A high-concentration coal gasification coal water slurry preparation device

Abstract

The utility model relates to the technical field of coal water slurry preparation, and particularly relates to a high-concentration coal gasification coal water slurry preparation device, which comprises a rod mill, a ball mill, a cyclone separator, a coarse-grained coal water slurry, a fine-grained coal water slurry, a fine grinding device, an ultrafine grinding device, a coal water slurry mixer and a coal water slurry outlet.

Description

Technical Field

[0001] This utility model relates to the field of coal-water slurry preparation technology, specifically to a high-concentration coal gasification coal-water slurry preparation device. Background Technology

[0002] Coal-water slurry is a liquid fuel made by grinding coal, water, and additives. It is a clean and efficient energy utilization method. With the growth of global energy demand and the increasing awareness of environmental protection, coal-water slurry has gradually received widespread attention as an alternative energy source.

[0003] With the development of the coal chemical industry, coal-water slurry gasification technology is increasingly being used to produce syngas, which is then used to produce downstream products such as methanol, ethanol, ethylene glycol, and dimethyl oxalate. In coal-water slurry gasification, the concentration, fluidity, and stability of the slurry directly affect the gasification efficiency of the gasifier. To improve gasification efficiency, many companies use particle size distribution technology to increase the concentration of the coal-water slurry. However, existing particle size distribution technologies involve further fine grinding of the coal slurry after rod mill or ball mill grinding, which contains fine particles. Further fine grinding is meaningless and only increases the load and energy consumption of subsequent fine grinding and / or ultrafine grinding units. Utility Model Content

[0004] The purpose of this invention is to provide a high-concentration coal gasification coal-water slurry preparation device to solve the problems mentioned in the background art. When preparing coal gasification coal-water slurry, this device can reduce the load and energy consumption of the fine grinding device and / or ultrafine grinding device when grinding to prepare a high-concentration coal-water slurry, thus greatly saving production costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-concentration coal gasification coal-water slurry preparation device includes a coal bunker, a belt weighing feeder, a rod mill or ball mill, a hydrocyclone separator, and a fine grinding device. The outlet of the coal bunker is connected to the inlet of the belt weighing feeder via a pipe. The outlet of the belt weighing feeder is connected to the inlet of the rod mill or ball mill via a pipe. The outlet of the rod mill or ball mill is connected to the inlet of the hydrocyclone separator via a pipe. The coarse coal slurry outlet of the hydrocyclone separator is connected to the inlet of the fine grinding device via a pipe. The outlet of the fine grinding device and the fine coal slurry outlet of the hydrocyclone separator are both connected to a premixing tank via pipes.

[0006] Preferably, the belt weighing feeder includes a frame, a conveyor belt mounted on the frame, a drive device for driving the conveyor belt, and a weighing sensor mounted on the conveyor belt.

[0007] Preferably, the cyclone separator includes a separator body, with a feed inlet at the upper part of the side of the separator body, a coarse coal slurry outlet at the lower part, and a fine coal slurry outlet at the upper part.

[0008] Preferably, the fine grinding device is a colloid mill or a vertical sand mill.

[0009] Preferably, the coarse coal slurry outlet of the cyclone separator is also connected to the feed inlet of the ultrafine grinding device via a pipeline, and the discharge outlet of the ultrafine grinding device is connected to the premixing tank via a pipeline.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention, by incorporating a hydrocyclone separator, can separate coal slurry ground by a rod mill or ball mill into coarse and fine coal slurries. The coarse coal slurry then enters a fine grinding device and / or an ultrafine grinding device for further grinding. The ground coal slurry is then mixed with the fine coal slurry to obtain the finished coal slurry. This design allows the fine grinding device and / or ultrafine grinding device to avoid grinding fine coal particles, reducing grinding resistance. Only the coarse coal slurry needs to be ground, greatly reducing the load on the fine grinding device and / or ultrafine grinding device, improving grinding efficiency, reducing energy consumption and production costs, and contributing to improved quality and yield of coal-water slurry. Attached Figure Description

[0011] Figure 1 Here is a schematic diagram of the structure of this utility model; Figure 2 Here is a structural schematic diagram (b) of this utility model; In the diagram: 1-Coal bunker; 2-Belt weighing feeder; 3-Rod mill or ball mill; 4-Cyclone separator; 5-Fine grinding device; 6-Premixing tank; 7-Ultrafine grinding device. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0013] refer to Figure 1 This utility model provides a high-concentration coal gasification coal-water slurry preparation device, including a coal bunker 1, a belt weighing feeder 2, a rod mill or ball mill 3, a hydrocyclone separator 4, and a fine grinding device 5; the outlet of the coal bunker 1 is connected to the inlet of the belt weighing feeder 2 through a pipeline, the coal bunker 1 is used to store raw coal, and the raw coal is transported to the belt weighing feeder 2 through the pipeline.

[0014] The discharge port of the belt weighing feeder 2 is connected to the feed port of the rod mill or ball mill 3 via a pipe. The belt weighing feeder 2 can weigh and measure the raw coal and evenly convey it to the rod mill or ball mill 3. The belt weighing feeder 2 includes a frame, a conveyor belt mounted on the frame, a drive device for driving the conveyor belt, and a weighing sensor mounted on the conveyor belt. The weighing sensor can monitor the weight of the raw coal on the conveyor belt in real time, and the drive device drives the conveyor belt to realize the conveying of raw coal.

[0015] The discharge port of the rod mill or ball mill 3 is connected to the inlet of the hydrocyclone 4 through a pipeline. The rod mill or ball mill 3 is used to perform preliminary grinding of raw coal, grinding the raw coal into coal slurry, and then transporting the coal slurry to the hydrocyclone 4 through a pipeline.

[0016] The coarse coal slurry outlet of the hydrocyclone 4 is connected to the feed inlet of the fine grinding device 5 via a pipeline. The hydrocyclone 4 includes a separator body, with a feed inlet at the upper part of the side of the separator body, a coarse coal slurry outlet at the lower part, and a fine coal slurry outlet at the upper part. The coal slurry enters from the side feed inlet of the hydrocyclone 4 and undergoes centrifugal separation within the hydrocyclone 4. The coarser coal slurry is discharged from the lower coarse coal slurry outlet and enters the fine grinding device 5 for further grinding; the finer coal slurry is discharged from the upper fine coal slurry outlet.

[0017] The discharge port of the fine grinding device 5 and the fine coal slurry outlet of the hydrocyclone 4 are both connected to the premixing tank 6 via pipelines. The fine grinding device 5 is a colloid mill or a vertical sand mill, used to further grind the coarse coal slurry to make its particle size less than or equal to 25 micrometers. The ground coal slurry is discharged from the discharge port of the fine grinding device 5 and, together with the fine coal slurry discharged from the hydrocyclone 4, is transported through pipelines to the premixing tank 6 to mix and form the finished coal slurry. Example 2

[0018] refer to Figure 2 The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] refer to Figure 1 This utility model provides a high-concentration coal gasification coal-water slurry preparation device, including a coal bunker 1, a belt weighing feeder 2, a rod mill or ball mill 3, a hydrocyclone separator 4, and a fine grinding device 5; the outlet of the coal bunker 1 is connected to the inlet of the belt weighing feeder 2 through a pipeline, the coal bunker 1 is used to store raw coal, and the raw coal is transported to the belt weighing feeder 2 through the pipeline.

[0020] The discharge port of the belt weighing feeder 2 is connected to the feed port of the rod mill or ball mill 3 via a pipe. The belt weighing feeder 2 can weigh and measure the raw coal and evenly convey it to the rod mill or ball mill 3. The belt weighing feeder 2 includes a frame, a conveyor belt mounted on the frame, a drive device for driving the conveyor belt, and a weighing sensor mounted on the conveyor belt. The weighing sensor can monitor the weight of the raw coal on the conveyor belt in real time, and the drive device drives the conveyor belt to realize the conveying of raw coal.

[0021] The discharge port of the rod mill or ball mill 3 is connected to the inlet of the hydrocyclone 4 through a pipeline. The rod mill or ball mill 3 is used to perform preliminary grinding of raw coal, grinding the raw coal into coal slurry, and then transporting the coal slurry to the hydrocyclone 4 through a pipeline.

[0022] The coarse coal slurry outlet of the hydrocyclone separator 4 is connected to the feed inlet of the fine grinding device 5 via a pipeline. The hydrocyclone separator 4 includes a separator body, with a feed inlet at the upper part of the side of the separator body, a coarse coal slurry outlet at the lower part, and a fine coal slurry outlet at the upper part. The coal slurry enters from the side feed inlet of the hydrocyclone separator 4 and undergoes centrifugal separation within the hydrocyclone separator 4. The coarser coal slurry is discharged from the lower coarse coal slurry outlet and enters the fine grinding device 5 for further grinding; the finer coal slurry is discharged from the upper fine coal slurry outlet. The coarse coal slurry outlet of the hydrocyclone separator 4 is also connected to the feed inlet of the ultrafine grinding device 7 via a pipeline, and the discharge outlet of the ultrafine grinding device 7 is connected to the premixing tank via a pipeline.

[0023] The discharge ports of the fine grinding device 5, the ultrafine grinding device 7, and the fine coal slurry outlet of the hydrocyclone 4 are all connected to the premixing tank 6 via pipelines. The fine grinding device 5 is a colloid mill or a vertical sand mill, used to further grind the coarse coal slurry to make its particle size less than or equal to 25 micrometers. The ultrafine grinding device 7 is a horizontal ball mill or a vertical stirred mill. The coal particles in the coal-water slurry prepared by the ultrafine grinding device 7 are less than or equal to 10 micrometers. The coal slurry ground by the fine grinding device 5 and the ultrafine grinding device 7 are discharged from the discharge ports of the fine grinding device 5 and the ultrafine grinding device 7, respectively, and together with the fine coal slurry discharged from the hydrocyclone 4, they are transported to the premixing tank 6 via pipelines to mix and form the finished coal slurry.

[0024] In this invention, a coal slurry pump is installed between the rod mill or ball mill and the hydrocyclone, between the hydrocyclone and the fine grinding device and the ultrafine grinding device, and between the fine grinding device and the ultrafine grinding device and the premixing tank for transporting coal slurry; a stirring device is installed in the premixing tank to ensure that the coal slurry is mixed evenly.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-concentration coal gasification coal-water slurry preparation device, characterized in that: The system includes a coal bunker, a belt weighing feeder, a rod mill or ball mill, a hydrocyclone separator, and a fine grinding device. The outlet of the coal bunker is connected to the inlet of the belt weighing feeder via a pipe. The outlet of the belt weighing feeder is connected to the inlet of the rod mill or ball mill via a pipe. The outlet of the rod mill or ball mill is connected to the inlet of the hydrocyclone separator via a pipe. The coarse coal slurry outlet of the hydrocyclone separator is connected to the inlet of the fine grinding device via a pipe. The outlet of the fine grinding device and the fine coal slurry outlet of the hydrocyclone separator are both connected to a premixing tank via pipes.

2. The high-concentration coal gasification coal-water slurry preparation device according to claim 1, characterized in that: The belt weighing feeder includes a frame, a conveyor belt mounted on the frame, a drive device for driving the conveyor belt, and a weighing sensor mounted on the conveyor belt.

3. The high-concentration coal gasification coal-water slurry preparation device according to claim 1, characterized in that: The cyclone separator includes a separator body, with a feed inlet at the upper part of the side of the separator body, a coarse coal slurry outlet at the lower part, and a fine coal slurry outlet at the upper part.

4. The high-concentration coal gasification coal-water slurry preparation device according to claim 1, characterized in that: The fine grinding device is a colloid mill or a vertical sand mill.

5. The high-concentration coal gasification coal-water slurry preparation device according to claim 1, characterized in that: The coarse coal slurry outlet of the cyclone separator is also connected to the feed inlet of the ultrafine grinding device via a pipeline, and the discharge outlet of the ultrafine grinding device is connected to the premixing tank via a pipeline.

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