Biomass partial carbonization and coal co-gasification device

Abstract

The utility model discloses a biomass partial carbonization and coal co-gasification device, which comprises a biomass conveying device, a heating furnace, a raw coal conveying device, a mixing device, a coal slurry preparation device and a gasification furnace, the biomass conveying device is connected with the heating furnace, the heating furnace is connected with the mixing device, the raw coal conveying device is connected with the mixing device, and the coal slurry preparation device is connected with the gasification furnace. The mixing device is connected with the coal slurry preparation device, and the coal slurry preparation device is connected with the gasification furnace. According to the method, the biomass is partially carbonized and then is gasified with the coal according to a certain proportion, so that the utilization rate of the biomass is increased, the indexes of the prepared coal slurry are normal, the energy density of a gas product is ensured, and the use of coal and the emission of carbon are reduced. In addition, compared with full carbonization, partial carbonization of the biomass reduces carbonization time, energy required by carbonization and mass loss in the carbonization process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the biomass renewable energy utilization and coal chemical industry cross technical field, concretely relates to a kind of device of biomass partial carbonization and coal co-gasification. BACKGROUND

[0002] As a kind of renewable energy, biomass energy has the advantages of wide source and abundant reserves. Biomass gasification is one of the important biomass utilization technologies, which converts biomass energy into combustible gas, so that biomass energy can be applied to various fields of industrial production. However, single biomass gasification has the disadvantages of low reaction temperature and low calorific value of fuel gas, which greatly limits the development of biomass gasification technology.

[0003] Chinese patent with authorization announcement No. CN216584902U discloses a biomass and coal co-gasification system, which is connected by a coal pyrolysis furnace and a gasification furnace in a certain way to form a co-gasification system, achieving coal and biomass co-gasification to obtain high-calorific-value fuel gas. The system has low energy consumption and high fuel gas calorific value. However, the biomass directly enters the gasification furnace for gasification, resulting in low energy density and poor grindability of the fuel gas product. Moreover, it affects the utilization rate of biomass. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a device for biomass partial carbonization and coal co-gasification to reduce carbon emissions and improve the utilization rate of biomass, while ensuring the energy density of fuel gas products.

[0005] The utility model solves the above problems through the following technical means: a device for biomass partial carbonization and coal co-gasification, which includes a biomass conveying device, a heating furnace, a raw coal conveying device, a mixing device, a coal slurry preparation device, and a gasification furnace. The biomass conveying device is connected to the heating furnace. The heating furnace is connected to the mixing device. The raw coal conveying device is connected to the mixing device. The mixing device is connected to the coal slurry preparation device. The coal slurry preparation device is connected to the gasification furnace.

[0006] Further, it also includes a raw coal bin, which is connected to the mixing device and the coal slurry preparation device.

[0007] Further, it also includes a weighing coal feeder, which is connected to the raw coal bin and the coal slurry preparation device.

[0008] Further, the coal slurry preparation device includes a coal mill, a coal mill water conveying device, a benzene extraction residual liquid conveying device, and an additive conveying device. The weighing coal feeder is connected to the coal mill. The coal mill water conveying device, the benzene extraction residual liquid conveying device, and the additive conveying device are all connected to the coal mill.

[0009] Further, a coal mill is provided, and a coal mill discharge chute is connected to the coal mill.

[0010] Further, a coal slurry tank is provided, and the coal mill discharge chute is connected to the coal slurry tank by a pipeline, and the coal slurry tank is connected to the gasifier by a pipeline.

[0011] Further, a coal mill discharge chute pump is provided on the pipeline connecting the coal mill discharge chute and the coal slurry tank.

[0012] Further, a coal slurry pump is provided on the pipeline connecting the coal slurry tank and the gasifier.

[0013] The above-mentioned devices are provided with corresponding pipelines or conveying members during connection, which is prior art and will not be described in detail.

[0014] The biomass partial carbonization and coal co-gasification device of the present application has the following advantages: biomass is partially carbonized, and then co-gasified with coal in a certain proportion, which not only improves the utilization rate of biomass, but also ensures the energy density of the gas product, reduces the use of coal and carbon emissions, and the prepared coal slurry has normal indicators. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in combination with the drawings and examples.

[0016] Figure 1 FIG. 1 is a schematic view of a biomass partial carbonization and coal co-gasification device according to an embodiment of the present application. DETAILED DESCRIPTION

[0017] The present application will be further described below in combination with the drawings and examples.

[0018] As Figure 1As shown, the device for co-gasification of partially carbonized biomass and coal in the embodiment comprises a biomass conveying device 1, a heating furnace 2, a raw coal conveying device 3, a mixing device 4, a raw coal bin 5, a weighing coal feeder 6, a coal slurry preparation device and a gasification furnace. The biomass conveying device is connected with the heating furnace, the heating furnace is connected with the mixing device, the raw coal conveying device is connected with the mixing device, the mixing device is connected with the raw coal bin, the raw coal bin is connected with the weighing coal feeder, the weighing coal feeder is connected with the coal slurry preparation device, and the coal slurry preparation device is connected with the gasification furnace.

[0019] In the embodiment, the coal slurry preparation device comprises a coal mill 10, a coal mill water conveying device 7, a benzene extraction residual liquid conveying device 8 and an additive conveying device 9. The weighing coal feeder is connected with the coal mill, and the coal mill water conveying device, the benzene extraction residual liquid conveying device and the additive conveying device are all connected with the coal mill.

[0020] Preferably, a coal mill discharge chute and a coal slurry tank are further included. The coal mill is connected with the coal mill discharge chute, the coal mill discharge chute is connected with the coal slurry tank through a pipeline, the coal slurry tank is connected with the gasification furnace through a pipeline, a coal mill discharge chute pump is arranged on the pipeline connecting the coal mill discharge chute with the coal slurry tank, and a coal slurry pump is arranged on the pipeline connecting the coal slurry tank with the gasification furnace. The coal slurry tank can be used for storing the coal slurry, and the coal slurry pump can be used for pumping the coal slurry to the gasification furnace.

[0021] The biomass is conveyed to the heating furnace through the biomass conveying device, heated in the heating furnace for 20-40 min in an inert environment (such as a nitrogen environment), the heating temperature is 200-400℃, and the mass loss of the biomass is 35-65%. Compared with complete carbonization, the carbonization time and the mass loss of the carbonized biomass are greatly reduced. The element analysis, industrial analysis, ash composition analysis and ash melting point test of the partially carbonized biomass are shown in Table 1.

[0022]

[0023] The raw coal conveying device 3 is connected with the mixing device 4, the partially carbonized biomass and the raw coal are mixed in the mixing device 4 at a ratio of 5-15%, the mixing device 4 is connected with the raw coal bin 5, and the raw coal bin 5 is connected with the weighing coal feeder 6. The outlet pipeline of the weighing coal feeder 6, the coal mill water conveying device 7, the benzene extraction residual liquid conveying device 8, the additive conveying device 9 and the coal mill 10 are connected, the materials are mixed in the coal mill 10 to prepare the finished water coal slurry, and the water coal slurry is collected in the coal mill discharge chute 11. The properties of the water coal slurry are shown in Table 2.

[0024]

[0025] The finished water coal slurry is conveyed to the coal slurry tank 13 through the coal mill discharge chute pump 12, and then the finished water coal slurry is sent to the gasification furnace 15 through the coal slurry pump 14 to prepare the crude synthetic gas.

[0026] Finally, it is pointed out that the above embodiments are only to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. An apparatus for co-gasification of partially carbonized biomass with coal, characterized by: The biomass conveying device, the heating furnace, the raw coal conveying device, the mixing device, the coal slurry preparation device and the gasification furnace are connected.

2. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 1, characterized in that: The mixing device is connected with the raw coal bin, and the raw coal bin is connected with the coal slurry preparation device.

3. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 2, characterized in that: The raw coal bin is connected with the weighing coal feeder, and the weighing coal feeder is connected with the coal slurry preparation device.

4. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 3, characterized in that: The coal slurry preparation device comprises a coal mill, a coal mill water conveying device, a benzene extraction residual liquid conveying device and an additive conveying device.

5. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 4, characterized in that: The coal mill is connected with the coal mill discharge chute, and the coal mill discharge chute is connected with the gasification furnace.

6. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 5, characterized in that: The coal mill discharge chute is connected with the coal slurry tank through a pipeline, and the coal slurry tank is connected with the gasification furnace through a pipeline.

7. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 6, characterized in that: A coal mill discharge chute pump is arranged on the pipeline connecting the coal mill discharge chute and the coal slurry tank.

8. The apparatus for co-gasification of partially carbonized biomass with coal according to claim 7, characterized in that: A coal slurry pump is arranged on the pipeline connecting the coal slurry tank and the gasification furnace.

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