A device and method for heat preservation storage of dry carbide slag suitable for high-altitude cold areas

Abstract

The present invention discloses a device and method for heat-insulating storage of dry carbide slag suitable for use in high-altitude cold regions. The device comprises a feeding pipe, a carbide slag storage tank, a discharge pipe, a fluidizing pipe, a silo top dust collector, an air preheater, an axial flow fan, and a compressed air storage tank. The discharge end of the feeding pipe is connected to the top of the carbide slag storage tank, the feed end of the discharge pipe is connected to the bottom of the carbide slag storage tank, the air outlet end of the fluidizing pipe is connected to the bottom of the carbide slag storage tank, the axial flow fan is mounted at the air inlet end of the fluidizing pipe, and the air preheater is mounted on the fluidizing pipe. The silo top dust collector is mounted on the top of the carbide slag storage tank. While ensuring that explosions caused by accumulation of acetylene gas are avoided, the present invention greatly simplifies the entire storage device, heats the air transported by the axial flow fan, prevents the carbide slag powder from accumulating due to low air temperature, avoids clogging of the discharge pipe, and simultaneously eliminates the phenomenon of carbide slag powder clinging to the wall.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical insulation equipment, and more particularly to a dry carbide slag insulation storage device and method suitable for use in high-altitude cold areas. Background Art

[0002] Calcium carbide slag is a Class II general industrial solid waste. If it is discharged directly into seawalls or valleys, or if it is stored in a regular manner using landfill or ditch filling, it often leads to soil and shallow groundwater contamination, causing soil salinization and salination. With the country's increasing emphasis on environmental protection, the traditional storage method for calcium carbide slag has evolved from the initial pit landfill to closed storage, which prevents secondary pollution of the soil and atmosphere. However, since calcium carbide slag is an industrial waste produced during the reaction of calcium carbide and water to produce acetylene gas, it contains a large amount of calcium oxide and small amounts of silicon, iron, aluminum, calcium, magnesium, and carbon residue. The solution generally also contains other impurities such as sulfides, phosphides, magnesium, and acetylene. Therefore, this alkaline calcium carbide slag has physical properties such as high viscosity, fine particle size, and easy flow. Traditional storage methods not only have high infrastructure costs and require a large area of ​​land, but also suffer from problems such as dripping, flowing, sticking, and hanging.

[0003] With the development of carbide slag storage technology, many institutions have proposed their own methods to address key issues such as acetylene gas accumulation in carbide slag storage systems leading to explosions, wall hanging, and carbide slag agglomeration leading to material discharge blockage. For example, patent CN102557499A discloses a carbide slag dry powder anti-blocking device. The device is used in conjunction with a unloading device, a buffer bin, a sealed discharge barrel, a three-way distributing valve and an elevator to keep the carbide slag powder in a flowing state at all times to prevent the carbide slag powder from agglomerating and causing poor material discharge. However, the device ignores the phenomenon of carbide slag powder agglomeration and wall hanging caused by the condensation of moisture in the carbide slag powder when the outdoor temperature is low in winter, and cannot effectively prevent blockage caused by low outdoor temperature in northern winter. In addition, patent CN110844372A discloses a steam insulation system for a dry calcium carbide slag warehouse. By heating the inflation air at the bottom of the warehouse and providing heat insulation through the zipper machine and dust collector on the top of the warehouse, the calcium carbide slag will not agglomerate due to low temperature. However, the device does not protect its inflation device. When the air output is insufficient, calcium carbide slag powder will enter the device and cause air path blockage.

[0004] Therefore, how to provide a dry carbide slag insulation storage device and method suitable for high-altitude cold areas is a problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] In view of this, the present invention provides a device and method for heat-insulating storage of dry carbide slag suitable for high-altitude and cold areas. Under the premise of avoiding explosions caused by accumulation of acetylene gas, the entire storage device is simplified to the greatest extent, equipment investment is reduced, and air preheating is adopted to heat the air transported by the axial flow fan, so that the carbide slag powder will not aggregate due to the low air temperature, avoid clogging the unloading pipe, and at the same time eliminate the phenomenon of carbide slag powder hanging on the wall.

[0006] In order to achieve the above solution, the present invention adopts the following technical solutions:

[0007] A dry calcium carbide slag insulation storage device suitable for high-altitude cold areas, comprising a feeding pipe, a calcium carbide slag storage tank, a discharging pipe, a fluidizing pipe, a silo top dust collector, an air preheater, an axial flow fan and a compressed air storage tank; wherein the discharge end of the feeding pipe is connected to the top of the calcium carbide slag storage tank, and the feed end of the discharging pipe is connected to the bottom of the calcium carbide slag storage tank; the air outlet end of the fluidizing pipe is connected to the bottom of the calcium carbide slag storage tank, the axial flow fan is installed at the air inlet end of the fluidizing pipe, and the air preheater is installed on the fluidizing pipe; the silo top dust collector is installed on the top of the calcium carbide slag storage tank; the air outlet of the compressed air storage tank is connected to the feeding pipe and the discharging pipe through a feeding air supply pipe and a discharging air supply pipe respectively, and the compressed air storage tank is used to provide power for feeding and unloading. The use of pneumatic feeding can reduce the friction between the calcium carbide slag and the pipe, and prevent the generation of sparks and explosions.

[0008] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, the bottom of the carbide slag storage tank is a collecting part, which is an inverted frustum; the feed end of the discharge pipe is connected to the center of the bottom surface of the collecting part, and a discharge gate valve is provided on the discharge pipe.

[0009] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, the fluidized pipe includes a fluidized main pipe and a plurality of fluidized branch pipes connected to the fluidized main pipe, and the fluidized main pipe is connected to the carbide slag storage tank through the fluidized branch pipes; the air outlet ends of the plurality of fluidized branch pipes are evenly distributed on the bottom and side surfaces of the collecting part; and the air preheater is installed on the fluidized main pipe.

[0010] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, the fluidized branch pipes are respectively provided with check valves, which are installed at the connection between the carbide slag storage tank and the fluidized pipe to prevent carbide slag powder from entering the fluidized pipe when the axial flow fan has insufficient output, causing the fluidized pipe to be blocked; the fluidized main pipe is provided with a first acetylene concentration detector to prevent acetylene gas from diffusing into the fluidized pipe and exploding when encountering an air preheater.

[0011] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, a loading air supply solenoid valve is provided on the loading air supply pipeline, and a unloading air supply solenoid valve is provided on the unloading air supply pipeline.

[0012] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, the inner top of the carbide slag storage tank is also provided with a second acetylene concentration detector, a temperature monitor and an exhaust solenoid valve; and the side of the carbide slag storage tank is provided with a level meter.

[0013] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, the axial flow fan is a variable frequency axial flow fan.

[0014] Preferably, in the above-mentioned dry calcium carbide slag insulation storage device suitable for high-altitude and cold areas, the silo top dust collector, the air preheater, the axial flow fan, the first acetylene concentration detector, the loading air supply solenoid valve, the unloading air supply solenoid valve, the second acetylene concentration detector, the temperature monitor, the exhaust solenoid valve and the level meter are respectively electrically connected to the PLC controller through wires, and the PLC controller is connected to a power supply and an audible and visual alarm.

[0015] Preferably, in the above-mentioned dry carbide slag insulation storage device suitable for high-altitude cold areas, a feeding gate valve is provided at the feeding end of the feeding pipe, and a filter is provided at the feeding port of the feeding pipe. The filter can prevent clumped carbide slag from entering the carbide slag storage tank and causing blockage of the carbide slag storage tank.

[0016] A method for heat preservation and storage of dry carbide slag suitable for high-altitude cold areas comprises the following steps:

[0017] Step 1: open the feeding gate valve, open the feeding air supply solenoid valve of the compressed air storage tank through the PLC controller, adjust the silo top dust collector on the top of the calcium carbide slag storage tank to the normally open state, use the high-pressure airflow in the compressed air storage tank to transport the calcium carbide slag powder, adopt pneumatic feeding, after the calcium carbide slag powder is filtered out of large particles by the filter screen, it is transported to the calcium carbide slag storage tank through the feeding pipeline, and when the level meter indicates that the calcium carbide slag level reaches 70%-80% of the overall volume, stop feeding; close the feeding gate valve, close the feeding air supply solenoid valve of the compressed air storage tank through the PLC controller, and adjust the silo top dust collector on the top of the calcium carbide slag storage tank to the normal working state;

[0018] Step 2: The PLC controller starts the variable frequency axial flow fan to transport air through the fluidization pipe to the collection part of the carbide slag storage tank, so that the carbide slag powder reaches a fluidized state in the carbide slag storage tank. At the same time, the air in the carbide slag storage tank flows, causing the acetylene gas to be discharged through the silo top dust collector, thereby reducing the acetylene concentration in the tank.

[0019] Step 3: Use a temperature detector to monitor the temperature in the carbide slag storage tank and send the temperature information to the PLC controller. When the temperature is lower than 0°C, the PLC controller controls the air preheater to turn on, heats the air to 15-20°C, and transports the air to the carbide slag storage tank through the fluidized pipe to fluidize the carbide slag powder.

[0020] Step 4, when the second acetylene concentration detector detects that the acetylene concentration in the carbide slag storage tank reaches the explosion limit, the PLC controller controls the sound and light alarm to sound an alarm, and opens the exhaust solenoid valve to carry out emergency exhaust; When the first acetylene detector detects that there is acetylene gas in the fluidized pipe, the PLC controller controls the sound and light alarm to sound an alarm, and simultaneously the PLC controller controls the air preheater to close, and controls the variable frequency axial flow fan to increase the frequency;

[0021] Step 5. When the carbide slag powder needs to be discharged, maintain the air supply of the fluidized pipe, open the discharge gate valve, open the discharge air supply solenoid valve of the compressed air storage tank through the PLC controller, use the high-pressure airflow in the compressed air storage tank to transport the carbide slag powder, and use pneumatic unloading to discharge the carbide slag powder in the carbide slag storage tank through the discharge end of the discharge pipe.

[0022] Through the above technical solution, it can be known that compared with the prior art, the present invention discloses a dry carbide slag insulation storage device and method suitable for high-altitude cold areas. By adopting the dry carbide slag insulation storage device suitable for high-altitude cold areas, it has the advantages of saving infrastructure costs, small footprint, and reducing the pollution caused by the accumulation of carbide slag to the environment. It effectively avoids the dangerous situation of acetylene gas overflowing from carbide slag and causing explosion when encountering open flames. At the same time, by adding related devices such as air preheaters, the influence of ambient temperature on the agglomeration of carbide slag is weakened. It solves the problems of blockage of discharge pipes and poor discharge caused by carbide slag hanging on the wall and agglomeration during storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0024] Figure 1 The accompanying drawing is a schematic structural diagram of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0026] The embodiment of the present invention discloses a device and method for heat-insulating storage of dry carbide slag suitable for use in high-altitude and cold regions. Under the premise of avoiding explosions caused by accumulation of acetylene gas, the entire storage device is simplified to the greatest extent, and equipment investment is reduced. Air preheating is adopted to heat the air transported by the axial flow fan, so that the carbide slag powder will not aggregate due to the low air temperature, thus avoiding blockage of the unloading pipeline and eliminating the phenomenon of carbide slag powder hanging on the wall.

[0027] A dry calcium carbide slag insulation storage device suitable for high-altitude cold areas, comprising a feeding pipe 1, a calcium carbide slag storage tank 2, a unloading pipe 3, a fluidizing pipe 4, a silo top dust collector 5, an air preheater 6, an axial flow fan 7 and a compressed air storage tank 8; wherein the discharge end of the feeding pipe 1 is connected to the top of the calcium carbide slag storage tank 2, and the feed end of the unloading pipe 3 is connected to the bottom of the calcium carbide slag storage tank 2; the air outlet end of the fluidizing pipe 4 is connected to the bottom of the calcium carbide slag storage tank 2, the axial flow fan 7 is installed at the air inlet end of the fluidizing pipe, and the air preheater 6 is installed on the fluidizing pipe 4; the silo top dust collector 5 is installed on the top of the calcium carbide slag storage tank 2; the air outlet of the compressed air storage tank 8 is connected to the feeding pipe 1 and the unloading pipe 3 through the feeding air supply pipe 81 and the unloading air supply pipe 82 respectively, and the compressed air storage tank 8 is used to provide power for feeding and unloading. The use of pneumatic feeding can reduce the friction between the calcium carbide slag and the pipe, and prevent the generation of sparks and explosions.

[0028] In order to further optimize the above technical solution, the bottom of the carbide slag storage tank 2 is a collecting part, which is in the shape of an inverted truncated cone; the feed end of the discharge pipe 3 is connected to the center of the bottom surface of the collecting part, and a discharge gate valve 31 is provided on the discharge pipe 3.

[0029] In order to further optimize the above technical solution, the fluidizing pipeline 4 includes a fluidizing main pipe 41 and multiple fluidizing branch pipes 42 connected to the fluidizing main pipe 41. The fluidizing main pipe 41 is connected to the carbide slag storage tank 2 through the fluidizing branch pipes 42; the air outlet ends of the multiple fluidizing branch pipes 42 are evenly distributed on the bottom and side surfaces of the converging part; the air preheater 6 is installed on the fluidizing main pipe 41.

[0030] In order to further optimize the above technical solution, a check valve 43 is respectively provided on the fluidizing branch pipe 42. The check valve 43 is installed at the connection between the carbide slag storage tank 2 and the fluidizing pipe 4 to prevent the carbide slag powder from entering the fluidizing pipe 4 when the output of the axial flow fan is insufficient, causing the fluidizing pipe 4 to be blocked; a first acetylene concentration detector 44 is provided on the fluidizing main pipe 41 to prevent acetylene gas from diffusing into the fluidizing pipe 4 and exploding when encountering the air preheater 6.

[0031] In order to further optimize the above technical solution, a loading air supply solenoid valve 83 is provided on the loading air supply pipeline 81, and a unloading air supply solenoid valve 84 is provided on the unloading air supply pipeline 82.

[0032] In order to further optimize the above technical solution, a second acetylene concentration detector 21, a temperature monitor 22 and an exhaust solenoid valve 23 are also provided on the inner top of the carbide slag storage tank 2; a level meter 24 is provided on the side of the carbide slag storage tank 2.

[0033] In order to further optimize the above technical solution, the axial flow fan 7 is a variable frequency axial flow fan.

[0034] In order to further optimize the above technical solution, the silo top dust collector 5, the air preheater 6, the axial flow fan 7, the first acetylene concentration detector 44, the loading air supply solenoid valve 83, the unloading air supply solenoid valve 84, the second acetylene concentration detector 21, the temperature monitor 22, the exhaust solenoid valve 23 and the level meter 24 are electrically connected to the PLC controller through wires, and the PLC controller is connected to a power supply and an audible and visual alarm.

[0035] In order to further optimize the above technical solution, a feeding gate valve 11 is provided at the feeding end of the feeding pipe 1, and a filter screen 12 is provided at the feeding port of the feeding pipe 1. The filter screen 12 can prevent the clumped carbide slag from entering the carbide slag storage tank 2 and causing blockage of the carbide slag storage tank 2.

[0036] In order to further optimize the above technical solution, the compressed air storage tank 8 is supplied with gas through an air pump, and the air pump is electrically connected to the PLC controller.

[0037] A method for heat preservation and storage of dry carbide slag suitable for high-altitude cold regions. Taking a 500m3 dry carbide slag storage tank in a thermal power plant using carbide slag as a desulfurizer as an example, the storage tank is 10m high. The process of disassembling the heat preservation and storage device of dry carbide slag is as follows:

[0038] Step 1: After a tank truck transporting 300m3 of carbide slag powder enters the factory, the slag powder storage tank of the carbide slag powder transport truck 9 is connected to the feed port of the feeding pipe 1, the feeding gate valve 11 is manually opened, and the feeding air supply solenoid valve 83 of the compressed air storage tank 8 is opened through the PLC controller. The top dust collector 5 on the top of the carbide slag storage tank 2 is adjusted to the normally open state, and the high-pressure air flow in the compressed air storage tank 8 is used to transport the carbide slag powder. Pneumatic feeding is adopted, and the carbide slag powder is filtered out of large particles by the filter screen 12 and then transported to the carbide slag storage through the feeding pipe 1. In tank 2, when the level meter 24 indicates that the carbide slag level reaches 70%-80% of the overall volume, stop feeding; close the feeding gate valve 11, and close the feeding air supply solenoid valve 83 of the compressed air storage tank 8 through the PLC controller, and adjust the silo top dust collector 5 on the top of the carbide slag storage tank 2 to normal working state; when the carbide slag powder is transported to the carbide slag storage tank 2 through the feeding pipe 1, there is a certain pressure difference between the inside and outside of the carbide slag storage tank 2, and the gas is discharged from the inside of the carbide slag storage tank 2 to the outside, and the dust is filtered by the silo top dust collector 5 to achieve the effect of purifying the air.

[0039] In step 2, the PLC controller controls the frequency conversion axial flow fan to start, and delivers air to the collection part of the calcium carbide slag storage tank 2 through the fluidization pipe 4, so that the calcium carbide slag powder reaches a fluidized state in the calcium carbide slag storage tank 2. At the same time, the air in the calcium carbide slag storage tank 2 flows, and acetylene gas is discharged through the silo top dust collector 5, reducing the acetylene concentration in the tank. The silo top dust collector 5 is installed on the top of the calcium carbide slag storage tank 2 to prevent the dust from leaking out when the calcium carbide slag powder is in a fluidized state inside the calcium carbide slag storage tank 2. The dust in the calcium carbide slag storage tank 2 floats up and enters the silo top dust collector 5 filter chamber for filtration. The dust adheres to the surface of the filter bag. The clean air enters the filter bag, rises to the clean air chamber, and is then discharged into the atmosphere by the fan, so that the calcium carbide slag powder reaches a fluidized state in the calcium carbide slag storage tank 2.

[0040] Step 3, using a temperature detector to monitor the temperature in the carbide slag storage tank 2, and sending the temperature information to the PLC controller. When the temperature is lower than 0°C, the PLC controller controls the air preheater 6 to turn on, heats the air to 15-20°C, and transports the air to the carbide slag storage tank 2 through the fluidizing pipe 4, so that the carbide slag powder reaches a fluidized state;

[0041] Step 4, when the second acetylene concentration detector 21 detects that the acetylene concentration in the carbide slag storage tank 2 reaches the explosion limit, the PLC controller controls the sound and light alarm to sound an alarm to remind the operating personnel; and the PLC controller controls the exhaust solenoid valve 23 to open and perform emergency exhaust; When the first acetylene detector detects the presence of acetylene gas in the fluidized pipe 4, the PLC controller controls the sound and light alarm to sound an alarm to remind the operating personnel; Simultaneously, the PLC controller controls the air preheater 6 to close, and controls the variable frequency axial flow fan to increase frequency, increases the air intake, and by accelerating the air flow in the carbide slag storage tank 2, acetylene gas is quickly discharged through the silo top dust collector 5;

[0042] Step 5, when it is necessary to discharge the carbide slag powder, maintain the air supply of the fluidizing pipe 4, manually open the unloading gate valve 31, open the unloading air supply solenoid valve 84 of the compressed air storage tank 8 through the PLC controller, use the high-pressure airflow in the compressed air storage tank 8 to transport the carbide slag powder, and use pneumatic unloading to discharge the carbide slag powder in the carbide slag storage tank 2 through the discharge end of the unloading pipe 3. The carbide slag powder will be transported from the carbide slag storage tank 2 to the carbide slag pre-mixer.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0044] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dry carbide slag heat preservation storage device suitable for high-altitude cold areas, characterized in that: It includes a feeding pipe, a carbide slag storage tank, a discharging pipe, a fluidizing pipe, a silo top dust collector, an air preheater, an axial flow fan and a compressed air storage tank; wherein the discharge end of the feeding pipe is connected to the top of the carbide slag storage tank, and the feed end of the discharging pipe is connected to the bottom of the carbide slag storage tank; the air outlet end of the fluidizing pipe is connected to the bottom of the carbide slag storage tank, the axial flow fan is installed at the air inlet end of the fluidizing pipe, and the air preheater is installed on the fluidizing pipe; the silo top dust collector is installed on the top of the carbide slag storage tank; the air outlet of the compressed air storage tank is connected to the feeding pipe and the discharging pipe through a feeding air supply pipe and a discharging air supply pipe respectively; The fluidizing pipeline includes a fluidizing main pipe and a plurality of fluidizing branch pipes connected to the fluidizing main pipe, wherein the fluidizing main pipe is connected to the carbide slag storage tank through the fluidizing branch pipes; the air preheater is installed on the fluidizing main pipe; The fluidizing branch pipes are respectively provided with check valves, and the fluidizing main pipe is provided with a first acetylene concentration detector; The loading air supply pipeline is provided with a loading air supply solenoid valve, and the unloading air supply pipeline is provided with a unloading air supply solenoid valve; The inner top of the carbide slag storage tank is also provided with a second acetylene concentration detector, a temperature monitor and an exhaust solenoid valve; A material level meter is provided on the side of the carbide slag storage tank; The silo top dust collector, the air preheater, the axial flow fan, the first acetylene concentration detector, the loading air supply solenoid valve, the unloading air supply solenoid valve, the second acetylene concentration detector, the temperature monitor, the exhaust solenoid valve and the material level meter are electrically connected to a PLC controller via wires, and the PLC controller is connected to a power supply and an audible and visual alarm; The feeding end of the feeding pipe is provided with a feeding gate valve, and the feeding port of the feeding pipe is provided with a filter screen.

2. The dry carbide slag heat preservation storage device suitable for high-altitude cold areas according to claim 1 is characterized in that: The bottom of the carbide slag storage tank is a collecting part in the shape of an inverted truncated cone; the feed end of the discharge pipe is connected to the center of the bottom surface of the collecting part, and a discharge gate valve is provided on the discharge pipe.

3. The dry carbide slag heat preservation storage device suitable for high-altitude cold areas according to claim 2, characterized in that: The gas outlet ends of the plurality of fluidizing branch pipes are evenly distributed on the bottom surface and side surfaces of the converging portion.

4. The dry carbide slag heat preservation storage device suitable for high-altitude cold areas according to claim 3, characterized in that: The axial flow fan is a variable frequency axial flow fan.

5. A method for heat preservation and storage of dry carbide slag suitable for high-altitude cold areas, characterized in that: The following steps are involved: Step 1: open the feeding gate valve, open the feeding air supply solenoid valve of the compressed air storage tank through the PLC controller, adjust the silo top dust collector on the top of the calcium carbide slag storage tank to the normally open state, use the high-pressure airflow in the compressed air storage tank to transport the calcium carbide slag powder, adopt pneumatic feeding, after the calcium carbide slag powder is filtered out of large particles by the filter screen, it is transported to the calcium carbide slag storage tank through the feeding pipeline, and when the level meter indicates that the calcium carbide slag level reaches 70%-80% of the overall volume, stop feeding; close the feeding gate valve, close the feeding air supply solenoid valve of the compressed air storage tank through the PLC controller, and adjust the silo top dust collector on the top of the calcium carbide slag storage tank to the normal working state; Step 2: The PLC controller starts the variable frequency axial flow fan to transport air through the fluidization pipe to the collection part of the carbide slag storage tank, so that the carbide slag powder reaches a fluidized state in the carbide slag storage tank. At the same time, the air in the carbide slag storage tank flows, causing the acetylene gas to be discharged through the silo top dust collector, thereby reducing the acetylene concentration in the tank. Step 3: Use a temperature detector to monitor the temperature in the carbide slag storage tank and send the temperature information to the PLC controller. When the temperature is lower than 0°C, the PLC controller controls the air preheater to turn on, heats the air to 15-20°C, and transports the air to the carbide slag storage tank through the fluidized pipe to fluidize the carbide slag powder. Step 4, when the second acetylene concentration detector detects that the acetylene concentration in the carbide slag storage tank reaches the explosion limit, the PLC controller controls the sound and light alarm to sound an alarm, and opens the exhaust solenoid valve to carry out emergency exhaust; When the first acetylene detector detects that there is acetylene gas in the fluidized pipe, the PLC controller controls the sound and light alarm to sound an alarm, and simultaneously the PLC controller controls the air preheater to close, and controls the variable frequency axial flow fan to increase the frequency; Step 5. When the carbide slag powder needs to be discharged, maintain the air supply of the fluidized pipe, open the discharge gate valve, open the discharge air supply solenoid valve of the compressed air storage tank through the PLC controller, use the high-pressure airflow in the compressed air storage tank to transport the carbide slag powder, and use pneumatic unloading to discharge the carbide slag powder in the carbide slag storage tank through the discharge end of the discharge pipe.

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