System for preparing synthesis gas from biomass

Abstract

The utility model discloses a system for preparing synthesis gas by using biomass, which comprises a pyrolysis gasification furnace, an air blower, a tar interceptor, an electrical tar precipitator, a filter and a booster fan, an air outlet of the air blower is communicated with a blower nozzle of the pyrolysis gasification furnace, and a slag discharge port is arranged at the bottom of the pyrolysis gasification furnace; the input end of the tar interceptor is communicated with an exhaust port of the pyrolysis gasifier, the output end of the tar interceptor is communicated with the input end of the electrical tar precipitator, the output end of the electrical tar precipitator is communicated with the input end of the filter, the output end of the filter is communicated with the input end of the booster fan, and the output end of the booster fan is connected with a gas using end. The system has the advantages that biomass can be utilized to form synthesis gas with medium calorific value and good quality, the synthesis gas can be directly used for cooking, power generation or heat supply, biomass resources can be fully utilized by the whole system, and environmental pollution and resource waste are avoided.

Description

Technical Field

[0001] This utility model relates to the field of biomass energy utilization technology, specifically to a system for producing syngas from biomass. Background Technology

[0002] my country is a major agricultural country with abundant agricultural biomass straw production. Currently, most of it is directly returned to the field. However, insect eggs in the straw can reduce crop yields the following year. In addition, the indiscriminate disposal and burning of straw causes environmental pollution and waste of resources. Biomass has disadvantages such as dispersed resources, low energy density, and inconvenient storage and transportation, which seriously restrict its large-scale application. Utility Model Content

[0003] Therefore, this invention provides a system for producing syngas from biomass to solve the above-mentioned problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] According to a first aspect of the present invention, a system for preparing syngas using biomass includes a pyrolysis gasifier, a blower, a tar interceptor, an electrostatic tar precipitator, a filter, and a booster blower, wherein the outlet of the blower is connected to the outlet of the pyrolysis gasifier, and the bottom of the pyrolysis gasifier is provided with a slag discharge port.

[0006] The input end of the tar interceptor is connected to the exhaust port of the pyrolysis gasification furnace, the output end of the tar interceptor is connected to the input end of the electrostatic tar precipitator, the output end of the electrostatic tar precipitator is connected to the input end of the filter, the output end of the filter is connected to the input end of the booster fan, and the output end of the booster fan is connected to the gas consumption end.

[0007] Furthermore, it also includes a bucket elevator and a chute. The top of the pyrolysis gasification furnace is provided with a feed hopper, the bucket elevator is located on one side of the pyrolysis gasification furnace, and the discharge end of the bucket elevator is connected to the feed hopper through the chute.

[0008] Furthermore, it also includes a buffer bin and a belt conveyor. The bottom of the buffer bin is provided with a discharge port. The feeding end of the belt conveyor is located below the discharge port of the buffer bin, and the unloading end of the belt conveyor is located above the feeding end of the bucket elevator.

[0009] Furthermore, it also includes a slag conveying device, which is located below the slag discharge port of the pyrolysis gasifier.

[0010] Furthermore, the slag conveying equipment adopts a screw conveyor.

[0011] Furthermore, it also includes a slag collection bin, which is located below the unloading end of the slag conveying equipment.

[0012] Furthermore, the filter is a dry filter, and the filter material of the dry filter is corn cob and / or sawdust and wood chips.

[0013] Furthermore, the filtration flow rate of the filter is 0.2 m / s to 0.5 m / s.

[0014] This invention has the following advantages: Biomass undergoes four stages in the pyrolysis gasification furnace: drying, pyrolysis gasification, oxidation, and reduction, transforming it into biomass syngas and biomass char residue. The biomass char residue is discharged through the bottom of the pyrolysis gasification furnace. The biomass syngas is purified by tar interception, electrostatic tar precipitator, and filter to form syngas with medium calorific value and good quality, which can be directly used for cooking, power generation, or heating. The entire system can make full use of biomass resources and avoid environmental pollution and resource waste. Attached Figure Description

[0015] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 This is a schematic diagram of a system for producing syngas from biomass, provided for some embodiments of this utility model.

[0018] In the diagram: 1. Buffer bin, 2. Belt conveyor, 3. Bucket elevator, 4. Pyrolysis gasification furnace, 5. Blower, 6. Carbon slag conveying equipment, 7. Tar interceptor, 8. Electrostatic precipitator, 9. Filter, 10. Booster fan, 11. Chute, 12. Feed hopper. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Example 1

[0021] like Figure 1 As shown, a system for preparing syngas using biomass in the first aspect embodiment of this utility model includes a pyrolysis gasifier 4, a blower 5, a tar interceptor 7, an electrostatic tar precipitator 8, a filter 9, and a booster blower 10. The air outlet of the blower 5 is connected to the air outlet of the pyrolysis gasifier 4. The oxidizing air of the pyrolysis gasifier 4 is distributed through the blower 5. The bottom of the pyrolysis gasifier 4 is provided with a slag discharge port.

[0022] The input end of the tar interceptor 7 is connected to the exhaust port of the pyrolysis gasifier 4, the output end of the tar interceptor 7 is connected to the input end of the electrostatic precipitator 8, the output end of the electrostatic precipitator 8 is connected to the input end of the filter 9, the output end of the filter 9 is connected to the input end of the booster fan 10, and the output end of the booster fan 10 is connected to the gas consumption end. The booster fan 10 is used to overcome the resistance of the system and discharge the purified syngas.

[0023] In this embodiment, it should be noted that the working principle of the electrostatic precipitator 8 is based on the adsorption effect of an electric field on charged particles. By using a high-voltage electric field, charged particles such as tar and dust in the gas are subjected to the electric field force and thus adsorbed onto the electrode, thereby purifying the gas. The temperature of the syngas at the inlet of the electrostatic precipitator 8 is below 120°C. In order to ensure the normal operation of the electrostatic precipitator, it is necessary to clean the deposits on the electrode regularly.

[0024] Filter 9 is a dry filter. The filter material of the dry filter is corn cob and / or sawdust and wood chips. The filtration flow rate of filter 9 is 0.2m / s to 0.5m / s. The saturated waste material (used filter material) in filter 9 after replacement is sent to the pyrolysis gasification furnace for pyrolysis treatment.

[0025] Biomass feedstocks that can be processed in pyrolysis gasification furnaces include crop straw, garden branches and firewood, or other one or more mixtures containing lignin. Before processing, the biomass needs to be shaped or crushed into cylinders, blocks or other similar shapes with a maximum length of less than 80 mm and a moisture content of less than 25%.

[0026] Furthermore, the working principle of the entire system is as follows: During operation, biomass is shaped or crushed into cylinders, squares, or other similar shapes with a maximum length of less than 80mm and a moisture content of less than 25%. It is then conveyed to the pyrolysis gasification furnace 4 via a feeding conveyor. After four stages of drying (100℃~300℃), pyrolysis gasification (400℃~750℃), oxidation (900℃~1000℃), and reduction (700℃~900℃), it is converted into biomass syngas and biomass char. The biomass char is discharged through the bottom char conveying equipment. The biomass syngas is purified by tar interception, electrostatic precipitator, and filter to form syngas with medium calorific value and better quality, which can be directly used for cooking, power generation, or heating.

[0027] The technical effect achieved by this embodiment is that biomass is processed to generate syngas, which can be directly used for cooking, power generation or heating. The entire system can make full use of biomass resources and avoid environmental pollution and resource waste.

[0028] Example 2

[0029] like Figure 1 As shown in the figure, this embodiment provides another system for producing syngas from biomass, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0030] In this embodiment, a bucket elevator 3 and a chute 11 are also included. A feed hopper 12 is provided on the top of the pyrolysis gasification furnace 4. The bucket elevator 3 is located on one side of the pyrolysis gasification furnace 4, and the discharge end of the bucket elevator 3 is connected to the feed hopper 12 through the chute 11. Specifically, the chute 11 is inclined, the top end of the chute 11 is connected to the discharge end of the bucket elevator 3, and the bottom end of the chute 11 is connected to the feed hopper 12.

[0031] In this embodiment, it should be noted that a buffer bin 1 and a belt conveyor 2 are also included. The bottom of the buffer bin 1 is provided with a discharge port. The feeding end of the belt conveyor 2 is located below the discharge port of the buffer bin 1, and the unloading end of the belt conveyor 2 is located above the feeding end of the bucket elevator 3. The belt conveyor adopts frequency conversion control to control the feeding rate. The whole system is controlled by PLC.

[0032] The technical effect achieved in this embodiment is that the buffer bin 1, belt conveyor 2, bucket elevator 3 and chute 11 together form a biomass storage and supply device, which can buffer and supply biomass and adjust the feeding rate.

[0033] Example 3

[0034] like Figure 1 As shown in the figure, this embodiment provides another system for producing syngas from biomass, the structure of which includes all the contents of Embodiment 2. Only the different parts are described below.

[0035] In this embodiment, a slag conveying device 6 is also included. The slag conveying device 6 is a screw conveyor and is located below the slag discharge port of the pyrolysis gasification furnace 4.

[0036] In this embodiment, it should be noted that a slag collection bin is also included, which is located below the unloading end of the slag conveying equipment 6.

[0037] The technical effect achieved in this embodiment is that by setting up the char slag conveying device 6 and the char slag collection bin, the biomass char slag produced by the pyrolysis gasification furnace 4 can be collected. Biomass char slag has a variety of uses, such as soil conditioner, fertilizer carrier, adsorbent, fuel, etc., which can make full use of its value and improve economic efficiency.

[0038] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

[0039] The terms such as "upper," "lower," "left," "right," and "middle" used in this specification are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

Claims

1. A system for producing syngas from biomass, characterized in that, It includes a pyrolysis gasifier (4), a blower (5), a tar interceptor (7), an electrostatic tar collector (8), a filter (9), and a booster blower (10). The air outlet of the blower (5) is connected to the air outlet of the pyrolysis gasifier (4), and the bottom of the pyrolysis gasifier (4) is provided with a slag discharge port. The input end of the tar interceptor (7) is connected to the exhaust port of the pyrolysis gasifier (4), the output end of the tar interceptor (7) is connected to the input end of the electrostatic tar precipitator (8), the output end of the electrostatic tar precipitator (8) is connected to the input end of the filter (9), the output end of the filter (9) is connected to the input end of the booster fan (10), and the output end of the booster fan (10) is connected to the gas consumption end.

2. The system for producing syngas from biomass according to claim 1, characterized in that, It also includes a bucket elevator (3) and a chute (11). The top of the pyrolysis gasification furnace (4) is provided with a feed hopper (12). The bucket elevator (3) is located on one side of the pyrolysis gasification furnace (4), and the discharge end of the bucket elevator (3) is connected to the feed hopper (12) through the chute (11).

3. A system for producing syngas from biomass according to claim 2, characterized in that, It also includes a buffer bin (1) and a belt conveyor (2). The bottom of the buffer bin (1) is provided with a discharge port. The feeding end of the belt conveyor (2) is located below the discharge port of the buffer bin (1), and the unloading end of the belt conveyor (2) is located above the feeding end of the bucket elevator (3).

4. The system for producing syngas from biomass according to claim 1, characterized in that, It also includes a slag conveying device (6), which is located below the slag discharge port of the pyrolysis gasifier (4).

5. A system for producing syngas from biomass according to claim 4, characterized in that, The slag conveying equipment (6) adopts a screw conveyor.

6. A system for producing syngas from biomass according to claim 4, characterized in that, It also includes a slag collection bin, which is located below the unloading end of the slag conveying equipment (6).

7. A system for producing syngas from biomass according to claim 1, characterized in that, The filter (9) is a dry filter, and the filter material of the dry filter is corn cob and / or sawdust and wood chips.

8. A system for producing syngas from biomass according to claim 7, characterized in that, The filter (9) has a filtration flow rate of 0.2 m / s to 0.5 m / s.

Images