Drying system for moisture control of clean coal

Abstract

The utility model discloses a drying system for moisture control of clean coal, belongs to the field of coking mechanical equipment, and solves the problems of increased wastewater, high energy consumption and poor finished product quality caused by high moisture of coal as fired in the prior art. The device mainly comprises a hopper and a conveying belt II, a quantifying mechanism is arranged on the hopper, the hopper is connected with a bucket elevator through a conveying belt I, the bucket elevator is connected with a drying machine through a pipeline I, a moisture discharging opening is formed in the upper portion of the drying machine, the moisture discharging opening is connected to a water film dust remover through a pipeline II, and a water tank is arranged in the water film dust remover. And an induced draft fan and a circulating water pump are arranged in the water dust scrubber. According to the utility model, the drying machine and the water dust scrubber are mainly matched, the drying machine is used for drying materials, and the materials which are qualified in humidity regulation are conveyed to the storage bin, so that the coke quality is improved, the nitrogen oxide concentration is reduced, and the wastewater treatment capacity is reduced.

Description

Technical Field

[0001] The utility model relates to the field of coking mechanical equipment, in particular to a drying system for clean coal moisture adjustment. Background Art

[0002] For normal and stable production of coke ovens, coal cake tamping operation requires that the moisture content of coal entering the furnace be controlled at about 10%. However, due to the high moisture content of the clean coal entering the factory, the actual moisture content of the coal entering the furnace is often around 12%, or even as high as 13%-14%. The application with publication number CN208998500U in the prior art discloses a disc dryer for pulverized coal moisture adjustment, which controls the moisture content of coal entering the furnace within a reasonable indicator range. However, the dryer cannot enter the dryer in a quantitative manner, which is prone to blockage, and the treated wastewater is difficult to reuse.

[0003] There are many unfavorable factors for excessive moisture content of coal entering the furnace, as follows: First, due to the high moisture content of coal entering the furnace, it is more difficult to tamp the coal cakes, and coal cake peeling or coal collapse often occurs; second, due to the high moisture content of coal entering the furnace, the heat consumption of coal cakes in the process of generating coke increases, and the temperature of the vertical fire channel is forced to increase, which not only increases the amount of coke oven gas required for combustion, but also wastes the gas, and the increase in temperature causes the increase in the amount of nitrogen oxides generated, and the concentration of nitrogen oxides in the tail gas after combustion in the chimney exceeds the standard; third, due to the high moisture content of coal entering the furnace, the coke cannot mature within the specified coking time, not only the quality of coke deteriorates, but also the coking time must be extended, which not only makes it difficult to complete the production task, but also shortens the life of the coke oven; fourth, due to the high moisture content of coal entering the furnace, the amount of coking wastewater increases, which greatly increases the cost of coking wastewater treatment, and the treated wastewater is difficult to reuse. Because of the above many unfavorable factors of high moisture content of coal entering the furnace, most coking plants adopt different coal moisture adjustment processes and equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a drying system for clean coal moisture adjustment to solve the problem of high moisture content of coal entering the furnace in the prior art, which leads to increased wastewater, high energy consumption and poor quality of finished products. At the same time, it solves the problem of easy clogging and difficulty in dust removal in wet coal drying technology.

[0005] The utility model is realized by the following technical solutions:

[0006] A drying system for clean coal moisture adjustment comprises a feeder, wherein the feeder comprises a hopper and a conveyor belt II, a quantitative mechanism is arranged on the hopper, the hopper is connected to a bucket elevator through a conveyor belt I, the bucket elevator is connected to a dryer through a pipeline I, a moisture discharge port is arranged above the dryer, the moisture discharge port is connected to a water film dust collector through a pipeline II, a water tank is arranged in the water film dust collector, and an induced draft fan and a circulating water pump are arranged in the water film dust collector.

[0007] Furthermore, the dryer is connected to a steam pipeline, and the dryer is connected to a hot water tank, and a water pump is arranged in the hot water tank.

[0008] Furthermore, the quantitative mechanism includes a weighing sensor, a control valve and a bracket. The hopper is arranged on the bracket. A weighing sensor is arranged between the bracket and the hopper. A control valve is arranged under the hopper. The weighing sensor and the control valve are electrically connected to a controller.

[0009] Furthermore, a discharge port is provided at the bottom of the dryer, a conveyor belt II is provided below the discharge port, and the conveyor belt II is connected to the storage bin.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. The utility model adopts quantitative mechanism and bucket elevator to cooperate with feeding, so as to avoid blocking. The heat source of the dryer adopts saturated water vapor transmitted by the treated steam pipeline. The water vapor becomes saturated water vapor after passing through the overheating elimination device and then enters the dryer to provide heat source. The condensed water after passing through the dryer enters the hot water tank and is discharged out of the boundary by the hot water pump. The heat transfer efficiency is high, no waste water is generated, and it can be reused for a second time.

[0012] 2. The utility model adopts a dryer and a water film dust collector. The dryer dries the material and transports the qualified moisture-adjusted material to the storage bin, thereby improving the quality of coke, reducing the concentration of nitrogen oxides, and reducing the amount of wastewater treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1. hopper; 2. conveyor belt Ⅰ; 3. bucket elevator; 4. dryer; 5. pipeline Ⅱ; 6. water film dust collector; 7. hot water tank; 8. conveyor belt Ⅱ; 9. pipeline Ⅰ; 10. control valve; 11. weighing sensor. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0016] The utility model is further described below in conjunction with the accompanying drawings.

[0017] Example 1: A drying system for clean coal moisture control, such as Figure 1 As shown, it includes a feeder, the feeder includes a hopper 1 and a conveyor belt II8, a quantitative mechanism is provided on the hopper 1, the hopper 1 is connected to a bucket elevator 3 through a conveyor belt I2, the bucket elevator 3 is connected to a dryer 4 through a pipeline I9, the dryer 4 is a disc-type continuous dryer 4, a dehumidification port is provided on the top, the dehumidification port is connected to a water film dust collector 6 through a pipeline II5, a water tank is provided in the water film dust collector 6, and a draft fan and a circulating water pump are provided in the water film dust collector 6. The quantitative mechanism is used to avoid material blockage.

[0018] Embodiment 2, a drying system for clean coal moisture adjustment, the dryer 4 is connected to a steam pipeline, the dryer 4 is connected to a hot water tank 7, and a water pump is arranged in the hot water tank 7; the quantitative mechanism includes a weighing sensor 11, a control valve 10 and a bracket, the hopper 1 is arranged on the bracket, a weighing sensor 11 is arranged between the bracket and the hopper 1, a control valve 10 is arranged below the hopper 1, and the weighing sensor 11 and the control valve 10 are electrically connected to a controller; the bottom of the dryer 4 is provided with a discharge port, and a conveyor belt II 8 is arranged below the discharge port, and the conveyor belt II 8 is connected to the storage bin. The rest is the same as embodiment 1. The heat source of the dryer 4 adopts saturated water vapor transmitted through a treated steam pipeline. The water vapor becomes saturated water vapor after passing through an overheating elimination device and then enters the dryer 4 to provide a heat source. The condensed water after passing through the dryer 4 enters the hot water tank 7 and is discharged out of the boundary by the hot water pump. The heat transfer efficiency is high, no waste water is generated, and it can be reused for a second time.

[0019] When the utility model is in use, the wet material from the previous process is transported to the silo, and then the hopper 1 discharges the material to the conveyor belt Ⅰ2 through the quantitative mechanism, and is added to the bucket elevator 3 by the conveyor belt Ⅰ2, and then the bucket elevator 3 continuously adds quantitative material from the top of the dryer 4 to perform the drying operation. After the material is humidified by the dryer 4 and meets the requirements, it is discharged from the lower discharge port and transported to the storage bin.

[0020] During the humidity adjustment process, moisture is discharged from the moisture outlet at the top of the dryer 4 and enters the water film dust collector 6. The water film dust collector 6 has its own water tank, which is connected to the circulation line. The circulation line is provided with a circulation water pump, and the circulation water pump is used for repeated absorption. The top of the water film dust collector 6 is provided with an induced draft fan to discharge the non-condensable gas. The heat source of the disc continuous dryer 4 uses treated saturated water vapor. The water vapor transported by the steam pipeline is treated to become saturated water vapor and then enters the disc continuous dryer 4. The condensed water after passing through the dryer 4 enters the hot water tank 7 and is discharged out of the boundary by the hot water pump.

[0021] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made within the scope of this application should still fall within the scope of the present invention.

Claims

1. A drying system for clean coal moisture adjustment, comprising a feeder, characterized in that: The feeder comprises a hopper (1) and a conveyor belt II (8). The hopper (1) is provided with a quantitative mechanism. The hopper (1) is connected to a bucket elevator (3) via a conveyor belt I (2). The bucket elevator (3) is connected to a dryer (4) via a pipeline I (9). A dehumidification port is provided above the dryer (4). The dehumidification port is connected to a water film dust collector (6) via a pipeline II (5). A water tank is provided in the water film dust collector (6). An induced draft fan and a circulating water pump are provided in the water film dust collector (6).

2. The drying system for clean coal moisture control according to claim 1, characterized in that: The dryer (4) is connected to a steam pipeline, and the dryer (4) is connected to a hot water tank (7), and a water pump is arranged in the hot water tank (7).

3. The drying system for clean coal moisture control according to claim 1, characterized in that: The quantitative mechanism comprises a weighing sensor (11), a control valve (10) and a bracket. The hopper (1) is arranged on the bracket. The weighing sensor (11) is arranged between the bracket and the hopper (1). The control valve (10) is arranged below the hopper (1). The weighing sensor (11) and the control valve (10) are both electrically connected to a controller.

4. The drying system for clean coal moisture control according to claim 1, characterized in that: The bottom of the dryer (4) is provided with a discharge port, and a conveyor belt II (8) is provided below the discharge port, and the conveyor belt II (8) is connected to the storage bin.

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