A feeding and distributing conveying feeding system for alternative fuel of a cement kiln

Abstract

The utility model discloses a cement kiln is with the feeding and the distribution of alternative fuel's feeding system, it includes: first alternative fuel conveying system, it is used for conveying the alternative fuel of waste spinning kind, second alternative fuel conveying system, it is used for conveying the alternative fuel of domestic waste kind, distribution device, it is used for receiving the alternative fuel of first alternative fuel conveying system and second alternative fuel conveying system input, and can distribute the alternative fuel to two discharge ports at its bottom. The utility model system integrates the required equipment together, can utilize two different kinds of alternative fuel (domestic waste derived fuel, the alternative fuel of waste spinning kind) simultaneously, realizes respectively storage and metering, and according to the feeding demand, adjusts the proportioning flexibly, improves the combustion efficiency of fuel, is favorable to the stable operation and emission reduction target realization of cement kiln.

Description

Technical Field

[0001] This utility model specifically relates to the field of alternative fuel utilization technology for cement kilns, and specifically to a feeding and distributing system for alternative fuels used in cement kilns. Background Technology

[0002] With the increasing demands for energy conservation, emission reduction, and resource recycling in the cement industry, alternative fuels (such as fuel derived from municipal solid waste and fuel from general industrial solid waste) are being used more and more widely in cement kilns. However, existing alternative fuel feeding systems often suffer from problems such as inaccurate metering, uneven material distribution, poor airlock performance, and unstable feeding, which affect combustion efficiency and kiln stability.

[0003] Especially when multiple production lines share a single feeding system, the flexibility and precision of the material distribution device are crucial. Furthermore, when using different types of alternative fuels with significantly different characteristics (such as municipal solid waste-derived fuels and waste textile alternative fuels), the impact of materials on the cement kiln system can be reduced by separately metering and adjusting the proportions. Therefore, this invention proposes a feeding and distribution system for alternative fuels used in cement kilns to solve the above problems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a feeding and distributing system for alternative fuels in cement kilns, comprising:

[0005] The first alternative fuel delivery system is used to transport waste textile alternative fuels;

[0006] The second alternative fuel delivery system is used to transport alternative fuels for municipal solid waste.

[0007] The feeding device is used to receive alternative fuel input from the first alternative fuel conveying system and the second alternative fuel conveying system, and can distribute the alternative fuel to two discharge ports at its bottom.

[0008] There are two spiral auger devices, which are set up in parallel and the spiral directions of the two spiral auger devices are opposite.

[0009] The first pre-combustion furnace is used to burn and decompose alternative fuels delivered by a right-hand spiral auger device;

[0010] The second pre-combustion furnace is used to burn and decompose the alternative fuel delivered by the left-hand spiral auger device;

[0011] The spiral metering chamber is located below the right-hand spiral auger equipment and is connected by belt conveyor six. The spiral metering chamber is connected to the first pre-combustion furnace by a first airlock feeding system.

[0012] And a second quantitative feeder, which is located below the left-hand spiral auger equipment and is connected to the second pre-combustion furnace through the second airlock feeding system.

[0013] Optionally, a reamer is connected between the second airlock feeding system and the second quantitative feeder.

[0014] Optionally, the first pre-combustion furnace and the second pre-combustion furnace are respectively connected to an air compressor system one and an air compressor system two.

[0015] Optionally, the material distribution device is configured as a bin, and a rotating material feeding device is provided inside the bin. Above the material distribution device, belt conveyor five, belt conveyor four and belt conveyor three are arranged in sequence.

[0016] Optionally, the first alternative fuel delivery system includes:

[0017] Chain conveyor, on which waste textiles are fed as alternative fuel;

[0018] The step-feeding hopper is connected to the chain conveyor by belt conveyor one and belt conveyor two.

[0019] And a chain plate scale, which is located below the discharge port of the step feeder and is connected to the belt conveyor in three phases.

[0020] Optionally, the stepping feed hopper is equipped with three fabric cutters and feeding rollers. The three fabric cutters are installed side by side on the top of the stepping feed hopper. One end of each fabric cutter is fixed, and the height of the other end can be adjusted.

[0021] The three feeding rollers are installed at the discharge end of the stepping feed hopper and are staggered from bottom to top to control the uniformity of discharge and the height of the material layer.

[0022] Optionally, the second alternative fuel delivery system includes:

[0023] Plate-type feed hopper, which distributes material via a crane grab bucket;

[0024] A double-tube reamer is connected to the discharge port of a plate-type feed hopper;

[0025] And a quantitative feeder, which is connected between the double-tube reamer and the belt conveyor.

[0026] Optionally, the first airlock feeding system includes:

[0027] Airlock channel one, on which and along its input direction are arranged pneumatic gate valve two, rotary airlock valve two, pneumatic three-way material distribution valve and two pneumatic gate valves three;

[0028] And the third reamer, one end of which is connected to the first airlock channel, and the other end of which is connected to the charging port of the first pre-combustion furnace.

[0029] Optionally, the second airlock feeding system includes:

[0030] Airlock channel two, on which pneumatic gate valve one and rotary airlock valve one are sequentially arranged in sequence along its input direction;

[0031] The second reamer has one end connected to the second airlock channel and the other end connected to the opening of the tertiary air duct into the second pre-combustion furnace. The material enters the second pre-combustion furnace with the tertiary air.

[0032] And a high-temperature electric gate valve, which is connected between the second reamer and the second pre-combustion furnace.

[0033] Optionally, both the first and second airlock channels are connected to an automatic sprinkler system controlled by a temperature monitoring device;

[0034] The first pre-combustion furnace system is equipped with a temperature monitor, a combustion air regulating device, and a C4 raw material airlock and distribution device.

[0035] The second pre-combustion furnace system is equipped with a temperature monitor, a combustion air regulating device, and a C4 raw material airlock and distribution device.

[0036] This utility model adopts the above technology and has the following beneficial effects compared with the existing technology:

[0037] 1. This utility model system integrates the necessary equipment and can simultaneously utilize two different types of alternative fuels (domestic waste-derived fuel and waste textile alternative fuel), achieving separate storage and metering, and flexibly adjusting the ratio according to feeding requirements, thereby improving fuel combustion efficiency and contributing to the stable operation of cement kilns and the achievement of emission reduction targets.

[0038] 2. The utility model system is equipped with a material distribution device to realize the parallel operation of two lines, which can operate independently or simultaneously to meet the alternative fuel utilization needs of two cement kiln production lines.

[0039] 3. The airlock feeding system in the utility model effectively prevents hot gas backflow in the kiln system, ensuring operational safety. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of a feeding and distributing system for an alternative fuel used in a cement kiln.

[0041] Figure 2 for Figure 1 A schematic diagram of a medium-sized alternative fuel delivery system;

[0042] Figure 3 for Figure 1 Schematic diagram of the feeding system of the first pre-combustion furnace in China;

[0043] Figure 4 for Figure 1 Schematic diagram of the feeding system of the second pre-combustion furnace.

[0044] In the diagram: 1. Chain conveyor; 201. Belt conveyor one; 202. Belt conveyor two; 3. Stepping feeder bin; 301. Fabric reamer; 302. Feed roller; 4. Chain scale; 5. Plate feeder bin; 6. Double-tube reamer; 7. Quantitative feeder one; 801. Belt conveyor three; 802. Belt conveyor four; 803. Belt conveyor five; 9. Material distribution device; 10. Quantitative feeder two; 11. Reamer one; 12. Pneumatic gate valve one; 13. Rotary airlock valve one; 14. Reamer two; 15. High-temperature electric... 16. Gate valve; 17. Second pre-combustion furnace; 18. Combustion air regulating device II; 19. C4 raw material airlock distribution device II; 20. Belt conveyor VI; 21. Screw metering bin; 22. Pneumatic gate valve II; 23. Rotary airlock valve II; 24. Pneumatic three-way distribution valve; 25. Pneumatic gate valve III; 26. Reamer III; 27. First pre-combustion furnace; 28. Combustion air regulating device I; 29. ​​C4 raw material airlock distribution device I; 30. Air compressor system II; 31. Overhead crane grab bucket. Detailed Implementation

[0045] With reference to the accompanying drawings of the embodiments of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below.

[0046] Example: Please refer to the appendix Figure 1-4 This utility model provides a technical solution: a feeding and distributing system for alternative fuels in cement kilns, comprising:

[0047] The first alternative fuel delivery system is used to transport waste textile alternative fuels;

[0048] The second alternative fuel delivery system is used to transport alternative fuels for municipal solid waste.

[0049] The feeding device 9 is used to receive the alternative fuel input by the first alternative fuel conveying system and the second alternative fuel conveying system, and can distribute the alternative fuel to two discharge ports at its bottom.

[0050] There are two spiral auger devices, which are set up in parallel and the spiral directions of the two spiral auger devices are opposite.

[0051] The first pre-combustion furnace 26 is used to burn and decompose alternative fuels delivered by a right-hand spiral auger device;

[0052] The second pre-combustion furnace 16 is used to burn and decompose the alternative fuel delivered by the left-hand spiral auger device;

[0053] The spiral metering chamber 20 is located below the right-hand spiral auger equipment and is connected by belt conveyor 6 19. The spiral metering chamber 20 is connected to the first pre-combustion furnace 26 by a first airlock feeding system.

[0054] And a quantitative feeder 210, which is located below the left-hand spiral auger equipment and is connected to the second pre-combustion furnace 16 through the second airlock feeding system.

[0055] In this embodiment, a reamer 11 is connected between the second airlock feeding system and the second quantitative feeder 10.

[0056] In this embodiment, the first pre-combustion furnace 26 and the second pre-combustion furnace 16 are respectively connected to an air compressor system 30 and an air compressor system 29.

[0057] In this embodiment, the material distribution device 9 is set as a circular bin with a diameter of 3m and a height of 1.7m. A rotating material feeding device is installed inside the circular bin. Above the material distribution device 9, belt conveyors 803, 802, and 801 are arranged in sequence.

[0058] In this embodiment, the first alternative fuel delivery system includes:

[0059] Chain plate machine 1, on which waste textile alternative fuel is fed;

[0060] The stepping feed hopper 3 is connected to the chain conveyor 1 by belt conveyor 201 and belt conveyor 202.

[0061] And the chain plate scale 4, which is located below the discharge port of the stepping feed hopper 3 and connected to the belt conveyor 3 801.

[0062] In this embodiment, the stepping feed bin 3 is equipped with three fabric cutting tools 301 and a feeding roller 302. The three fabric cutting tools 301 are installed side by side on the top of the stepping feed bin 3. One end of each fabric cutting tool 301 is fixed, and the height of the other end can be adjusted.

[0063] Three feeding rollers 302 are installed at the discharge end of the stepping feed hopper 3, and are staggered from bottom to top to control the uniformity of discharge and the height of the material layer.

[0064] In this embodiment, the second alternative fuel delivery system includes:

[0065] The plate-type feeding bin 5 distributes material via a crane grab bucket 31;

[0066] The double-tube reamer 6 is connected to the discharge port of the plate feed hopper 5;

[0067] And a quantitative feeder 7, which is connected between the double-tube reamer 6 and the belt conveyor 801.

[0068] In this embodiment, the first airlock feeding system includes:

[0069] Airlock channel one, on which and along its input direction are arranged pneumatic gate valve two 21, rotary airlock valve two 22, pneumatic three-way material distribution valve 23 and two pneumatic gate valve three 24 in sequence;

[0070] And the reamer 25, one end of which is connected to the airlock channel 1, and the other end of which is connected to the charging port of the first pre-combustion furnace 26.

[0071] In this embodiment, the second airlock feeding system includes:

[0072] Airlock channel two, on which pneumatic gate valve 12 and rotary airlock valve 13 are sequentially arranged in sequence along its input direction;

[0073] The second reamer 14 has one end connected to the second airlock channel and the other end connected to the opening of the tertiary air duct into the second pre-combustion furnace 16. The material enters the second pre-combustion furnace 16 with the tertiary air.

[0074] And a high-temperature electric gate valve 15, which is connected between the second reamer 14 and the second pre-combustion furnace 16.

[0075] It should be added that during normal feeding, all gate valves are normally open, and airlock feeding is ensured by the spiral cutter and rotary airlock valve; in case of emergencies or maintenance, all gate valves are closed to prevent production risks such as backfire or positive pressure.

[0076] In this embodiment, both the first airlock channel and the second airlock channel are connected to an automatic sprinkler system controlled by a temperature monitoring device;

[0077] The pre-combustion furnace system of the first pre-combustion furnace 26 is equipped with a temperature monitor, a combustion air regulating device 27, and a C4 raw material airlock and material distribution device 28.

[0078] The pre-combustion furnace system of the second pre-combustion furnace 16 is equipped with a temperature monitor, a combustion air regulating device 17, and a C4 raw material airlock and distribution device 18 to ensure that the material is fully pre-combusted while controlling the temperature inside the furnace to prevent it from becoming too high.

[0079] It should be added that the opening of the C4 raw material airlock distribution device 128 and the C4 raw material airlock distribution device 218 is adjustable to adjust the amount of raw material powder entering the pre-combustion furnace.

[0080] In practical implementation, this utility model system includes two material feeding, storage, and conveying systems. One line is for alternative fuels such as waste textiles. The finished material is fed by a forklift to a chain conveyor. The outlet of the chain conveyor 1 is connected to the inlet of the tail of belt conveyor 201, and then conveyed by belt conveyor 202 to the top tail of the stepping feed hopper 3. When the material layer is low, the height is adjusted to distribute the material. The stepping feed hopper 3 conveys the material at the tail end to the outlet end by moving the floor. Three feeding rollers 302 set at the outlet end ensure uniform material discharge. The outlet of the stepping feed hopper 3 is connected to the inlet of the chain scale 4 to measure the discharge.

[0081] Another route is for the production of fuel derived from municipal solid waste. After pretreatment, the municipal solid waste is compressed and then fed into the plate feed hopper 5, where it is distributed by the overhead crane grab bucket. The discharge end of the plate feed hopper 5 is connected to the inlet of the double-tube cutter 6 and sent to the quantitative feeder 7 for metering. After the two materials are metered separately, they are sent to the belt conveyor 801, and then conveyed to the material distribution device 9 via the belt conveyor 802 and belt conveyor 803. When the rotating material distribution device is running, it sends the material in the hopper to the inlet of the two cutters, thereby realizing the material distribution function.

[0082] The material distribution device 9 is installed on the cantilever platform outside the kiln tail frame of line C. After the material is distributed, it is sent to the kiln tail frame of line A cement kiln via belt conveyor 19, and then sent to the first pre-combustion furnace 26 via the air lock channel. The material is sent to the first pre-combustion furnace 26 via the air lock channel 1 and the reamer 25 for pre-combustion, and finally enters the decomposition furnace of line A for complete combustion.

[0083] The other path after material distribution is sent to the C-line feeding channel. One of the discharge screws of the material distribution device 9 is connected to the inlet of the quantitative feeder 10. After metering, the material is sent to the second airlock channel and fed into the tertiary air duct of the second pre-combustion furnace 16. It enters the second pre-combustion furnace 16 with the tertiary air for pre-combustion and finally enters the C-line decomposition furnace for complete combustion.

[0084] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A feeding and distributing system for alternative fuels in cement kilns, characterized in that, It includes: The first alternative fuel delivery system is used to transport waste textile alternative fuels; The second alternative fuel delivery system is used to transport alternative fuels for municipal solid waste. The feeding device (9) is used to receive the alternative fuel input by the first alternative fuel conveying system and the second alternative fuel conveying system, and can distribute the alternative fuel to two discharge ports at its bottom. There are two spiral auger devices, which are set up in parallel and the spiral directions of the two spiral auger devices are opposite. The first pre-combustion furnace (26) is used to burn and decompose alternative fuels delivered by a right-hand spiral auger device; The second pre-combustion furnace (16) is used to burn and decompose alternative fuels delivered by a left-hand spiral auger device; The spiral metering bin (20) is located below the right-hand spiral auger equipment and is connected by belt conveyor six (19). The spiral metering bin (20) is connected to the first pre-combustion furnace (26) by a first airlock feeding system. And a second quantitative feeder (10), which is located below the left-hand spiral auger and is connected to the second pre-combustion furnace (16) through the second airlock feeding system.

2. The feeding and distributing system for alternative fuel in a cement kiln according to claim 1, characterized in that: A reamer (11) is connected between the second airlock feeding system and the second quantitative feeder (10).

3. The feeding and distributing system for alternative fuel in a cement kiln according to claim 1, characterized in that: The first pre-combustion furnace (26) and the second pre-combustion furnace (16) are respectively connected to air compressor system one (30) and air compressor system two (29).

4. The feeding and distributing system for alternative fuel in a cement kiln according to claim 1, characterized in that: The material distribution device (9) is configured as a circular bin, and a rotating material feeding device is provided inside the circular bin. Above the material distribution device (9) are belt conveyors five (803), four (802) and three (801) in sequence.

5. The feeding and distributing system for alternative fuel in a cement kiln according to claim 4, characterized in that: The first alternative fuel delivery system includes: Chain plate machine (1), on which waste textile alternative fuel is fed; The step-feeding hopper (3) is connected to the chain conveyor (1) by belt conveyor one (201) and belt conveyor two (202). And a chain plate scale (4), which is located below the discharge port of the step feeder (3) and connected to the belt conveyor (801).

6. The feeding and distributing system for alternative fuel in a cement kiln according to claim 5, characterized in that: The stepping feed bin (3) is equipped with three fabric cutters (301) and a feeding roller (302). The three fabric cutters (301) are installed side by side on the top of the stepping feed bin (3). One end of each fabric cutter (301) is fixed, and the height of the other end can be adjusted. The three feed rollers (302) are installed at the discharge end of the step feed hopper (3) and are staggered from bottom to top to control the uniformity of discharge and the height of the material layer.

7. The feeding and distributing system for alternative fuel in a cement kiln according to claim 4, characterized in that: The second alternative fuel delivery system includes: Plate-type feed bin (5), which distributes material through a crane grab bucket (31); A double-tube reamer (6) is connected to the discharge port of a plate-type feed hopper (5); And a quantitative feeder (7), which is connected between a double-tube reamer (6) and a belt conveyor (801).

8. The feeding and distributing system for alternative fuel in a cement kiln according to claim 1, characterized in that: The first airlock feeding system includes: Airlock channel one, on which and along its input direction are arranged pneumatic gate valve two (21), rotary airlock valve two (22), pneumatic three-way material distribution valve (23) and two pneumatic gate valve three (24). And the third reamer (25), one end of which is connected to the first airlock channel and the other end of which is connected to the injection port of the first pre-combustion furnace (26).

9. The feeding and distributing system for alternative fuel in a cement kiln according to claim 8, characterized in that: The second airlock feeding system includes: Airlock channel 2, on which pneumatic gate valve 1 (12) and rotary airlock valve 1 (13) are arranged in sequence along its input direction. The second reamer (14) has one end connected to the second airlock channel and the other end connected to the opening of the tertiary air duct into the second pre-combustion furnace (16). The material enters the second pre-combustion furnace (16) with the tertiary air. And a high-temperature electric gate valve (15), which is connected between the second reamer (14) and the second pre-combustion furnace (16).

10. A feeding and distributing system for alternative fuel in a cement kiln according to claim 9, characterized in that: Both the first and second airlock channels are connected to an automatic sprinkler system controlled by temperature monitoring equipment; The first pre-combustion furnace (26) is equipped with a temperature monitor, a combustion air regulating device (27), and a C4 raw material airlock and distribution device (28) in its pre-combustion furnace system. The second pre-combustion furnace (16) is equipped with a temperature monitor, a combustion air regulating device (17), and a C4 raw material airlock and distribution device (18).

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