Multi-biomass replacement fuel feeding system for cement production

Abstract

This invention relates to a multi-biomass alternative fuel feeding system for cement production, comprising a negative pressure separator. The air inlet of the negative pressure separator is connected to a bag packaging unit, the air outlet of the negative pressure separator is connected to a Roots vacuum pump, the bottom outlet of the negative pressure separator is connected to a storage silo, the top of the storage silo is equipped with a level gauge, the conical part of the storage silo is connected to the Roots vacuum pump, a pneumatic gate valve is connected directly below the bottom outlet of the storage silo, a metering scale is connected directly below the pneumatic gate valve, a buffer silo is connected below the outlet of the metering scale, a belt conveyor is connected to the top of the buffer silo, an inverted conical feed silo and an iron separator are connected to the tail of the belt conveyor, a through-type belt scale is installed in the middle of the belt of the belt conveyor, and a pneumatic conveying device is connected to the bottom of the buffer silo. This invention can simultaneously process multiple types, different forms, and different entry methods of biomass alternative fuels. It has a compact structure, low investment, integrates storage, metering, and conveying, eliminates the need for bag breaking, is environmentally friendly, allows for rapid switching, provides stable multi-point feeding, and reduces energy consumption.

Description

Technical Field

[0001] This invention relates to the field of alternative fuel technology for cement kiln disposal, and more specifically, to a multi-biomass alternative fuel feeding system for cement production. Background Technology

[0002] With the promulgation of GB16780-2021, the critical threshold of 117 kgce / t for the comprehensive energy consumption per unit product of clinker has forced cement plants to use biomass as a substitute fuel. However, biomass fuels are diverse, with different material forms and transportation methods, resulting in the need for many feeding systems, complex plant layouts, and large investments. At the same time, there are also many technical problems such as environmental protection, material blockage, and instability. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-biomass alternative fuel feeding system for cement production, which can simultaneously process multiple types, different forms and different entry methods of biomass alternative fuels.

[0004] The technical solution adopted by this invention to solve its technical problem is as follows: A multi-biomass alternative fuel feeding system for cement production is constructed, including a negative pressure separator. The air inlet of the negative pressure separator is connected to a bag packaging unit. The air outlet of the negative pressure separator is connected to a Roots vacuum pump. The bottom outlet of the negative pressure separator is connected to a storage silo. A level gauge is installed at the top of the storage silo. The conical part of the storage silo is connected to the Roots vacuum pump. A pneumatic gate valve is connected directly below the bottom outlet of the storage silo. A weighing scale is connected directly below the pneumatic gate valve. A buffer silo is connected below the outlet of the weighing scale. A belt conveyor is connected to the top of the buffer silo. An inverted conical feed silo and an iron remover are connected to the tail end of the belt conveyor. A through-type belt scale is installed in the middle of the belt of the belt conveyor. A pneumatic conveying device is connected to the bottom of the buffer silo. The pneumatic conveying device is divided into four paths and connected to both sides of the conical part of the decomposition furnace and both sides of the lower middle part of the decomposition furnace cylinder.

[0005] According to the above scheme, the pneumatic conveying device includes a rotary valve, a Roots blower, and a three-way valve. The rotary valve is connected to the bottom of the buffer chamber, the Roots blower is connected to the rotary valve, and the rotary valve is also connected to the decomposition furnace through the three-way valve.

[0006] According to the above scheme, the air inlet hose of the negative pressure separator is equipped with a steel wire filter screen at the front end.

[0007] According to the above scheme, the measurement is called a shaftless double-helix meter.

[0008] According to the above scheme, the rotary valve is provided with an air extraction port on its side and an ejector at its bottom.

[0009] According to the above scheme, the top of the storage chamber, the top of the buffer chamber, and the air extraction port of the rotary valve are connected to the negative pressure separator through pipelines.

[0010] According to the above scheme, the Roots vacuum pump is interlocked with the level gauge.

[0011] According to the above scheme, the cone-shaped part of the storage compartment is equipped with an activation device.

[0012] The multi-biomass alternative fuel feeding system for cement production according to the present invention has the following beneficial effects:

[0013] 1. In this invention, biomass fuel can be delivered in various ways, including storage bins and belt conveyors. Bagged biomass fuel is stored via negative pressure conveying, while light fuels and large materials are delivered in bulk, crushed, and then conveyed via belt. This system can adapt to the vast majority of biomass fuels.

[0014] 2. This invention achieves bag-free conveying through negative pressure, improving efficiency and avoiding workers working in harsh conditions. At the same time, the inlet is equipped with a screen to filter impurities such as iron wire, large particles, and large strips of cloth, preventing blockages in the silo, screw conveyor, and pipelines, and preventing fluctuations in the kiln.

[0015] 3. In this invention, materials such as blocky, flocculent, sticky, and bulk materials that have been crushed upon arrival do not pass through storage silos but are directly conveyed into the kiln by belt conveyor after iron removal and metering, thereby reducing intermediate steps that could lead to material blockage and affect kiln fluctuations.

[0016] 4. In this invention, the storage bin, buffer bin, and rotary valve are equipped with return air pipes connected to the negative pressure separator to ensure smooth material flow. At the same time, the pneumatic conveying pipeline is equipped with an electric three-way valve, which can quickly switch the kiln entry position according to the properties of the material.

[0017] In summary, the multi-biomass alternative fuel feeding system for cement production of this invention can simultaneously process multiple types, different forms, and different entry methods of biomass alternative fuels. It has a compact structure, low investment, integrates storage, metering, and transportation, eliminates the need for bag breaking, is environmentally friendly, allows for rapid switching, provides stable multi-point feeding, and reduces energy consumption. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the structure of the multi-biomass alternative fuel feeding system for cement production of the present invention;

[0020] In the diagram: 1-Bag packaging; 2-Filter screen; 3-Negative pressure separator; 4-Roots vacuum pump; 5-Storage silo; 6-Level gauge; 7-Pneumatic gate valve; 8-Measuring scale; 9-Feed silo; 10-Belt conveyor; 11-Iron separator; 12-Pass-through belt scale; 13-Buffer silo; 14-Rotary valve; 15-Roots blower; 16-Three-way valve. Detailed Implementation

[0021] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1 As shown, the cement production multi-biomass alternative fuel feeding system of the present invention includes a negative pressure separator 3, a Roots vacuum pump 4, a storage silo 5, a level gauge 6, a pneumatic gate valve 7, a weighing scale 8, a feed silo 9, a belt conveyor 10, an iron remover 11, a through-type belt scale 12, and a buffer silo 13.

[0023] The negative pressure separator 3 has hoses at the inlet and outlet, a bag 1 inserted at the air inlet, and a Roots vacuum pump 4 connected to the air outlet. The storage bin 5 is connected directly below the bottom outlet of the negative pressure separator 3. A level gauge 6 is installed at the top of the storage bin 5. The cone is connected to the Roots vacuum pump 4 through a pipe. A pneumatic gate valve 7 is connected directly below the bottom outlet. A weighing scale 8 is connected directly below the pneumatic gate valve 7. A buffer bin 13 is connected below the outlet of the weighing scale 8. At the same time, a belt conveyor 10 is connected to the top of the buffer bin 13. The inverted cone-shaped feed bin 9 and the iron remover 11 are connected to the tail of the belt conveyor 10. A through belt scale 12 is installed in the middle of the belt. A pneumatic conveying device is connected to the bottom of the buffer bin 13. The pneumatic conveying device includes a rotary valve 14, a Roots blower 15, and a three-way valve 16. The pneumatic conveying device can be divided into four paths and connected to both sides of the cone of the decomposition furnace and both sides of the lower middle part of the decomposition furnace cylinder.

[0024] In this embodiment, preferably, negative pressure conveying is suitable for powdery, granular, and bagged incoming materials (such as carbon black, rice husks, corn cobs, tire granules, etc.); belt conveying is suitable for blocky, flocculent, sticky, and bulk incoming materials that have undergone crushing (wood chips, wood chips, shredded cloth, etc.).

[0025] In this embodiment, preferably, the front end of the air inlet hose of the negative pressure separator 3 is provided with a steel wire filter screen 1, which can filter powdery material impurities (such as iron wire, large particles, large strips of cloth, etc.) and prevent blockage of the silo 5, screw conveyor 8 and pipelines.

[0026] In this embodiment, preferably, the Roots vacuum pump 4 motor is driven by a variable frequency drive.

[0027] In this embodiment, preferably, the weighing scale 8 is a shaftless double-helix weighing scale, and the motor adopts frequency conversion drive.

[0028] In this embodiment, preferably, the rotary valve 14 adopts an anti-jamming, large-diameter (φ1200mm) design, has an air extraction port on the side, an ejector at the bottom, and the motor is driven by a variable frequency drive.

[0029] In this embodiment, preferably, the top of the storage bin 5, the top of the buffer bin 13, and the air extraction port of the rotary valve 14 are connected to the negative pressure separator 3 through pipelines to ensure that the system has a slight negative pressure and that the material is discharged normally.

[0030] In this embodiment, preferably, the Roots vacuum pump 4 is interlocked with the level gauge 6. When the storage bin 5 has a high level, the Roots vacuum pump 4 operates at a low speed to ensure the required air volume for the system's slight negative pressure. When the storage bin 5 has a high level, the Roots vacuum pump 4 operates at its normal design speed.

[0031] In this embodiment, preferably, the cone portion of the storage chamber 5 is equipped with an activation device, which supplies gas through the outlet pipe of the Roots vacuum pump 4. During normal operation, the gas needs to be released.

[0032] In this embodiment, preferably, the Roots blower 15 motor is driven by a variable frequency drive, and the blower speed is freely controlled according to the material, so as to adopt a reasonable material-to-air ratio.

[0033] In this embodiment, preferably, the pneumatic conveying three-way valve 16 is an electric three-way valve, which can freely switch between entering the cone section of the decomposition furnace or the lower part of the decomposition furnace body according to the properties of the material. For example, powdery, small granular, and high-calorific-value materials enter the cone section of the decomposition furnace; large granular, blocky, and low-calorific-value materials enter the lower part of the decomposition furnace body.

[0034] In this invention, biomass fuel can enter the kiln in multiple ways. The system includes a storage bin 5 and a conveyor belt 10. Bagged biomass fuel is stored via negative pressure conveying, while lightweight fuels and large materials are transported via conveyor belt after being crushed in bulk. This system is adaptable to most biomass fuels. The negative pressure conveying eliminates the need to break bags, improving efficiency and preventing workers from working in harsh conditions. A screen 2 at the inlet filters impurities such as iron wire, large particles, and large strips of cloth, preventing blockages in the silo 5, screw conveyor 8, and pipelines, and avoiding disruptions to kiln operation. In this invention, lumpy, flocculent, sticky, and bulk materials, after crushing, are directly conveyed into the kiln via conveyor belt 10 (iron removal 11) and metering, without passing through the storage bin, reducing intermediate steps that could lead to blockages and disrupt kiln operation. The storage bin 5, buffer bin 13, and rotary valve 14 are connected to a negative pressure separator 3 via return air pipes to ensure smooth material flow. The pneumatic conveying pipeline is equipped with an electric three-way valve 16, allowing for rapid switching of the kiln entry position based on the material's properties. This multi-biomass alternative fuel feeding system for cement production can simultaneously process various types, forms, and entry methods of biomass alternative fuels. It features a compact structure, low investment, and integrates storage, metering, and transportation. It eliminates the need for bag breaking, is environmentally friendly, allows for rapid switching, provides stable multi-point feeding, and reduces energy consumption.

[0035] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-biomass substitute fuel feeding system for cement production, characterized in that, The system includes a negative pressure separator. The air inlet of the negative pressure separator is connected to the bag packaging. The air outlet of the negative pressure separator is connected to a Roots vacuum pump. The bottom outlet of the negative pressure separator is connected to a storage silo. A level gauge is installed at the top of the storage silo. The conical part of the storage silo is connected to the Roots vacuum pump. A pneumatic gate valve is connected directly below the bottom outlet of the storage silo. A weighing scale is connected directly below the pneumatic gate valve. A buffer silo is connected below the outlet of the weighing scale. One end of the top of the buffer silo is connected to a belt conveyor. The tail end of the belt conveyor is connected to an inverted conical feed silo and a magnetic separator. A through-type belt scale is installed in the middle of the belt of the belt conveyor. The bottom of the buffer silo... The unit is connected to a pneumatic conveying device, which is divided into four paths that connect to both sides of the cone section of the decomposition furnace and both sides of the lower middle section of the decomposition furnace cylinder. Different feeding points can be switched through a three-way valve according to the calorific value and particle size of the material. The pneumatic conveying device includes a rotary valve, a Roots blower, and a three-way valve. The rotary valve is connected to the bottom of the buffer silo, the Roots blower is connected to the rotary valve, and the rotary valve is also connected to the decomposition furnace through the three-way valve. The air inlet hose of the negative pressure separator is equipped with a steel wire filter screen at the front end. The top of the storage silo, the top of the buffer silo, and the air extraction port of the rotary valve are connected to the negative pressure separator through pipelines.

2. The multi-biomass alternative fuel feeding system for cement production according to claim 1, characterized in that, The measurement is called a shaftless double-helix meter.

3. The multi-biomass alternative fuel feeding system for cement production according to claim 1, characterized in that, The rotary valve has an air extraction port on its side and an ejector at its bottom.

4. The multi-biomass alternative fuel feeding system for cement production according to claim 1, characterized in that, The Roots vacuum pump is interlocked with the level gauge.

5. The multi-biomass alternative fuel feeding system for cement production according to claim 1, characterized in that, The cone-shaped part of the storage compartment is equipped with an activation device.

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