Pulverized coal explosion suppression collecting system
By using cryogenic nitrogen injection and vibration anti-blocking mechanism in the pulverized coal collection system, the problems of pulverized coal combustion and blockage are solved, and safe and reliable pulverized coal collection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-24
AI Technical Summary
The heat generated during the grinding of pulverized coal cannot be dissipated in time, leading to the risk of combustion and explosion. Furthermore, the small particle size makes it easy to clog the discharge port, resulting in difficulties in feeding.
The system employs a low-temperature nitrogen injection cooling and vibration anti-clogging mechanism. Low-temperature nitrogen is injected through a cooling jet pipe around the inner wall of the dust collection box to create an inert atmosphere and prevent combustion and explosion. A vibration motor is used to prevent coal dust from adhering and clogging.
It effectively prevents coal powder from exploding, keeps the coal powder in a loose state, reduces blockages, and ensures smooth discharge.
Smart Images
Figure CN224025223U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to activated carbon processing equipment technical field especially relates to a coal powder explosion suppression collection system. BACKGROUND
[0002] The activated carbon is formed after coal powder and binder are through mixing, granulation, carbonization, activation etc. process. The coal block needs to be ground by the flour mill first, and then is sucked into the coal powder collection system by the negative pressure fan. Then the coal powder and the binder are mixed and kneaded according to the proportion. A large amount of heat is generated in the grinding process of the coal powder, and after entering the coal powder collection system, the heat of the coal powder in the system cannot be dissipated in time, and there is a risk of combustion and explosion during the contact with air. At the same time, due to the very small particle size of the coal powder, the discharge port is easily blocked during discharging, resulting in difficult discharging. SUMMARY
[0003] Therefore, it is necessary to provide a coal powder explosion suppression collection system suitable for the preparation process of activated carbon.
[0004] A coal powder explosion suppression collection system comprises a flour mill, a conveying pipeline, a powder collecting box, a negative pressure fan, a coal powder collecting mechanism and an explosion suppression and anti-blocking mechanism. The discharge port of the flour mill is communicated with one end of the conveying pipeline, the other end of the conveying pipeline is communicated with the feed port of the powder collecting box, and the air outlet of the powder collecting box is connected with the negative pressure fan to suck the coal powder into the flour mill through the negative pressure fan. The coal powder collecting mechanism is arranged in the powder collecting box to collect and store the coal powder. The explosion suppression and anti-blocking mechanism is arranged above the discharge port of the powder collecting box. The explosion suppression and anti-blocking mechanism comprises a cooling air jet pipeline, a nitrogen buffer tank and a low-temperature nitrogen pipeline. The cooling air jet pipeline is located directly above the discharge port of the powder collecting box. The cooling air jet pipeline is provided with air outlets and surrounds the inner wall of the powder collecting box. The air inlet of the cooling air jet pipeline is connected with the nitrogen buffer tank through a pipeline. The air inlet of the nitrogen buffer tank is connected with the low-temperature nitrogen pipeline. The low-temperature nitrogen pipeline is used for conveying low-temperature nitrogen from the outside.
[0005] Preferably, the cooling air jet pipeline is annular, and the air outlets are inclined downward and uniformly distributed on the cooling air jet pipeline.
[0006] Preferably, the coal powder collecting mechanism comprises a coal powder partition plate, a cylindrical support and a filter screen. The coal powder partition plate is located in the middle of the powder collecting box and divides the powder collecting box into an upper chamber and a lower chamber. The lower chamber of the powder collecting box collects the coal powder. The partition plate is uniformly provided with a plurality of air vents. The cylindrical support is fixedly connected with the edge of the air vent. The filter screen is sleeved on the cylindrical support and is used for filtering the coal powder. The lower chamber is funnel-shaped. The side wall of the lower chamber is provided with a feed port and is connected with the conveying pipeline. The bottom of the lower chamber is provided with a discharge port. The side wall of the upper chamber is provided with an air outlet and is communicated with the negative pressure fan.
[0007] Preferably, the pulverized coal explosion suppression collecting system further comprises a vibration anti-blocking mechanism arranged on the outer wall of the lower chamber of the powder collecting box, and the vibration anti-blocking mechanism comprises a motor support and a vibration motor, the motor support is fixedly connected with the outer wall of the powder collecting box, and the vibration motor is arranged on the motor support.
[0008] Preferably, the motor support is provided with an adjusting groove, and the vibration motor is arranged on the adjusting groove to adjust the horizontal position of the vibration motor.
[0009] Beneficial effects: the pulverized coal explosion suppression collecting system can cool the pulverized coal through low-temperature nitrogen and discharge air, can effectively prevent the pulverized coal from exploding under the low-temperature inert gas atmosphere, and can keep the pulverized coal in a relatively fluffy state in the process of continuously introducing low-temperature nitrogen, so that the pulverized coal is less likely to adhere to the inner wall of the powder collecting box, and is more likely to go out of the discharge port, thereby reducing the blocking probability of the discharge port. BRIEF DESCRIPTION OF DRAWINGS
[0010] Figure 1 It is a structure schematic view of the pulverized coal explosion suppression collecting system.
[0011] Figure 2 It is a sectional view of the pulverized coal explosion suppression collecting system.
[0012] In the drawing: the pulverized coal explosion suppression collecting system 10, the pulverizing machine 20, the conveying pipeline 30, the powder collecting box 40, the upper chamber 401, the lower chamber 402, the negative pressure fan 50, the pulverized coal collecting mechanism 60, the pulverized coal partition plate 601, the filter screen 602, the explosion suppression anti-blocking mechanism 70, the cooling jet pipeline 701, the nitrogen buffer tank 702, the low-temperature nitrogen pipeline 703, the vibration anti-blocking mechanism 80, the motor support 801 and the vibration motor 802. DETAILED DESCRIPTION
[0013] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows, and obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0014] Please refer to Figure 1 and Figure 2The coal powder explosion suppression and collection system 10 comprises a pulverizer 20, a conveying pipeline 30, a powder collecting box 40, a negative pressure fan 50, a coal powder collecting mechanism 60 and an explosion suppression and anti-blocking mechanism 70.
[0015] The pulverizer 20 is used for grinding the granular coal into powder.
[0016] The powder collecting box 40 is made of iron or aluminum material.
[0017] The coal powder collecting mechanism 60 is used for separating the coal powder from air, and the air and the coal powder are separated by a separation film, air-permeable cloth or filter screen.
[0018] The explosion suppression and anti-blocking mechanism 70 is used for preventing the heat of the coal powder from gathering and causing combustion and explosion.
[0019] In a preferable embodiment, the cooling air jet pipeline 701 is annular, and the air outlets are inclined downward and uniformly distributed on the cooling air jet pipeline 701.
[0020] Since the nitrogen is continuously jetted and the air outlets are inclined downward, the coal powder cannot enter the cooling air jet pipeline 701.
[0021] In a preferred embodiment, the coal dust collecting mechanism 60 comprises a coal dust baffle 601, a cylindrical support, and a filter screen 602, the coal dust baffle 601 is located in the middle of the dust collecting box 40 and divides the dust collecting box 40 into an upper chamber 401 and a lower chamber 402, the lower chamber 402 of the dust collecting box 40 collects coal dust, the baffle is uniformly distributed with a plurality of air holes, the cylindrical support is fixedly connected with the edges of the air holes, and the filter screen 602 is sleeved on the cylindrical support and used for filtering coal dust; the lower chamber 402 is funnel-shaped, the side wall of the lower chamber 402 is provided with a feeding port and is connected with the conveying pipeline 30, and the bottom of the lower chamber 402 is provided with a discharging port; the side wall of the upper chamber 401 is provided with an air outlet and is in communication with the negative pressure fan 50.
[0022] In a preferred embodiment, the coal dust baffle 601 of the utility model is made of stainless steel, has the characteristics of corrosion resistance, high temperature resistance and impact resistance. Similarly, the cylindrical support is also made of stainless steel. The cylindrical support and the filter screen 602 jointly act on the space formed in the cylindrical support and the space above the coal dust baffle 601, the coal dust is separated by the filter screen 602 and falls to the bottom of the dust collecting box 40, the air passes through the filter screen 602 and flows out along the direction of extraction of the negative pressure fan 50, and then enters the next process for further purification. The material of the filter screen 602 is preferably cotton.
[0023] After a long time of operation, coal dust may still adhere to the inner wall of the dust collecting box 40. In order to prevent the coal dust from blocking the discharging port after a long time of accumulation, further, in a preferred embodiment, the coal dust explosion suppression collecting system 10 further comprises a vibration anti-blocking mechanism 80, the vibration anti-blocking mechanism 80 is arranged on the outer wall of the lower chamber 402 of the dust collecting box 40, and the vibration anti-blocking mechanism 80 comprises a motor support 801 and a vibration motor 802, the motor support 801 is fixedly connected with the outer wall of the dust collecting box 40, and the vibration motor 802 is arranged on the motor support 801.
[0024] In a preferred embodiment, the motor support 801 is provided with an adjusting groove, and the vibration motor 802 is arranged on the adjusting groove to adjust the horizontal position of the vibration motor 802.
[0025] If the vibration motor 802 is fixed in the same position for a long time, the inner wall of the dust collecting box 40 at the position will be concave, causing damage to the device. By arranging the adjusting groove, the position of the vibration motor 802 can be adjusted, thereby prolonging the service life of the dust collecting box 40.
[0026] The vibration anti-blocking mechanism 80 of the utility model can be arranged on one side of the dust collecting box 40 and affect other sides through kinetic energy transmission, or vibration anti-blocking mechanisms 80 can be arranged on all four sides of the dust collecting box 40.
[0027] The above disclosed is only the preferred embodiment of the present application, of course, cannot be limited by this to limit the scope of the present application, the person skilled in the art can understand that all or part of the processes of the above embodiment are realized, and the equivalent changes made according to the present application claims still belong to the scope covered by the present application.
Claims
1. A pulverized coal explosion suppression and collection system, characterized in that: The system includes a grinding mill, a conveying pipeline, a dust collection box, a negative pressure fan, a coal dust collection mechanism, and an explosion suppression and anti-blocking mechanism. The discharge port of the grinding mill is connected to one end of the conveying pipeline, and the other end of the conveying pipeline is connected to the inlet of the dust collection box. The air outlet of the dust collection box is connected to the negative pressure fan to draw coal dust into the grinding mill. The coal dust collection mechanism is located in the dust collection box to collect and store coal dust. The explosion suppression and anti-blocking mechanism is located above the discharge port of the dust collection box and includes a cooling jet pipe, a nitrogen buffer tank, and a low-temperature nitrogen pipe. The cooling jet pipe is located directly above the discharge port of the dust collection box and has a jet nozzle that surrounds the inner wall of the dust collection box. The air inlet of the cooling jet pipe is connected to the nitrogen buffer tank via a pipe, and the air inlet of the nitrogen buffer tank is connected to the low-temperature nitrogen pipe, which is used to transport low-temperature nitrogen from the outside.
2. The pulverized coal explosion suppression and collection system as described in claim 1, characterized in that: The cooling jet pipe is ring-shaped, and the jet nozzles are evenly distributed on the cooling jet pipe at an angle downwards.
3. The pulverized coal explosion suppression and collection system as described in claim 1, characterized in that: The coal dust collection mechanism includes a coal dust baffle, a cylindrical support, and a filter screen. The coal dust baffle is located in the middle of the collection box and divides the collection box into an upper chamber and a lower chamber. The lower chamber of the collection box collects coal dust. The baffle has several vent holes evenly distributed on it. The cylindrical support is fixedly connected to the edge of the vent holes. The filter screen is fitted on the cylindrical support and is used to filter coal dust. The lower chamber is funnel-shaped. The side wall of the lower chamber has an inlet that is connected to a conveying pipe. The bottom of the lower chamber has an outlet. The side wall of the upper chamber has an outlet that is connected to a negative pressure fan.
4. The pulverized coal explosion suppression and collection system as described in claim 1, characterized in that: The pulverized coal explosion suppression and collection system also includes a vibration anti-blocking mechanism, which is installed on the outer wall of the lower chamber of the dust collection box. The vibration anti-blocking mechanism includes a motor bracket and a vibration motor. The motor bracket is fixedly connected to the outer wall of the dust collection box, and the vibration motor is installed on the motor bracket.
5. The pulverized coal explosion suppression and collection system as described in claim 4, characterized in that: The motor bracket is provided with an adjustment groove, and the vibration motor is mounted on the adjustment groove to adjust the horizontal position of the vibration motor.