A dust treatment system for raw coal transportation

Abstract

The present disclosure relates to a dust treatment system for raw coal transportation, including a coal transportation raw material bin, a dust collector, a mixer, a pulping trough and a waste pulp pool, wherein the mixer is connected to the dust collector through a first discharge pipe, and the dust in the dust collector is configured to be transported to the mixer through the first discharge pipe for mixing; the pulping trough is connected to the mixer through a second discharge pipe, and the dust mixed by the mixer is configured to be transported to the pulping trough through the second discharge pipe; a water inlet pipe for supplying water to the pulping trough is provided on the pulping trough, and the pulping trough is configured to mix dust with water to form slurry; the waste pulp pool is constructed to be connected to the pulping trough, and the slurry formed by the pulping trough is configured to be transported to the coal transportation raw material bin through the waste pulp pool for circulation. The dust treatment system for raw coal transportation provided by the present disclosure can effectively reduce the dust concentration in the transportation process and protect the health of the workers.

Description

Technical Field

[0001] The present disclosure relates to the field of chemical technology, and more specifically, to a dust handling system for raw coal transportation. Background Art

[0002] A large amount of water evaporates when the raw coal is dried, and the evaporated water needs air or flue gas as a carrier to be discharged from the system. After the raw coal is dried by the dryer, a large amount of dust will be generated when it is discharged to the conveying equipment. Direct discharge of a mixture of steam, dust, air, etc. will cause environmental pollution and affect the health of workers. Therefore, dust removal is required before discharge into the atmosphere to prevent air pollution.

[0003] The dust collected by the existing exhaust dust collector and the raw coal at the dryer outlet are transported to pulverized coal gasification through multiple non-closed belts. A large amount of dust is generated during the transportation process, and the dust around the conveyor belt is relatively large, which seriously exceeds the occupational health and safety standards and also increases the operational safety risks. Utility Model Content

[0004] In view of this, an embodiment of the present disclosure provides a dust treatment system for raw coal transportation to solve the technical defects existing in the prior art.

[0005] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0006] The present disclosure provides a dust treatment system for raw coal transportation, comprising:

[0007] A coal conveying raw material bin, wherein the coal conveying raw material bin is configured to temporarily store raw coal;

[0008] A dust collector configured to collect dust from the raw coal when it is supplied;

[0009] A mixer, the mixer is connected to the dust collector through a first discharge pipe, and the dust in the dust collector is configured to be transported to the mixer through the first discharge pipe for mixing;

[0010] A pulping trough, the pulping trough is connected to the mixer through a second discharge pipe, and the dust mixed by the mixer is configured to be transported to the pulping trough through the second discharge pipe; a water inlet pipe for supplying water to the pulping trough is provided on the pulping trough, and the pulping trough is configured to mix the dust with water to form slurry;

[0011] A waste pulp pool is constructed to be connected to the pulping tank, and the pulp formed in the pulping tank is configured to be transported to the coal conveying raw material bin through the waste pulp pool for circulation.

[0012] In one embodiment of the present disclosure, the waste slurry pool includes a water-coal slurry waste slurry pool and a pulverized coal sludge pool. The slurry is first transported from the water-coal slurry waste slurry pool to the coal conveying raw material bin for circulation. When the slurry reaches the target liquid level line of the water-coal slurry waste slurry pool, the slurry is then transported from the pulverized coal gasification sludge pool to the coal conveying raw material bin for circulation.

[0013] In one embodiment of the present disclosure, a back-flush device is provided on the top of the dust collector, and the back-flush device is configured to remove particulate matter from the inner wall of the dust collector.

[0014] In one embodiment of the present disclosure, a water replenishment flow meter is provided on the water inlet pipe, and the water replenishment flow meter is configured to monitor the water supply flow.

[0015] In one embodiment of the present disclosure, the pulping tank is provided with a liquid level display meter, and the liquid level display meter is configured to detect the liquid level height in the pulping tank.

[0016] In one embodiment of the present disclosure, the dust handling system for raw coal transportation further includes:

[0017] A coal feeder is provided between the coal conveying raw material bin and the dust collector, the raw coal enters the coal feeder from the coal conveying raw material bin, and the coal feeder is configured to adjust the supply amount of the raw coal.

[0018] In one embodiment of the present disclosure, the dust handling system for raw coal transportation further includes:

[0019] A dryer is provided between the coal feeder and the dust collector, and is configured to dry the raw coal. After the raw coal enters the dryer from the coal feeder for drying, it enters the belt conveyor.

[0020] In one embodiment of the present disclosure, the dust handling system for raw coal transportation further includes:

[0021] A washing tower is connected to the dust collector through a third discharge pipe, and the exhaust gas in the dust collector is configured to be transported to the washing tower through the third discharge pipe for washing.

[0022] In one embodiment of the present disclosure, an induced draft fan is further provided between the dust collector and the washing tower, and the induced draft fan is configured to transport the exhaust gas from the dust collector to the washing tower.

[0023] In one embodiment of the present disclosure, a discharge valve is further provided on the first pipeline, and the discharge valve is configured to control the conveyance of the dust.

[0024] The dust treatment system for raw coal transportation provided by the present disclosure can effectively reduce the dust concentration in the transportation process and protect the health of workers.

[0025] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a dust treatment system for raw coal transportation provided by an embodiment of the present disclosure;

[0027] Figure 2 It is a structural schematic diagram of another dust handling system for raw coal transportation provided by an embodiment of the present disclosure.

[0028] Reference numerals

[0029] 1- coal conveying raw material bin; 2- dust collector; 3- mixer; 4- first discharge pipe; 5- pulping tank; 6- second discharge pipe; 7- water inlet pipe; 8- waste slurry pool; 81- water-coal slurry waste slurry pool; 82- pulverized coal sediment pool; 9- backflush device; 10- water replenishment flow meter; 11- liquid level display meter; 12- coal feeder; 13- dryer; 14- washing tower; 141- first washing tower; 142- second washing tower; 15- third discharge pipe; 16- induced draft fan; 17- discharge valve; 18- buffer bin; 19- carrier gas heater; 20- carrier gas heater induced draft fan; 21- air cooler; 22- vacuum pump; 23- agitator; 24- circulating water pump. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] The specific embodiments of the present disclosure are described below in conjunction with the accompanying drawings.

[0035] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0036] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0037] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0038] The present invention provides a dust treatment system for raw coal transportation, comprising a coal transportation raw material bin, a dust collector, a mixer, a pulping trough and a waste pulp pool, wherein the coal transportation raw material bin is constructed for temporarily storing raw coal; the dust collector is configured to collect dust of the raw coal during supply; the mixer is connected with the dust collector through a first discharge pipe, and the dust in the dust collector is configured to be transported to the mixer through the first discharge pipe for mixing; the pulping trough is connected with the mixer through a second discharge pipe, and the dust mixed by the mixer is configured to be transported to the pulping trough through the second discharge pipe; a water inlet pipe for supplying water to the pulping trough is provided on the pulping trough, and the pulping trough is configured to mix dust with water to form slurry; the waste pulp pool is constructed to be connected with the pulping trough, and the slurry formed in the pulping trough is configured to be transported to the coal transportation raw material bin through the waste pulp pool for circulation.

[0039] The dust treatment system for raw coal transportation provided by the present disclosure can effectively reduce the dust concentration in the transportation process and protect the health of workers.

[0040] For ease of understanding, refer to Figure 1 to Figure 2 , the specific structure and working principle of the dust handling system for raw coal transportation disclosed in the present invention are explained in detail in combination with an embodiment.

[0041] like Figure 1 As shown, the dust treatment system for raw coal transportation provided in this embodiment includes a coal conveying raw material bin 1, a dust collector 2, a mixer 3, a pulping tank 5 and a waste pulp pool 8. Among them, the coal conveying raw material bin 1 is configured to temporarily store raw coal. Since a large amount of dust will be generated during the transportation of raw coal, the dust collector 2 is configured to collect dust from the raw coal during supply. The mixer 3 is connected to the dust collector 2 through a first discharge pipe 4, and the dust in the dust collector 2 is configured to be transported to the mixer 3 through the first discharge pipe 4 for mixing. In this embodiment, the mixer 3 is a high-speed spiral mixer 3, and the mixer 3 is a sealed structure to avoid the problem of dust.

[0042] like Figure 1 to Figure 2As shown, in order to prevent the dust from causing harm to the health of the workers, the collected dust needs to be processed, so a pulping tank 5 needs to be set. The pulping tank 5 is connected to the mixer 3 through the second discharge pipe 6, and the dust mixed by the mixer 3 is configured to be transported to the pulping tank 5 through the second discharge pipe 6. The pulping tank 5 is provided with a water inlet pipe 7 for supplying water to the pulping tank 5, and the pulping tank 5 is configured to mix the dust with water to form a slurry. A pulping tank 5 agitator 23 is provided above the pulping tank 5, and the dust and water are uniformly mixed by stirring with the agitator 23 to form a slurry.

[0043] like Figure 2 As shown, in order to ensure that the entire system can operate stably and safely, in one embodiment of the present disclosure, the dust treatment system for raw coal transportation further includes a coal feeder 12 and a dryer 13, wherein the coal feeder 12 is arranged between the coal conveying raw material bin 1 and the dust collector 2, and the raw coal enters the coal feeder 12 from the coal conveying raw material bin 1, and the coal feeder 12 is configured to adjust the supply amount of the raw coal. The dryer 13 is arranged between the coal feeder 12 and the dust collector 2, and the dryer 13 is configured to dry the raw coal, and after the raw coal enters the dryer 13 from the coal feeder 12 for drying, the raw coal enters the belt conveyor, and the dust enters the dust collector 2.

[0044] Specifically, the raw coal first enters the buffer bin 18 from the coal conveying raw material bin 1 for falling buffering, and then enters the coal feeder 12 through the buffer bin 18. The coal feeder 12 can adjust the frequency according to the operation status of the entire system, and then adjust the supply amount of the raw coal.

[0045] Considering that the collected dust may also carry a small amount of raw coal, a waste pulp pool 8 is provided to save resources. The waste pulp pool 8 is configured to be connected to the pulping tank 5, and the pulp formed in the pulping tank 5 is configured to be transported to the coal conveying raw material bin 1 through the waste pulp pool 8 for circulation.

[0046] like Figure 2 As shown, in one embodiment of the present disclosure, the waste slurry pool 8 includes a water-coal slurry waste slurry pool 81 and a pulverized coal sludge pool 82. The slurry is first transported from the water-coal slurry waste slurry pool 81 to the coal conveying raw material bin 1 for circulation. When the slurry reaches the target liquid level line of the water-coal slurry waste slurry pool 81, the slurry is then transported from the pulverized coal gasification sludge pool to the coal conveying raw material bin 1 for circulation.

[0047] Specifically, the slurry coming out of the slurry tank 5 will first enter the water-coal slurry waste slurry pool 81, and then be transported to the coal conveying raw material bin 1 via the water-coal slurry waste slurry pool 81. In this embodiment, a maximum liquid level line can be set as the target liquid level line. When the slurry flow rate is large and reaches the maximum liquid level line of the water-coal slurry waste slurry pool 81, the slurry will enter the pulverized coal gasification sediment pool, and then be transported to the coal conveying raw material bin 1 via the pulverized coal gasification sediment pool for slurry recycling. By setting up two waste slurry pools 8, the smooth operation of the entire system can be guaranteed even when the slurry processing volume is large, and the slurry in the waste slurry pool 8 will enter the coal conveying raw material bin 1 for recycling, saving resources and costs.

[0048] In this embodiment, the dust collector 2 is a bag dust collector 2. When the filter bag in the bag dust collector 2 collects dust, some dust particles will adhere to the inner wall of the filter bag. Therefore, it is necessary to clean the dust particles attached to the filter bag regularly. Figure 2 As shown, in one embodiment of the present disclosure, a back-blowing device 9 is provided on the top of the dust collector 2 , and the back-blowing device 9 is configured to remove particulate matter from the inner wall of the dust collector 2 .

[0049] Specifically, a pressure display is provided on the dust collector 2. When the pressure difference is large, it means that there are more dust particles attached to the inner wall of the dust collector 2. When the pressure difference is small, there are fewer dust particles attached to the inner wall of the dust collector 2. In addition, the back-blowing device 9 in this embodiment can work at a certain frequency and frequency. When the pressure difference is large, the back-blowing frequency can be increased and the frequency can be increased. When the pressure difference is small, the back-blowing frequency can be reduced and the frequency can be reduced. The back-blowing gas needs to select a stable gas. The back-blowing gas in this embodiment is nitrogen. Nitrogen enters the dust collector 2 from the top of the dust collector 2 through the back-blowing device 9, and shakes the dust particles on the inner wall of the dust collector 2 to the bottom of the dust collector 2.

[0050] In order to better control the ratio of dust to water during pulping, Figure 2 As shown, in one embodiment of the present disclosure, a water supply flow meter 10 is provided on the water inlet pipe 7, and the water supply flow meter 10 is configured to monitor the water supply flow. The pulping tank 5 is provided with a liquid level display meter 11, and the liquid level display meter 11 is configured to detect the liquid level height in the pulping tank 5. The provision of the water supply flow meter 10 and the liquid level display meter 11 can effectively control the coal slurry liquid level height and coal slurry concentration.

[0051] like Figure 2As shown, in one embodiment of the present disclosure, the dust treatment system for raw coal transportation further includes a washing tower 14, which is connected to the dust collector 2 through a third discharge pipe 15, and the tail gas in the dust collector 2 is configured to be transported to the washing tower 14 through the third discharge pipe 15 for washing. An induced draft fan 16 is also provided between the dust collector 2 and the washing tower 14, and the induced draft fan 16 is configured to transport the tail gas from the dust collector 2 to the washing tower 14.

[0052] Specifically, the dry tail gas in the dust collector 2 enters the induced draft fan 16 from the third discharge pipe 15, and the induced draft fan 16 serves as a power source to transport the dry tail gas to the washing tower 14 for washing. In this embodiment, the washing tower 14 includes a first washing tower 141 and a second washing tower 142. The tops of the first washing tower 141 and the second washing tower 142 are both provided with a spray water pipeline, and a circulating water pump 24 is also provided between the first washing tower 141 and the second washing tower 142. The dry tail gas in the dust collector 2 first enters the first washing tower 141 for washing, and then is pumped into the second washing tower 142 for secondary washing by the circulating water pump 24. The dry tail gas after washing is cooled by the air cooler 21, and then discharged by the vacuum pump 22.

[0053] Since the entire system needs to operate under negative pressure, Figure 2 As shown, in one embodiment of the present disclosure, the dry tail gas coming out of the scrubber 14 is divided into two paths to ensure that the entire system can be operated in a negative pressure state. As mentioned above, one path is cooled by the air cooler 21 and emptied by the vacuum pump 22, and the other path is transported to the carrier gas heater 19 for heating via the carrier gas heater induced draft fan 20. The carrier gas heater 19 can heat the dry tail gas to 120°C, and then transport the heated dry tail gas to the dryer 13 to provide heat for the dryer 13, thereby realizing the recycling of the dry tail gas, saving resources and costs, and at the same time ensuring the temperature of the raw coal at the outlet of the dryer, reducing the operating risk.

[0054] like Figure 2 As shown, in order to better control the transportation of dust, a discharge valve 17 is also provided on the first pipeline, and the discharge valve 17 is configured to control the transportation of dust. In this embodiment, the discharge valve 17 is a rotary discharge valve 17, and the rotary discharge valve 17 is also a sealing device, so as to prevent dust leakage during the transportation process and cause harm to the workers.

[0055] The dust treatment system for raw coal transportation provided by the present disclosure can effectively control the liquid level and coal slurry concentration, effectively reduce the dust concentration in the transportation process, protect the health of workers, and at the same time ensure the raw coal temperature at the dryer outlet, reducing the safety risk of operation.

[0056] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present disclosure is not limited by the described action sequence, because according to the present disclosure, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present disclosure.

[0057] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] The preferred embodiments of the present disclosure disclosed above are only used to help explain the present disclosure. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present disclosure. The present disclosure selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present disclosure, so that those skilled in the art can well understand and use the present disclosure. The present disclosure is limited only by the claims and their full scope and equivalents.

Claims

1. A dust treatment system for raw coal transportation, characterized in that: include: A coal conveying raw material bin (1), wherein the coal conveying raw material bin (1) is configured to temporarily store raw coal; A dust collector (2), the dust collector (2) being configured to collect dust from the raw coal when it is supplied; A mixer (3), the mixer (3) being connected to the dust collector (2) via a first discharge pipe (4), and the dust in the dust collector (2) being transported to the mixer (3) via the first discharge pipe (4) for mixing; A pulping trough (5), wherein the pulping trough (5) is connected to the mixer (3) via a second discharge pipe (6), and the dust mixed by the mixer (3) is configured to be transported to the pulping trough (5) via the second discharge pipe (6); a water inlet pipe (7) for supplying water to the pulping trough (5) is provided on the pulping trough (5), and the pulping trough (5) is configured to mix the dust with water to form a slurry; A waste pulp pool (8), wherein the waste pulp pool (8) is configured to be in communication with the pulping tank (5), and the pulp formed in the pulping tank (5) is configured to be transported to the coal conveying raw material bin (1) through the waste pulp pool (8) for circulation.

2. The dust handling system for raw coal transportation according to claim 1, characterized in that: The waste slurry pool (8) comprises a water-coal slurry waste slurry pool (81) and a pulverized coal sludge pool (82). The slurry is first transported from the water-coal slurry waste slurry pool (81) to the coal conveying raw material bin (1) for circulation. When the slurry reaches the target liquid level line of the water-coal slurry waste slurry pool (81), the slurry is then transported from the pulverized coal sludge pool to the coal conveying raw material bin (1) for circulation.

3. The dust handling system for raw coal transportation according to claim 1, characterized in that: A back-blowing device (9) is provided at the top of the dust collector (2), and the back-blowing device (9) is configured to remove particulate matter from the inner wall of the dust collector (2).

4. The dust handling system for raw coal transportation according to claim 1, characterized in that: The water inlet pipe (7) is provided with a water replenishment flow meter (10), and the water replenishment flow meter (10) is configured to monitor the water supply flow rate.

5. The dust handling system for raw coal transportation according to claim 1, characterized in that: The pulping tank (5) is provided with a liquid level display meter (11), and the liquid level display meter (11) is configured to detect the liquid level height in the pulping tank (5).

6. The dust handling system for raw coal transportation according to claim 1, characterized in that: Also includes: A coal feeder (12), wherein the coal feeder (12) is arranged between the coal conveying raw material bin (1) and the dust collector (2), the raw coal enters the coal feeder (12) from the coal conveying raw material bin (1), and the coal feeder (12) is configured to adjust the supply amount of the raw coal.

7. The dust handling system for raw coal transportation according to claim 6, characterized in that: Also includes: A dryer (13), the dryer (13) is arranged between the coal feeder (12) and the dust collector (2), the dryer (13) is configured to dry raw coal, and the raw coal enters the dryer (13) from the coal feeder (12) for drying and then enters the belt conveyor.

8. The dust handling system for raw coal transportation according to claim 1, characterized in that: Also includes: A washing tower (14), wherein the washing tower (14) is connected to the dust collector (2) via a third discharge pipe (15), and the tail gas in the dust collector (2) is configured to be transported to the washing tower (14) via the third discharge pipe (15) for washing.

9. The dust handling system for raw coal transportation according to claim 8, characterized in that: An induced draft fan (16) is also provided between the dust collector (2) and the washing tower (14), and the induced draft fan (16) is configured to transport exhaust gas from the dust collector (2) to the washing tower (14).

10. The dust handling system for raw coal transportation according to claim 1, characterized in that: A discharge valve (17) is also provided on the first discharge pipe, and the discharge valve (17) is configured to control the conveyance of the dust.

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