Modular coal slurry drying system

Abstract

The utility model discloses a module formula coal slime drying system relates to coal slime drying and resource recycling technical field, and it is including: the ball press equipment, module formula coal slime drying box and screw feeder that connect gradually, the ball press equipment is responsible for the coal slime and is pressed into small ball, the module formula coal slime drying box inside is provided with drying structure, is used for small ball drying, the screw feeder one side realizes the conveyance of small ball after drying, the rotation of blade and the collision of free falling small ball, make coal slime break up and scatter. The utility model can utilize the wastewater, waste gas of power plant as drying heat source, through the modularization design, make coal slime in a space range, multiple reversal, through the extension coal slime moving path, guarantee the time of coal slime in module and stay, to reach the purpose of coal slime drying.

Description

Technical Field

[0001] This utility model relates to the field of coal slime drying and resource recycling technology, specifically to a modular coal slime drying system. Background Technology

[0002] The statements in this section are provided only as background information in connection with this disclosure and may not constitute prior art.

[0003] Raw coal is the primary fuel for thermal power plants, and its price directly impacts the economic viability of these projects. Many power plants are integrated coal-power projects, located near mines and coal washing plants. The coal used in these plants is primarily middlings coal, which, despite being middlings, remains relatively expensive, ranging from 600 to 1000 yuan per ton depending on market supply and demand. Coal slime, a byproduct of coal washing, occupies significant amounts of land, violating national land use policies. However, coal slime retains a certain calorific value, especially after drying, which significantly increases its calorific value. It can be used as a co-fired fuel in power plants. Coal slime is extremely inexpensive; some mines give it away for free to dispose of it, while others sell it for 50-250 yuan per ton.

[0004] If power plants can dry the coal slime produced by coal washing plants to reduce its moisture content and replace part of the raw coal, the price difference between coal slime and raw coal can significantly increase the power plant's profits. Power plants typically use tubular dryers, drum dryers, and disc dryers to dry coal slime. These types of equipment are all customized, mostly using steam as a heat source, resulting in complex systems and high energy consumption. This invention aims to explore a new coal slime drying technology that enables the drying equipment to be portable, interchangeable, has a low failure rate, and a simple system. Utility Model Content

[0005] The purpose of this invention is to provide a modular coal slime drying system that addresses the problems existing in the prior art. This system utilizes wastewater and exhaust gas from power plants as a drying heat source. Through modular design, the coal slime is redirected multiple times within a spatial range. By extending the movement path of the coal slime, the residence time of the coal slime in the module is ensured, thereby achieving the purpose of coal slime drying.

[0006] The technical solution of this utility model is as follows:

[0007] A modular coal slime drying system includes: a briquetting device, a modular coal slime drying box, and a screw feeder connected in sequence; the briquetting device is responsible for pressing the coal slime into small balls; the modular coal slime drying box is equipped with a drying structure for drying the small balls; the screw feeder conveys the dried small balls on one hand, and on the other hand, the rotation of the blades collides with the freely falling small balls, causing the coal slime to break up and disperse.

[0008] Furthermore, a hopper is provided at the upper inlet of the briquetting device for pouring in the collected coal slime.

[0009] Furthermore, the modular coal slime drying box has a coal slime drying box inlet at the top and a dry coal slime discharge outlet at the bottom; a scraper conveyor is provided at the discharge outlet below the briquetting device to transport the small balls to the coal slime drying box inlet; and a screw feeder is provided at the dry coal slime discharge outlet.

[0010] Furthermore, a scraper feeder is installed at the inlet of the coal slime drying box.

[0011] Furthermore, the drying structure includes: multiple sets of W-shaped hollow plates, each hollow plate having a drying channel, and a heat source passing through the hollow plate; the small ball slowly rolls along the direction of the drying channel, and when it reaches the end point of a hollow plate, it naturally falls to the lower hollow plate.

[0012] Furthermore, the hollow panels are arranged at an angle of 2°.

[0013] Furthermore, a water vapor outlet is provided on the side of the modular coal slime drying box near the top.

[0014] Furthermore, the water vapor outlet is equipped with N sets of exhaust fans, which on the one hand draw out the moisture precipitated from the dried coal slime, and on the other hand increase air disturbance to accelerate the drying process.

[0015] Furthermore, the water vapor outlet is equipped with three sets of exhaust fans.

[0016] Furthermore, the modular coal slime drying box is also equipped with a vibration device on the outside, which is controlled by a program and used to clean up the coal slime dust that falls off during the drying process.

[0017] Compared with existing technologies, the beneficial effects of this utility model are:

[0018] 1. A modular coal slime drying system, comprising a briquetting device, a modular coal slime drying chamber, and a screw feeder connected in sequence; the briquetting device is responsible for pressing coal slime into small balls; the modular coal slime drying chamber has a drying structure inside for drying the small balls; the screw feeder, on the one hand, transports the dried small balls, and on the other hand, the rotation of the blades collides with the freely falling small balls, causing the coal slime to break up and disperse. It utilizes wastewater and exhaust gas from power plants as a drying heat source, and through modular design, the coal slime is redirected multiple times within a spatial range. By extending the movement path of the coal slime, the residence time of the coal slime in the module is ensured, thereby achieving the purpose of coal slime drying.

[0019] 2. The modular coal slime drying box proposed in this utility model has an external size controlled within the size of a shipping container, which facilitates transportation and eliminates the need for large-item transportation costs and road and bridge reinforcement costs.

[0020] 3. This utility model makes the drying equipment into a module, which is simple to install, requires little maintenance, and is interchangeable. Attached Figure Description

[0021] Figure 1 A schematic diagram of a modular coal slime drying system;

[0022] Figure 2 This is a structural schematic diagram of a modular coal slime drying system from another perspective.

[0023] Attached reference numerals: 1-Bulking equipment, 2-Modular coal slime drying box, 3-Screw feeder, 4-Hopper, 5-Coal slime drying box inlet, 6-Dry coal slime discharge outlet, 7-Scraper conveyor, 8-Scraper cloth feeder, 9-Hollow plate, 10-Drying channel, 11-Water vapor outlet, 12-Manifold, 13-Heat source outlet, 14-Heat source inlet. Detailed Implementation

[0024] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0026] Example 1

[0027] Please see Figure 1 and Figure 2 A modular coal slime drying system, comprising:

[0028] The briquetting equipment 1, the modular coal slime drying box 2, and the screw feeder 3 are connected in sequence.

[0029] The briquetting device 1 is responsible for pressing coal slime into small balls; the modular coal slime drying box 2 is equipped with a drying structure for drying the small balls; the screw feeder 3 conveys the dried small balls on one hand, and on the other hand, the rotation of the blades collides with the freely falling small balls, causing the coal slime to break up and disperse.

[0030] In this embodiment, it should be noted that the outlet of the screw feeder 3 can be connected to various conveying equipment to transport materials to a distant location, or a collection hopper 4 can be installed for centralized collection. This embodiment does not limit the specific connection method, and any connection method is within the scope of protection of this application.

[0031] In this embodiment, specifically, a hopper 4 is provided at the upper inlet of the briquetting device 1 for pouring in the collected coal slime;

[0032] During use, coal slurry can be loaded into hopper 4 via grab bucket or loader. Below hopper 4 is the existing briquetting equipment 1 on the market, which presses all the coal slurry into small balls of the same diameter.

[0033] In this embodiment, specifically, the modular coal slime drying box 2 is provided with a coal slime drying box inlet 5 above and a dry coal slime discharge outlet 6 below; a scraper conveyor 7 is provided at the discharge port below the briquetting device 1 to transport small balls to the coal slime drying box inlet 5; and the screw feeder 3 is provided at the dry coal slime discharge outlet 6.

[0034] In this embodiment, specifically, a scraper feeder 8 is provided at the inlet 5 of the coal slime drying box.

[0035] In this embodiment, specifically, the drying structure includes: multiple sets of W-shaped hollow plates 9, each hollow plate 9 having a drying channel 10, and a heat source being introduced into the hollow plate 9; the small ball slowly rolls along the direction of the drying channel 10, and when it reaches the end point of a hollow plate 9, it naturally falls to the lower hollow plate 9;

[0036] It should be noted that by passing a heat source through the hollow plate 9, the surface temperature of the plate can reach 60-80℃, thereby drying the small balls above the hollow plate 9.

[0037] In this embodiment, it should be noted that the heat source in the hollow plate 9 comes from the wastewater and exhaust gas of the power plant. That is, the system utilizes the power plant's wastewater and exhaust gas as a drying heat source. Through modular design, the coal slime is redirected multiple times within a single space. By extending the movement path of the coal slime, the residence time of the coal slime in the module is ensured, thereby achieving the purpose of coal slime drying. It should also be noted that the hollow plates 9 are connected by branch pipes, ensuring that all hollow plates 9 are filled with gas or liquid, thus maintaining a constant temperature in the hollow plates 9.

[0038] In this embodiment, it should be noted that the heat source can be connected to the branch pipe through the header 12 and thus enter the hollow plate 9. The header 12 is provided with a heat source outlet 13 and a heat source inlet 14 at both ends to ensure the normal flow of the heat source.

[0039] In this embodiment, specifically, the hollow plate 9 is arranged at a 2° angle. It should be noted that due to the slope, the ball can slide downwards in the drying channel 10 under the action of gravity without the need for additional force. At the same time, the 2° angle is an angle with good performance obtained by the applicant after extensive testing. On the one hand, it can ensure that the ball can slide downwards in the drying channel 10 under the action of gravity without clogging. On the other hand, it greatly extends the time the ball spends in the drying channel 10, achieving thorough drying.

[0040] In this embodiment, specifically, a water vapor outlet 11 is provided on the side of the modular coal slime drying box 2 near the top.

[0041] In this embodiment, specifically, the water vapor outlet 11 is equipped with 3 sets of exhaust fans, which on the one hand draw out the moisture precipitated from the dried coal slime, and on the other hand increase the air disturbance to accelerate the drying process.

[0042] In this embodiment, specifically, a vibration device is also provided on the outside of the modular coal slime drying box 2, which is controlled by a program and used to clean the coal slime dust that peels off during the drying process.

[0043] For example, after each batch of material is dried, it is vibrated for 3 minutes to clean up the coal slime dust that has been peeled off during the drying process, so as to keep the flow channel clean and facilitate secondary feeding and drying.

[0044] In this embodiment, it should be noted that the modular coal slime drying box 2 is a modular design, with each module occupying 2.4m × 13m × 3m, which is comparable in size to a 45-foot high cube container, facilitating transportation and avoiding any issues with existing roads or bridges being unable to pass through. The modular coal slime drying box 2 is also reusable and interchangeable.

[0045] Example 2

[0046] Example 2, based on the modular coal slime drying system proposed in Example 1, also proposes a modular coal slime drying method, which specifically includes the following steps:

[0047] Step S1: First, the coal slime is loaded into hopper 4 using a grab bucket or loader. Below hopper 4 is a briquetting device 1 available on the market, which presses all the coal slime into small balls of the same diameter.

[0048] Step S2: The small ball enters the modular coal slime drying box 2 through the scraper conveyor 7 and flows along the drying channel 10 inside the modular coal slime drying box 2; when it reaches the end of a hollow plate 9, it falls naturally to the lower hollow plate 9 until it reaches the dry coal slime discharge port 6.

[0049] Step S3: The dried balls enter the screw feeder 3 through the dry coal slime discharge port 6. On the one hand, the material is conveyed, and on the other hand, the rotation of the blades collides with the freely falling balls, causing the coal slime to be broken and dispersed.

[0050] In this embodiment, it should be noted that the vibration device can also be controlled by a program; after each batch of material is dried, it is vibrated for 3 minutes to clean up the coal slime dust that has peeled off during the drying process, so as to keep the flow channel clean and facilitate secondary feeding and drying.

[0051] In this embodiment, it should be noted that during the drying process, a water vapor outlet 11 can be set on the side of the modular coal slime drying box 2 near the top to draw out the moisture precipitated from the dried coal slime, while increasing air disturbance and accelerating the drying process.

[0052] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

[0053] The background section is provided to generally present the context of this utility model. The work of the currently named inventors, the work to the extent described in this background section, and aspects described in this section that did not constitute prior art at the time of filing are neither expressly nor impliedly acknowledged as prior art to this utility model.

Claims

1. A modular coal slime drying system, characterized in that, include: The system consists of a briquetting device, a modular coal slime drying box, and a screw feeder connected in sequence. The briquetting device is responsible for pressing the coal slime into small balls. The modular coal slime drying box has a drying structure inside for drying the small balls. The screw feeder conveys the dried small balls on one hand, and on the other hand, the rotation of the blades collides with the freely falling small balls, causing the coal slime to break up and disperse.

2. The modular coal slime drying system according to claim 1, characterized in that, A hopper is installed at the inlet above the briquetting equipment for pouring in the collected coal slime.

3. The modular coal slime drying system according to claim 2, characterized in that, The modular coal slime drying box has an inlet at the top and a dry coal slime outlet at the bottom; a scraper conveyor is installed at the outlet below the briquetting device to transport the small balls to the inlet of the coal slime drying box; and a screw feeder is installed at the dry coal slime outlet.

4. A modular coal slime drying system according to claim 3, characterized in that, The coal slime drying box is equipped with a scraper feeder at its inlet.

5. A modular coal slime drying system according to claim 3, characterized in that, The drying structure includes: multiple sets of W-shaped hollow plates, each hollow plate having a drying channel, and a heat source passing through the hollow plate; small balls slowly roll along the direction of the drying channel, and when they reach the end point of a hollow plate, they naturally fall to the lower hollow plate.

6. A modular coal slime drying system according to claim 5, characterized in that, The hollow panels are arranged at an angle of 2°.

7. A modular coal slime drying system according to claim 3, characterized in that, The modular coal slime drying box has a water vapor outlet on its side near the top.

8. A modular coal slime drying system according to claim 7, characterized in that, The water vapor outlet is equipped with N sets of exhaust fans, which on the one hand draw out the moisture precipitated from the dried coal slime, and on the other hand increase air disturbance to accelerate the drying process.

9. A modular coal slime drying system according to claim 8, characterized in that, The water vapor outlet is equipped with three sets of exhaust fans.

10. A modular coal slime drying system according to claim 1, characterized in that, The modular coal slime drying box is also equipped with a vibration device on the outside, which is controlled by a program and used to clean up the coal slime dust that falls off during the drying process.

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