Quick-drying vacuum drying equipment for lignite

Abstract

The vacuum drying equipment comprises a drying box, a vacuum pump machine is arranged on one side of the drying box, a ventilation pipe is fixedly connected between the vacuum pump machine and the top of the drying box, and a re-pressing pipe is fixedly connected to the side, close to the vacuum pump machine, of the ventilation pipe. The re-pressing pipe and the ventilation pipe are each provided with an air valve. An anti-blocking assembly is arranged on the side, close to the vacuum pump machine, of the bottom of the ventilation pipe. The anti-blocking assembly comprises a circulation box, the circulation box is fixedly connected with the ventilation pipe, a partition plate is fixedly connected to the lower portion of the interior of the circulation box, a second filter screen is fixedly connected to the top of the partition plate, and a first filter screen is fixedly connected to the side, close to the vacuum pump machine, of the interior of the ventilation pipe. The anti-blocking assembly enables dust not to directly enter the vacuum pump, blocking caused by the fact that dust is attached to the filter screens is avoided, manual cleaning time is saved, and working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum drying, in particular to vacuum drying equipment for rapid drying of lignite. Background Art

[0002] Lignite is a flammable material. The bound water in lignite is not easy to volatilize. It requires higher temperature and energy to evaporate. When lignite is heated to above 180 degrees under normal pressure, the bound water (internal water) of lignite can be removed, but the surface properties of lignite will change at this time. Therefore, lignite can be dried by vaporizing the water in the material under low pressure and low temperature to increase the drying efficiency.

[0003] Publication No. CN204944049U discloses a vacuum drying device for lignite drying. The lower end of the coal bunker of the device is connected to the upper end of the vacuum drying tank through a vacuum air lock. The lower end of the vacuum drying tank is provided with a vacuum air lock. The vacuum drying tank is a double-layer sandwich tank body. The upper part of the vacuum drying tank is provided with a high-temperature flue gas inlet, and the lower part of the vacuum drying end is provided with a high-temperature flue gas outlet. The vacuum drying tank is provided with five layers of vacuum holes along its height direction. The number of vacuum holes in each layer is 2 to 4. The vacuum holes are connected to one end of the vacuum pump through a pipeline, and the other end of the vacuum pump is connected to the upper part of the steam-water separator through a pipeline. This device solves the problem that the vacuum lignite drying device does not perform graded vacuuming and has low drying efficiency. However, the patent still has the following problems in actual use:

[0004] When the vacuum pump in the existing vacuum drying device includes the above-mentioned device, the floating lignite dust will be directly sucked into the vacuum pump when the vacuum hole is used for vacuuming, causing the vacuum pump to be blocked and contaminated, so that it is necessary to clean the vacuum pump regularly. Moreover, as the vacuum pump is blocked, the time required for vacuuming will increase, resulting in reduced work efficiency. The existing filter net that prevents the vacuum pump from entering the lignite dust needs to be cleaned frequently, and its practicality is relatively low. In addition, during the drying process, the lignite will clump, but the moisture of the agglomerated lignite is not easy to volatilize, which affects the drying speed.

[0005] A vacuum drying device for rapid drying of lignite is proposed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a vacuum drying device for rapid drying of lignite, so as to solve the problem that the floating lignite dust will be directly sucked into the vacuum pump proposed in the above-mentioned background technology, and as the vacuum pump is blocked, the time required for vacuuming will increase, resulting in reduced work efficiency and the problem that the lignite will agglomerate during the drying process.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a vacuum drying device for rapid drying of lignite, comprising a drying box, a heating pipe is buried in the inner wall of the drying box, a raw material box is arranged above the drying box, a vacuum pump is arranged on one side of the drying box, a ventilation pipe is fixedly connected between the vacuum pump and the top of the drying box, a re-pressurizing pipe is fixedly connected to the side of the ventilation pipe close to the vacuum pump, and air valves are installed on the re-pressurizing pipe and the ventilation pipe;

[0008] An anti-blocking component is provided at the bottom of the ventilation pipe and on one side close to the vacuum pump, and a dispersing mechanism is provided at the lower part of the drying box;

[0009] Among them, the anti-blocking component includes a circulation box, which is fixedly connected to the ventilation pipe, a partition plate is fixedly connected to the lower part of the circulation box, a second filter is fixedly connected to the top of the partition plate, a first filter is fixedly connected to the side of the ventilation pipe close to the vacuum pump, and a first one-way plate is provided inside the ventilation pipe and above the circulation box.

[0010] Preferably, the second filter screen divides the circulation box into two parts, a debris bin and a circulation bin on the left and right, the first one-way plate is located between the debris bin and the top opening of the circulation bin, a slag discharge port is opened at the bottom of the debris bin, and a closing plate is provided below the slag discharge port.

[0011] Preferably, a second one-way plate is rotatably connected to the top of the circulation bin, and a limiting block fixedly connected to the circulation box is overlapped below the second one-way plate.

[0012] Preferably, the first filter screen and the second filter screen are rotatably connected with a rotating shaft, the other end of the rotating shaft is fixedly connected with a fan blade, the side of the rotating shaft is fixedly connected with a scraper, the end of the ventilation pipe extending into the interior of the drying box is sleeved with a third filter screen, and the first one-way plate is rotatably connected to the ventilation pipe.

[0013] Preferably, the breaking mechanism includes rotating rods symmetrically arranged at the lower part of the interior of the drying box, and the ends of the two rotating rods close to each other are fixedly connected to the first gear, the first gear is meshed with the second gear, and the outside of the second gear and the first gear is provided with a protective frame, the bottom of the protective frame is fixedly connected to the drying box, and the first stirring rod is fixedly connected to the rotating rod.

[0014] Preferably, a screen is fixedly connected to the upper part of the interior of the drying box, a vertical rod is connected through the middle of the screen, a plurality of second stirring rods are fixedly connected to the vertical rod, and the vertical rod is also fixedly connected to a cross rod after passing through the screen, and one of the rotating rods is fixedly connected to the first motor.

[0015] Preferably, a plurality of scraping columns are fixedly connected to the bottom surface of the cross bar, a scraping rod is fixedly connected to the top surface of the cross bar, the bottom end of the vertical rod passes through the second gear and is rotatably connected to the protective frame, and the vertical rod is fixedly connected to the second gear.

[0016] Compared with the prior art, the utility model has the beneficial effects that: the vacuum drying equipment for quick drying of lignite prevents dust from directly entering the vacuum pump, avoids dust adhering to each filter screen to cause blockage, and avoids the need for frequent manual cleaning, thereby increasing work efficiency, and also preliminarily breaks up the raw materials, thereby avoiding agglomeration of the raw materials during the drying process, resulting in uneven heating, thereby reducing the drying efficiency. The specific contents are as follows:

[0017] 1. When the air is extracted through the ventilation pipe by the vacuum pump, the airflow will first push open the first one-way plate, and then the dust will be filtered by the first filter. After the drying is completed, the air valve on the re-pressure pipe is opened. At this time, the outside air will enter the drying box through the ventilation pipe and the second filter due to the pressure. In this process, the fan blades will be driven by the airflow to drive the scraper, so that the dust on the first filter and the second filter will be scraped off, so that the dust cannot directly enter the vacuum pump, and the dust attached to the filter screens is avoided. Blockage caused by dust and frequent manual cleaning are avoided, which increases work efficiency;

[0018] 2. The vertical rod and another rotating rod are rotated by the first gear and the second gear, and then the material is discharged through the raw material box; at this time, the raw material falls onto the screen, and the rotation of the vertical rod causes the second stirring rod and the horizontal rod to rotate, thereby loosening the raw material that may have agglomerated on the screen, and then falls through the screen under the scraping of the scraper, and finally the raw material is initially broken up, while avoiding agglomeration of the raw material during the drying process, resulting in uneven heating, thereby reducing the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front cross-section structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0021] Figure 3 For this utility model Figure 1 The enlarged structural diagram at B in the middle;

[0022] Figure 4 Schematic diagram of the top view of the screen;

[0023] Figure 5 It is a top view structural diagram of the crossbar.

[0024] In the figure: 1. drying box; 101. heating tube; 102. raw material box; 103. vacuum pump; 104. ventilation pipe; 105. re-pressure pipe; 2. anti-blocking component; 201. circulation box; 202. first filter; 203. partition plate; 204. second filter; 205. first one-way plate; 206. debris bin; 207. circulation bin; 208. second one-way plate; 209. rotating shaft; 210. fan blade; 211. closing plate; 212. third filter; 3. scattering mechanism; 301. rotating rod; 302. first motor; 303. first stirring rod; 304. protective frame; 305. first gear; 306. second gear; 307. vertical rod; 308. second stirring rod; 309. screen; 310. horizontal rod; 311. scraping rod; 312. scraping column. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 The utility model provides a technical solution: a vacuum drying device for rapid drying of lignite, comprising a drying box 1, a heating pipe 101 is buried in the inner wall of the drying box 1, a raw material box 102 is arranged above the drying box 1, a vacuum pump 103 is arranged on one side of the drying box 1, a ventilation pipe 104 is fixedly connected between the vacuum pump 103 and the top of the drying box 1, a re-pressurizing pipe 105 is fixedly connected to the side of the ventilation pipe 104 close to the vacuum pump 103, and air valves are installed on the re-pressurizing pipe 105 and the ventilation pipe 104;

[0027] An anti-blocking component 2 is provided at the bottom of the ventilation pipe 104 and close to the vacuum pump 103, and a dispersing mechanism 3 is provided at the lower part of the drying box 1;

[0028] Among them, the anti-blocking component 2 includes a circulation box 201, which is fixedly connected to the ventilation pipe 104, a partition plate 203 is fixedly connected to the lower part of the circulation box 201, a second filter screen 204 is fixedly connected to the top of the partition plate 203, a first filter screen 202 is fixedly connected to the side of the ventilation pipe 104 close to the vacuum pump 103, and a first one-way plate 205 is provided inside the ventilation pipe 104 and above the circulation box 201; a discharge port is provided at the lower part of the drying box 1, and a plug is fixedly connected to the blocking knob of the discharge port, the plug can prevent the raw material from falling into the discharge port, and the circulation box 201 is located between the two air valves.

[0029] The second filter 204 divides the circulation box 201 into two parts, a debris bin 206 and a circulation bin 207. The first one-way plate 205 is located between the debris bin 206 and the top opening of the circulation bin 207. A slag discharge port is provided at the bottom of the debris bin 206, and a closing plate 211 is provided below the slag discharge port. The closing plate 211 is connected to the circulation box 201 by bolts.

[0030] The top of the circulation bin 207 is rotatably connected to a second one-way plate 208 , and a limit block fixedly connected to the circulation box 201 is overlapped below the second one-way plate 208 ; the limit block allows the second one-way plate 208 to rotate only upward.

[0031] The first filter screen 202 and the second filter screen 204 are rotatably connected with a rotating shaft 209, the other end of the rotating shaft 209 is fixedly connected with a fan blade 210, and the side of the rotating shaft 209 is fixedly connected with a scraper. The end of the ventilation pipe 104 extending into the interior of the drying box 1 is sleeved with a third filter screen 212, and the first one-way plate 205 is rotatably connected to the ventilation pipe 104; the third filter screen 212 is an arc-shaped net, so that it can be cleaned by the scraper rod 311, and the third filter screen 212 can prevent a large amount of coal from pouring into the ventilation pipe 104.

[0032] The breaking mechanism 3 includes rotating rods 301 symmetrically arranged at the lower part of the drying box 1, and the ends of the two rotating rods 301 close to each other are fixedly connected to the first gear 305, and the first gear 305 is meshed with the second gear 306. A protective frame 304 is provided outside the second gear 306 and the first gear 305, and the bottom of the protective frame 304 is fixedly connected to the drying box 1, and the first stirring rod 303 is fixedly connected to the rotating rod 301.

[0033] A screen 309 is fixedly connected to the upper part of the interior of the drying box 1, a vertical rod 307 is connected through the middle of the screen 309, a plurality of second stirring rods 308 are fixedly connected to the vertical rod 307, and a horizontal rod 310 is fixedly connected to the vertical rod 307 after the vertical rod 307 passes through the screen 309, and a rotating rod 301 is fixedly connected to the first motor 302; the hole spacing of the screen 309 is large and not easy to be blocked.

[0034] A plurality of scraping posts 312 are fixedly connected to the bottom surface of the cross bar 310, a scraping rod 311 is fixedly connected to the top surface of the cross bar 310, the bottom end of the vertical rod 307 passes through the second gear 306 and is rotatably connected to the protective frame 304, and the vertical rod 307 is fixedly connected to the second gear 306; the scraping posts 312 can act as a sled during the rotation process to promote the falling of raw materials.

[0035] Working principle: Before using this kind of vacuum drying equipment for quick drying of lignite, it is necessary to check the overall condition of the device to ensure that it can work normally. Figure 1 - Figure 5As shown, firstly, the first motor 302 is started, and the vertical rod 307 and the other rotating rod 301 are rotated through the first gear 305 and the second gear 306, and then the raw material box 102 is used to discharge the material;

[0036] At this time, the raw material falls onto the screen 309, and the rotation of the vertical rod 307 causes the second stirring rod 308 and the horizontal rod 310 to rotate, thereby loosening the raw material that may have agglomerated on the screen 309, and then falls through the screen 309 under the scraping of the scraper 312;

[0037] Then, the vacuum pump 103 is started, and the air valve on the ventilation pipe 104 is opened, so that the air in the drying box 1 is drawn out through the ventilation pipe 104. When the airflow passes through the ventilation pipe 104, it first pushes open the first one-way plate 205, and then the dust is filtered by the first filter 202. After the air pressure in the drying box 1 is reduced, the vacuum pump 103 and the air valve on the ventilation pipe 104 are closed, and the heating pipe 101 is started to dry;

[0038] After drying is completed, the air valve on the re-pressurization pipe 105 is opened. At this time, the outside air will enter the drying box 1 through the ventilation pipe 104 and the second filter 204 due to the pressure. At this time, the airflow passes through the rotating shaft 209 and pushes open the second one-way plate 208. In this process, the fan blade 210 will be driven by the airflow and the rotating shaft 209 will drive the scraper to scrape off the dust on the first filter 202 and the second filter 204. Finally, the discharge port below is opened to discharge the material.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A vacuum drying device for rapid drying of lignite, comprising a drying box (1), a heating pipe (101) being buried in the inner wall of the drying box (1), a raw material box (102) being arranged above the drying box (1), a vacuum pump (103) being arranged on one side of the drying box (1), a ventilation pipe (104) being fixedly connected between the vacuum pump (103) and the top of the drying box (1), a re-pressurizing pipe (105) being fixedly connected to the side of the ventilation pipe (104) close to the vacuum pump (103), and air valves being installed on both the re-pressurizing pipe (105) and the ventilation pipe (104); It is characterized in that Also includes: An anti-blocking component (2) is provided at the bottom of the ventilation pipe (104) and on one side close to the vacuum pump (103), and a scattering mechanism (3) is provided at the lower part of the drying box (1); The anti-blocking component (2) comprises a circulation box (201), the circulation box (201) is fixedly connected to the ventilation pipe (104), a partition plate (203) is fixedly connected to the lower part of the circulation box (201), a second filter screen (204) is fixedly connected to the top of the partition plate (203), a first filter screen (202) is fixedly connected to the inside of the ventilation pipe (104) on the side close to the vacuum pump (103), and a first one-way plate (205) is provided inside the ventilation pipe (104) and above the circulation box (201).

2. The vacuum drying equipment for rapid drying of lignite according to claim 1, characterized in that: The second filter screen (204) divides the circulation box (201) into two parts, a debris bin (206) and a circulation bin (207). The first one-way plate (205) is located between the top openings of the debris bin (206) and the circulation bin (207). A slag discharge port is provided at the bottom of the debris bin (206), and a closing plate (211) is provided below the slag discharge port.

3. A vacuum drying device for rapid drying of lignite according to claim 2, characterized in that: The top of the circulation bin (207) is rotatably connected to a second one-way plate (208), and a limiting block fixedly connected to the circulation box (201) is overlapped below the second one-way plate (208).

4. The vacuum drying equipment for rapid drying of lignite according to claim 1, characterized in that: The first filter screen (202) and the second filter screen (204) are both rotatably connected to a rotating shaft (209), the other end of the rotating shaft (209) is fixedly connected to a fan blade (210), the side of the rotating shaft (209) is fixedly connected to a scraper, the end of the ventilation pipe (104) extending into the interior of the drying box (1) is sleeved with a third filter screen (212), and the first one-way plate (205) is rotatably connected to the ventilation pipe (104).

5. The vacuum drying equipment for rapid drying of lignite according to claim 1, characterized in that: The dispersing mechanism (3) comprises rotating rods (301) symmetrically arranged at the lower part of the drying box (1); the ends of the two rotating rods (301) close to each other are fixedly connected to a first gear (305); the first gear (305) is meshingly connected to a second gear (306); a protective frame (304) is arranged outside the second gear (306) and the first gear (305); the bottom of the protective frame (304) is fixedly connected to the drying box (1); and the rotating rods (301) are fixedly connected to a first stirring rod (303).

6. The vacuum drying equipment for rapid drying of lignite according to claim 5, characterized in that: A screen (309) is fixedly connected to the upper part of the interior of the drying box (1); a vertical rod (307) is connected to the middle of the screen (309); a plurality of second stirring rods (308) are fixedly connected to the vertical rod (307); the vertical rod (307) is fixedly connected to a horizontal rod (310) after passing through the screen (309); and one of the rotating rods (301) is fixedly connected to a first motor (302).

7. The vacuum drying equipment for rapid drying of lignite according to claim 6, characterized in that: The bottom surface of the cross bar (310) is fixedly connected to a plurality of scraping columns (312), the top surface of the cross bar (310) is fixedly connected to a scraping rod (311), the bottom end of the vertical rod (307) passes through the second gear (306) and is rotatably connected to the protection frame (304), and the vertical rod (307) is fixedly connected to the second gear (306).

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