); a second ash hopper (271) is arranged at the bottom of the second dust collector (270), a second material level meter (272) is arranged in the second ash hopper (271), and a second discharge valve (273) is arranged on the discharge pipe of the second ash hopper (271).

6. The calcium carbide crushing dust treatment system according to claim 1 is characterized in that: A coarse material bin (180) is also provided between the second conveyor belt (150) and the fine material bin (140); the discharge end of the second conveyor belt (150) is located above the top feed port of the coarse material bin (180); and a filter screen (181) is provided on the pipeline between the coarse material bin (180) and the fine material bin (140).

7. The calcium carbide crushing dust treatment system according to claim 6 is characterized in that: The filter screen plate (181) is arranged to be inclined relative to a horizontal plane, and a large-grain calcium carbide outlet (182) is provided at a connection point between the pipeline between the coarse material bin (180) and the fine material bin (140) and the lower end of the filter screen plate (181), and a large-grain calcium carbide tank (183) is provided at the lower end of the large-grain calcium carbide outlet (182).

8. The calcium carbide crushing dust treatment system according to claim 7 is characterized in that: A fourth dust collecting hood (190) is provided at the upper end of the large-particle calcium carbide outlet (182), and the top of the fourth dust collecting hood (190) is connected to the first dust pipeline (280) via a third dust pipeline (191).

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