Comprehensive treatment system for operation environment of calcium carbide furnace

Abstract

The utility model belongs to the technical field of environment treatment, and relates to a calcium carbide furnace operation environment comprehensive treatment system which comprises an annular dust collection unit, a feeder dust collection unit, a first dust removal unit and a second dust removal unit. The second dust removal unit, the feeder dust collection unit and the annular dust collection unit are arranged from top to bottom, the annular dust collection unit is communicated with the second dust removal unit, the feeder dust collection unit is communicated with the first dust removal unit located around the feeder dust collection unit, and the second dust removal unit is further communicated with the first dust removal unit. Flue gas overflowing from the calcium carbide furnace is efficiently sucked out through the second dust remover, meanwhile, flue gas flowing back from the feeder is exhausted through the first dust remover, the flue gas is treated in a centralized mode, comprehensive treatment of the environment of the calcium carbide furnace is achieved, CO is prevented from exceeding the standard, and it is ensured that the environment where personnel are located meets the requirement.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental management and relates to a comprehensive management system for the working environment of a calcium carbide furnace. Background Art

[0002] The calcium carbide furnace in the calcium carbide plant cannot be absolutely sealed due to the characteristics of the industry, and the furnace pressure will inevitably fluctuate during the production process. The high furnace pressure in the calcium carbide furnace will cause the material to spray outward, resulting in material collapse in the calcium carbide furnace. At this time, a large amount of smoke and dust in the calcium carbide furnace will also be ejected from the connection between the calcium carbide furnace cover and the electrode, resulting in smoke around the calcium carbide furnace cover and the calcium carbide furnace. Since the calcium carbide furnace cover and the electrode are located on the second and third floors of the calcium carbide furnace, the overflowing smoke will overflow upward and through the ground on the fourth floor of the calcium carbide furnace, causing a lot of smoke and dust on the fourth floor of the calcium carbide furnace; the smoke contains CO, and direct emission will pollute the environment The environment is polluted by carbon monoxide. Once the carbon monoxide concentration exceeds the standard, it will cause poisoning, which seriously threatens the personal safety of the operators. There is also a ring feeder that feeds materials from the top of the calcium carbide furnace into the calcium carbide furnace, and the ring feeder is installed on the fifth floor of the calcium carbide furnace. The material level of the silo is low, and the calcium carbide furnace cover and the electrode are welded and sealed. Smoke overflows from the calcium carbide furnace and will flow back into the ring feeder on the fifth floor. The dust in the smoke will pollute the equipment and affect its operation. At the same time, the CO concentration in the smoke is high. Once there is a lot of backflow of smoke, it will pollute the on-site environment and may even cause serious consequences of poisoning for the operators, affecting their physical safety.

[0003] Patent document CN210374671U discloses a dust removal device for a calcium carbide furnace mouth, comprising a left duct, a right duct, a connecting duct, a left dust removal fan and a right dust removal fan. A right duct is arranged on the right side of the left duct. Both the left duct and the right duct are provided with a ventilation cavity which passes through front and back. A connecting duct which can connect the right side of the left duct and the left side of the right duct is fixedly installed between the right side of the left duct and the left side of the right duct. The front end of the left duct is connected with the air suction port of the left dust removal fan, and the front end of the right duct is connected with the air suction port of the right dust removal fan; the left dust removal fan and the right dust removal fan can perform dust removal operations for one calcium carbide furnace at the same time without affecting the operation of another calcium carbide furnace. Although the existing dust removal system can achieve dust removal for the calcium carbide furnace, a small amount of flue gas overflows from the furnace cover and electrode gaps on the second floor of the calcium carbide furnace system through the third floor of the calcium carbide furnace and from the fourth floor platform of the calcium carbide furnace. Since the fourth floor platform of the existing calcium carbide furnace is made of steel plates, the ground layer will warp after long-term use of the steel plates, and then gaps will occur, resulting in a loose seal on the lower layer. At the same time, welding is used when the steel plate floor is laid, and the welds are prone to cracking, resulting in poor sealing of the ground layer. The flue gas ejected from the calcium carbide furnace diffuses and continuously overflows upward from the gaps on the ground of the calcium carbide furnace, or from the welding points, which is not conducive to the collection and dust removal of the flue gas, resulting in a large smoke dissipation area, poor dust removal effect, and the smoke cannot be evacuated by convection, resulting in excessive carbon monoxide concentration in the calcium carbide furnace, posing a threat to the personal safety of on-site personnel. Utility Model Content

[0004] In order to solve the technical problems that the smoke overflow from the existing calcium carbide furnace cannot be evacuated by convection and the smoke from the feeder flows back, the utility model provides a comprehensive management system for the working environment of the calcium carbide furnace. The smoke overflowing from the calcium carbide furnace is efficiently sucked out by the second dust removal unit, and the smoke backflowing from the feeder is discharged by the first dust removal unit. The smoke is centrally treated to achieve comprehensive management of the calcium carbide furnace environment, avoid CO exceeding the standard, and ensure that the environment in which personnel are located meets the requirements.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A comprehensive management system for the working environment of a calcium carbide furnace includes an annular dust suction unit, a feeder dust suction unit, a first dust removal unit and a second dust removal unit; the second dust removal unit, the feeder dust suction unit and the annular dust suction unit are arranged from top to bottom, the annular dust suction unit is connected to the second dust removal unit, the feeder dust suction unit is connected to the first dust removal unit located around the feeder dust suction unit, and the second dust removal unit is also connected to the first dust removal unit.

[0007] The annular dust suction unit includes a first annular dust suction mechanism and a first dust suction mechanism; the first annular dust suction mechanism includes a first dust suction transfer pipe and a first annular dust suction pipe connected in sequence from top to bottom; the first dust suction mechanism is located below the first annular dust suction pipe and is connected to the first annular dust suction pipe, and the first dust suction transfer pipe is connected to the second dust removal unit; a first dust suction pneumatic valve is arranged on the first dust suction transfer pipe; the first dust suction mechanism includes a first dust suction inlet pipe and a first dust suction hood connected from top to bottom; the first dust suction inlet pipe is connected to the first annular dust suction pipe; a first control valve is arranged on the first dust suction inlet pipe.

[0008] The second dust removal unit includes a second dust collector and a second dust removal fan connected to the second dust collector; the first dust suction adapter is connected to the second dust collector; and the second dust collector is connected to the first dust removal unit.

[0009] The feeder dust suction unit includes a feeder body and a ventilation duct; the ventilation duct is placed in the feeder body, the first dust removal unit includes a first dust collector and a first dust removal fan both placed outside the feeder body, the ventilation duct is connected to the first dust collector; the first dust removal fan is connected to the first dust collector.

[0010] A CO concentration sensor is arranged in the feeder body, and a first pneumatic valve is arranged on the ventilation pipe. The first pneumatic valve is controlled by a concentration signal detected by the CO concentration sensor.

[0011] The comprehensive management system for the working environment of the calcium carbide furnace also includes a four-layer platform placed below the first annular dust suction pipe, the first dust suction inlet pipe runs through the four-layer platform, the first dust suction hood is located below the four-layer platform, and the first control valve is located above the four-layer platform.

[0012] It is further defined that the four-layer platform includes a steel plate layer, a steel bar layer and a concrete layer laid in sequence from bottom to top; the steel bar layer is a grid layer composed of criss-crossing steel bars; overlapping layers are arranged on the outer wall of the steel plate layer, the outer wall of the steel bar layer and the outer wall of the concrete layer; the first dust inlet pipe passes through the steel plate layer, the steel bar layer and the concrete layer, the first dust hood is located below the steel plate layer, and the first control valve is located above the concrete layer.

[0013] It is further defined that the comprehensive management system for the working environment of the calcium carbide furnace also includes a dust suction main pipe arranged between the annular dust suction unit and the second dust removal unit; the axis of the dust suction main pipe is located in the vertical direction; the dust suction main pipe is also connected to an air inlet pipe; and an air pneumatic valve is arranged on the air inlet pipe.

[0014] It is further defined that the annular dust suction unit and the feeder dust suction unit are both one or more, and the plurality of annular dust suction units are connected to the second dust removal unit through the dust suction main pipe, and the plurality of feeder dust suction units are connected to the first dust removal unit.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model efficiently absorbs the flue gas overflowing from the calcium carbide furnace through the second dust removal unit, and at the same time discharges the flue gas backflowing from the feeder through the first dust removal unit, centrally treats the flue gas, realizes the comprehensive management of the calcium carbide furnace environment, avoids CO exceeding the standard, and ensures that the environment in which personnel are located meets the requirements.

[0017] 2. The utility model winds the annular dust suction unit around the outer circumference of the calcium carbide furnace, and evacuates the flue gas overflowing from the furnace cover and electrodes around the multiple silos of the calcium carbide furnace to the second dust collector above, thereby achieving dust removal of the flue gas in the three layers of the calcium carbide furnace, reducing the excessive carbon monoxide concentration on site, and ensuring site safety.

[0018] 3. In the utility model, through the dust suction main pipe between the annular dust suction unit and the second dust collector, and the axis of the dust suction main pipe is located in the vertical direction, the overflowing smoke is lifted and discharged from the third floor to the sixth floor of the calcium carbide furnace through the dust suction main pipe, so as to achieve the purpose of ventilation and dust removal; further, by setting an air inlet pipe connected with the dust suction main pipe; an air pneumatic valve is arranged on the air inlet pipe, when it is detected that the temperature of the smoke sucked into the annular dust suction unit is high, air is filled into the air inlet pipe to cool the smoke, so as to avoid the influence of excessive smoke temperature on the dust collector equipment, ensure the safe and stable operation of the dust removal, and improve the dust removal effect.

[0019] 4. In the utility model, the first dust suction mechanism includes a first dust suction inlet pipe and a first dust suction hood which are connected from top to bottom; the first dust suction inlet pipe is connected to the first annular dust suction pipe, a first control valve is arranged on the first dust suction inlet pipe, and the dust suction hood is located in the upper area of ​​the third furnace of the calcium carbide furnace, the first dust suction inlet pipe passes through the four-layer platform and is connected to the first annular dust suction pipe to evacuate the smoke overflowing from the furnace cover and the electrode of the calcium carbide furnace.

[0020] 5. In the utility model, the first dust suction pneumatic valve and the second dust removal fan are interlocked, which can not only adjust the frequency of the second dust removal fan according to the furnace pressure of the corresponding calcium carbide furnace, but also when one of the calcium carbide furnaces collapses, the opening of the dust suction pneumatic valve of the annular dust suction unit on the other calcium carbide furnace can be reduced to ensure the dust collection and ventilation effect on the top of the collapsed calcium carbide furnace. In this way, it can ensure that the two sets of calcium carbide furnaces are ventilated under normal circumstances, and when one of the calcium carbide furnaces collapses, a large amount of smoke can be discharged in the shortest time, thereby improving the dust removal effect.

[0021] 6. The utility model has a four-layer platform structure in which a steel bar layer and a concrete layer are laid in sequence on a steel plate. The entire platform has good sealing performance and higher stability, and will not warp, thus preventing smoke from overflowing upward from the four-layer platform. The overflowed smoke is concentrated on the top of the third floor, which is conducive to centralized smoke treatment.

[0022] 7. The utility model sets an overlapping layer to ensure smooth connection between the four-layer platform and the original concrete columns around the calcium carbide furnace, which not only greatly improves the sealing performance of the four-layer platform, but also enhances the safety and stability of the four-layer platform and the calcium carbide furnace.

[0023] 8. The utility model arranges a ventilation duct in the feeder body, and arranges a first dust collector and a first dust removal fan outside the feeder body. The ventilation duct is connected to the first dust collector, and the first dust collector is connected to the second dust removal fan, so that the smoke that flows back into the feeder body is sucked out to the dust collector in time, avoiding excessive CO concentration and ensuring the normal operation of the ring feeder and a clean environment.

[0024] 9. The utility model sets a first pneumatic valve on the connecting pipe and sets a CO concentration sensor in the feeder body; the pneumatic valve is controlled by the concentration signal detected by the CO concentration sensor. When the CO concentration is above 24ppm, the pneumatic valve opens to extract the smoke with higher concentration, ensuring that the environment for personnel meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the comprehensive management system for the calcium carbide furnace operating environment;

[0026] Figure 2 It is a schematic diagram of a circular dust collection unit;

[0027] Figure 3 A bottom view of the first annular dust suction pipe;

[0028] Figure 4 This is a front view of the first annular dust suction pipe;

[0029] Figure 5 This is a schematic diagram of a four-story platform;

[0030] Figure 6 This is a top view of the four-story platform;

[0031] Figure 7 for Figure 6 Schematic diagram of the cross section of the middle dust suction hole;

[0032] Figure 8 is a schematic diagram of the main view of the second dust collector;

[0033] Fig. 9 is a side view schematic diagram of the second dust collector;

[0034] Fig.10 It is a schematic diagram of the dust collection unit of the feeder;

[0035] Fig.11 It is a schematic diagram of the connection of two annular dust collection units;

[0036] in:

[0037] 1—annular dust suction unit; 110—first annular dust suction mechanism; 1101—first annular dust suction pipe; 1102—first dust suction transfer pipe; 1103—first dust suction pneumatic valve; 1104—dust suction inlet; 1105—dust suction outlet; 111—first dust suction mechanism; 1111—first dust suction cover; 1112—first dust suction inlet pipe; 1113—first control valve; 120—dust suction main pipe; 130—air inlet pipe; 140—air pneumatic valve;

[0038] 2—four-layer platform; 201—steel plate layer; 202—rebar layer; 203—concrete layer; 204—dust suction hole; 205—insulation layer; 206—installation hole; 207—overlap layer;

[0039] 3—dust collecting unit of feeder; 301—feeder body; 302—ventilation pipe; 303—connecting pipe; 304—CO concentration sensor;

[0040] 4—first dust removal unit; 401—first dust collector; 402—first dust removal fan; 402—first dust removal air inlet pipe;

[0041] 5—second dust removal unit; 501—second dust collector; 502—second dust removal fan; 503—second dust removal air inlet pipe; 504—dust removal mechanism; 505—ash cleaning mechanism; 506—ash cleaning pipe; 507—ash cleaning pneumatic valve; 508—blowing mechanism; 509—blowing valve; 6—dust collector connecting pipe. DETAILED DESCRIPTION

[0042] The present invention is now described in detail with reference to the accompanying drawings and embodiments.

[0043] Example 1

[0044] See also Figure 1 A comprehensive management system for the working environment of a calcium carbide furnace includes an annular dust suction unit 1, a feeder dust suction unit 3, a first dust removal unit 4 and a second dust removal unit 5; the second dust removal unit 5, the feeder dust suction unit 3 and the annular dust suction unit 1 are arranged from top to bottom, the annular dust suction unit 1 is connected with the second dust removal unit 5, the feeder dust suction unit 3 is connected with the first dust removal unit 4 located around the feeder dust suction unit 3, and the second dust removal unit 5 is also connected with the first dust removal unit 4.

[0045] Specifically, the first dust removal unit 4 is around the calcium carbide furnace, the second dust removal unit 5 is located on the sixth floor of the calcium carbide furnace, the feeder dust suction unit 3 is located on the fifth floor of the calcium carbide furnace, and the annular dust suction unit 1 is located around the silo between the fifth and fourth floors of the calcium carbide furnace, thereby evacuating the flue gas overflowing from the calcium carbide furnace cover and electrodes (the second and third floors of the calcium carbide furnace) to the second dust removal unit 5 above the calcium carbide furnace, thereby achieving dust removal of the flue gas on the third floor of the calcium carbide furnace, reducing the excessive carbon monoxide concentration on site, and ensuring site safety; at the same time, the flue gas in the feeder dust suction unit 3 is evacuated to the first dust removal unit 4 to ensure that the CO concentration inside the feeder dust suction unit 3 is within the qualified range and the on-site environment is safe.

[0046] See also Figure 1 In this embodiment, the comprehensive management system for the working environment of the calcium carbide furnace also includes a dust suction main pipe 120 arranged between the annular dust suction unit 1 and the second dust removal unit 5; the axis of the dust suction main pipe 120 is located in the vertical direction; the dust suction main pipe 120 is also connected to an air inlet pipe 130; and an air pneumatic valve 140 is arranged on the air inlet pipe 130.

[0047] Since the main flue gas overflowing from the calcium carbide furnace is concentrated on the third floor of the calcium carbide furnace, the second dust removal unit 5 is located on the sixth floor of the calcium carbide furnace. Based on the height difference between the floors, the flue gas at the lower position is discharged upward to the second dust removal unit 5 at the higher position through the vertical dust suction main pipe 120; in addition, because the flue gas temperature in the calcium carbide furnace is relatively high, when the high-temperature flue gas enters the second dust removal unit 5, it will damage the filter bag (or filter cartridge) of the second dust removal unit 5, resulting in low dust removal efficiency, and in severe cases, damage to the equipment; therefore, a temperature detector is set on the annular dust suction unit 1. When the flue gas temperature is detected to be high (greater than 200°C), the air pneumatic valve 140 is opened to allow outside air to enter the dust suction main pipe 120. The air is used as a cold medium to cool the flue gas, thereby ensuring the safe and stable operation of the second dust removal unit 5 and improving the dust removal efficiency.

[0048] See also Figure 2 , Figure 3 and Figure 4 The annular dust suction unit 1 includes a first annular dust suction mechanism 110 and a first dust suction mechanism 111; the first annular dust suction mechanism 110 includes a first dust suction transfer tube 1102 and a first annular dust suction pipe 1101 which are connected in sequence from top to bottom; the first dust suction mechanism 111 is located below the first annular dust suction pipe 1101 and is connected to the first annular dust suction pipe 1101, and the first dust suction transfer tube 1102 is connected to the second dust removal unit 5; a first dust suction pneumatic valve 1103 is arranged on the first dust suction transfer tube 1102.

[0049] Specifically, the first annular dust suction pipe 1101 is an annular pipe, a dust suction inlet 1104 is arranged on its bottom surface, a dust suction outlet 1105 is arranged at the upper position of its side wall, the dust suction inlet 1104 is connected with the dust suction outlet 1105, the dust suction inlet 1104 is connected with the first dust suction mechanism 111, and the dust suction outlet 1105 is connected with the first dust suction transfer tube 1102.

[0050] See also Figure 2 The first dust suction mechanism 111 includes a first dust suction inlet pipe 1112 and a first dust suction cover 1111 which are connected from top to bottom; the first dust suction inlet pipe 1112 is connected to the first annular dust suction pipe 1101; and a first control valve 1113 is arranged on the first dust suction inlet pipe 1112.

[0051] Preferably, the first dust hood 1111 is a conical hood that expands downward to increase the dust collection area; the first dust hood 1111 is made on-site using a 6mm thick steel plate. The first control valve 1113 is a manual butterfly valve; the first dust pneumatic valve 1103 is a pneumatic butterfly valve; the axial direction of the first dust inlet pipe 1112 is parallel to the axial direction of the dust main pipe 120.

[0052] In this embodiment, there are multiple first dust suction mechanisms 111 , and the multiple first dust suction mechanisms 111 are evenly distributed around the circumference of the first annular dust suction pipe 1101 .

[0053] Preferably, the number of the first dust suction mechanisms 111 is 8, and the number of the dust suction inlets 1104 is 8, which are evenly distributed on the bottom surface of the first annular dust suction tube 1101. The axes of the 8 first dust suction mechanisms 111 are parallel, and the bottom end of each first dust suction inlet tube 1112 is connected to a first dust suction hood 1111, and the top end of each first dust suction inlet tube 1112 is connected to the corresponding dust suction inlet 1104 on the bottom surface of the first annular dust suction tube 1101.

[0054] Example 2

[0055] Based on Example 1, see Figure 1 The comprehensive management system for the working environment of the calcium carbide furnace also includes a four-layer platform 2 placed under the first annular dust suction pipe 1101, the first dust suction inlet pipe 1112 runs through the four-layer platform 2, and the first dust suction hood 1111 is located below the four-layer platform 2, and the first control valve 1113 is located above the four-layer platform 2.

[0056] See also Figure 5 The four-layer platform 2 includes a steel plate layer 201, a steel bar layer 202 and a concrete layer 203 laid in sequence from bottom to top; the steel bar layer 202 is a grid layer composed of crisscrossed steel bars; an overlapping layer 207 is arranged on the outer wall of the steel plate layer 201, the outer wall of the steel bar layer 202 and the outer wall of the concrete layer 203; the first dust suction inlet pipe 1112 penetrates the steel plate layer 201, the steel bar layer 202 and the concrete layer 203, the first dust suction hood 1111 is located below the steel plate layer 201, and the first control valve 1113 is located above the concrete layer 203.

[0057] Preferably, the diameter of the steel bar is 8 mm to 10 mm, and the mesh size of the steel bar layer 202 is less than 150 mm. More preferably, the diameter of the steel bar is 8 mm.

[0058] Preferably, the thickness of the steel plate layer 201 is 3 mm, the thickness of the steel bar layer 202 is 7 mm to 8 mm; and the thickness of the concrete layer 203 is 100 to 120 mm.

[0059] During implementation, a grid-shaped steel bar layer 202 is set on the steel plate layer 201, and the grid of the entire steel bar layer 202 is poured. Finally, a concrete layer 203 is set, smoothed and solidified to ensure the strength and sealing of the ground. In this way, the smoke overflowing from the furnace cover of the calcium carbide furnace below the fourth floor will not easily dissipate upward from the fourth floor ground, but will be concentrated on the top of the third floor of the calcium carbide furnace and centrally processed by a dust suction device.

[0060] See also Figure 6 and Figure 7 The four-layer platform 2 provided in this embodiment also includes a dust suction hole 204, and the dust suction hole 204 passes through the steel plate layer 201, the steel bar layer 202 and the concrete layer 203 from bottom to top.

[0061] Since the material of the first dust suction inlet pipe 1112 is Q235b, an insulating layer 205 is set on the inner wall of the dust suction hole 204. While enhancing the sealing, it prevents the first dust suction inlet pipe 1112 from being connected to the four-layer platform 2 to generate electric sparks, thereby improving safety.

[0062] In this embodiment, the insulating layer 205 is a cotton rock layer, a fiber felt layer or a mica board layer. The thickness of the insulating layer 205 is 10 mm to 30 mm. Preferably, the fiber felt layer is a glass fiber felt layer.

[0063] Preferably, the insulating layer 205 is a cotton rock layer with a thickness of 10 mm, the insulating layer 205 is a mica board layer with a thickness of 10 mm, the insulating layer 205 is a fiber felt layer with a thickness of 30 mm, and the insulating layer 205 is a cotton rock layer with a thickness of 20 mm.

[0064] In this embodiment, there are one or more dust suction holes 204, and the multiple dust suction holes 204 are all distributed on the same circumference. Specifically, the function of the dust suction hole 204 is to facilitate the first dust suction inlet pipe 1112 to pass through the four-layer platform 2, so as to suck away the smoke concentrated on the top of the third floor of the calcium carbide furnace for centralized treatment. Therefore, the number of dust suction holes 204 is designed according to the specific conditions of the actual dust suction pipeline.

[0065] Preferably, there are 8 first dust suction inlet pipes 1112 and correspondingly, there are 8 dust suction holes 204. Since the smoke on the third floor of the calcium carbide furnace is concentrated on the furnace cover and electrodes of the calcium carbide furnace, during implementation, the 8 dust suction holes 204 are on the four-layer platform 2 and are evenly distributed along the circumference of the calcium carbide furnace body, thereby improving the dust removal effect of the smoke.

[0066] The four-layer platform 2 provided in this embodiment also includes mounting holes 206, which pass through the steel plate layer 201, the steel bar layer 202 and the concrete layer 203 from bottom to top. Specifically, the mounting holes 206 are used to avoid the equipment installed on the fourth floor of the calcium carbide furnace. The shape and number of the mounting holes 206 are designed according to the specific conditions of the equipment on the fourth floor of the calcium carbide furnace, and no limitation is made here.

[0067] Preferably, see Figure 6 The mounting hole 206 is circular and is mounted on the outside of the related equipment of the calcium carbide furnace system. The inner diameter of the mounting hole 206 is larger than the outer diameter of the related equipment, that is, a gap is left between the outer wall of the mounting hole 206 and the related equipment, so that the ground structure is disconnected from the electrodes on the calcium carbide furnace and the calcium carbide furnace material pipe, so as to avoid electrical sparks between the calcium carbide furnace and the ground, thereby ensuring the safety of on-site operations.

[0068] Furthermore, an overlap layer 207 is provided on the outer wall of the steel plate layer 201, the outer wall of the steel bar layer 202 and the outer wall of the concrete layer 203 (only one side of the overlap layer is shown in the figure, and other connections are not shown). By providing the overlap layer 207, the four-layer platform is overlapped with the original concrete columns around the calcium carbide furnace. When the four-layer platform is laid, steel bars are first implanted at the connection between the outer wall of the four-layer platform and the original concrete layer, and then concrete is poured to form the overlap layer 207, so as to ensure that the four-layer platform is smoothly connected with the original concrete columns, which not only greatly improves the sealing performance of the four-layer platform, but also enhances the safety and stability of the four-layer platform and the calcium carbide furnace.

[0069] Example 3

[0070] See also Figure 1 The second dust removal unit 5 provided in this embodiment includes a second dust collector 501 and a second dust removal fan 502 connected to the second dust collector 501; the first dust suction transfer tube 1102 is connected to the second dust collector 501; the second dust collector 501 is connected to the first dust removal unit 4.

[0071] See also Fig. 9 and Fig.10 In this embodiment, a dust removal bin is provided in the second dust collector 501, and the dust removal bin includes a dust removal mechanism 504 and a cleaning mechanism 505 arranged from top to bottom; the dust removal mechanism 504 is connected to the cleaning mechanism 505 through a cleaning pipe 506, and a cleaning pneumatic valve 507 is provided on the cleaning pipe 506; the annular dust suction unit 1 is connected to the dust removal mechanism 504.

[0072] Specifically, the dust removal mechanism 504 is mainly used to remove dust from the inhaled flue gas. The dust removal mechanism 504 has the same structure as the existing dust removal device. Preferably, the second dust collector 501 adopts a downward air inlet filtration method, which can suck the smoke in the flue gas into the dust removal mechanism 504, and the gas after dust removal is discharged from the dust removal mechanism 504 for subsequent treatment or directly discharged into the atmosphere; the dust sucked into the dust removal mechanism 504 enters the cleaning mechanism 505 from the bottom of the dust removal mechanism 504 through the cleaning pipe 506, and the dust is discharged from the cleaning mechanism 505 through the dust collector connecting pipe 6 into the first dust removal unit 4.

[0073] During implementation, the dust removal bin also includes a blowing mechanism 508 arranged above the dust removal mechanism 504, which blows air into the dust removal mechanism 504. A blowing valve 509 is also arranged on the blowing mechanism 508. The blowing valve 509 is a submerged 3-inch right-angle pulse valve with a large size to improve the blowing effect.

[0074] In this embodiment, there are one or more dust removal bins, and the multiple dust removal bins are arranged in parallel in the second dust collector 501. Preferably, there are 7 dust removal bins, and a dust cleaning pneumatic valve 507 is respectively arranged between the dust removal mechanism 504 and the dust cleaning mechanism 505 of each dust removal bin. When the dust removal bin needs to be unloaded, the dust removal bin that needs to be unloaded is adjusted to a full offline state through the dust cleaning pneumatic valve 507 arranged on the dust removal bin, that is, the dust removal mechanism 504 and the dust cleaning mechanism 505 of the dust removal bin that needs to be unloaded are not connected, so that the removed powder accumulated in the dust cleaning mechanism 505 can be effectively avoided from being sucked back into the dust removal mechanism 504 and attached to the filter cartridge surface of the dust removal mechanism 504 for a second time, thereby improving the dust cleaning efficiency.

[0075] During implementation, the second dust collector 501 is externally connected to the second dust removal air inlet pipe 503 , and the annular dust suction unit 1 is connected to the dust removal mechanism 504 via the second dust removal air inlet pipe 503 .

[0076] The second dust removal fan 502 is used to provide power to the second dust collector 501. The second dust removal fan 502 allows the smoke to be sucked into the dust removal mechanism 504 through the annular dust suction unit 1 and the second dust removal air inlet pipe 503 for dust removal.

[0077] Preferably, the withstand pressure of the second dust collector 501 is ±7Kpa, and the air leakage of the second dust collector 501 is ≤4%; the second dust removal fan 502 is a variable frequency fan, which achieves energy saving while ensuring the dust removal effect, and the operating frequency is 45Hz~50Hz; the second dust removal air inlet pipe 503 adopts a spiral welded pipe or a square air duct, and the material is Q235b.

[0078] During implementation, an inspection door is provided on the top of the second dust collector 501 for maintaining the filter cartridge and air duct, etc. The filter cartridge can be replaced only outside the second dust collector 501 without entering the second dust collector 501; a rainproof canopy is provided on the top of the second dust collector 501 to facilitate inspection and protection of the second dust collector 501.

[0079] Example 4

[0080] See also Figure 8 The feeder dust suction unit 3 includes a feeder body 301 and a ventilation pipe 302; the ventilation pipe 302 is placed in the feeder body 301, and the first dust removal unit 4 includes a first dust collector 401 and a first dust removal fan 402, both of which are placed outside the feeder body 301, and the ventilation pipe 302 is connected to the first dust collector 401; the first dust removal fan 403 is connected to the first dust collector 401.

[0081] A CO concentration sensor 304 is provided in the feeder body 301, and a first pneumatic valve is provided on the ventilation pipe 302, and the first pneumatic valve is controlled by the concentration signal detected by the CO concentration sensor 304. The interlocking among the CO concentration sensor 207, the first pneumatic valve and the first dust removal fan 402 is realized by the controller. When the CO concentration is above 24ppm, the controller controls the pneumatic valve to open, extracts the flue gas with a higher concentration, and ensures that the environment where the personnel are located meets the requirements; in addition, when the CO concentration increases, the frequency of the first dust removal fan 402 can be adjusted by the controller to increase, so as to increase the dust removal amount and achieve a good dust removal effect; the automatic control of the pneumatic valve can also be realized through the interlocking control, which is easy to operate and effectively avoids the CO concentration exceeding the standard for a long time on site.

[0082] The feeder body 301 is also connected to the interior of the calcium carbide furnace through a feed pipe. When connected, the feed pipe passes through the fifth and fourth layers of the calcium carbide furnace, and then extends into the calcium carbide furnace from the furnace cover of the calcium carbide furnace. In order to improve the sealing performance, an annular sealing layer is arranged between the feed pipe and the furnace cover of the calcium carbide furnace. The sealing layer is sleeved on the outside of the feed pipe and is in contact with the furnace cover of the calcium carbide furnace. The sealing layer includes a refractory brick layer, a coarse packing layer and a refractory castable layer from bottom to top, which improves the tightness between the feeder body 301 and the furnace cover of the calcium carbide furnace and reduces the overflow of smoke from the furnace cover of the calcium carbide furnace.

[0083] See also Figure 8 In this embodiment, the first dust removal unit 4 includes a first dust collector 401, a first dust removal fan 402 and a first dust removal air inlet pipe 403. The first dust removal air inlet pipe 403 is placed outside the first dust collector 401. One end of the first dust removal air inlet pipe 403 is connected to the first dust collector 401, and the other end of the first dust removal air inlet pipe 403 is connected to the ventilation pipe 302 through the connecting pipe 303. The first dust removal fan 402 is connected to the first dust collector 401 to provide power to the first dust collector 401. The dust cleaning mechanism 505 is also connected to the first dust collector 401 through the first dust removal air inlet pipe 403, so that the smoke generated when the second dust collector 501 is cleaned can enter the first dust collector 401 for dust removal again, thereby improving the dust removal efficiency. The internal structure of the first dust collector 401 can refer to the internal structure of the second dust collector 501.

[0084] Example 5

[0085] In this embodiment, there are one or more annular dust suction units 1 and feeder dust suction units 3, and multiple annular dust suction units 1 are connected to the second dust removal unit 5 through the dust suction main pipe 130, and multiple feeder dust suction units 3 are connected to the first dust removal unit 4.

[0086] There are multiple annular dust collection units 1; the multiple annular dust collection units 1 are symmetrically distributed around the axial direction of the dust collection main pipe 120. Specifically, the number of annular dust collection units 1 and the number of feeder dust collection units 3 correspond to the number of calcium carbide furnaces, and each calcium carbide furnace is provided with an annular dust collection unit 1 and a feeder dust collection unit 3 to perform dust removal on the flue gas overflowing from the calcium carbide furnace and the flue gas backflowing from the annular feeder.

[0087] See also Fig.11 , taking two calcium carbide furnaces as an example, record them as calcium carbide furnace No. 1 and calcium carbide furnace No. 2. There are two annular dust collection units 1, and they are symmetrically distributed along the axial direction of the dust collection main pipe 120; the two annular dust collection units 1 are both connected to the dust collection main pipe 120.

[0088] Taking the installation of the first annular dust suction mechanism 110 as an example, 8 dust suction holes 204 are set on the fourth floor platform of the No. 1 calcium carbide furnace, the first annular dust suction pipe 1101 is located between the fourth floor and the fifth floor, and is ringed on the outside of the 12 silos, 8 first dust suction hoods 1111 are located on the top of the third floor of the calcium carbide furnace, and 8 first dust suction inlet pipes 1112 pass through the corresponding dust suction holes 204 and are located above the fourth floor platform of the calcium carbide furnace, and are correspondingly connected to the 8 dust suction inlets 1104 on the first annular dust suction pipe 1101; the first dust suction transfer pipe 1102 is located on the right side of the first annular dust suction pipe 1101 On the upper side, the first dust suction transfer pipe 1102 is placed horizontally, and the left end of the first dust suction transfer pipe 1102 is connected to the dust suction outlet 1105 on the first annular dust suction pipe 1101, and the dust suction main pipe 120 is placed vertically. The bottom end of the dust suction main pipe 120 is located on the upper part of the fourth floor platform of the calcium carbide furnace and is connected to the right end of the first dust suction transfer pipe 1102. The dust suction main pipe 120 passes upward through the fifth and sixth floors of the calcium carbide furnace. The top end of the dust suction main pipe 120 is located above the sixth floor of the calcium carbide furnace and is connected to the dust removal mechanism 504 in the second dust collector 501 through the second dust removal air inlet pipe 503. The installation of the No. 2 calcium carbide furnace is the same as that of the No. 1 calcium carbide furnace.

[0089] During implementation, the second dust collector 501 collects dust and smoke for two calcium carbide furnaces at the same time. When in normal production, the controller opens the two first dust suction pneumatic valves 1103 at the same time to collect dust and ventilate the top space of the calcium carbide furnace, greatly reducing the concentration of carbon monoxide on the top of the calcium carbide furnace, ensuring on-site operation safety and environmental cleanliness; when the No. 1 calcium carbide furnace collapses (the material pressure in the calcium carbide furnace is within the range of 100Pa-500Pa, and the material is sprayed outward), the first dust suction pneumatic valve 1103 corresponding to the No. 2 calcium carbide furnace is adjusted down, and the controller controls the frequency of the second dust removal fan 502 to automatically increase, ensuring the dust collection and ventilation effect on the top of the No. 1 calcium carbide furnace, so that the ventilation of the two calcium carbide furnaces can be ensured normally, and a large amount of smoke can be discharged in the shortest time when one calcium carbide furnace collapses. And the pneumatic regulating valve of the other furnace is turned down.

[0090] In the utility model, the comprehensive management system of the calcium carbide furnace operating environment also includes a temperature sensor and a controller; the temperature sensor is placed on the first dust suction transfer tube 1102. The controller is respectively connected to the first dust suction pneumatic valve 1103, the temperature sensor, the air pneumatic valve 140, the dust cleaning pneumatic valve 507, the first dust removal fan 402, the second dust removal fan 502, the CO concentration sensor 304 and the first pneumatic valve on the ventilation pipe 302. Through the controller, all valves and sensors are interlocked to achieve unattended automatic operation; the PLC controller model is a programmable controller produced by Siemens; it also has independent indoor and on-site manual operation functions, which is convenient for the normal operation of the dust removal device during maintenance and overhaul.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the above embodiments, any modification of the technical solution recorded in the above embodiments or equivalent replacement of some of the technical features therein by ordinary technicians in this field should fall within the protection scope of the utility model.

Claims

1. A comprehensive management system for calcium carbide furnace operating environment, characterized in that: The invention comprises an annular dust suction unit (1), a feeder dust suction unit (3), a first dust removal unit (4) and a second dust removal unit (5); the second dust removal unit (5), the feeder dust suction unit (3) and the annular dust suction unit (1) are arranged from top to bottom, the annular dust suction unit (1) is connected to the second dust removal unit (5), the feeder dust suction unit (3) is connected to the first dust removal unit (4) located around the feeder dust suction unit (3), and the second dust removal unit (5) is also connected to the first dust removal unit (4).

2. The comprehensive management system for calcium carbide furnace operating environment according to claim 1 is characterized in that: The annular dust suction unit (1) comprises a first annular dust suction mechanism (110) and a first dust suction mechanism (111); the first annular dust suction mechanism (110) comprises a first dust suction transfer tube (1102) and a first annular dust suction pipe (1101) which are connected in sequence from top to bottom; the first dust suction mechanism (111) is located below the first annular dust suction pipe (1101) and is connected to the first annular dust suction pipe (1101), and the first dust suction transfer tube (1102) is connected to the second dust removal unit (5); and a first dust suction pneumatic valve (1103) is provided on the first dust suction transfer tube (1102).

3. The comprehensive management system for calcium carbide furnace operating environment according to claim 2 is characterized in that: The first dust suction mechanism (111) comprises a first dust suction inlet pipe (1112) and a first dust suction cover (1111) which are connected from top to bottom; the first dust suction inlet pipe (1112) is connected to a first annular dust suction pipe (1101); and a first control valve (1113) is provided on the first dust suction inlet pipe (1112).

4. The comprehensive management system for calcium carbide furnace operating environment according to claim 3 is characterized in that: The second dust removal unit (5) comprises a second dust collector (501) and a second dust removal fan (502) connected to the second dust collector (501); the first dust suction adapter tube (1102) is connected to the second dust collector (501); and the second dust collector (501) is connected to the first dust removal unit (4).

5. The comprehensive management system for calcium carbide furnace operating environment according to claim 4 is characterized in that: The feeder dust suction unit (3) comprises a feeder body (301) and a ventilation pipe (302); the ventilation pipe (302) is placed inside the feeder body (301); the first dust removal unit (4) comprises a first dust collector (401) and a first dust removal fan (402) both of which are placed outside the feeder body (301); the ventilation pipe (302) is connected to the first dust collector (401); and the first dust removal fan (402) is connected to the first dust collector (401).

6. The comprehensive management system for calcium carbide furnace operating environment according to claim 5 is characterized in that: A CO concentration sensor (304) is arranged in the feeder body (301), and a first pneumatic valve is arranged on the ventilation pipe (302). The first pneumatic valve is controlled by a concentration signal detected by the CO concentration sensor (304).

7. The comprehensive management system for calcium carbide furnace operating environment according to claim 6 is characterized in that: The comprehensive management system for the working environment of the calcium carbide furnace also includes a four-layer platform (2) placed below the first annular dust suction pipe (1101), the first dust suction inlet pipe (1112) passes through the four-layer platform (2), and the first dust suction hood (1111) is located below the four-layer platform (2), and the first control valve (1113) is located above the four-layer platform (2).

8. The comprehensive management system for calcium carbide furnace operating environment according to claim 7 is characterized in that: The four-layer platform (2) comprises a steel plate layer (201), a steel bar layer (202) and a concrete layer (203) which are laid in sequence from bottom to top; the steel bar layer (202) is a grid layer composed of crisscrossed steel bars; an overlap layer (207) is provided on the outer wall of the steel plate layer (201), the outer wall of the steel bar layer (202) and the outer wall of the concrete layer (203); the first dust suction inlet pipe (1112) passes through the steel plate layer (201), the steel bar layer (202) and the concrete layer (203); the first dust suction hood (1111) is located below the steel plate layer (201), and the first control valve (1113) is located above the concrete layer (203).

9. The comprehensive management system for calcium carbide furnace operating environment according to any one of claims 1 to 8, characterized in that: The comprehensive management system for the working environment of the calcium carbide furnace also includes a dust suction main pipe (120) arranged between the annular dust suction unit (1) and the second dust removal unit (5); the axis of the dust suction main pipe (120) is located in the vertical direction; the dust suction main pipe (120) is also connected to an air inlet pipe (130); and an air pneumatic valve (140) is arranged on the air inlet pipe (130).

10. The comprehensive management system for calcium carbide furnace operating environment according to claim 9 is characterized in that: The annular dust suction unit (1) and the feeder dust suction unit (3) are each one or more, and the plurality of annular dust suction units (1) are connected to the second dust removal unit (5) via a dust suction main pipe (120), and the plurality of feeder dust suction units (3) are connected to the first dust removal unit (4).

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