Coal drying device with novel steam temperature-pressure electromagnetic transient release and drying method thereof

Abstract

The application discloses a novel coal drying device with steam temperature-pressure electromagnetic transient release and a drying method thereof, and relates to the technical field of coal drying. The device comprises a dehydration outer tank, a dehydration inner tank, a steam electromagnetic transient release device and a tank body upper cover. The side wall of the dehydration outer tank is provided with a steam inlet, and the upper end of the dehydration outer tank is provided with a steam outlet. The dehydration inner tank is located in the dehydration outer tank and can be used for placing wet coal. The steam electromagnetic transient release device is arranged above the dehydration outer tank and comprises an electromagnet assembly and a sliding support structure. The electromagnet assembly comprises an electromagnet sheet and an armature sheet. The electromagnet sheet is slidably connected to the sliding support structure, and the armature sheet is fixed to the sliding support structure. The electromagnet sheet is connected with an electromagnetic switch. The tank body upper cover is fixedly connected with the lower end of the electromagnet sheet and can be used for plugging the steam outlet. The steam in the dehydration outer tank can be instantaneously released, so that the coal drying and dehydration effect is strengthened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coal drying, in particular to a novel steam temperature-pressure electromagnetic transient release coal drying device and drying method thereof. BACKGROUND

[0002] Coal is the main energy source in China, however, most of the coal resources in China are low metamorphic degree coal, which has high water content (20-60%) and low calorific value, seriously restricting its clean and efficient utilization. Low-rank coal transient dehydration technology generally uses high-pressure steam transient release to dehydrate the raw materials, and the faster the pressure release speed, the higher the processing intensity.

[0003] The traditional pressure release mechanism mainly controls the steam discharge through electric switches or electromagnetic valves and the like, however, such control devices have defects such as slow pressure release, easy failure of electromagnetic valves or difficulty in disassembly.

[0004] Therefore, there is an urgent need for a novel steam temperature-pressure electromagnetic transient release coal drying device and drying method thereof to solve the above problems. SUMMARY

[0005] The present application aims to provide a novel steam temperature-pressure electromagnetic transient release coal drying device and drying method thereof to solve the technical problems existing in the prior art, which can quickly release steam, strengthen the coal drying and dehydration effect, and increase safety.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0007] The present application discloses a novel steam temperature-pressure electromagnetic transient release coal drying device, comprising:

[0008] A dehydration outer tank, a steam inlet is arranged on the side wall of the dehydration outer tank, the steam inlet is used for connecting a steam pipeline, and a steam outlet is arranged at the upper end of the dehydration outer tank;

[0009] A dehydration inner tank, the dehydration inner tank is located in the dehydration outer tank, and the dehydration inner tank can be used for placing wet coal;

[0010] A steam electromagnetic transient release device, the steam electromagnetic transient release device is arranged above the dehydration outer tank, the steam electromagnetic transient release device comprises an electromagnet assembly and a sliding support structure, the electromagnet assembly comprises an electromagnet sheet and an armature sheet, the electromagnet sheet is slidably connected to the sliding support structure, the armature sheet is fixed to the sliding support structure, the electromagnet sheet is located above the armature sheet, and the electromagnet sheet is connected with an electromagnetic switch;

[0011] A can upper cover is fixedly connected with the lower end of the electromagnetic sheet, and can be used to block the steam outlet.

[0012] Preferably, the dehydration inner can is a mesh tube structure.

[0013] Preferably, the sliding support structure comprises a plurality of positioning columns and a fixed plate, the positioning columns are fixed to the lower surface of the fixed plate, the electromagnetic sheet is provided with sliding through holes, each positioning column passes through a sliding through hole, and the armature sheet is fixed to the lower end of the positioning column.

[0014] Preferably, the upper end of the positioning column is fixed with a buffer pad, and the buffer pad is located on the lower surface of the fixed plate.

[0015] Preferably, the electromagnetic sheet, the armature sheet and the can upper cover are coaxially arranged, and the center of the armature sheet is provided with a central passage.

[0016] Preferably, the can upper cover is provided with a sealing ring.

[0017] Preferably, the dehydration outer can and the steam electromagnetic transient release device are arranged on a support frame.

[0018] The application further discloses a drying method of the novel steam temperature-pressure electromagnetic transient release based coal drying device.

[0019] S1, wet coal is loaded into the dehydration inner can, an electromagnetic switch is turned on to electrify the electromagnetic sheet, the armature sheet is tightly attached to the electromagnetic sheet under magnetic adsorption, and the can upper cover is tightly pressed on the steam outlet;

[0020] S2, steam is introduced to perform reverse seepage;

[0021] S3, the electromagnetic switch is controlled to de-energize the electromagnetic sheet, the armature sheet is instantaneously free of load from the electromagnetic sheet, the pressure difference between the pressure in the dehydration outer can and the atmospheric pressure causes the can upper cover to pop out, and the transient safety pressure release is completed;

[0022] S4, after the release is completed, the water in the coal is removed under the driving of the internal and external pressure and temperature difference, the electromagnetic switch is started to re-electrify the electromagnetic sheet, the armature sheet is re-adsorbed, and steps S1-S3 are repeated until the dehydration of the wet coal reaches the qualified standard.

[0023] The application has the following technical effects relative to the prior art:

[0024] The application promotes the temperature and pressure state of the internal pore water of the coal through the reverse seepage of the steam, and releases the steam pressure instantaneously through the electromagnetic transient release device, so that the dehydration transient effect of the coal is improved, the dehydration process is safe and stable, and the device has high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a novel steam temperature and pressure electromagnetic transient release coal drying device according to an embodiment of the present invention;

[0027] In the diagram: 1-Steam inlet; 2-Outer dehydration tank; 3-Inner dehydration tank; 4-Steam electromagnetic transient release device; 5-Tank cover; 6-Sealing ring; 7-Fixing plate; 8-Positioning column; 9-Buffer pad; 10-Armature plate; 11-Electromagnetic plate; 12-Electromagnetic switch. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] The purpose of this invention is to provide a novel coal drying device and method with transient release of steam temperature, pressure, and electromagnetic force, which solves the technical problems existing in the prior art. It can release steam quickly, enhance the coal drying and dehydration effect, and increase safety.

[0030] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figure 1 As shown, this embodiment provides a novel coal drying device with transient release of steam temperature, pressure, and electromagnetic force, comprising:

[0033] The outer dehydration tank 2 has a steam inlet 1 on its side wall. The steam inlet 1 is used to connect to a steam pipeline. The other end of the steam pipeline is used to connect to a steam source. Steam can be introduced into the steam inlet 1 through the steam pipeline. In addition, a solenoid valve can be installed at the steam inlet 1 to control the flow of steam. The upper end of the outer dehydration tank 2 has a steam outlet.

[0034] The dehydration inner tank 3 is located in the dehydration outer tank 2, and can be directly placed in the dehydration outer tank 2 or fixed in the dehydration outer tank 2 by welding or screws, and can be used to place wet coal.

[0035] The steam electromagnetic transient release device 4 is arranged above the dehydration outer tank 2, and includes an electromagnetic iron assembly and a sliding support structure. The electromagnetic iron assembly includes an electromagnetic sheet 11 and an armature sheet 10. The electromagnetic sheet 11 is slidably connected to the sliding support structure and can slide up and down on the sliding support structure. The armature sheet 10 is fixed to the sliding support structure, and the electromagnetic sheet 11 is located above the armature sheet 10. The electromagnetic sheet 11 is connected with an electromagnetic switch 12. Specifically, the electromagnetic iron assembly is a prior art, and its specific principle is that the outer ring of the electromagnetic sheet 11 is provided with a coil, and the coil is electrically connected with the electromagnetic switch 12 through a connecting wire. When the electromagnetic switch 12 is turned on, the coil is energized to magnetize the electromagnetic sheet 11, so that it has magnetic force and can attract the armature sheet 10.

[0036] The tank body upper cover 5 is fixedly connected with the lower end of the electromagnetic sheet 11 and can be used to block the steam outlet. When the electromagnetic sheet 11 is attracted to the armature sheet 10, the tank body upper cover 5 can block the steam outlet.

[0037] When it is necessary to dehydrate and dry wet coal, the wet coal is first placed in the dehydration inner tank 3. The electromagnetic switch 12 is turned on to make the electromagnetic sheet 11 attract the armature sheet 10 to block the steam outlet. Then the electromagnetic valve at the steam inlet 1 is opened, and a certain temperature and pressure steam is filled into the dehydration outer tank 2 through the steam pipeline to perform reverse seepage, so as to increase the internal pore temperature and pressure of the coal. When the expected steam amount is reached, the steam is closed. After a period of time, the electromagnetic switch 12 is turned off to make the electromagnetic sheet 11 lose magnetic force, and then the pressure difference between the pressure in the dehydration outer tank 2 and the atmospheric pressure makes the tank body upper cover 5 pop out, so that the steam pressure is transiently released, thereby improving the coal dehydration transient effect.

[0038] In the embodiment, the dehydration inner tank 3 is a mesh tube structure, that is, the overall shape is a cylindrical shape, and the side wall and the top are mesh structures. The purpose of such arrangement is to enable the steam in the dehydration outer tank 2 to quickly enter the dehydration inner tank 3.

[0039] In the embodiment, the sliding support structure comprises a plurality of positioning columns 8 and a fixing plate 7. The number of the positioning columns 8 is four, which are respectively located at four corners of the fixing plate 7 and are fixed to the lower surface of the fixing plate 7. The electromagnetic sheet 11 is provided with sliding through holes, the number of which is the same as that of the positioning columns 8. Each positioning column 8 passes through a sliding through hole. When the electromagnetic sheet 11 slides up and down, the positioning column 8 can limit the electromagnetic sheet 11 to prevent the tank upper cover 5 from shaking violently. The armature sheet 10 is fixed to the lower end of the positioning column 8, and the armature sheet 10 itself will not displace.

[0040] In the embodiment, the upper end of the positioning column 8 is fixed with a buffer pad 9, which is made of rubber or silica gel. The buffer pad 9 is located on the lower surface of the fixing plate 7. When the pressure in the dehydration outer tank 2 pushes the tank upper cover 5 out, the positioning column 8 and the buffer pad 9 limit the outward bounce range of the tank upper cover 5 and complete the transient safety pressure release under double buffering protection.

[0041] In the embodiment, the electromagnetic sheet 11, the armature sheet 10 and the tank upper cover 5 are coaxially arranged. The center of the armature sheet 10 is provided with a center passage, and the tank upper cover 5 can pass through the center passage when being pushed up.

[0042] In the embodiment, the tank upper cover 5 is provided with a sealing ring 6 to improve the air tightness between the tank upper cover 5 and the steam outlet.

[0043] In the embodiment, the dehydration outer tank 2 and the steam electromagnetic transient release device 4 are arranged on the support frame. Specifically, the lower end of the positioning column 8 can be welded or threadedly connected to the support frame, and the dehydration outer tank 2 only needs to be placed on the support frame.

[0044] Embodiment two,

[0045] The embodiment provides a drying method of a new coal drying device based on the steam temperature and pressure electromagnetic transient release of the embodiment one, which comprises the following steps.

[0046] S1, wet coal is loaded into the dehydration inner tank 3. The wet coal is selected to be raw coal with a water content of 30%. The dehydration inner tank 3 is a mesh structure with a mesh size of 0.5 mm. The electromagnetic switch 12 is turned on to electrify the electromagnetic sheet 11. The armature sheet 10 is tightly attached to the electromagnetic sheet 11 under magnetic attraction. The tank upper cover 5 is tightly pressed on the steam outlet to realize the sealing of the dehydration outer tank 2.

[0047] S2, 220 DEG C steam is introduced to directly contact with the coal to realize reverse seepage, so as to improve the internal pore temperature and pressure of the coal and maintain the temperature for 5 min.

[0048] S3, when the pressure is released, the electromagnetic switch 12 is used to control the electromagnetic sheet 11 to be powered off, the armature sheet 10 and the electromagnetic sheet 11 are instantaneously unloaded, the pressure difference between the inner pressure of the dehydration outer tank 2 and the atmospheric pressure makes the tank body upper cover 5 pop out, the pressure transient release process is 0.01s, under the double buffering protection of the positioning column 8 and the buffer pad 9, the transient safety pressure release is completed;

[0049] S4, after the release is completed, the moisture in the coal is removed under the driving of the inner and outer pressure and temperature difference, the inner tank is taken out, the moisture of the coal is reduced to 15%, the electromagnetic switch 12 is started to make the electromagnetic sheet 11 be recharged, the armature sheet 10 is reabsorbed, and the steps S1-S3 are repeated until the dehydration of the wet coal reaches the qualified standard.

[0050] Example three,

[0051] The embodiment provides a new coal drying device drying method of steam temperature and pressure electromagnetic transient release, the disclosed technical features are basically the same as those of example two, and the difference lies in that the following steps are included.

[0052] S1, wet coal is loaded into the dehydration inner tank 3, the wet coal selects raw coal with a moisture content of 20%, the electromagnetic switch 12 is opened to charge the electromagnetic sheet 11, and the armature sheet 10 is tightly attached to the electromagnetic sheet 11 under the magnetic attraction, the tank body upper cover 5 is tightly pressed on the steam outlet, so that the dehydration outer tank 2 is sealed;

[0053] S2, 250 DEG C steam is introduced to directly contact the coal and perform reverse seepage, the internal pore temperature and pressure of the coal are improved, and the temperature is maintained for 3 min;

[0054] S3, when the pressure is released, the electromagnetic switch 12 is used to control the electromagnetic sheet 11 to be powered off, the armature sheet 10 and the electromagnetic sheet 11 are instantaneously unloaded, the pressure difference between the inner pressure of the dehydration outer tank 2 and the atmospheric pressure makes the tank body upper cover 5 pop out, the pressure transient release process is 0.01s, under the double buffering protection of the positioning column 8 and the buffer pad 9, the transient safety pressure release is completed;

[0055] S4, after the release is completed, the moisture in the coal is removed under the driving of the inner and outer pressure and temperature difference, the inner tank is taken out, the moisture of the coal is reduced to 10%, the electromagnetic switch 12 is started to make the electromagnetic sheet 11 be recharged, the armature sheet 10 is reabsorbed, and the steps S1-S3 are repeated until the dehydration of the wet coal reaches the qualified standard.

[0056] In the specification, specific examples are applied to describe the principles and implementation modes of the application, and the above examples are only used to help understand the method and core idea of the application; meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation modes and application ranges can be changed. In summary, the content of the specification should not be understood as a limitation of the application.

Claims

1. A novel coal drying device with steam temperature-pressure electromagnetic transient release, characterized in that, The utility model relates to a kind of coal dehydration device, comprising: Dehydrated outer tank, steam inlet is provided on the sidewall of the dehydrated outer tank, the steam inlet is used to connect steam pipeline, the upper end of the dehydrated outer tank is provided with steam outlet; Dehydrated inner tank, the dehydrated inner tank is located in the dehydrated outer tank, and the dehydrated inner tank can be used to place wet coal; Steam electromagnetic transient release device, the steam electromagnetic transient release device is arranged above the dehydrated outer tank, and the steam electromagnetic transient release device includes electromagnet assembly and sliding support structure, the electromagnet assembly includes electromagnetic sheet and armature sheet, the electromagnetic sheet is slidably connected to the sliding support structure, the armature sheet is fixed to the sliding support structure, the electromagnetic sheet is located above the armature sheet, and the electromagnetic sheet is connected with electromagnetic switch; Tank body upper cover, the tank body upper cover is fixedly connected with the lower end of the electromagnetic sheet, and the tank body upper cover can be used to block the steam outlet; The dehydrated inner tank is a net cylinder structure; The sliding support structure includes a plurality of positioning columns and a fixed plate, the positioning columns are fixed to the lower surface of the fixed plate, the electromagnetic sheet is provided with sliding through hole, each positioning column passes through a sliding through hole, and the armature sheet is fixed to the lower end of the positioning column.

2. The novel coal drying apparatus of claim 1, wherein: The upper end of the positioning column is fixed with buffer pad, and the buffer pad is located on the lower surface of the fixed plate.

3. The novel coal drying apparatus of claim 1, wherein: The electromagnetic sheet, the armature sheet and the tank body upper cover are coaxially arranged, and the center of the armature sheet is provided with central passage.

4. The novel coal drying apparatus of claim 1, wherein: The tank body upper cover is provided with sealing ring.

5. The novel coal drying apparatus of claim 1, wherein: The dehydrated outer tank and the steam electromagnetic transient release device are arranged on the support frame.

6. A drying method based on the new coal drying device with vapor temperature-pressure electromagnetic transient release according to any one of claims 1-5, characterized in that, The utility model includes the following steps: S1, wet coal is loaded in the dehydrated inner tank, electromagnetic switch is opened to make electromagnetic sheet electrified, armature sheet is tightly attached to electromagnetic sheet under magnetic adsorption, and tank body upper cover is tightly pressed on steam outlet; S2, reverse seepage is carried out by inputting steam; S3, electromagnetic sheet is controlled to be deenergized by electromagnetic switch, there is no load between armature sheet and electromagnetic sheet, the pressure difference between the pressure in the dehydrated outer tank and atmospheric pressure makes tank body upper cover pop out, and transient safety pressure release is completed; S4, after release is completed, water in coal is removed under the driving of internal and external pressure and temperature difference, electromagnetic switch is started to make electromagnetic sheet recharged, armature sheet is reabsorbed, and steps S1-S3 are repeated until the dehydration of wet coal reaches qualified standard.

Images