Blending combustion mixer for coal with low ash fusion point

Abstract

The utility model discloses a low-ash-fusion-point coal blending combustion blender mixer, which relates to the technical field of coal-fired power plants and comprises a blending tank body, a motor is arranged on one side of the blending tank body, a feeding mechanism is arranged right above the blending tank body, and the feeding mechanism conveys low-ash-fusion-point coal and high-ash-fusion-point coal in proportion. Coal mixing blades are arranged in the material mixing tank body at equal intervals, a feeding mechanism is arranged in the material mixing tank body, and the feeding mechanism injects and sprays flame-retardant liquid, so that a certain amount of flame retardant is sprayed while the low-ash-fusion-point coal type and the high-ash-fusion-point coal type are mixed; and the combustion efficiency of coal types is improved. The low-ash-fusion-point coal and the combustion improver are fully mixed through the horizontally-arranged mixing tank body, the mixing device has the advantage of being uniform in mixing, the thermal efficiency value of fire coal is effectively guaranteed, and the combustion improver sprayed out of the spraying pipe can be uniformly sprayed into coal briquettes.

Description

Technical Field

[0001] The utility model relates to the technical field of coal-fired power plants, in particular to a low-ash fusion point coal blending mixer. Background Art

[0002] The quality of coal currently entering the furnaces of many large coal-fired power plants is far from the designed coal type, which also includes some low-ash melting point coal types with low standard coal unit price. The burning of low-ash melting point coal types will cause coking problems to boilers to varying degrees. In particular, with the reduction of nitrogen oxide emission standards for coal-fired power plant boilers, low-nitrogen combustion methods such as air staging and fuel staging will further promote the conversion of mineral elements in coal into low-ash melting point compounds during the combustion process.

[0003] During the mixing process, the mixer mainly mixes different types of coal. However, due to certain differences in low ash melting point coal, simply adding high melting point coal cannot improve the combustion efficiency. It is necessary to add flame retardants, which increases the time and steps required for the blending of low ash melting point coal. Summary of the invention

[0004] The purpose of the utility model is to provide a low ash fusion point coal blending mixer to solve the above defects caused by the prior art.

[0005] A low ash melting point coal blending mixer comprises a mixing tank body, a motor is arranged on one side of the mixing tank body, a feeding mechanism is arranged directly above the mixing tank body, the feeding mechanism conveys low ash melting point coal and high ash melting point coal in proportion to complete the coal mixing process, coal mixing blades are arranged at equal intervals inside the mixing tank body, a feeding mechanism is arranged inside the mixing tank body, the feeding mechanism injects and sprays liquid flame retardant liquid, and then sprays a certain amount of flame retardant while mixing the low ash melting point coal and the high ash melting point coal to improve the combustion efficiency of the coal.

[0006] Preferably, the feeding mechanism includes a feed through hole, a side baffle, a conveyor belt and a brush roller, the feed through hole is opened through the top of the mixing tank body, the top of the mixing tank body is symmetrically connected to the side baffle, the outer axis of the side baffle is connected to the conveyor belt, and a brush roller is arranged directly below the conveyor belt.

[0007] Preferably, the brush roller contacts the outer side of the conveyor belt through side baffles arranged on both sides.

[0008] Preferably, the feeding mechanism includes a liquid storage water tray, liquid mixing blades, a spray pipe, a liquid injection pipe fitting and a rotating shaft, the outer side of the rotating shaft is respectively connected to the liquid mixing blades and the coal mixing blades, the liquid storage water tray is installed on one side of the mixing tank body, the liquid injection pipe fitting is provided on one side of the liquid storage water tray, and the other side of the liquid storage water tray is provided with a spray pipe.

[0009] Preferably, the output end of the motor is connected to a rotating shaft.

[0010] Preferably, a feeding pipe is symmetrically connected through the bottom end of the mixing tank.

[0011] Preferably, the liquid injection pipe is connected to one end of the spray pipe through a liquid storage water tray penetrating one side.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] 1. During use, the bottom of the conveyor belt is cleaned by the brush roller arranged at the bottom. During the conveying process, the surface of the conveyor belt is brushed and cleaned by the brush roller arranged at the bottom to prevent the debris on the coal block from getting stuck on the surface of the conveyor belt and the connecting end shaft. The low ash melting point coal and the combustion aid are fully mixed through the horizontal mixing tank, and the mixing is uniform, which effectively guarantees the thermal efficiency of the coal.

[0014] 2. When the coal mixing blades are driven to rotate by the rotating shaft, the flow rate of the liquid is accelerated to initially add flame retardant to the interior of the low ash melting point coal, and then high ash coal is added to mix the high ash coal and the low ash melting point coal in proportion. The liquid and coal are mixed simultaneously to improve the efficiency of the mixer during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the side structure of the mixing tank in the utility model.

[0017] Figure 3 It is a schematic diagram of the front section structure of the mixing tank in the utility model.

[0018] Figure 4 It is a schematic diagram of the top view of the mixing tank body in the utility model.

[0019] Figure 5 It is a schematic diagram of the structure of the coal mixing blade itself in the utility model.

[0020] in:

[0021] 1. Mixing tank; 2. Motor; 3. Feeding hole; 4. Side baffle; 5. Conveyor belt; 6. Feeding mechanism; 7. Liquid storage tray; 8. Liquid mixing blades; 9. Coal mixing blades; 10. Feeding pipe; 11. Spray pipe; 12. Feeding mechanism; 13. Brush roller; 14. Liquid injection pipe fittings; 15. Rotating shaft. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] like Figures 1 to 5 As shown, a low ash melting point coal blending mixer comprises a mixing tank body 1, a motor 2 is arranged on one side of the mixing tank body 1, a feeding mechanism 6 is arranged directly above the mixing tank body 1, the feeding mechanism 6 conveys low ash melting point coal and high ash melting point coal in proportion, thereby completing the coal mixing process, coal mixing blades 9 are arranged at equal intervals inside the mixing tank body 1, a feeding mechanism 12 is arranged inside the mixing tank body 1, the feeding mechanism 12 injects and sprays liquid flame retardant liquid, and then while mixing the low ash melting point coal and the high ash melting point coal, a certain amount of flame retardant is sprayed to improve the combustion efficiency of the coal.

[0024] In this embodiment, the feeding mechanism 6 includes a feeding hole 3, a side baffle 4, a conveyor belt 5 and a brush roller 13. The feeding hole 3 is opened through the top of the mixing tank body 1. The top of the mixing tank body 1 is symmetrically connected with the side baffle 4. The outer axis of the side baffle 4 is connected with the conveyor belt 5. A brush roller 13 is arranged directly below the conveyor belt 5. Different types of coal are transported by the conveyor belt 5, and different types of coal are mixed.

[0025] In this embodiment, the brush roller 13 contacts the outer side of the conveyor belt 5 through the side baffles 4 arranged on both sides, and the bottom end of the conveyor belt 5 is cleaned by the stationary brush roller 13 to prevent dust from adhering to the surface of the conveyor belt 5.

[0026] In this embodiment, the feeding mechanism 12 includes a liquid storage water tray 7, a liquid mixing blade 8, a spray pipe 11, a liquid injection pipe fitting 14 and a rotating shaft 15. The outer sides of the rotating shaft 15 are respectively connected to the liquid mixing blade 8 and the coal mixing blade 9. The liquid storage water tray 7 is installed on one side of the mixing tank body 1. The liquid injection pipe fitting 14 is provided on one side of the liquid storage water tray 7, and the spray pipe 11 is provided on the other side of the liquid storage water tray 7. The combustion aid is discharged through the liquid storage water tray 7 and sprayed into the interior of the low ash melting point coal.

[0027] In this embodiment, the output end of the motor 2 is connected to a rotating shaft 15, and the low-ash melting point coal and the high-ash melting point coal are mixed through the rotating shaft 15.

[0028] In this embodiment, a material discharge pipe 10 is symmetrically connected to the bottom end of the mixing tank body 1, and the material is directly discharged through the material discharge pipe 10, thereby accelerating the material discharge efficiency.

[0029] In this embodiment, the injection pipe 14 is connected to one end of the spray pipe 11 through a liquid storage water tray 7 that penetrates one side, and the flame retardant is sprayed into the coal blocks through the liquid storage water tray 7 to improve the combustion rate of the coal blocks.

[0030] The practical application of this low ash fusion point coal blending mixer includes the following work contents:

[0031] Step 1: During use, first place the low-ash melting point coal on the surface of the conveyor belt 5, use the conveyor belt 5 to directly inject the coal into the feed through hole 3 opened at the top to introduce it into the mixing tank 1, and open the injection pipe 14 on one side to introduce the combustion aid into the liquid storage water tray 7, and drive the mixing blade 8 to rotate by the motor 2 to accelerate the flow rate of the liquid, and use the spray pipe 11 set on one side to spray the flame retardant directly into the low-ash melting point coal to improve the combustion rate inside the low-ash melting point coal;

[0032] Step 2: Then, place the high ash melting point coal on the surface of the conveyor belt 5, and use the conveyor belt 5 to directly inject the coal into the interior of the mixing tank 1 through the feed through hole 3 opened at the top, and stack the high ash melting point coal and the low ash melting point coal. Use the motor 2 to drive the coal mixing blade 9 to rotate, and use the coal mixing blade 9 to mix the high ash melting point coal and the low ash melting point coal to complete the mixing ratio of different types of coal;

[0033] Step 3: When conveying the coal, the bottom end of the conveyor belt 5 is cleaned by the brush roller 13 arranged at the bottom end. When the conveyor belt 5 is conveying the coal, the residual coal powder on the surface of the conveyor belt 5 is cleaned by the brush roller 13. After the coal is mixed, the discharge pipe 10 arranged below is opened to discharge the internal coal of the mixing tank 1 directly out of the mixing tank 1, and the coal is repeatedly moved by the coal mixing blades 9 to accelerate the coal discharge speed.

[0034] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. Low ash fusion point coal blending mixer, characterized by: The invention comprises a mixing tank body (1), a motor (2) is arranged on one side of the mixing tank body (1), a feeding mechanism (6) is arranged directly above the mixing tank body (1), the feeding mechanism (6) conveys low ash melting point coal and high ash melting point coal in proportion, thereby completing the coal mixing process, coal mixing blades (9) are arranged at equal intervals inside the mixing tank body (1), a feeding mechanism (12) is arranged inside the mixing tank body (1), the feeding mechanism (12) injects and sprays liquid flame retardant liquid, and then sprays a certain amount of flame retardant while mixing the low ash melting point coal and the high ash melting point coal, thereby improving the combustion efficiency of the coal.

2. The low ash fusion point coal blending mixer according to claim 1, characterized in that: The feeding mechanism (6) comprises a feeding hole (3), a side baffle (4), a conveyor belt (5) and a brush roller (13); the feeding hole (3) is opened through the top of the mixing tank body (1); the top of the mixing tank body (1) is symmetrically connected to the side baffle (4); the outer shaft of the side baffle (4) is connected to the conveyor belt (5); and the brush roller (13) is arranged directly below the conveyor belt (5).

3. The low ash fusion point coal blending mixer according to claim 2, characterized in that: The brush roller (13) contacts the outer side of the conveyor belt (5) through side baffles (4) arranged on both sides.

4. The low ash fusion point coal blending mixer according to claim 1, characterized in that: The feeding mechanism (12) comprises a liquid storage water tray (7), a liquid mixing blade (8), a spray pipe (11), a liquid injection pipe fitting (14) and a rotating shaft (15); the outer side of the rotating shaft (15) is respectively connected to the liquid mixing blade (8) and the coal mixing blade (9); the liquid storage water tray (7) is installed on one side of the mixing tank body (1); the liquid injection pipe fitting (14) is provided on one side of the liquid storage water tray (7); and the spray pipe (11) is provided on the other side of the liquid storage water tray (7).

5. The low ash fusion point coal blending mixer according to claim 1, characterized in that: The output end of the motor (2) is connected to a rotating shaft (15).

6. The low ash fusion point coal blending mixer according to claim 1, characterized in that: A material discharge pipe (10) is symmetrically connected and penetrated through the bottom end of the mixing tank body (1).

7. The low ash fusion point coal blending mixer according to claim 4, characterized in that: The liquid injection pipe (14) is connected to one end of the spray pipe (11) through a liquid storage water tray (7) penetrating one side.

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