Air-swept drying mill for preparing pulverized coal

Abstract

The utility model discloses an air-swept drying mill for pulverized coal preparation, which relates to the technical field of air-swept coal mills and comprises a rotary body, a discharge port is arranged at one end of the rotary body, a feed port is arranged at the other end of the rotary body, and a heat absorption mechanism is connected onto the discharge port and comprises a first bin body fixedly mounted on the discharge port. A heat absorption pipeline is fixedly installed in the first bin body, a cleaning scraper is movably installed on the heat absorption pipeline, a gas notch is formed in the cleaning scraper, an electric push rod is fixedly installed at the upper end of the first bin body, a cooling water bin is arranged at the lower end of the electric push rod, and a heat release mechanism is connected to the rotary sealing cover. The air-swept drying mill is used for preparing the pulverized coal. High-temperature waste gas exhausted by the rotary body can be used for preheating hot air entering the rotary body, energy consumption is reduced, and the electric push rod can drive the cleaning scraper to move downwards along the heat absorption pipeline, so that pulverized coal on the surface of the heat absorption pipeline is scraped, and the heat exchange efficiency of the heat absorption pipeline is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air-swept coal mills, in particular to an air-swept drying mill for preparing coal powder. Background Art

[0002] Coal is an important raw material for large coal-consuming enterprises such as cement plants, power plants, and steel mills. In order to improve combustion efficiency, it needs to be ground into powder before use. The air-swept drying mill is one of the main equipment in cement plants. The air-swept drying mill is also called an air-swept coal mill. It is mainly composed of a feeding device, a main bearing, a rotating body, a transmission device, a discharging device, a high-pressure starting device, and a lubrication system.

[0003] Publication number CN215197330U discloses a coal powder air-sweeping mill for cement production, comprising a machine body, a mounting plate installed below the machine body, a rotation drive mechanism installed between the mounting plate and the machine body, operating chambers installed at both ends of the machine body at the top of the mounting plate, both operating chambers are rotatably connected to the machine body, a rotating rod is rotatably connected between the two operating chambers, the rotating rod is located inside the machine body, and at least one rotating blade is installed at equal distances on the surface wall of the rotating rod.

[0004] The above device uses the hot air generated by the hot air device to dry the coal powder. The high-temperature exhaust gas after drying is directly discharged into the atmosphere through the outlet pipe. The discharged high-temperature exhaust gas and coal powder contain a large amount of heat, and direct discharge will cause heat waste. Utility Model Content

[0005] The purpose of the utility model is to provide an air-swept drying mill for preparing coal powder, so as to solve the problem in the prior art that directly discharging high-temperature exhaust gas easily causes heat waste.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an air-swept drying mill for coal powder preparation, comprising a rotating body, one end of the rotating body is provided with a discharge port, the other end of the rotating body is provided with a feed port, the feed port is rotatably connected to a rotary sealing cover, the rotary sealing cover is connected to a feeding pipe, the discharge port is connected to a heat absorption mechanism, the heat absorption mechanism comprises a first bin body fixedly mounted on the discharge port, a heat absorption pipe is fixedly mounted in the first bin body, a cleaning scraper is movably mounted on the heat absorption pipe, a gas notch is opened on the cleaning scraper, an electric push rod is fixedly mounted on the upper end of the first bin body, a cooling water tank is provided at the lower end of the electric push rod, the rotary sealing cover is connected to a heat release mechanism, the heat release mechanism comprises a hot air pipe fixed on the rotary sealing cover, the hot air pipe is connected to a second bin body, a heat release pipe is fixedly mounted in the second bin body, the heat release pipe is connected to a connecting pipe, and the heat release pipe and the heat absorption pipe are connected together through a connecting pipe.

[0007] Preferably, connecting legs are provided on both sides of the cleaning scraper, a water inlet and a water outlet are provided on the cooling water bin, the first bin body is connected to the rotating body through the outlet, the feeding pipe is connected to the feeding port through a rotating sealing cover, and the feeding pipe can transport the coal blocks into the rotating body.

[0008] Preferably, a movable hole is provided on the cleaning scraper, and the cleaning scraper is movably mounted on the heat absorbing pipe through the movable hole. When the cleaning scraper moves along the heat absorbing pipe, it will scrape off the coal powder on the surface of the heat absorbing pipe.

[0009] Preferably, the cleaning scraper is fixed to the output end of the electric push rod through a connecting leg, a movable hole is opened on the cooling water tank, the output end of the electric push rod passes through the cooling water tank through the movable hole, the water inlet and the water outlet are connected to water pipes, and the electric push rod can drive the cleaning scraper to move up and down.

[0010] Preferably, an air inlet is provided at the upper end of the second warehouse body, an air outlet is provided at the lower end of the second warehouse body, and the hot air duct is connected to the second warehouse body through the air outlet.

[0011] Preferably, a through hole is provided on the second storage body, and the communication pipe extends out of the second storage body through the through hole.

[0012] Preferably, one end of the connecting pipe is connected to the heat absorption pipe, and the other end of the connecting pipe is connected to the second warehouse body; one end of the hot air pipe is connected to the rotating body, and the other end of the hot air pipe is connected to the second warehouse body.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. In this application, the hot air discharged from the rotor will exchange heat with the heat absorption pipe, thereby increasing the temperature of the heat transfer fluid inside the heat absorption pipe. The high-temperature heat transfer fluid is transported to the heat release pipe through a liquid pump, so that the heat transfer fluid in the heat release pipe exchanges heat with the hot air entering the rotor, thereby utilizing the high-temperature exhaust gas discharged from the rotor to preheat the hot air entering the rotor, thereby reducing energy consumption.

[0015] 2. In this application, the electric push rod can drive the cleaning scraper to move downward along the heat absorbing pipe, thereby scraping off the coal powder on the surface of the heat absorbing pipe, ensuring the heat exchange efficiency of the heat absorbing pipe, and when the electric push rod is retracted, its output end will exchange heat with the cooling water in the cooling water tank, which will reduce the temperature of the output end of the electric push rod, prevent the electric push rod from overheating and damage, and extend the service life of the electric push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2This is a schematic diagram of the heat absorption mechanism of the present utility model;

[0018] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle;

[0019] Figure 4 It is a schematic diagram of the heat release mechanism of the present utility model.

[0020] Numbers in the figure: 1. Rotating body; 2. Discharge port; 3. Feed port; 4. Rotary sealing cover; 5. Feeding pipe; 6. Heat absorption mechanism; 601. First bin body; 602. Electric push rod; 603. Cooling water bin; 604. Cleaning scraper; 605. Heat absorption pipe; 606. Connecting foot; 607. Water inlet; 608. Water outlet; 609. Gas gap; 7. Heat release mechanism; 701. Second bin body; 702. Heat release pipe; 703. Connecting pipe; 704. Air inlet; 705. Air outlet; 706. Hot air pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] like Figure 1 and Figure 2 As shown, the utility model provides a technical solution of an air-swept drying mill for coal powder preparation, including a rotor 1, a discharge port 2 at one end of the rotor 1, a feed port 3 at the other end of the rotor 1, a rotary sealing cover 4 rotatably connected to the feed port 3, a feeding pipe 5 connected to the rotary sealing cover 4, a heat absorption mechanism 6 connected to the discharge port 2, and a heat release mechanism 7 connected to the rotary sealing cover 4. The high-temperature exhaust gas discharged from the rotor 1 can be used to preheat the hot air entering the rotor 1, thereby reducing energy consumption, and the electric push rod 602 can drive the cleaning scraper 604 to move downward along the heat absorption pipe 605, thereby scraping off the coal powder on the surface of the heat absorption pipe 605, thereby ensuring the heat exchange efficiency of the heat absorption pipe 605.

[0023] like Figure 2 and Figure 3As shown, the heat absorption mechanism 6 includes a first bin body 601 fixedly mounted on the discharge port 2, a heat absorption pipe 605 fixedly mounted in the first bin body 601, a cleaning scraper 604 movably mounted on the heat absorption pipe 605, a gas notch 609 is opened on the cleaning scraper 604, an electric push rod 602 is fixedly mounted on the upper end of the first bin body 601, a cooling water tank 603 is provided at the lower end of the electric push rod 602, connecting legs 606 are provided on both sides of the cleaning scraper 604, a water inlet 607 and a water outlet 608 are provided on the cooling water tank 603, the first bin body 601 is connected to the rotating body 1 through the discharge port 2, and the feeding pipe 5 is connected to the feed port 3 through the rotating sealing cover 4.

[0024] Specifically, the electric push rod 602 can drive the cleaning scraper 604 to move downward along the heat absorbing pipe 605, thereby scraping off the coal powder on the surface of the heat absorbing pipe 605, ensuring the heat exchange efficiency of the heat absorbing pipe 605, and when the electric push rod 602 is retracted, its output end will exchange heat with the cooling water in the cooling water tank 603, which will reduce the temperature of the output end of the electric push rod 602, prevent the electric push rod 602 from overheating and damage, and extend the service life of the electric push rod 602.

[0025] like Figure 1 and Figure 4 As shown, the heat release mechanism 7 includes a hot air duct 706 fixed on the rotating sealing cover 4, the hot air duct 706 is connected to the second bin body 701, a heat release duct 702 is fixedly installed in the second bin body 701, the heat release duct 702 is connected to the connecting duct 703, the upper end of the second bin body 701 is provided with an air inlet 704, and the lower end of the second bin body 701 is provided with an air outlet 705.

[0026] Specifically, the hot air discharged from the rotor 1 will exchange heat with the heat absorption pipe 605, thereby increasing the temperature of the heat transfer liquid inside the heat absorption pipe 605, and the high-temperature heat transfer liquid is transported to the heat release pipe 702 through the liquid pump, so that the heat transfer liquid in the heat release pipe 702 exchanges heat with the hot air entering the rotor 1, thereby using the high-temperature exhaust gas discharged from the rotor 1 to preheat the hot air entering the rotor 1, reducing energy consumption.

[0027] Working principle: When in use, coal blocks are input into the rotor 1 through the feed port 3. During the rotation of the rotor 1, the coal blocks will be ground into coal powder, and during the rotation of the rotor 1, hot air will enter the rotor 1 through the hot air pipe 706. The coal powder and the hot air exchange heat in the rotor 1, and the ground fine powder is brought out of the rotor 1 through the discharge port 2 by the hot air. The hot air discharged from the rotor 1 will exchange heat with the heat absorption pipe 605, thereby increasing the temperature of the heat transfer liquid inside the heat absorption pipe 605. After the temperature of the heat transfer liquid inside the heat absorption pipe 605 is increased, the high-temperature heat transfer liquid can be transported to the heat release pipe 702 through the liquid pump. When the hot air enters the rotor 1, it will first pass through the second bin 701, so that the heat transfer liquid in the heat release pipe 702 and the heat transfer liquid entering the rotor The hot air in the rotating body 1 is exchanged with the hot air, so that the high-temperature exhaust gas discharged by the rotating body 1 is used to preheat the hot air entering the rotating body 1, thereby reducing energy consumption. After long-term use, the electric push rod 602 can be controlled to extend. After the electric push rod 602 is extended, it will drive the cleaning scraper 604 to move downward along the heat absorption pipe 605, thereby scraping off the coal powder on the surface of the heat absorption pipe 605, ensuring the heat exchange efficiency of the heat absorption pipe 605, and when the electric push rod 602 is retracted, the cooling water can be transported to the cooling water tank 603 through the water inlet 607. When the electric push rod 602 is retracted, its output end will exchange heat with the cooling water in the cooling water tank 603, which will reduce the temperature of the output end of the electric push rod 602 and prevent the electric push rod 602 from being overheated and damaged.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An air-swept drying mill for preparing pulverized coal, comprising a rotor (1), wherein one end of the rotor (1) is provided with a discharge port (2), and the other end of the rotor (1) is provided with a feed port (3), wherein a rotary sealing cover (4) is rotatably connected to the feed port (3), and a feeding pipe (5) is connected to the rotary sealing cover (4), and wherein: The discharge port (2) is connected to a heat absorption mechanism (6), the heat absorption mechanism (6) comprises a first bin body (601) fixedly mounted on the discharge port (2), a heat absorption pipe (605) fixedly mounted in the first bin body (601), a cleaning scraper (604) movably mounted on the heat absorption pipe (605), a gas notch (609) being provided on the cleaning scraper (604), an electric push rod (602) fixedly mounted on the upper end of the first bin body (601), and a heat absorption pipe (605) fixedly mounted in the first bin body (601). ), a cooling water tank (603) is provided at the lower end of the electric push rod (602), a heat release mechanism (7) is connected to the rotating sealing cover (4), the heat release mechanism (7) comprises a hot air duct (706) fixed on the rotating sealing cover (4), the hot air duct (706) is connected to a second bin body (701), a heat release pipe (702) is fixedly installed in the second bin body (701), and the heat release pipe (702) is connected to a connecting pipe (703).

2. The air-swept drying mill for preparing pulverized coal according to claim 1, characterized in that: Connecting legs (606) are provided on both sides of the cleaning scraper (604); a water inlet (607) and a water outlet (608) are provided on the cooling water bin (603); the first bin body (601) is connected to the rotating body (1) through the outlet (2); and the feeding pipe (5) is connected to the feeding port (3) through a rotating sealing cover (4).

3. The air-swept drying mill for preparing pulverized coal according to claim 2, characterized in that: A movable hole is provided on the cleaning scraper (604), and the cleaning scraper (604) is movably mounted on the heat absorbing pipe (605) through the movable hole.

4. The air-swept drying mill for preparing pulverized coal according to claim 3, characterized in that: The cleaning scraper (604) is fixed to the output end of the electric push rod (602) via a connecting leg (606); a movable hole is provided on the cooling water tank (603); the output end of the electric push rod (602) passes through the cooling water tank (603) via the movable hole; and water pipes are connected to the water inlet (607) and the water outlet (608).

5. The air-swept drying mill for preparing pulverized coal according to claim 4, characterized in that: An air inlet (704) is provided at the upper end of the second silo (701), and an air outlet (705) is provided at the lower end of the second silo (701).

6. The air-swept drying mill for preparing pulverized coal according to claim 1, characterized in that: The second storage body (701) is provided with a through hole, and the connecting pipe (703) extends out of the second storage body (701) through the through hole.

7. The air-swept drying mill for preparing pulverized coal according to claim 1, characterized in that: One end of the communication pipe (703) is connected to the heat absorption pipe (605), and the other end of the communication pipe (703) is connected to the second warehouse (701). One end of the hot air pipe (706) is connected to the rotating body (1), and the other end of the hot air pipe (706) is connected to the second warehouse (701).

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