CN110671925A - Closed quick feeding system for double-chamber shaft kiln - Google Patents
Closed quick feeding system for double-chamber shaft kiln Download PDFInfo
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- CN110671925A CN110671925A CN201910974100.7A CN201910974100A CN110671925A CN 110671925 A CN110671925 A CN 110671925A CN 201910974100 A CN201910974100 A CN 201910974100A CN 110671925 A CN110671925 A CN 110671925A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
- F27B1/04—Combinations or arrangements of shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/20—Arrangements of devices for charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B1/00—Shaft or like vertical or substantially vertical furnaces
- F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
- F27B1/26—Arrangements of controlling devices
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a closed type rapid charging system for a double-chamber shaft kiln, which comprises 1 bidirectional material distributing storage bin, 2 material storing and charging sealing valves and 2 gas-material sharing reversing valves; the gas-material shared reversing valve consists of a reversing valve body, a two-way valve mechanism and a one-way valve mechanism; the reversing valve body is provided with a waste gas outlet, a combustion-supporting air inlet, a reversing valve feeding hole and a reversing valve discharging hole, and a bidirectional valve plate of the bidirectional valve mechanism is used for respectively sealing and sealing the waste gas outlet or the combustion-supporting air inlet in different working states; the one-way valve plate of the one-way valve mechanism is used for sealing and sealing the feed port of the reversing valve; the storage and charging sealing valve consists of an upper sealing valve and a lower storage bin. The invention realizes the feeding operation under three states of heating, reversing and heat storage of the kiln chamber on the premise of ensuring that the gas in the kiln does not leak during feeding, greatly improves the feeding operation time, is beneficial to the stability of the thermal regulation of the double-chamber vertical kiln, and simultaneously prolongs the equipment maintenance time.
Description
Technical Field
The invention relates to the technical field of double-chamber shaft kilns, in particular to a closed type quick feeding system for a double-chamber shaft kiln.
Background
The double-chamber shaft kiln is an important thermal kiln, and the kiln type has the outstanding advantage that the heat consumption is lower than that of other kiln types. The production mode is that two kiln chambers are communicated with each other and are heated alternately. When one kiln chamber is heated, the generated waste gas with a large amount of heat flows into the other kiln chamber through the channel to preheat the materials in the kiln chamber. The above steps are repeated alternately, so that the purpose of utilizing the waste heat of the waste gas is achieved, and the use efficiency of the fuel is improved.
The material flow direction of the double-chamber shaft kiln is that the material is added from an inlet (a kiln opening) at the top of a kiln chamber, and the material passes through a preheating zone, a burning zone and a cooling zone under the action of a discharging machine at the bottom of the kiln chamber until the material is discharged from the kiln chamber.
The working system of the alternative heating of the double-chamber shaft kiln and the material flow trend cause the double-chamber shaft kiln to have a disadvantage, namely the available time for charging the double-chamber shaft kiln is greatly shortened. Normally, when the kiln chamber is in a reversing and heating state, the kiln chamber can not be charged, and charging is allowed only when the kiln chamber is in a heat storage state, so that the charging time is less than 50% of the total time. The reason is that when the kiln chamber is in a calcining state, combustion air is blown into the top of the kiln chamber to form positive pressure, so that the airflow direction is from top to bottom and is the same as the material flow direction and the fuel direction. At the moment, if the kiln door is opened for feeding, firstly, the pressure of the kiln chamber is lost, normal airflow and material flow direction cannot be formed, and the material calcination is extremely influenced. Secondly, a large amount of dust-containing gas leaks out to pollute the operating environment.
Disclosure of Invention
The invention provides a closed type rapid feeding system for a double-hearth shaft kiln, which realizes feeding operation under three states of heating, reversing and heat storage of the kiln hearth on the premise of ensuring that gas in the kiln does not leak during feeding, greatly improves the feeding operation time, is beneficial to the stability of a thermal regulation system of the double-hearth shaft kiln, prolongs the equipment maintenance time and is beneficial to the long-term stable operation of the double-hearth shaft kiln.
In order to achieve the purpose, the invention adopts the following technical scheme:
a closed rapid charging system for a double-hearth shaft kiln comprises 1 bidirectional material distribution storage bin, 2 material storage and charging sealing valves and 2 gas-material shared reversing valves; 2 kiln mouths of the double-chamber shaft kiln are respectively provided with a gas-material shared reversing valve, and the gas-material shared reversing valve consists of a reversing valve body, a two-way valve mechanism and a one-way valve mechanism; the reversing valve body is provided with a waste gas outlet, a combustion air inlet, a reversing valve feeding port and a reversing valve discharging port, wherein the reversing valve discharging port is hermetically connected with the corresponding kiln opening; the two-way valve plate of the two-way valve mechanism is used for respectively sealing and sealing the waste gas outlet or the combustion air inlet under different working states; the check valve plate of the check valve mechanism is used for sealing and sealing the feed port of the reversing valve; the material storage and feeding sealing valve consists of an upper sealing valve and a lower storage bin, the upper sealing valve is provided with a sealing valve feed port which is hermetically connected with a corresponding bin discharge port of the bidirectional material distribution storage bin, and a sealing valve plate of the upper sealing valve is used for sealing the sealing valve feed port; the upper sealing valve is provided with a sealing valve discharge hole which is butted with a storage bin feed inlet of the lower storage bin; the lower storage bin is provided with a storage bin discharge hole which is hermetically connected with a reversing valve feed inlet of a corresponding gas-material shared reversing valve.
The top of the bidirectional material distribution storage bin is provided with a bin feed inlet, the bottom of the bidirectional material distribution storage bin is symmetrically provided with 2 bin discharge outlets, and the included angle between the axis of each bin discharge outlet and the vertical center line of each bin is 45 degrees; the volume of the bidirectional material-distributing storage bin is larger than that of a hopper of the single-bucket elevator.
The upper sealing valve consists of a sealing valve body, a sealing valve plate and a sealing valve plate driving mechanism, wherein the upper part of the sealing valve body is provided with a sealing valve feed inlet, the sealing valve plate is arranged in the sealing valve body close to the sealing valve feed inlet, and the sealing valve plate swings in the sealing valve body under the driving of the sealing valve plate driving mechanism and can seal or open the sealing valve feed inlet; the bottom of the sealing valve body is provided with a sealing valve discharge hole which is butted with a storage bin feed inlet of a lower storage bin; the bottom of the lower storage bin is provided with a storage bin discharge hole which is hermetically connected with a reversing valve feed inlet of a gas-material shared reversing valve.
The top of the valve body of the sealing valve is provided with an air pressure balance connecting pipe, the air pressure balance connecting pipe is respectively connected with the bidirectional material distribution storage bin through an air pressure balance pipeline I, the air pressure balance pipeline II is connected with a gas-material shared reversing valve, the air pressure balance pipeline I is provided with a first electromagnetic valve, and the air pressure balance pipeline II is provided with a second electromagnetic valve.
The sealing valve plate driving mechanism consists of a sealing valve cylinder, a sealing valve swing rod, a sealing valve shaft and a sealing valve swing arm, wherein the fixed end of the sealing valve cylinder is fixed on a valve casing outside a sealing valve body through a sealing valve cylinder support, the extending end of the sealing valve cylinder is connected with one end of the sealing valve swing rod, the other end of the sealing valve swing rod is in key connection with the sealing valve shaft, one end of the sealing valve swing arm is fixedly connected with the sealing valve shaft, and the other end of the sealing valve swing arm is; and under the drive of the sealing valve oil cylinder, the sealing valve swing rod drives the sealing valve shaft to rotate and enables the sealing valve plate to swing through the sealing valve swing arm.
A sealing valve blanking chute is arranged at the sealing valve feeding port, a sealing ring seat I is arranged on the outer side of the sealing valve blanking tube, and a sealing ring I is arranged in the sealing ring seat I; and a first sealing opening is formed in one side, facing the feeding opening of the sealing valve, of the sealing valve plate, and after the sealing valve plate swings in place, the first sealing opening is tightly pressed on the first sealing ring to seal the feeding opening of the sealing valve.
The lower storage bin is detachably connected with the upper sealing valve; the volume of the lower storage bin is more than or equal to 4 times of the volume of the hopper of the single-hopper hoister.
A waste gas outlet is arranged on one side of the top of the reversing valve body and connected with an external waste gas pipeline, and a combustion-supporting air inlet is arranged on the side wall of the reversing valve body close to the waste gas outlet and connected with an external combustion-supporting air pipeline; one side of the reversing valve body opposite to the combustion air inlet is provided with an inclined reversing valve feeding hole which is hermetically connected with a storage bin discharging hole of a lower storage bin, and the included angle between the axis of the reversing valve feeding hole and the horizontal plane is more than 40 degrees; the bottom of the reversing valve body is provided with a reversing valve discharge port connected with a corresponding kiln opening; the two-way valve mechanism is arranged at one side close to the waste gas outlet and the combustion air inlet, a two-way valve plate in the two-way valve mechanism is positioned in the reversing valve body, the two-way valve plate is driven by the two-way valve driving mechanism to be switched among 2 working positions, the two-way valve plate can seal the waste gas outlet at one working position and seal the combustion air inlet at the other working position; the one-way valve mechanism is installed on one side close to the feed port of the reversing valve, a one-way valve plate in the one-way valve mechanism is located inside a valve body of the reversing valve and is driven by the one-way valve driving mechanism to switch among 2 working positions, the one-way valve plate can seal the feed port of the reversing valve in one of the working positions, and an included angle between the one-way valve plate and the feed port of the reversing valve in the other working position is larger than 40 degrees.
The bidirectional valve mechanism consists of a bidirectional valve driving mechanism and a bidirectional valve plate, wherein the bidirectional valve driving mechanism consists of a bidirectional valve oil cylinder, a bidirectional valve swing rod, a bidirectional valve shaft and a bidirectional valve swing arm; under the drive of the two-way valve oil cylinder, the two-way valve swing rod drives the two-way valve plate to rotate around the axis of the two-way valve shaft through the two-way valve shaft and the two-way valve swing arm; a second sealing ring and a third sealing ring are respectively arranged on two sides of the bidirectional valve plate, a second sealing port and a third sealing port are respectively arranged in the reversing valve body on the inner side of the waste gas outlet and the inner side of the combustion air inlet, and the second sealing ring and the third sealing ring are matched with the second sealing port and the third sealing port on the corresponding side to realize the sealing of the corresponding interface on the reversing valve body; the second sealing port and the third sealing port are both made of heat-resistant stainless steel materials.
The one-way valve mechanism consists of a one-way valve driving mechanism and a one-way valve plate, wherein the one-way valve driving mechanism consists of a one-way valve oil cylinder, a one-way valve swing rod, a one-way valve shaft and a one-way valve swing arm; under the drive of the one-way valve oil cylinder, the one-way valve swing rod drives the one-way valve plate to rotate around the axis of the one-way valve shaft through the one-way valve shaft and the one-way valve swing arm; a reversing valve feeding chute is arranged at the reversing valve feeding port, and extends a certain distance into the reversing valve body; a second sealing ring seat is arranged on the outer side of the reversing valve blanking chute of the extension section, a fourth sealing ring is arranged in the second sealing ring seat, and the lower edge of the fourth sealing ring is higher than that of the reversing valve blanking chute; one side of the one-way valve plate, which faces the feed inlet of the reversing valve, is provided with a fourth sealing opening, the fourth sealing opening is of a bowl-shaped structure, the bowl opening is made of stainless steel, and the inner diameter of the bowl opening is larger than the outer diameter of a discharge chute of the reversing valve; the sealing of the feed port of the reversing valve is realized through the matching of the sealing port four and the sealing ring four.
Compared with the prior art, the invention has the beneficial effects that:
1) the existing double-chamber shaft kiln usually adopts a mode of opening a kiln door and then feeding, the kiln chamber must be under negative pressure during feeding, and the feeding time is less than 45 percent of the total operation time; after the closed rapid feeding system is adopted, the feeding time is close to the total operation time;
2) a closed rapid feeding system is adopted, 2-3 times of single feeding amount of a lifter can be added into the kiln at one time, and the stability of a thermal system in the kiln is facilitated;
3) after the closed type rapid charging system is adopted, the reversing and discharging operations of the double-hearth shaft kiln can be simultaneously completed in the same equipment, so that the required equipment quantity is saved;
4) the closed rapid charging system has the characteristics of simple and compact structure, convenience in operation and the like.
Drawings
FIG. 1 is a front view of a closed rapid charging system for a dual-chamber shaft kiln according to the present invention.
FIG. 2 is a side view of a closed rapid charging system for a dual-chamber shaft kiln according to the present invention.
Fig. 3 is a schematic view of the structure of the storage hopper sealing valve of the present invention.
Fig. 4 is a first schematic structural view of the upper sealing valve of the present invention.
Fig. 5 is a second schematic structural view of the upper sealing valve of the present invention.
Fig. 6 is an enlarged view of a portion a in fig. 5.
Fig. 7 is a first structural schematic diagram of the gas-material shared reversing valve.
Fig. 8 is a schematic structural diagram of a gas-material shared reversing valve of the invention.
Fig. 9 is an enlarged view of a portion B in fig. 8.
Fig. 10 is an enlarged view of a portion C in fig. 8.
Fig. 11 is a view D-D in fig. 8.
In the figure: 1. two-way material distribution storage bin 11, bin feed inlet 12, bin discharge outlet 2, storage and feed sealing valve 21, upper sealing valve 211, sealing valve feed inlet 212, sealing valve cylinder support 213, sealing valve cylinder 214, sealing valve swing link 215, sealing valve shaft 216, sealing valve swing link 217, sealing valve plate 218, seal port I219, seal ring support I220, seal ring I221, air pressure balance connecting pipe 22, lower storage bin 3, air and material shared reversing valve 311, combustion air inlet 312, two-way valve swing link 313, two-way valve cylinder 314, waste gas outlet 315, two-way valve cylinder support 316, reversing valve feed inlet 317, one-way valve shaft 318, one-way valve swing link 319, one-way valve cylinder 320, reversing valve body 321, one-way valve cylinder support 322, reversing valve discharge outlet 323, seal port II 324, seal ring II 325, seal ring III 326, seal port III 327, one-way valve swing link 328, one-way valve swing Valve plate 329, reversing valve blanking chute 330, seal ring IV 331, seal ring seat II 332, bidirectional valve shaft 333, bidirectional valve swing arm 334, bidirectional valve plate 4, waste gas pipeline 5, combustion air pipeline
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
as shown in fig. 1 and fig. 2, the closed rapid charging system for a double-hearth shaft kiln of the present invention comprises 1 bidirectional material-distributing storage bin 1, 2 material-storing and charging sealing valves 2, and 2 gas-material common reversing valves 3; 2 kiln mouths of the double-chamber shaft kiln are respectively provided with a gas-material shared reversing valve 3, and the gas-material shared reversing valve 3 consists of a reversing valve body 320, a two-way valve mechanism and a one-way valve mechanism; the reversing valve body 320 is provided with a waste gas outlet 314, a combustion air inlet 311, a reversing valve feeding port 316 and a reversing valve discharging port 322, wherein the reversing valve discharging port 322 is hermetically connected with a corresponding kiln opening; the bidirectional valve plate 334 of the bidirectional valve mechanism is used for sealing and sealing the waste gas outlet 314 or the combustion air inlet 311 respectively under different working states; the check valve plate 328 of the check valve mechanism is used for sealing and sealing the feed port 316 of the reversing valve; as shown in fig. 3, the storage charging seal valve is composed of an upper seal valve 21 and a lower storage bin 22, the upper seal valve 21 is provided with a seal valve feed port 211 which is hermetically connected with the corresponding bin discharge port 12 of the bidirectional material-dividing storage bin 1, and a seal valve plate 217 of the upper seal valve 21 is used for hermetically sealing the seal valve feed port 211; the upper sealing valve 21 is provided with a sealing valve discharge hole which is butted with a storage bin feed inlet of the lower storage bin 22; the lower storage bin 22 is provided with a storage bin discharge port which is hermetically connected with a reversing valve feed port 316 of the corresponding gas-material shared reversing valve 3.
The top of the bidirectional material distribution storage bin 1 is provided with a bin feed inlet 11, the bottom of the bidirectional material distribution storage bin is symmetrically provided with 2 bin discharge outlets 12, and the included angle between the axis of each bin discharge outlet 12 and the vertical center line of each bin is 45 degrees; the volume of the bidirectional material-distributing storage bin 1 is larger than that of a hopper of the single-bucket elevator.
As shown in fig. 4-6, the upper sealing valve 21 is composed of a sealing valve body, a sealing valve plate 217 and a sealing valve plate driving mechanism, the upper part of the sealing valve body is provided with a sealing valve feed port 211, the sealing valve plate 217 is arranged in the sealing valve body near the sealing valve feed port 211, the sealing valve plate 217 is driven by the sealing valve plate driving mechanism to swing in the sealing valve body, and the sealing valve feed port 211 can be sealed and closed or opened; the bottom of the sealing valve body is provided with a sealing valve discharge hole which is butted with a storage bin feed inlet of the lower storage bin 22; the bottom of the lower storage bin 22 is provided with a storage bin discharge hole which is hermetically connected with a reversing valve feed port 316 of the gas-material shared reversing valve 3.
The top of the valve body of the sealing valve is provided with an air pressure balance connecting pipe 221, the air pressure balance connecting pipe 221 is respectively connected with the bidirectional material distribution storage bin 1 through an air pressure balance pipeline I, the air material sharing reversing valve 3 is connected through an air pressure balance pipeline II, the air pressure balance pipeline I is provided with a first electromagnetic valve, and the air pressure balance pipeline II is provided with a second electromagnetic valve.
The sealing valve plate driving mechanism is composed of a sealing valve cylinder 213, a sealing valve swing arm 214, a sealing valve shaft 215 and a sealing valve swing arm 216, wherein the fixed end of the sealing valve cylinder 213 is fixed on a valve housing outside the sealing valve body through a sealing valve cylinder support 212, the extending end of the sealing valve cylinder 213 is connected with one end of the sealing valve swing arm 214, the other end of the sealing valve swing arm 214 is connected with the sealing valve shaft 215 through a key, one end of the sealing valve swing arm 216 is fixedly connected with the sealing valve shaft 215, and the other end of the sealing valve swing arm; driven by the sealing valve cylinder 213, the sealing valve swing arm 214 rotates the sealing valve shaft 215 and swings the sealing valve plate 217 through the sealing valve swing arm 216.
A sealing valve blanking chute is arranged at the position of the sealing valve feeding hole 211, a first sealing ring seat 219 is arranged on the outer side of the sealing valve blanking chute, and a first sealing ring 220 is arranged in the first sealing ring seat 219; and a first sealing opening 218 is formed in one side, facing the sealing valve feeding opening 211, of the sealing valve plate 217, and after the sealing valve plate 217 swings in place, the first sealing opening 218 is pressed on the first sealing ring 220 to seal the sealing valve feeding opening 211.
The lower storage bin 22 is detachably connected with the upper sealing valve 21; the volume of the lower storage bin 22 is more than or equal to 4 times of the volume of the hopper of the single bucket elevator.
As shown in fig. 7-11, an exhaust gas outlet 314 is provided on one side of the top of the reversing valve body 320 to connect with an external exhaust gas pipe 4, and a combustion air inlet 311 is provided on the side wall of the reversing valve body 320 near the exhaust gas outlet 314 to connect with an external combustion air pipe 5; an inclined reversing valve feeding hole 316 is arranged on one side of the reversing valve body 320 opposite to the combustion air inlet 311 and is in sealing connection with a storage bin discharging hole of the lower storage bin 22, and the included angle between the axis of the reversing valve feeding hole 316 and the horizontal plane is more than 40 degrees; the bottom of the reversing valve body 320 is provided with a reversing valve discharge hole 322 connected with a corresponding kiln opening; the two-way valve mechanism is arranged at one side close to the waste gas outlet 314 and the combustion air inlet 311, a two-way valve plate 334 in the two-way valve mechanism is positioned inside the reversing valve body 320, the two-way valve plate 334 is driven by the two-way valve driving mechanism to be switched among 2 working positions, the two-way valve plate 334 can seal and seal the waste gas outlet 314 at one working position, and can seal and seal the combustion air inlet 311 at the other working position; the one-way valve mechanism is installed on one side close to the reversing valve feed port 316, a one-way valve plate 328 in the one-way valve mechanism is located inside the reversing valve body 320, the one-way valve plate 328 is driven by the one-way valve driving mechanism to switch among 2 working positions, the one-way valve plate 328 can seal and seal the reversing valve feed port 316 in one of the working positions, and an included angle between the one-way valve plate 328 and the reversing valve feed port 316 in the other working position is larger than 40 degrees.
As shown in fig. 7 and 11, the two-way valve mechanism is composed of a two-way valve driving mechanism and a two-way valve plate 334, wherein the two-way valve driving mechanism is composed of a two-way valve cylinder 313, a two-way valve swing rod 312, a two-way valve shaft 332 and a two-way valve swing arm 333, a fixed end of the two-way valve cylinder 313 is fixedly connected with the reversing valve body 320 through a two-way valve cylinder support 315, an extending end of the two-way valve cylinder 313 is connected with one end of the two-way valve swing rod 312, the other end of the two-way valve swing rod 312 is connected with the two-way valve shaft 332 through a key, one end of the two-way valve; under the drive of the two-way valve oil cylinder 313, the two-way valve swing rod 312 drives the two-way valve plate 334 to rotate around the axis of the two-way valve shaft 332 through the two-way valve shaft 332 and the two-way valve swing arm 333; as shown in fig. 9, two sides of the bidirectional valve plate 334 are respectively provided with a second sealing ring 324 and a third sealing ring 325, a second sealing port 323 and a third sealing port 326 are respectively arranged in the reversing valve body 320 inside the waste gas outlet 314 and inside the combustion air inlet 311, and the second sealing ring 324 and the third sealing ring 325 are matched with the second sealing port 323 and the third sealing port 326 on the corresponding sides to seal the corresponding interface on the reversing valve body 320; the second sealing port 323 and the third sealing port 326 are both made of heat-resistant stainless steel.
As shown in fig. 7 and 8, the check valve mechanism comprises a check valve driving mechanism and a check valve plate 328, wherein the check valve driving mechanism comprises a check valve cylinder 319, a check valve swing rod 318, a check valve shaft 317 and a check valve swing arm 327, a fixed end of the check valve cylinder 319 is fixedly connected with the reversing valve body 320 through a check valve cylinder support 321, an extending end of the check valve cylinder 319 is connected with one end of the check valve swing rod 327, the other end of the check valve swing rod 327 is connected with the check valve shaft 317 through a key, one end of the check valve swing arm 327 is fixedly connected with the check valve shaft 317, and the other end is connected with the check valve plate 328; under the drive of the one-way valve oil cylinder 319, the one-way valve swing rod 318 drives the one-way valve plate 328 to rotate around the axis of the one-way valve shaft 317 through the one-way valve shaft 317 and the one-way valve swing arm 327; a reversing valve blanking chute 329 is arranged at the position of the reversing valve feeding hole 316, and the reversing valve blanking chute 329 extends a certain distance into the reversing valve body 320; as shown in fig. 10, a second seal ring seat 331 is arranged outside the reversing valve blanking chute 329 of the extension section, a fourth seal ring 330 is arranged in the second seal ring seat 331, and the lower edge of the fourth seal ring 330 is higher than the lower edge of the reversing valve blanking chute 329; one side of the one-way valve plate 328, which faces the feed port 316 of the reversing valve, is provided with a fourth sealing port, which is of a bowl-shaped structure, the bowl port is made of stainless steel, and the inner diameter of the bowl port is larger than the outer diameter of the blanking chute 329 of the reversing valve; the feed port 316 of the reversing valve is sealed by the fourth sealing port and the fourth sealing ring 330.
The working process of the closed type rapid charging system for the double-chamber shaft kiln comprises the following steps: first, a raw material (e.g., limestone) is charged into the bi-directional material-dividing storage 1 by means of a single-bucket elevator or a bucket elevator. The bidirectional material distributing storage bin 1 is arranged to realize the purpose of feeding two kiln chambers through a feeding system. In the middle storage and feeding seal valve 2, the upper seal valve 21 is responsible for sealing the seal valve feed inlet 211, the discharge direction of the bidirectional material distribution storage bin 1 is controlled, the materials are fed into the corresponding lower storage bin 22 through the upper seal valve 21, and the lower storage bin 22 can store 2-3 times of feeding amount of the elevator and then is discharged into the kiln once, so that the feeding time is shortened. The gas-material shared reversing valve 3 at the lower part is provided with 4 interfaces which are a reversing valve feeding hole 316, a reversing valve discharging hole 322, a combustion-supporting air inlet 311 and a waste gas outlet 314 respectively. The two-way valve mechanism is responsible for switching on and off of a combustion air inlet 311 and a waste gas outlet 314, namely the combustion air inlet 311 is opened when the kiln chamber is heated, the waste gas outlet 314 is closed, airflow flows downwards, and the interior of the kiln chamber is in positive pressure; when the kiln chamber is used for heat accumulation, the waste gas outlet 314 is opened, the combustion-supporting air inlet 311 is closed, the airflow flows upwards, and the inside of the kiln chamber is in negative pressure. When charging into the kiln is required, the upper sealing valve 21 in the storage charging sealing valve 2 must be in a closed state, and the check valve plate 328 in the gas-material shared reversing valve 3 is in an open state, so that the material in the lower storage bin 22 is charged into the kiln. During charging, the upper sealing valve 21 in the storage charging sealing valve 2 is in a closed state, so that the pressure in the kiln chamber is positive, and the gas in the kiln cannot leak to the operating environment.
The upper sealing valve 21 in the storage feed sealing valve 2, when closed, serves both to block the flow of material from leaking down and to prevent gas from leaking out.
In the gas-material shared reversing valve 3, a reversing valve feed port 316 is used for material inflow and is also used as a gas flow channel, namely, the purpose of gas flow reversing is realized while feeding is finished by adopting a valve, and the gas reversing operation is realized by adopting a two-way valve mechanism.
In the closed type quick feeding device for the double-chamber shaft kiln, included angles between all the blanking channels and the horizontal plane are more than or equal to 45 degrees, so that materials are prevented from being stacked.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A closed rapid charging system for a double-hearth shaft kiln is characterized by comprising 1 bidirectional material distributing storage bin, 2 material storing and charging sealing valves and 2 gas-material sharing reversing valves; 2 kiln mouths of the double-chamber shaft kiln are respectively provided with a gas-material shared reversing valve, and the gas-material shared reversing valve consists of a reversing valve body, a two-way valve mechanism and a one-way valve mechanism; the reversing valve body is provided with a waste gas outlet, a combustion air inlet, a reversing valve feeding port and a reversing valve discharging port, wherein the reversing valve discharging port is hermetically connected with the corresponding kiln opening; the two-way valve plate of the two-way valve mechanism is used for respectively sealing and sealing the waste gas outlet or the combustion air inlet under different working states; the check valve plate of the check valve mechanism is used for sealing and sealing the feed port of the reversing valve; the material storage and feeding sealing valve consists of an upper sealing valve and a lower storage bin, the upper sealing valve is provided with a sealing valve feed port which is hermetically connected with a corresponding bin discharge port of the bidirectional material distribution storage bin, and a sealing valve plate of the upper sealing valve is used for sealing the sealing valve feed port; the upper sealing valve is provided with a sealing valve discharge hole which is butted with a storage bin feed inlet of the lower storage bin; the lower storage bin is provided with a storage bin discharge hole which is hermetically connected with a reversing valve feed inlet of a corresponding gas-material shared reversing valve.
2. The closed rapid charging system for the double-chamber shaft kiln as recited in claim 1, wherein the top of the two-way material-distributing storage bin is provided with a bin feed inlet, the bottom is symmetrically provided with 2 bin discharge outlets, and the included angle between the axis of the bin discharge outlet and the vertical center line of the bin is 45 degrees; the volume of the bidirectional material-distributing storage bin is larger than that of a hopper of the single-bucket elevator.
3. The closed rapid charging system for the dual-chamber shaft kiln as recited in claim 1, wherein the upper sealing valve comprises a sealing valve body, a sealing valve plate and a sealing valve plate driving mechanism, the upper part of the sealing valve body is provided with a sealing valve feed port, the sealing valve plate is arranged in the sealing valve body close to the sealing valve feed port, the sealing valve plate swings in the sealing valve body under the driving of the sealing valve plate driving mechanism, and the sealing valve feed port can be sealed and closed or opened; the bottom of the sealing valve body is provided with a sealing valve discharge hole which is butted with a storage bin feed inlet of a lower storage bin; the bottom of the lower storage bin is provided with a storage bin discharge hole which is hermetically connected with a reversing valve feed inlet of a gas-material shared reversing valve.
4. The closed rapid charging system for the double-chamber shaft kiln as claimed in claim 3, wherein the top of the valve body of the sealing valve is provided with an air pressure balance connection pipe, the air pressure balance connection pipe is respectively connected with the two-way material distribution storage bin through an air pressure balance pipeline I, the air pressure balance pipeline II is connected with a gas material common reversing valve, the air pressure balance pipeline I is provided with a first electromagnetic valve, and the air pressure balance pipeline II is provided with a second electromagnetic valve.
5. The closed rapid charging system for the dual-chamber shaft kiln as recited in claim 3, wherein the sealing valve plate driving mechanism is composed of a sealing valve cylinder, a sealing valve swing link, a sealing valve shaft and a sealing valve swing arm, the fixed end of the sealing valve cylinder is fixed on the valve casing outside the sealing valve body through a sealing valve cylinder support, the extending end of the sealing valve cylinder is connected with one end of the sealing valve swing link, the other end of the sealing valve swing link is in key connection with the sealing valve shaft, one end of the sealing valve swing arm is fixedly connected with the sealing valve shaft, and the other end is fixedly connected with the sealing valve plate; and under the drive of the sealing valve oil cylinder, the sealing valve swing rod drives the sealing valve shaft to rotate and enables the sealing valve plate to swing through the sealing valve swing arm.
6. The closed rapid charging system for the double-chamber shaft kiln as claimed in claim 3, wherein a sealing valve blanking chute is arranged at the sealing valve feeding port, a first sealing ring seat is arranged at the outer side of the sealing valve blanking pipe, and a first sealing ring is arranged in the first sealing ring seat; and a first sealing opening is formed in one side, facing the feeding opening of the sealing valve, of the sealing valve plate, and after the sealing valve plate swings in place, the first sealing opening is tightly pressed on the first sealing ring to seal the feeding opening of the sealing valve.
7. The closed rapid charging system for a dual-chamber shaft kiln as recited in claim 1, wherein said lower storage silo is detachably connected to an upper sealing valve; the volume of the lower storage bin is more than or equal to 4 times of the volume of the hopper of the single-hopper hoister.
8. The closed rapid charging system for the double-hearth shaft kiln as recited in claim 1, wherein one side of the top of the reversing valve body is provided with a waste gas outlet connected with an external waste gas pipeline, and the side wall of the reversing valve body close to the waste gas outlet is provided with a combustion air inlet connected with an external combustion air pipeline; one side of the reversing valve body opposite to the combustion air inlet is provided with an inclined reversing valve feeding hole which is hermetically connected with a storage bin discharging hole of a lower storage bin, and the included angle between the axis of the reversing valve feeding hole and the horizontal plane is more than 40 degrees; the bottom of the reversing valve body is provided with a reversing valve discharge port connected with a corresponding kiln opening; the two-way valve mechanism is arranged at one side close to the waste gas outlet and the combustion air inlet, a two-way valve plate in the two-way valve mechanism is positioned in the reversing valve body, the two-way valve plate is driven by the two-way valve driving mechanism to be switched among 2 working positions, the two-way valve plate can seal the waste gas outlet at one working position and seal the combustion air inlet at the other working position; the one-way valve mechanism is installed on one side close to the feed port of the reversing valve, a one-way valve plate in the one-way valve mechanism is located inside a valve body of the reversing valve and is driven by the one-way valve driving mechanism to switch among 2 working positions, the one-way valve plate can seal the feed port of the reversing valve in one of the working positions, and an included angle between the one-way valve plate and the feed port of the reversing valve in the other working position is larger than 40 degrees.
9. The closed rapid charging system for the double-chamber shaft kiln according to claim 7, characterized in that the two-way valve mechanism is composed of a two-way valve driving mechanism and a two-way valve plate, wherein the two-way valve driving mechanism is composed of a two-way valve cylinder, a two-way valve swing rod, a two-way valve shaft and a two-way valve swing arm, the fixed end of the two-way valve cylinder is fixedly connected with the reversing valve body through a two-way valve cylinder support, the extending end of the two-way valve cylinder is connected with one end of the two-way valve swing rod, the other end of the two-way valve swing rod is connected with the two-way valve shaft through a key, one end of the two-way valve; under the drive of the two-way valve oil cylinder, the two-way valve swing rod drives the two-way valve plate to rotate around the axis of the two-way valve shaft through the two-way valve shaft and the two-way valve swing arm; a second sealing ring and a third sealing ring are respectively arranged on two sides of the bidirectional valve plate, a second sealing port and a third sealing port are respectively arranged in the reversing valve body on the inner side of the waste gas outlet and the inner side of the combustion air inlet, and the second sealing ring and the third sealing ring are matched with the second sealing port and the third sealing port on the corresponding side to realize the sealing of the corresponding interface on the reversing valve body; the second sealing port and the third sealing port are both made of heat-resistant stainless steel materials.
10. The closed rapid charging system for the double-hearth shaft kiln as recited in claim 1, wherein the check valve mechanism is composed of a check valve driving mechanism and a check valve plate, wherein the check valve driving mechanism is composed of a check valve cylinder, a check valve swing link, a check valve shaft and a check valve swing arm, the fixed end of the check valve cylinder is fixedly connected with the reversing valve body through a check valve cylinder support, the extending end of the check valve cylinder is connected with one end of the check valve swing link, the other end of the check valve swing link is connected with the check valve shaft through a key, one end of the check valve swing link is fixedly connected with the check valve shaft, and the other end is connected with the check valve plate; under the drive of the one-way valve oil cylinder, the one-way valve swing rod drives the one-way valve plate to rotate around the axis of the one-way valve shaft through the one-way valve shaft and the one-way valve swing arm; a reversing valve feeding chute is arranged at the reversing valve feeding port, and extends a certain distance into the reversing valve body; a second sealing ring seat is arranged on the outer side of the reversing valve blanking chute of the extension section, a fourth sealing ring is arranged in the second sealing ring seat, and the lower edge of the fourth sealing ring is higher than that of the reversing valve blanking chute; one side of the one-way valve plate, which faces the feed inlet of the reversing valve, is provided with a fourth sealing opening, the fourth sealing opening is of a bowl-shaped structure, the bowl opening is made of stainless steel, and the inner diameter of the bowl opening is larger than the outer diameter of a discharge chute of the reversing valve; the sealing of the feed port of the reversing valve is realized through the matching of the sealing port four and the sealing ring four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974100.7A CN110671925A (en) | 2019-10-14 | 2019-10-14 | Closed quick feeding system for double-chamber shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910974100.7A CN110671925A (en) | 2019-10-14 | 2019-10-14 | Closed quick feeding system for double-chamber shaft kiln |
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| Publication Number | Publication Date |
|---|---|
| CN110671925A true CN110671925A (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910974100.7A Pending CN110671925A (en) | 2019-10-14 | 2019-10-14 | Closed quick feeding system for double-chamber shaft kiln |
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| Country | Link |
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| CN (1) | CN110671925A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351363A (en) * | 2020-03-09 | 2020-06-30 | 北京嘉永会通能源科技有限公司 | Conveying device for furnace feeding system |
| CN113959234A (en) * | 2021-09-30 | 2022-01-21 | 广西柳州钢铁集团有限公司 | Method for judging air leakage of combustion-supporting reversing valve of double-hearth kiln |
-
2019
- 2019-10-14 CN CN201910974100.7A patent/CN110671925A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111351363A (en) * | 2020-03-09 | 2020-06-30 | 北京嘉永会通能源科技有限公司 | Conveying device for furnace feeding system |
| CN113959234A (en) * | 2021-09-30 | 2022-01-21 | 广西柳州钢铁集团有限公司 | Method for judging air leakage of combustion-supporting reversing valve of double-hearth kiln |
| CN113959234B (en) * | 2021-09-30 | 2023-09-29 | 广西柳州钢铁集团有限公司 | Method for judging air leakage of combustion-supporting reversing valve of double-chamber kiln |
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