Dust removal device for calcium carbide furnace

Abstract

The utility model belongs to the technical field of environmental governance, and relates to a calcium carbide furnace dust removal device which comprises an annular dust collection unit, a dust remover and a dust removal fan, the annular dust collection unit is positioned below the dust remover and is communicated with the dust remover; the dust removal fan is positioned around the dust remover and is connected with the dust remover; the dust collection header pipe is arranged between the annular dust collection unit and the dust remover; the axis of the dust collection header pipe is located in the vertical direction. The air inlet pipe is communicated with the dust collection header pipe; and an air pneumatic valve is arranged on the air inlet pipe. Dust around the calcium carbide furnace stock bin is led into the dust removal fan by arranging the annular dust removal pipe, so that smoke is evacuated, ventilation and dust removal are achieved, and field safety is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental management and relates to a dust removal device for 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. In the production process, the furnace pressure will inevitably fluctuate, causing smoke to appear on the furnace cover and around the calcium carbide furnace. The smoke contains CO, and direct emission will pollute the environment. Once the carbon monoxide concentration exceeds the standard, it will cause poisoning, seriously threatening the personal safety of operators.

[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.

[0004] 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. The flue gas is dispersed on the top of the calcium carbide furnace and the dissipation area is large, resulting in poor dust removal effect and the inability of gas to be evacuated by convection, resulting in excessive carbon monoxide concentration on the fifth floor. In addition, the existing dust removal system uses two fans for dust removal, and the equipment occupies a large area. Utility Model Content

[0005] Aiming at the technical problem that the smoke from the calcium carbide furnace cannot be evacuated by convection, resulting in excessive carbon monoxide concentration in the upper layer of the calcium carbide furnace, the utility model provides a dust removal device for the calcium carbide furnace.

[0006] The utility model provides an annular dust removal pipe to guide the dust around the calcium carbide furnace silo into the dust removal fan, so that the smoke is evacuated, ventilation and dust removal are achieved, and on-site safety is guaranteed.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A calcium carbide furnace dust removal device comprises an annular dust suction unit, a dust collector and a dust removal fan; the annular dust suction unit is located below the dust collector and is connected to the dust collector; the dust removal fan is located around the dust collector and is connected to the dust collector.

[0009] It is further defined that the calcium carbide furnace dust removal device also includes a dust suction main pipe arranged between the annular dust suction unit and the dust collector; the axis of the dust suction main pipe is located in the vertical direction.

[0010] It is further defined that the calcium carbide furnace dust removal device also includes an air inlet pipe connected to the dust suction main pipe; an air pneumatic valve is arranged on the air inlet pipe.

[0011] It is further defined that a dust removal bin is provided in the dust collector, and the dust removal bin includes a dust removal mechanism and a dust cleaning mechanism arranged from top to bottom; the dust removal mechanism is connected to the dust cleaning mechanism through a connecting pipe, and a dust cleaning pneumatic valve is provided on the connecting pipe; the annular dust suction unit is connected to the dust removal mechanism;

[0012] There are one or more dust removal bins, and the plurality of dust removal bins are arranged in parallel in the dust collector.

[0013] It is further defined that there are one or more annular dust suction units; and the plurality of annular dust suction units are symmetrically distributed around the axial direction of the dust suction main pipe.

[0014] It is further defined that the annular dust suction unit includes a first annular dust suction unit; the first annular dust suction unit includes a first dust suction transfer tube, a first annular dust suction pipe and a first dust suction mechanism which are connected in sequence from top to bottom; the first dust suction transfer tube is connected to the dust suction main pipe; the axial direction of the first dust suction transfer tube is perpendicular to the axial direction of the dust suction main pipe; and a first dust suction pneumatic valve is arranged on the first dust suction transfer tube.

[0015] It is further defined that the first dust suction mechanism includes a first dust suction inlet pipe and a first dust suction cover connected from top to bottom; the first dust suction inlet pipe is connected to the first annular dust suction pipe; and a first control valve is arranged on the first dust suction inlet pipe.

[0016] It is further defined that there are a plurality of the first dust suction mechanisms, and the plurality of the first dust suction mechanisms are evenly distributed around the circumference of the first annular dust suction pipe.

[0017] It is further defined that the annular dust suction unit also includes a second annular dust suction unit; the second annular dust suction unit and the first annular dust suction unit are symmetrically distributed along the axial direction of the dust suction main pipe; the second annular dust suction unit is connected to the dust suction main pipe; the structure of the second annular dust suction unit is the same as that of the first annular dust suction unit.

[0018] It is further defined that the calcium carbide furnace dust removal device also includes a temperature sensor and a controller; the temperature sensor is placed on the first dust suction transfer tube, and the controller is respectively connected to the first dust suction pneumatic valve, the temperature sensor, the air pneumatic valve, the dust cleaning pneumatic valve and the dust removal fan.

[0019] The beneficial effects of the utility model are:

[0020] 1. The utility model sets an annular dust suction unit, a dust collector and a dust removal fan, and winds the annular dust suction unit around the outer circumference of the calcium carbide furnace, so as to evacuate the flue gas overflowing from the furnace cover and electrodes around multiple silos of the calcium carbide furnace to the dust collector above, thereby achieving dust removal of the flue gas of the three layers of the calcium carbide furnace, reducing the excessive carbon monoxide concentration on site, and ensuring site safety.

[0021] 2. In the utility model, a dust suction main pipe is arranged between the annular dust suction unit and the 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, thereby achieving the purpose of ventilation and dust removal.

[0022] 3. The utility model sets an air inlet pipe connected to the dust collection main pipe; an air pneumatic valve is set on the air inlet pipe. When it is detected that the temperature of the flue gas sucked into the annular dust collection unit is high, air is filled into the air inlet pipe to cool the flue gas, thereby avoiding the influence of excessive flue gas temperature on the dust collector equipment, ensuring the safe and stable operation of the dust removal, and improving the dust removal effect.

[0023] 4. The utility model arranges a cleaning pneumatic valve on the connecting pipe between the dust removal mechanism and the cleaning mechanism, and controls the cleaning pneumatic valve to make the dust collector completely offline during cleaning, that is, no dust removal is performed during cleaning, which can effectively avoid the removed powder from adhering to the surface of the filter cartridge for the second time.

[0024] 6. 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 with 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 fourth floor and is connected with the first annular dust suction pipe to evacuate the smoke overflowing from the furnace cover and the electrode of the calcium carbide furnace.

[0025] 7. In the utility model, the first dust suction pneumatic valve, the second dust suction pneumatic valve and the dust removal fan are all connected to the controller. Since the furnace pressure detection instrument arranged on the furnace cover of the calcium carbide furnace is also connected to the controller, when the dust removal device is in use, the two dust suction pneumatic valves and the dust removal fan are interlocked, which can not only adjust the frequency of the 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 of the furnace 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 can also ensure that 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a dust removal device provided in Example 1;

[0027] Figure 2 is a schematic diagram of a dust collector;

[0028] Figure 3 A bottom view of the first annular dust suction pipe;

[0029] Figure 4 This is a bottom view of the first annular dust suction pipe;

[0030] Figure 5 A schematic diagram of a dust removal device provided in Example 4;

[0031] Figure 6 A schematic diagram of the application of the dust removal device provided by the utility model in a calcium carbide furnace;

[0032] in:

[0033] 100—annular dust suction unit; 110—first annular dust suction unit; 111—first annular dust suction pipe; 1111—dust suction inlet; 1112—dust suction outlet; 112—first dust suction transfer pipe; 113—first dust suction pneumatic valve; 114—first dust suction mechanism; 1141—first dust suction cover; 1142—first dust suction inlet pipe; 1143—first control valve; 120—second annular dust suction unit; 121—second annular dust suction pipe; 122—second dust suction transfer pipe; 123—second dust suction pneumatic valve; 124—second dust suction mechanism; 1241—second dust suction hood; 1242—second dust suction inlet pipe; 1243—second control valve; 130—dust suction main pipe; 140—dust collector; 1401—dust removal mechanism; 1402—connecting pipe; 1403—ash cleaning pneumatic valve; 1404—ash cleaning mechanism; 1405—injection valve; 1406—dust collector air inlet pipe; 150—dust removal fan; 160—air inlet pipe; 170—air pneumatic valve. DETAILED DESCRIPTION

[0034] Example 1

[0035] See also Figure 1 The calcium carbide furnace dust removal device provided in this embodiment includes an annular dust suction unit 100, a dust collector 140 and a dust removal fan 150; the annular dust suction unit 100 is located below the dust collector 140 and is connected to the dust collector 140; the dust removal fan 150 is located around the dust collector 140 and is connected to the dust collector 140.

[0036] The annular dust collection unit 100 is placed around the calcium carbide furnace silo, so as to evacuate the flue gas overflowing from the calcium carbide furnace cover and the electrode to the dust collector 140 above the calcium carbide furnace, realize the dust removal of the flue gas in the three layers of the calcium carbide furnace, reduce the excessive carbon monoxide concentration on site, and ensure site safety.

[0037] See also Figure 2In this embodiment, a dust removal bin is provided in the dust collector 140, and the dust removal bin includes a dust removal mechanism 1401 and a dust cleaning mechanism 1404 arranged from top to bottom; the dust removal mechanism 1401 is connected to the dust cleaning mechanism 1404 through a connecting pipe 1402, and a dust cleaning pneumatic valve 1403 is provided on the connecting pipe 1402; the annular dust suction unit 100 is connected to the dust removal mechanism 1401.

[0038] Specifically, the dust removal mechanism 1401 is mainly used to vacuum the inhaled flue gas. The dust removal mechanism 1401 has the same structure as the existing dust removal device. Preferably, the dust collector 140 adopts a downward air inlet filtration method, which can suck the smoke in the flue gas into the dust removal mechanism 1401, and the gas after dust removal is discharged from the dust removal mechanism 1401 for subsequent treatment or directly discharged into the atmosphere; the dust sucked into the dust removal mechanism 1401 enters the cleaning mechanism 1404 from the bottom of the dust removal mechanism 1401 through the connecting pipe 1402, and then is discharged from the dust collector 140 for centralized treatment, which can be sold outside and reused.

[0039] During implementation, the dust removal bin also includes a blowing mechanism arranged above the dust removal mechanism 1401, which blows air into the dust removal mechanism 1401. A blowing valve 1405 is also arranged on the blowing mechanism. The blowing valve 1405 is a submerged 3-inch right-angle pulse valve with a large size to improve the blowing effect.

[0040] In this embodiment, there are one or more dust removal bins, and the multiple dust removal bins are arranged in parallel in the dust collector 140.

[0041] Preferably, there are 7 dust removal bins, and a cleaning pneumatic valve 1403 is respectively arranged between the dust removal mechanism 1401 and the cleaning mechanism 1404 of each dust removal bin. When the dust removal bin needs to unload dust, the cleaning pneumatic valve 1403 arranged on the dust removal bin is adjusted to a fully offline state, that is, the dust removal mechanism 1401 and the cleaning mechanism 1404 of the dust removal bin that needs to unload dust are not connected. This can effectively avoid the accumulated and removed powder in the cleaning mechanism 1404 from being sucked back into the dust removal mechanism 1401, and secondarily attached to the filter cartridge surface of the dust removal mechanism 1401, thereby improving the cleaning efficiency.

[0042] During implementation, the dust collector 140 is externally connected to a dust collector air inlet pipe 1406 , and the annular dust suction unit 100 is connected to the dust removal mechanism 1401 via the dust collector air inlet pipe 1406 .

[0043] The dust removal fan 150 is used to provide power to the dust collector 140. Through the dust removal fan 150, the smoke is sucked into the dust removal mechanism 1401 through the annular dust suction unit 100 and the dust collector air inlet pipe 1406 for dust removal.

[0044] Preferably, the withstand pressure of the dust collector 140 is ±7Kpa, and the air leakage of the dust collector 140 is ≤4%; the dust removal fan 150 is a variable frequency fan, which achieves energy saving while ensuring the dust removal effect, and the operating frequency is 45Hz~50Hz; the dust collector air inlet pipe 1406 adopts a spiral welded pipe or a square air duct, and the material is Q235b.

[0045] An inspection door is provided on the top of the dust collector 140 for maintaining the filter cartridge and air duct, etc. The filter cartridge can be replaced outside the dust collector 140 without entering the dust collector 140; a rainproof canopy is provided on the top of the dust collector 140 to facilitate inspection and protection of the dust collector 140.

[0046] In this embodiment, the calcium carbide furnace dust removal device further includes a dust collection main pipe 130 disposed between the annular dust collection unit 100 and the dust collector 140; the axis of the dust collection main pipe 130 is located in the vertical direction.

[0047] Since the main flue gas overflowing from the calcium carbide furnace is concentrated on the third floor of the calcium carbide furnace, the dust collector 140 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 level is discharged upward to the dust collector 140 at the higher level through the vertical dust suction main pipe 130. Specifically, the dust suction main pipe 130 is connected to the dust collector air inlet pipe 1406.

[0048] Example 2

[0049] Based on Example 1, see Figure 1 The calcium carbide furnace dust removal device also includes an air inlet pipe 160 connected to the dust suction main pipe 130; an air pneumatic valve 170 is arranged on the air inlet pipe 160.

[0050] Since the flue gas temperature in the calcium carbide furnace is relatively high, when the high-temperature flue gas enters the dust collector 140, it will damage the filter bag (or filter cartridge) of the dust collector 140, resulting in low dust removal efficiency and serious damage to the equipment; therefore, a temperature detector is set on the annular dust collection unit 100. When the flue gas temperature is detected to be high (greater than 200°C), the air pneumatic valve 170 is opened to allow outside air to enter the dust collection main pipe 130. The air is used as a cold medium to cool the flue gas, thereby ensuring the safe and stable operation of the dust collector 140 and improving the dust removal efficiency.

[0051] Example 3

[0052] Based on Example 1 or Example 2, in this embodiment, there is one annular dust suction unit 100.

[0053] In this embodiment, the annular dust suction unit 100 includes a first annular dust suction unit 110; the first annular dust suction unit 110 includes a first dust suction transfer tube 112, a first annular dust suction pipe 111 and a first dust suction mechanism 114 which are connected in sequence from top to bottom; the first dust suction transfer tube 112 is connected to the dust suction main pipe 130; the axial direction of the first dust suction transfer tube 112 is perpendicular to the axial direction of the dust suction main pipe 130; and a first dust suction pneumatic valve 113 is arranged on the first dust suction transfer tube 112.

[0054] See also Figure 3 and Figure 4 The first annular dust suction pipe 111 is an annular pipe, a dust suction inlet 1111 is arranged on the bottom surface thereof, a dust suction outlet 1112 is arranged at the upper position of the side wall thereof, the dust suction inlet 1111 is connected with the dust suction outlet 1112, the dust suction inlet 1111 is connected with the first dust suction mechanism 114, and the dust suction outlet 1112 is connected with the first dust suction transfer pipe 112.

[0055] The first dust suction mechanism 114 includes a first dust suction inlet pipe 1142 and a first dust suction cover 1141 which are connected from top to bottom; the first dust suction inlet pipe 1142 is connected to the first annular dust suction pipe 111 ; and a first control valve 1143 is provided on the first dust suction inlet pipe 1142 .

[0056] Preferably, the first dust hood 1141 is a conical hood that expands downward to increase the dust collection area; the first dust hood 1141 is made on-site using a 6 mm thick steel plate.

[0057] Preferably, the first control valve 1143 is a manual butterfly valve; the first dust suction pneumatic valve 113 is a pneumatic butterfly valve; the axial direction of the first dust suction inlet pipe 1142 is parallel to the axial direction of the dust suction main pipe 130 .

[0058] In this embodiment, there are multiple first dust suction mechanisms 114 , and the multiple first dust suction mechanisms 114 are evenly distributed around the circumference of the first annular dust suction pipe 111 .

[0059] In this embodiment, the number of first dust suction mechanisms 114 is 8, and the number of dust suction inlets 1111 is 8, which are evenly distributed on the bottom surface of the first annular dust suction tube 111. The 8 first dust suction mechanisms 114 are arranged in parallel, and the bottom end of each first dust suction inlet tube 1142 is connected to a first dust suction hood 1141, and the top end of each first dust suction inlet tube 1142 is connected to the corresponding dust suction inlet 1111 on the bottom surface of the first annular dust suction tube 111.

[0060] Example 4

[0061] On the basis of Example 1 or Example 2, in this embodiment, there are multiple annular dust suction units 100; the multiple annular dust suction units 100 are symmetrically distributed around the axial direction of the dust suction main pipe 130.

[0062] Specifically, the number of the annular dust suction units 100 corresponds to the number of the calcium carbide furnaces. Each calcium carbide furnace is provided with an annular dust suction unit 100 to remove dust from the flue gas overflowing from the calcium carbide furnace.

[0063] See also Figure 5 Preferably, there are two annular dust suction units 100 , including a first annular dust suction unit 110 and a second annular dust suction unit 120 ; the second annular dust suction unit 120 and the first annular dust suction unit 110 are symmetrically distributed along the axial direction of the dust suction main pipe 130 ; the second annular dust suction unit 120 is connected to the dust suction main pipe 130 .

[0064] The structure of the first annular dust suction unit 110 refers to that of Embodiment 3; the structure of the second annular dust suction unit 120 is the same as that of the first annular dust suction unit 110 .

[0065] For details, see Figure 5 The second annular dust suction unit 120 is an annular pipe, and the second annular dust suction unit 120 includes a second dust suction transfer tube 122, a second annular dust suction pipe 121 and a second dust suction mechanism 124 which are connected in sequence from top to bottom; the second dust suction transfer tube 122 is connected to the dust suction main pipe 130; the axial direction of the second dust suction transfer tube 122 is perpendicular to the axial direction of the dust suction main pipe 130; and a second dust suction pneumatic valve 123 is arranged on the second dust suction transfer tube 122.

[0066] The second dust suction mechanism 124 includes a second dust suction inlet pipe 1242 and a second dust suction cover 1241 which are connected from top to bottom; the second dust suction inlet pipe 1242 is connected to the second annular dust suction pipe 121 ; and a second control valve 1243 is provided on the first dust suction inlet pipe 1242 .

[0067] Preferably, the second dust suction hood 1241 is a conical hood that expands downward to increase the dust suction area; the second dust suction pneumatic valve 123 is a pneumatic butterfly valve, and the second control valve 1243 is a manual butterfly valve; the axial direction of the second dust suction inlet pipe 1242 is parallel to the axial direction of the dust suction main pipe 130.

[0068] In this embodiment, there are multiple second dust suction mechanisms 124 , and the multiple second dust suction mechanisms 124 are evenly distributed around the circumference of the second annular dust suction pipe 121 .

[0069] In this embodiment, the number of second dust suction mechanisms 124 is 8, which are evenly distributed along the circumference of the second annular dust suction tube 121. The 8 second dust suction mechanisms 124 are arranged in parallel. The bottom end of each second dust suction inlet pipe 1242 is connected to a second dust suction hood 1241, and the top end of each second dust suction inlet pipe 1242 is connected to the bottom surface of the second annular dust suction tube 121.

[0070] Example 5

[0071] On the basis of Example 4, the calcium carbide furnace dust removal device provided in this embodiment also includes a temperature sensor and a controller; the temperature sensor is placed on the first dust suction transfer tube 112, and a temperature sensor is also arranged on the second dust suction transfer tube 122.

[0072] The controller is respectively connected to the first dust suction pneumatic valve 113 , the second dust suction pneumatic valve 123 , the temperature sensor, the air pneumatic valve 170 , the dust cleaning pneumatic valve 1403 and the dust removal fan 150 .

[0073] When the dust collector 140 is being cleaned, the cleaning pneumatic valve 1403 is controlled by the controller so that the dust collector 140 is in a completely offline state, that is, dust removal is not performed during cleaning, which can effectively prevent the removed powder from adhering to the filter cartridge surface of the dust collector 140 for the second time.

[0074] Since the furnace pressure detection instrument installed on the furnace cover of the calcium carbide furnace will also be connected to the controller, the first dust suction pneumatic valve 113, the second dust suction pneumatic valve 123 and the dust removal fan 150 are all connected to the controller and form an interlock. Not only can the frequency of the dust removal fan 150 be adjusted according to the furnace pressure of the 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 of 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.

[0075] In this embodiment, the controller is a programmable PLC controller produced by Ximen Factory, and it also has independent indoor and on-site manual operation functions, which facilitates the normal operation of the dust removal device during maintenance and overhaul, and realizes unattended automatic operation.

[0076] See Figure 6 Taking two calcium carbide furnaces in the calcium carbide section as an example, the installation and working process of the calcium carbide furnace dust removal device provided by the utility model are explained.

[0077] A first annular dust suction unit 110 is correspondingly provided on the No. 1 calcium carbide furnace, and a second annular dust suction unit 120 is correspondingly provided on the No. 2 calcium carbide furnace.

[0078] Taking the installation of the first annular dust suction unit 110 as an example, 8 dust suction ports are set on the ground of the fourth floor of the No. 1 calcium carbide furnace, the first annular dust suction pipe 111 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 1141 are located on the top of the third floor of the calcium carbide furnace, and 8 first dust suction inlet pipes 1142 pass through the corresponding dust suction ports and are located above the ground of the fourth floor of the calcium carbide furnace, and are correspondingly connected to the 8 dust suction inlets 1111 on the first annular dust suction pipe 111; the first dust suction transfer pipe 112 is located on the first annular dust suction pipe On the upper right side of 111, the first dust suction switching tube 112 is placed horizontally, and the left end of the first dust suction switching tube 112 is connected to the dust suction outlet 1112 on the first annular dust suction pipe 111, the dust suction main pipe 130 is placed vertically, the bottom end of the dust suction main pipe 130 is located on the upper part of the fourth floor of the calcium carbide furnace and is connected to the right end of the first dust suction switching tube 112, the dust suction main pipe 130 passes upward through the fifth and sixth floors of the calcium carbide furnace, and the top end of the dust suction main pipe 130 is located above the sixth floor of the calcium carbide furnace and is connected to the inside of the dust collector 140 through the dust collector air inlet pipe 1406.

[0079] When installing each pipe and dust hood in the dust removal device, it must be ensured that it is well insulated from the live equipment on the calcium carbide furnace, and that the insulation protection measures at the connections with the valves on the calcium carbide furnace are good; an insulating layer should be set between the dust hood and the outer wall of the platform on the fourth floor of the calcium carbide furnace.

[0080] See also Figure 6 The second annular dust suction unit 120 is installed on the No. 2 calcium carbide furnace according to the above method, and the second annular dust suction unit 120 is symmetrically arranged with the first annular dust suction unit 110.

[0081] During implementation, the dust collector 140 collects dust and smoke for two calcium carbide furnaces at the same time. When in normal production, the controller opens the first dust suction pneumatic valve 113 and the second dust suction pneumatic valve 123 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 second dust suction pneumatic valve 123 is adjusted down, and the controller controls the frequency of the dust removal fan 150 to automatically increase to ensure the dust collection and ventilation effect on the top of the No. 1 calcium carbide furnace, which can ensure the ventilation of the two calcium carbide furnaces when they are normal, and ensure that when one calcium carbide furnace collapses, a large amount of smoke is discharged in the shortest time. And the pneumatic regulating valve of the other furnace is closed down.

[0082] 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 calcium carbide furnace dust removal device, characterized in that: It comprises an annular dust suction unit (100), a dust collector (140) and a dust removal fan (150); the annular dust suction unit (100) is located below the dust collector (140) and is in communication with the dust collector (140); the dust removal fan (150) is located around the dust collector (140) and is connected to the dust collector (140).

2. The calcium carbide furnace dust removal device according to claim 1, characterized in that: The calcium carbide furnace dust removal device further comprises a dust collection main pipe (130) arranged between the annular dust collection unit (100) and the dust collector (140); the axis of the dust collection main pipe (130) is located in the vertical direction.

3. The calcium carbide furnace dust removal device according to claim 2, characterized in that: The calcium carbide furnace dust removal device also includes an air inlet pipe (160) connected to the dust suction main pipe (130); an air pneumatic valve (170) is arranged on the air inlet pipe (160).

4. The calcium carbide furnace dust removal device according to claim 3 is characterized in that: A dust removal bin is arranged in the dust collector (140), and the dust removal bin comprises a dust removal mechanism (1401) and a dust cleaning mechanism (1404) arranged from top to bottom; the dust removal mechanism (1401) is connected to the dust cleaning mechanism (1404) via a connecting pipe (1402), and a dust cleaning pneumatic valve (1403) is arranged on the connecting pipe (1402); the annular dust suction unit (100) is connected to the dust removal mechanism (1401); There are one or more dust removal bins, and the plurality of dust removal bins are arranged in parallel in the dust collector (140).

5. The calcium carbide furnace dust removal device according to claim 4, characterized in that: There are one or more annular dust suction units (100); the plurality of annular dust suction units (100) are symmetrically distributed around the axial direction of the dust suction main pipe (130).

6. The calcium carbide furnace dust removal device according to claim 5, characterized in that: The annular dust suction unit (100) comprises a first annular dust suction unit (110); the first annular dust suction unit (110) comprises a first dust suction transfer tube (112), a first annular dust suction pipe (111) and a first dust suction mechanism (114) which are connected in sequence from top to bottom; the first dust suction transfer tube (112) is connected to a dust suction main pipe (130); the axial direction of the first dust suction transfer tube (112) is perpendicular to the axial direction of the dust suction main pipe (130); and a first dust suction pneumatic valve (113) is provided on the first dust suction transfer tube (112).

7. The calcium carbide furnace dust removal device according to claim 6, characterized in that: The first dust suction mechanism (114) comprises a first dust suction inlet pipe (1142) and a first dust suction cover (1141) which are connected from top to bottom; the first dust suction inlet pipe (1142) is connected to the first annular dust suction pipe (111); and a first control valve (1143) is provided on the first dust suction inlet pipe (1142).

8. The calcium carbide furnace dust removal device according to claim 7, characterized in that: There are a plurality of the first dust suction mechanisms (114), and the plurality of the first dust suction mechanisms (114) are evenly distributed around the circumference of the first annular dust suction pipe (111).

9. The calcium carbide furnace dust removal device according to claim 6, characterized in that: The annular dust suction unit (100) further comprises a second annular dust suction unit (120); the second annular dust suction unit (120) and the first annular dust suction unit (110) are symmetrically distributed along the axial direction of the dust suction main pipe (130); the second annular dust suction unit (120) is connected to the dust suction main pipe (130); the structure of the second annular dust suction unit (120) is the same as that of the first annular dust suction unit (110).

10. The calcium carbide furnace dust removal device according to claim 6, characterized in that: The calcium carbide furnace dust removal device also includes a temperature sensor and a controller; the temperature sensor is placed on the first dust suction transfer tube (112), and the controller is respectively connected to the first dust suction pneumatic valve (113), the temperature sensor, the air pneumatic valve (170), the dust cleaning pneumatic valve (1403) and the dust removal fan (150).

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