Sulfur and ash reduction centrifugal dehydrator

Abstract

The utility model discloses a sulfur and ash reduction centrifugal dehydrator, and relates to the technical field of coal processing equipment. The top end of the machine body is provided with a feed port, the middle lower end of the side wall of the machine body is connected with a discharge pipe, the bottom end of the machine body is connected with a drainage pipe and supporting legs, the centrifugal separation mechanism is located in the machine body and comprises a rotary drum located in the machine body, the inner wall of the rotary drum is provided with a spiral blade and a magnetic separation plate, and the bottom end of the rotary drum is connected with a driving mechanism and a spraying mechanism. The drum is arranged on the inner wall of the drum top. The magnetic separation plates are arranged, the annular magnetic separation plates distributed on the inner wall of the rotary drum at equal intervals are made of high-permeability materials, a high-intensity magnetic field can be generated, in the high-speed rotating process of the rotary drum, coal makes full contact with the magnetic separation plates, sulfur-containing substances such as magnetic pyrite are effectively adsorbed, the sulfur content in coal is greatly reduced, and the energy consumption is reduced. The coal quality is improved, and emission of harmful gases such as sulfur dioxide during coal combustion is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal processing equipment, specifically, it relates to a desulfurization and ash reduction centrifugal dewatering machine. Background Technology

[0002] Coal is an important energy resource in my country. However, the sulfur and ash contained in coal will produce a large number of pollutants, such as sulfur dioxide and other harmful gases, during the combustion process. This will not only cause serious environmental pollution, but also affect the combustion efficiency and quality of coal. Therefore, it is crucial to reduce the sulfur and ash content in coal during the post-mining processing.

[0003] While existing centrifugal dewatering machines can achieve a certain degree of solid-liquid separation when dewatering coal, their effect on removing sulfur and ash is not ideal. Some equipment has a complex structure and high operating and maintenance costs, while others have low separation efficiency and cannot meet the needs of large-scale coal processing.

[0004] In view of this, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a desulfurization and ash reduction centrifugal dewatering machine, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] A desulfurization and ash reduction centrifugal dewatering machine includes: a machine body with a feed inlet at the top, a discharge pipe connected to the lower middle part of the side wall of the machine body, a drain pipe and a support leg connected to the bottom end, a centrifugal separation mechanism located inside the machine body, including a rotating drum inside the machine body, the inner wall of the rotating drum being provided with spiral blades and magnetic separation plates, a drive mechanism connected to the bottom end of the rotating drum, and a spraying mechanism located on the inner wall of the top of the rotating drum, including a water spray pipe located on the inner wall of the top of the rotating drum, multiple nozzles evenly distributed at the bottom end of the water spray pipe, and a water inlet pipe connected to the top end of the water spray pipe.

[0008] Optionally, the discharge pipe passes through the side wall of the machine body and connects to the inside of the drum, and one end of the drain pipe is connected to the drum, while the other end passes through the bottom of the machine body and is located outside the machine body.

[0009] Optionally, the drive mechanism includes a second rotating shaft connected to the bottom end of the drum, a worm gear connected to the surface of the second rotating shaft, and a worm engaged with the worm gear.

[0010] Optionally, the drive mechanism further includes a first rotating shaft that passes through the side wall of the machine body. One end of the first rotating shaft located outside the machine body is connected to a motor, and the other end located inside the machine body is connected to a worm gear.

[0011] Optionally, the machine body is provided with a protective cover, and the first rotating shaft, the second rotating shaft, the worm gear and the worm are all located inside the protective cover.

[0012] Optionally, a feed pipe is connected to the feed inlet, the feed pipe passes through the top of the drum, and one end of the water inlet pipe is connected to a water spray pipe inside the drum through the feed pipe.

[0013] Optionally, the magnetic separation plates are ring-shaped and there are multiple magnetic separation plates, which are equidistantly distributed on the inner wall of the drum. The magnetic separation plates are made of a high magnetic permeability material.

[0014] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0015] 1. By setting up magnetic separation plates, multiple annular magnetic separation plates equidistantly distributed on the inner wall of the drum are made of high magnetic permeability material, which can generate a strong magnetic field. During the high-speed rotation of the drum, the coal is in full contact with the magnetic separation plates, and sulfur-containing substances such as magnetic pyrite are effectively adsorbed, which greatly reduces the sulfur content in the coal, improves the quality of the coal, and reduces the emission of harmful gases such as sulfur dioxide during coal combustion, which meets environmental protection requirements.

[0016] 2. By setting up a spraying mechanism, the annular water spray pipe located on the inner wall of the drum top and the evenly distributed nozzles can spray water onto the coal at a suitable angle and force. The water thoroughly washes the coal, causing the ash to gather and be discharged under the action of centrifugal force, which significantly reduces the ash content in the coal and improves the combustion efficiency and cleanliness of the coal.

[0017] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0018] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0019] In the picture:

[0020] Figure 1 This is a schematic diagram of the overall structure;

[0021] Figure 2 This is a schematic diagram of the cross-sectional structure of the organism;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the drum and protective cover;

[0023] Figure 4 This is a schematic diagram of the spraying mechanism.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Machine body; 2. Feed inlet; 3. Support leg; 4. Discharge pipe; 5. Motor; 6. First rotating shaft; 7. Water inlet pipe; 8. Rotary drum; 9. Drain pipe; 10. Protective cover; 11. Feed pipe; 12. Magnetic separation plate; 13. Spiral blade; 14. Water spray pipe; 15. Nozzle; 16. Worm gear; 17. Second rotating shaft; 18. Worm wheel.

[0026] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] In the early 20th century, coal was widely used as a primary energy source, but its high sulfur and ash content caused serious environmental and industrial problems. As industrial production increasingly demanded higher coal quality, the need for desulfurization and ash reduction technologies arose. Early centrifugal dewatering machines focused primarily on basic solid-liquid separation to remove moisture from coal. These early machines were simple in structure, mostly horizontal, consisting of a rotating drum with a screen and a drive unit. A motor drove the drum to rotate at high speed, using centrifugal force to remove moisture from the coal. However, this equipment was almost ineffective at removing sulfur and ash. Researchers at the time realized that to solve coal quality problems, desulfurization and ash reduction functions needed to be added to centrifugal dewatering. In the mid-20th century, some initial attempts at improvement emerged. Some researchers tried adding simple filtration devices to centrifugal dewatering machines to remove some ash particles through physical filtration, but the results were unsatisfactory. Meanwhile, no effective method for sulfur removal had been found, as sulfur exists in coal in complex forms, including both organic and inorganic sulfur.

[0029] With the continuous development of science and technology, centrifugal dewatering machines for desulfurization and ash reduction achieved technological breakthroughs in the mid-to-late 20th century. In materials science, new filter and magnetic materials were developed, providing possibilities for improving desulfurization and ash reduction technologies. In ash reduction, researchers began to adopt more efficient filtration technologies; they added multiple layers of fine filter screens to the centrifugal dewatering machine drum. These screens could classify and filter ash particles according to their size, greatly improving the ash removal rate. Simultaneously, by optimizing the drum design, the residence time of coal within the drum was increased, allowing more opportunities for ash to be intercepted by the filter screen. For desulfurization technology, magnetic separation methods gradually became a research hotspot; scientists discovered that some pyrite in coal... Sulfur is magnetic and can be separated by magnetic separation. Researchers began installing magnetic separators inside the drums of centrifugal dehydrators. Initially, these separators were simple, consisting of permanent magnets arranged on the inner wall of the drum, but they were sufficient to remove sulfur to some extent. With advancements in magnetic separation technology, electromagnetic separators were introduced. By adjusting the current, the magnetic field strength could be controlled, further improving sulfur separation efficiency. Furthermore, significant improvements were made to the drive mechanism and structural design. Motor performance improved, providing more stable and higher speeds, resulting in greater centrifugal force and better dehydration. Simultaneously, the overall structure of the equipment became more compact, reducing its footprint and facilitating installation and use in industrial production.

[0030] Entering the 21st century, with the growing popularity of intelligent and environmentally friendly concepts, desulfurization and ash reduction centrifugal dewatering machines are developing towards intelligent and environmentally friendly directions. In terms of intelligence, advanced sensors and control systems are being applied to centrifugal dewatering machines. Sensors can monitor the equipment's operating status in real time, such as the drum's rotational speed, temperature, and pressure, as well as parameters like the coal's moisture content, sulfur content, and ash content. The control system automatically adjusts the equipment's operating parameters based on the sensor feedback data, such as motor speed, magnetic field strength of the magnetic separator, and spray water flow rate, to achieve optimal desulfurization, ash reduction, and dewatering effects. Simultaneously, the intelligent system can also achieve remote monitoring and fault diagnosis, facilitating management and maintenance by operators. In terms of environmental protection, desulfurization and ash reduction centrifugal dewatering machines... The centrifugal dewatering machine places greater emphasis on the recycling of water resources and the reduction of pollutants. On the one hand, the equipment is equipped with an advanced water circulation system that treats and purifies the discharged wastewater before reusing it for spraying to reduce ash, greatly reducing water consumption. On the other hand, by optimizing magnetic separation and filtration technologies, the removal rate of sulfur and ash is further improved, reducing pollutant emissions during coal combustion. In addition, modern desulfurization and ash reduction centrifugal dewatering machines are more user-friendly in design and easier to operate. For example, the use of a touch screen operating interface allows operators to intuitively understand the equipment's operating status and parameter settings, reducing operational difficulty. At the same time, equipment maintenance is also more convenient, with some key components adopting a modular design for easy replacement and repair.

[0031] Looking ahead, desulfurization and ash reduction centrifugal dewatering machines are expected to achieve further development in terms of higher precision separation technology, more intelligent control systems, and more environmentally friendly designs, providing stronger support for the sustainable development of the coal industry.

[0032] Please see Figure 1-4 As shown, this embodiment provides a desulfurization and ash reduction centrifugal dewatering machine, including: a machine body 1, a feed inlet 2 at the top of the machine body 1, a discharge pipe 4 connected to the lower middle end of the side wall of the machine body 1, a drain pipe 9 and a support leg 3 connected to the bottom end, a centrifugal separation mechanism located inside the machine body 1, including a rotating drum 8 located inside the machine body 1, a spiral blade 13 and a magnetic separation plate 12 provided on the inner wall of the rotating drum 8, a drive mechanism connected to the bottom end of the rotating drum 8, and a spraying mechanism located on the top inner wall of the rotating drum 8, including a water spray pipe 14 located on the top inner wall of the rotating drum 8, a plurality of nozzles 15 evenly distributed at the bottom end of the water spray pipe 14, and a water inlet pipe 7 connected to the top end of the water spray pipe 14.

[0033] The feed inlet 2 at the top of the machine body 1 is the entrance for the coal to be processed into the equipment. Located at the top of the machine body 1, it facilitates connection with the coal conveying equipment above, allowing the coal to fall naturally into the equipment by gravity, ensuring smooth feeding. The discharge pipe 4 connected to the lower middle part of the side wall of the machine body 1 is used to discharge the coal after desulfurization, ash reduction, and dehydration treatment. It is located at the lower middle part, corresponding to the outlet position of the material conveyed by the spiral blades 13 inside the drum 8, facilitating the smooth discharge of the processed coal from the machine body 1 under the push of the spiral blades 13. The drain pipe 9 connected to the bottom of the machine body 1 mainly functions to discharge the wastewater generated during the desulfurization and ash reduction process, as well as the moisture in the coal and the ash and other impurities washed down. Under the action of centrifugal force, these impurities converge in the central area of ​​the drum 8. The coal is then discharged from the machine body 1 through the drain pipe 9. The drain pipe 9 is positioned at the bottom of the machine body 1, conforming to the characteristic of liquids flowing naturally downwards under gravity, which is beneficial for efficient drainage. The support legs 3 connected to the bottom of the machine body 1 support the entire equipment. The rotating drum 8, located inside the machine body 1, is the core component of the entire centrifugal separation process. Driven by the drive mechanism, it rotates at high speed, using centrifugal force to separate coal from moisture, sulfur, and ash. The interior of the rotating drum 8 provides sufficient space for the coal to undergo sufficient centrifugal motion. The spiral blades 13 on the inner wall of the rotating drum 8 rotate with the drum 8. Their main function is to guide the solid coal material thrown to the inner wall of the rotating drum 8 under centrifugal force along the spiral direction from the feed end of the rotating drum 8 to the discharge end. The end conveying system ensures continuous coal transport within the drum 8, guaranteeing the continuity of the processing and allowing the processed coal to be discharged promptly from the discharge pipe 4. The magnetic separation plate 12, also located on the inner wall of the drum 8, is a key component for sulfur reduction. Made of magnetic material, the magnetic separation plate 12 adsorbs sulfur-containing substances such as magnetic pyrite from the coal during the rotation of the drum 8, thereby reducing the sulfur content. Distributed along the inner wall of the drum 8, the magnetic separation plate 12 ensures sufficient contact with the coal during centrifugal motion, improving the adsorption efficiency of sulfur-containing substances. The water spray pipe 14, located on the top inner wall of the drum 8, is designed in a ring shape to evenly distribute water within the drum 8. The main function of the water spray pipe 14 is... Water from the inlet pipe 7 is sprayed onto the coal inside the rotating drum 8 through nozzles 15. Multiple nozzles 15 are evenly distributed at the bottom of the water spray pipe 14. The design and distribution of the nozzles 15 ensure that the sprayed water can cover the coal inside the rotating drum 8, thoroughly washing the coal. The nozzles 15 are tightly connected to the water spray pipe 14, and the spray direction is carefully designed so that the water can be sprayed onto the coal at a suitable angle and force, effectively washing away the ash in the coal. The water flows out from the drain pipe 9 under the action of centrifugal force, achieving the purpose of ash reduction. The inlet pipe 7 connected to the top of the water spray pipe 14 is responsible for introducing external water into the water spray pipe 14. The inlet pipe 7 can be connected to the water supply system to ensure that there is enough water supply to the spraying mechanism to meet the needs of continuous ash reduction.

[0034] In this embodiment, the discharge pipe 4 passes through the side wall of the machine body 1 and is connected to the inside of the drum 8. One end of the drain pipe 9 is connected to the drum 8, and the other end passes through the bottom of the machine body 1 and is located outside the machine body 1.

[0035] The discharge pipe 4 penetrates the side wall of the machine body 1 and connects to the inside of the drum 8, allowing the coal that has been conveyed to the discharge end of the drum 8 by the spiral blades 13 to be directly discharged from the machine body 1 through the discharge pipe 4. This ensures that the processed coal can be smoothly conveyed from the inside of the equipment to the outside, avoiding the accumulation of coal between the drum 8 and the machine body 1, ensuring continuous and stable operation of the equipment, and improving the efficiency of coal processing. During the centrifugal dewatering process, the moisture in the coal and the ash and other impurities washed down will converge towards the center of the drum 8 under the action of centrifugal force. The connection between the drain pipe 9 and the drum 8 can promptly draw out these converged liquids from the drum 8 and then discharge them from the equipment through the part penetrating the bottom of the machine body 1, effectively realizing the discharge of liquid after solid-liquid separation.

[0036] The drive mechanism includes a second rotating shaft 17 connected to the bottom end of the drum 8. A worm gear 18 is connected to the surface of the second rotating shaft 17. The worm gear 18 is meshed with a worm 16. The drive mechanism also includes a first rotating shaft 6 that passes through the side wall of the machine body 1. One end of the first rotating shaft 6 located outside the machine body 1 is connected to a motor 5, and the other end located inside the machine body 1 is connected to the worm 16.

[0037] In the drive mechanism, the second rotating shaft 17 is connected to the bottom end of the drum 8. When the second rotating shaft 17 rotates, it directly drives the drum 8 to rotate. The worm wheel 18 rotates synchronously with the second rotating shaft 17 to transmit and convert power. The worm wheel 18 is meshed with a worm 16. The worm 16 is connected to one end of the first rotating shaft 6, which passes through the side wall of the machine body 1 and is located inside the machine body 1. When the motor 5 drives the first rotating shaft 6 to rotate, the first rotating shaft 6 drives the worm 16 to rotate. The worm 16 then transmits power to the worm wheel 18 through meshing with it, thereby causing the second rotating shaft 17 and the drum 8 to rotate. The end of the first rotating shaft 6 located outside the machine body 1 is connected to the motor 5. The motor 5 serves as the power source for the entire drive mechanism, providing power for the operation of the equipment.

[0038] The machine body 1 is equipped with a protective cover 10. The first rotating shaft 6, the second rotating shaft 17, the worm gear 18 and the worm 16 are all located inside the protective cover 10. The function of the protective cover 10 is to protect these transmission components and prevent impurities such as coal and dust from entering the transmission system, affecting the transmission efficiency and the life of the components. At the same time, the protective cover 10 can also play a certain role in sound insulation and safety protection, reducing the noise of the equipment during operation and preventing operators from accidentally touching the transmission components and causing danger.

[0039] Feed pipe 11 is connected to feed inlet 2. Feed pipe 11 passes through the top of drum 8. One end of water inlet pipe 7 is connected to water spray pipe 14 inside drum 8 through feed pipe 11. The coal to be processed can directly enter the inside of drum 8 through feed pipe 11, ensuring smooth and accurate feeding. The diameter and length of feed pipe 11 are designed according to the processing capacity and feeding speed of the equipment to ensure that the coal can enter drum 8 evenly and stably. Water inlet pipe 7 introduces external water source into water spray pipe 14 inside drum 8, providing the necessary water source for spray ash reduction.

[0040] The magnetic separation plates 12 are ring-shaped and there are multiple plates. The multiple magnetic separation plates 12 are equidistantly distributed on the inner wall of the rotating drum 8. The magnetic separation plates 12 are made of high magnetic permeability material. The ring-shaped design allows the magnetic separation plates 12 to fully surround the coal, increasing the contact area with the coal. The equidistant distribution ensures that the coal can uniformly contact the magnetic separation plates 12 during the rotation of the rotating drum 8, improving the adsorption efficiency of magnetic sulfur-containing substances. The high magnetic permeability material can generate a strong magnetic field, which has a good adsorption effect on sulfur-containing substances such as magnetic pyrite in coal.

[0041] Working principle:

[0042] The coal to be processed enters the feed pipe 11 through the feed inlet 2 at the top of the machine body 1 from the coal conveying equipment above. The feed pipe 11 passes through the top of the drum 8, and the coal falls directly into the inside of the drum 8 along the feed pipe 11 by its own gravity.

[0043] The starter motor 5 drives the first rotating shaft 6 to rotate. One end of the first rotating shaft 6 is connected to the worm gear 16 inside the machine body 1. Therefore, when the first rotating shaft 6 rotates, it will drive the worm gear 16 to rotate synchronously. The worm gear 16 meshes with the worm wheel 18. Through this meshing transmission, the power is transmitted to the second rotating shaft 17 connected to the bottom of the drum 8, which in turn causes the drum 8 to rotate at high speed. The high-speed rotation of the drum 8 generates a strong centrifugal force. The coal is subjected to centrifugal force inside the drum 8. The solid coal material is thrown towards the inner wall of the drum 8, while the moisture and fine impurities in the coal gather towards the center area of ​​the drum 8. The spiral blades 13 on the inner wall of the drum 8 rotate together with the drum 8. Their function is to transport the solid coal material attached to the inner wall of the drum 8 from the feed end to the discharge end of the drum 8 along the spiral direction. The discharge pipe 4 passes through the side wall of the machine body 1 and connects to the inside of the drum 8. Under the push of the spiral blades 13, the processed coal is smoothly discharged from the machine body 1 through the discharge pipe 4.

[0044] During the rotation of the drum 8, sulfur-containing substances such as magnetic pyrite in the coal are adsorbed by the magnetic separation plate 12. The annular design ensures that the magnetic separation plate 12 fully surrounds the coal, and the equidistant distribution ensures that the coal can uniformly contact the magnetic separation plate 12 during centrifugal motion, thereby improving the adsorption efficiency of magnetic sulfur-containing substances and achieving desulfurization treatment of the coal. Multiple nozzles 15 evenly distributed at the bottom of the water spray pipe 14 spray water onto the coal inside the drum 8 at an appropriate angle and force. The design and distribution of the nozzles 15 ensure that the sprayed water can fully cover the coal, thoroughly washing it and washing away the ash in the coal. Under the action of centrifugal force, the water containing ash converges towards the center of the drum 8.

[0045] During the centrifugal dehydration process, the coal moisture and ash and other impurities that are washed down and gather in the central area of ​​the drum 8 are discharged through the drain pipe 9 connected to the drum 8 and then through the part of the discharge equipment that runs through the bottom of the machine body 1. The drain pipe 9 is set at the bottom of the machine body 1, which conforms to the characteristic of liquid flowing down naturally under the action of gravity, which is conducive to the efficient discharge of liquid after solid-liquid separation.

[0046] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A desulfurization and ash reduction centrifugal dewatering machine, characterized in that, include: The machine body (1) has a feed inlet (2) at the top, a discharge pipe (4) is connected to the lower middle part of the side wall of the machine body (1), and a drain pipe (9) and a support leg (3) are connected to the bottom. The centrifugal separation mechanism is located inside the machine body (1) and includes a rotating drum (8) located inside the machine body (1). The inner wall of the rotating drum (8) is provided with a spiral blade (13) and a magnetic separation plate (12). The bottom end of the rotating drum (8) is connected to a drive mechanism. The spraying mechanism is located on the inner wall of the top of the rotating drum (8), including a water spray pipe (14) located on the inner wall of the top of the rotating drum (8), with multiple nozzles (15) evenly distributed at the bottom end of the water spray pipe (14), and a water inlet pipe (7) connected to the top end of the water spray pipe (14).

2. The desulfurization and ash reduction centrifugal dewatering machine according to claim 1, characterized in that: The discharge pipe (4) passes through the side wall of the machine body (1) and is connected to the inside of the drum (8). One end of the drain pipe (9) is connected to the drum (8), and the other end passes through the bottom of the machine body (1) and is located outside the machine body (1).

3. The desulfurization and ash reduction centrifugal dewatering machine according to claim 1, characterized in that: The drive mechanism includes a second rotating shaft (17) connected to the bottom end of the drum (8), and a worm gear (18) is connected to the surface of the second rotating shaft (17), and the worm gear (18) is meshed with a worm (16).

4. A desulfurization and ash reduction centrifugal dewatering machine according to claim 3, characterized in that: The drive mechanism also includes a first rotating shaft (6) that passes through the side wall of the body (1). The first rotating shaft (6) is connected to a motor (5) at one end outside the body (1) and to a worm gear (16) at the other end inside the body (1).

5. A desulfurization and ash reduction centrifugal dewatering machine according to claim 4, characterized in that: The machine body (1) is provided with a protective cover (10), and the first rotating shaft (6), the second rotating shaft (17), the worm gear (18) and the worm (16) are all located inside the protective cover (10).

6. The desulfurization and ash reduction centrifugal dewatering machine according to claim 1, characterized in that: A feed pipe (11) is connected to the feed inlet (2). The feed pipe (11) passes through the top of the drum (8). One end of the water inlet pipe (7) is connected to the water spray pipe (14) inside the drum (8) through the feed pipe (11).

7. The desulfurization and ash reduction centrifugal dewatering machine according to claim 1, characterized in that: The magnetic separation plate (12) is ring-shaped and there are multiple magnetic separation plates (12) distributed at equal intervals on the inner wall of the drum (8). The magnetic separation plate (12) is made of a high magnetic permeability material.

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