Non-thermal-driven electroosmosis vacuum synergistic drying equipment

Abstract

The invention provides non-thermal-driven electroosmosis vacuum synergistic drying equipment, and belongs to the technical field of sampling and sample preparation equipment, the non-thermal-driven electroosmosis vacuum synergistic drying equipment comprises: a rack, which is provided with anode contacts and cathode contacts distributed on three sides; the anode of the direct-current power supply is connected with the anode contact, and the cathode is connected with the cathode contact; the stainless steel coal sample barrel consists of a barrel body, an anode contact ring, a cathode base and an insulating rubber sealing gasket, and is mounted on the rack; the stainless steel vacuum filter tube is mounted on the cathode base and penetrates through the barrel; the water collecting container is hermetically connected with the bottom of the barrel through a rubber pad; the vacuum pump is fixed on one side of the rack and communicated with the water collecting container. Electrode contacts are arranged on three sides of a rack, a coal sample barrel realizes electrode self-conduction through a contact ring / base, a filter tube is in threaded connection with a cathode base, and a water collecting container is in vacuum sealing. The electrode contacts on the three surfaces ensure 360-degree reliable conduction, the cathode assembly is quickly disassembled and assembled through threaded connection, and the whole structure is suitable for high-water-content material treatment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sampling equipment, and particularly relates to a non-thermal driving electro-osmosis vacuum cooperative drying equipment. BACKGROUND

[0002] Correct coal quality evaluation must have a coal sample which can represent the whole sample, and the representative coal sample must be obtained by a set of standard sampling and sample preparation system, so sampling and sample preparation are the key to correct coal quality evaluation.

[0003] At present, in the drying link of coal sample preparation, the coal sample is mainly dried by an oven drying method, an air permeation drying method and a vacuum drying method. The oven drying method is to remove the moisture of the coal sample by a constant temperature oven, and the oven drying method takes a long time and needs to be dried for many times for high moisture coal. The air permeation drying method depends on the air permeability of the coal sample, and air resistance layer is easily formed for wet and sticky coal mud, and the moisture removal rate is less than 60%. The vacuum drying method avoids oxidation, but it is difficult to overcome the capillary resistance of the coal mud by simple negative pressure, and the drying efficiency is low. SUMMARY

[0004] The present application provides a non-thermal driving electro-osmosis vacuum cooperative drying equipment to solve the defects of the prior art drying equipment.

[0005] The present application provides a non-thermal driving electro-osmosis vacuum cooperative drying equipment, which comprises a rack provided with anode contacts and cathode contacts distributed on three sides, a direct current power supply with a positive electrode connected to the anode contacts and a negative electrode connected to the cathode contacts, a stainless steel coal sample barrel composed of a barrel body, an anode contact ring, a cathode base and an insulating rubber sealing gasket and installed on the rack, a stainless steel vacuum filter pipe installed on the cathode base and penetrating through the barrel body, a water collecting container sealed and connected to the bottom of the barrel body through a rubber pad and a vacuum pump fixed to one side of the rack and communicated with the water collecting container.

[0006] According to the non-thermal driving electro-osmosis vacuum cooperative drying equipment provided by the present application, the anode contact ring is welded to the outer wall of the barrel body, and the height position thereof is matched with the anode contacts of the rack; the cathode base is embedded in the bottom of the barrel body, and the two are electrically isolated by the axially compressed insulating rubber sealing gasket.

[0007] According to the non-thermal driving electro-osmosis vacuum cooperative drying equipment provided by the present application, the insulating rubber sealing gasket has a ring structure, the inner diameter thereof is the same as the outer diameter of the cathode base, and the outer diameter thereof is the same as the inner diameter of the barrel body, so as to realize the dual functions of radial sealing and axial insulation.

[0008] According to the non-thermal driving electro-osmosis vacuum cooperative drying equipment provided by the present application, the top of the cathode base is provided with an internally threaded hole, the bottom end of the stainless steel vacuum filter pipe is provided with a matching externally threaded hole, and the two are screwed to conduct electric current.

[0009] According to the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application, the stainless steel vacuum filter pipe is a porous tubular structure, filter holes are uniformly distributed on the pipe wall, and the total area of the filter holes accounts for 30%-60% of the surface area of the pipe wall.

[0010] According to the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application, the anode contact and the cathode contact are both elastic copper alloy contact pieces, are fixed on the rack, and have an extension length of greater than or equal to 10 mm and an elastic deformation range of 2-5 mm.

[0011] According to the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application, an annular groove is arranged at the interface between the water collecting container and the cylinder, and the rubber pad is embedded in the groove to realize axial compression sealing.

[0012] According to the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application, the cathode base bottom surface is provided with a conductive boss, the height of the boss is 1-3 mm higher than the bottom surface of the insulating rubber sealing pad, and the boss is used for directly contacting the cathode contact of the rack.

[0013] According to the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application, the rack is provided with a positioning clamping groove, the shape of the clamping groove matches the bottom profile of the stainless steel coal sample barrel, and the depth of the clamping groove is 1 / 10-1 / 5 of the height of the barrel.

[0014] According to the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application, the vacuum pump is connected with the water collecting container through a quick release joint, and the quick release joint is embedded with a sealing ring and has a self-locking structure.

[0015] The non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application is characterized in that electrode contacts are arranged on three sides of the rack, the coal sample barrel is electrically self-conducted through a contact ring / base, the filter pipe and the cathode base are screw-connected, and the water collecting container is vacuum sealed. The three-side electrode contacts ensure reliable 360° conduction, the screw connection enables the cathode assembly to be quickly disassembled and assembled, and the overall structure is suitable for processing materials with high water content. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0017] Figure 1 is a structural schematic view of the non-thermal driving electroosmosis vacuum cooperative drying equipment provided by the application; Figure 2 is a front view of the non-thermal driving electro-osmosis vacuum collaborative drying equipment provided by the application; Figure 3 is a structural schematic view of a stainless steel coal sample cylinder.

[0018] Reference signs: 10, coal slurry to be dried; 100, a frame; 110, an anode contact; 120, a cathode contact; 200, a direct current power supply; 300, a stainless steel coal sample barrel; 310, a barrel body; 320, an anode contact ring; 330, a cathode base; 340, an insulating rubber sealing gasket; 400, a stainless steel vacuum filter tube; 500, a water collecting container; 510, a rubber gasket; 520, a drainage port; 600, a vacuum pump. DETAILED DESCRIPTION

[0019] To make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0020] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0021] In the description of the present application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are usually based on Figure 1 the orientation and position of the normal placement of the non-thermal driving electro-osmosis vacuum collaborative drying equipment shown, only for the convenience of describing the present application and simplifying the description, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, therefore cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component itself.

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] The present application provides a non-thermal driving electro-osmosis vacuum cooperative drying equipment, referring to Figures 1-2 , comprising: a rack 100 provided with three-face distributed anode contacts 110 and cathode contacts 120; a direct current power supply 200, the positive electrode is connected to the anode contacts 110, and the negative electrode is connected to the cathode contacts 120; a stainless steel coal sample barrel 300, which is composed of a cylinder body 310, an anode contact ring 320, a cathode base 330 and an insulating rubber sealing pad 340, is installed on the rack 100; a stainless steel vacuum filter pipe 400 is installed on the cathode base 330 and penetrates through the cylinder body 310; a water collecting container 500 is sealingly connected with the bottom of the cylinder body 310 through a rubber pad 510; and a vacuum pump 600 is fixed on one side of the rack 100 and communicates with the water collecting container 500.

[0024] The three-face electrode contacts ensure reliable conduction of 360°, the threaded connection realizes quick disassembly and assembly of the cathode assembly, and the overall structure is suitable for processing materials with high moisture content. When the stainless steel coal sample barrel 300 is placed in the rack 100, the anode contact ring 320 automatically conducts the anode contacts 110, and the cathode base 330 automatically conducts the cathode contacts 120, so that the cylinder body 310 constitutes an anode and the vacuum filter pipe constitutes a cathode.

[0025] Exemplarily, the rack 100 adopts a 304 stainless steel welded frame.

[0026] In an embodiment, referring to Figure 3 , the anode contact ring 320 is welded to the outer wall of the cylinder body 310, and the height position thereof matches the anode contacts 110 of the rack 100; the cathode base 330 is embedded in the bottom of the cylinder body 310, and the two are electrically isolated by the axially compressed insulating rubber sealing pad 340.

[0027] The anode contact ring 320 is welded to the outer wall of the cylinder body 310, and the cathode base 330 is isolated from the cylinder body 310 by an insulating pad. The welded contact ring avoids contact resistance fluctuation, and the compressed sealing pad synchronously solves the risk of sealing leakage and current short circuit.

[0028] In an embodiment, the insulating rubber sealing pad 340 is in a ring structure, the inner diameter of which is the same as the outer diameter of the cathode base 330, and the outer diameter of which is the same as the inner diameter of the cylinder body 310, realizing the dual functions of radial sealing and axial insulation. The ring-shaped sealing pad matches the outer diameter of the cathode base 330 and the inner diameter of the cylinder body 310.

[0029] In an embodiment, the top of the cathode base 330 is provided with an internally threaded hole, and the bottom end of the stainless steel vacuum filter tube 400 is provided with a matching externally threaded hole, and the two are screwed together to conduct current.

[0030] In an embodiment, the stainless steel vacuum filter tube 400 is a porous tubular structure, and the filter holes are uniformly distributed on the tube wall, and the total area of the filter holes accounts for 30%-60% of the surface area of the tube wall. Intercepting coal particles while maintaining water flow rate, avoiding water accumulation in the cathode area.

[0031] In an embodiment, the anode contact 110 and the cathode contact 120 are both elastic copper alloy contact pads fixed on the rack 100, and the contact pads have an extension length of ≥10mm and an elastic deformation range of 2-5mm. The self-compensation mechanism adapts to ±2mm installation error.

[0032] In an embodiment, the water collecting container 500 is provided with an annular groove at the interface with the cylinder body 310, and the rubber pad 510 is embedded in the groove to realize axial compression sealing.

[0033] In an embodiment, the bottom surface of the cathode base 330 is provided with a conductive boss, which is 1-3mm higher than the bottom surface of the insulating rubber sealing pad 340, for directly contacting the cathode contact 120 of the rack 100.

[0034] The boss preferentially contacts the cathode contact 120, avoiding short circuit caused by wear of the insulating pad, and improving the conduction reliability to 99.9%.

[0035] In an embodiment, the rack 100 is provided with a positioning clamping groove, which has a shape matching the bottom profile of the stainless steel coal sample barrel 300 and a depth of 1 / 10-1 / 5 of the barrel height. The positioning accuracy is ±0.5mm, the risk of barrel body tilting is reduced by 90%, and it is particularly suitable for viscous material loading conditions.

[0036] In an embodiment, the vacuum pump 600 is connected to the water collecting container 500 through a quick release connector, and the quick release connector is embedded with a sealing ring and has a self-locking structure.

[0037] In an embodiment, the water collecting container 500 is provided with a transparent liquid level window and a liquid level sensor on the side wall, and a drain 520 with a solenoid valve at the bottom.

[0038] Unattended drainage is realized, and the single drying manual intervention time is shortened.

[0039] The present application provides a use method of a non-thermal drive electro-osmotic vacuum cooperative drying equipment, and the specific steps are as follows: (a) loading the coal slurry to be dried into the stainless steel coal sample barrel 300; (b) placing the coal sample barrel on the rack 100 to automatically connect the electrodes; (c) starting the direct current power supply 200 to form a directional electric field in the material and drive the cations to migrate towards the cathode with free water; (d) synchronously starting the vacuum pump 600 to suck the water migrated to the vacuum filter tube to the water collecting container 500; (e) continuously performing the electro-osmosis-vacuum synergy until the moisture content of the to-be-dried coal slime reaches the standard.

[0040] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A non-thermally driven electroosmosis vacuum synergistic drying device, characterized in that, include: The frame is equipped with anode and cathode contacts distributed on three sides; A DC power supply, with its positive terminal connected to the anode contact and its negative terminal connected to the cathode contact; The stainless steel coal sample container, consisting of a cylindrical body, an anode contact ring, a cathode base, and an insulating rubber sealing gasket, is mounted on the frame. A stainless steel vacuum filter tube is installed on the cathode base and extends through the cylindrical body; The water collection container is sealed to the bottom of the cylinder via a rubber gasket; A vacuum pump is fixed to one side of the frame and connected to the water collection container.

2. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, The anode contact ring is welded to the outer wall of the cylinder, and its height position matches the anode contact of the frame; The cathode base is embedded in the bottom of the cylinder, and the two are electrically isolated by the axially compressed insulating rubber sealing gasket.

3. The non-thermal-driven electroosmosis vacuum synergistic drying equipment according to claim 2, characterized in that, The insulating rubber sealing gasket has an annular structure, with its inner diameter being the same as the outer diameter of the cathode base and its outer diameter being the same as the inner diameter of the cylinder, thus achieving both radial sealing and axial insulation functions.

4. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, The cathode base has an internal threaded hole at the top, and the stainless steel vacuum filter tube has a matching external thread at the bottom. The two are connected by screwing to conduct current.

5. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, The stainless steel vacuum filter tube has a porous tubular structure with filter holes evenly distributed on its wall, and the total area of ​​the filter holes accounts for 30%-60% of the surface area of ​​the tube wall.

6. The non-thermal-driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, Both the anode and cathode contacts are elastic copper alloy contact pieces, fixed on the frame, with a contact piece extension length ≥10mm and an elastic deformation range of 2-5mm.

7. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, The interface between the water collection container and the cylinder is provided with an annular groove, and the rubber gasket is embedded in the groove to achieve axial compression and sealing.

8. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 2, characterized in that, The cathode base has a conductive protrusion on its bottom surface, which extends 1-3 mm above the bottom surface of the insulating rubber sealing gasket, and is used to directly contact the cathode contact of the frame.

9. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, The frame is equipped with a positioning slot, the shape of which matches the bottom contour of the stainless steel coal sample barrel, and the depth is 1 / 10-1 / 5 of the barrel height.

10. The non-thermal driven electroosmosis vacuum synergistic drying equipment according to claim 1, characterized in that, The vacuum pump is connected to the water collection container via a quick-release connector, which has an embedded sealing ring and a self-locking structure.

Images