Device for co-producing synthesis gas through biomass fermentation

Abstract

The utility model provides a device for co-producing synthesis gas through biomass fermentation. The device comprises a biomass enzymolysis tank and a solid-liquid separation device which are connected, a solid phase outlet of the solid-liquid separation device is connected with the raw material pretreatment device; a liquid phase outlet of the solid-liquid separation device is connected with the co-production fermentation device; an outlet of the raw material pretreatment device is connected with the co-production gasification device; the co-production gasification device is used for entrained-flow bed reaction, washing and cooling; the co-production fermentation device comprises a fermentation tank and a rectification device; according to the device disclosed by the utility model, a liquid-phase product of biomass enzymolysis is used for fermentation, and a solid-phase residue is used for biomass gasification and co-production of synthesis gas after being subjected to related pretreatment, so that the tedious operation of drying, briquetting or granulating, carbonizing and grinding the traditional biomass raw material is omitted, the gasification process cost is reduced, and the production efficiency is improved. The resource utilization of the enzymolysis residues is realized.

Description

Technical Field

[0001] This utility model belongs to the field of chemical technology and relates to a device for co-producing syngas through biomass fermentation. Background Technology

[0002] Because biomass has an extremely high volatile content (over 60%) and poor thermal stability, traditional biomass gasification devices are difficult to operate, easily causing wear and tear on the equipment, resulting in unstable production and high operating costs.

[0003] Traditional biomass gasification processes require raw materials that have undergone drying, briquetting or granulation, carbonization, and grinding, resulting in high electricity and heat consumption and high production costs. Therefore, developing a device that can co-produce syngas without drying, briquetting or granulation, carbonization, and grinding is of great significance. Utility Model Content

[0004] The purpose of this invention is to provide a device for co-producing syngas from biomass fermentation. The device includes a connected biomass enzymatic hydrolysis tank and a solid-liquid separation device. The solid phase outlet of the solid-liquid separation device is connected to a raw material pretreatment device. The liquid phase outlet of the solid-liquid separation device is connected to a co-production fermentation device. The outlet of the raw material pretreatment device is connected to a co-production gasification device. The co-production gasification device is used for fluidized bed reaction, gas cooling, washing, etc. The co-production fermentation device includes a fermenter and a distillation unit. This invention uses the liquid phase product from biomass enzymatic hydrolysis for fermentation, and pre-treats the solid phase residue for biomass gasification to co-produce syngas. This reduces the cumbersome operations of traditional biomass raw materials, such as drying, briquetting or granulation, carbonization, and grinding, thereby reducing the cost of the gasification process and realizing the resource utilization of the enzymatic hydrolysis residue.

[0005] To achieve the objective of this utility model, the following technical solution is adopted:

[0006] This utility model provides a device for co-producing syngas through biomass fermentation, characterized in that the device includes a connected biomass enzymatic hydrolysis tank and a solid-liquid separation device;

[0007] The solid phase outlet of the solid-liquid separation device is connected to the co-production raw material pretreatment device.

[0008] The liquid phase outlet of the solid-liquid separation device is connected to the co-production fermentation device.

[0009] The outlet of the raw material pretreatment unit is connected to the co-production gasification unit;

[0010] The co-production gasification unit is used for fluidized bed reaction, crude syngas cooling, and washing;

[0011] The co-production fermentation unit includes a fermenter and a distillation unit.

[0012] Traditional biomass gasification requires drying, briquetting or granulation, carbonization, and grinding of biomass raw materials, which is complex and costly. The device described in this invention uses biomass enzymatic hydrolysis residue as the raw material for biomass gasification, eliminating the need for the aforementioned complex pretreatment operations. This results in lower biomass gasification costs, and the enzymatic hydrolysis process removes some low-calorific-value components. The enzymatic hydrolysis residue has a higher calorific value than biomass raw materials from traditional processes, leading to a higher effective gas composition in biomass gasification.

[0013] Preferably, the solid-liquid separator includes a filter and / or a centrifuge.

[0014] Preferably, the solid-liquid separation device is provided with a detergent inlet and a detergent outlet; preferably, the detergent is water.

[0015] In this invention, the enzymatic hydrolysis product is separated into solid and liquid phases to obtain a filter cake, which is then washed with a detergent; washing can further reduce the content of water-soluble impurity ions in the solid phase.

[0016] Preferably, the raw material pretreatment device includes a pulping device.

[0017] Preferably, the pulping equipment includes a pulping tank, which is provided with a solid phase inlet, a solvent inlet and an additive inlet, and the solid-liquid separation device is connected to the solid phase inlet of the pulping tank through a solid phase conveying device.

[0018] Preferably, the device further includes an auxiliary agent storage tank connected to an auxiliary agent inlet.

[0019] The solvent can be water, and the additives can be biological enzymes, etc., to help mix the solid residue with the solvent to obtain a slurry that meets the gasification requirements.

[0020] Preferably, the pulping tank is equipped with a stirring device.

[0021] Preferably, a temperature sensor is installed inside the pulping tank.

[0022] In this invention, the pulping equipment is used to mix the solid residue obtained from solid-liquid separation with the liquid phase to obtain a high-concentration slurry, which is then used as feed for gasification. The solid residue enters the pulping tank through the solid inlet, and the solvent and additives enter through the solvent inlet and additive inlet, respectively. The mixture is stirred and mixed under controlled temperature to obtain the slurry, which facilitates the feeding of the slurry into the subsequent gasification process.

[0023] Preferably, the co-production gasification unit includes an upper gasification reaction zone and a lower quench separation zone, wherein the quench separation zone is used for cooling and washing the crude syngas.

[0024] The outlet of the raw material pretreatment device is connected to the gasification reaction zone of the co-production gasification device; the gasification reaction zone is provided with a gasification agent inlet;

[0025] The sidewall of the quench separation zone is provided with a crude syngas outlet, and the bottom of the quench separation zone is provided with a gasification slag outlet.

[0026] The co-production gasification unit also includes a washing unit connected to the quench separation zone, which is used to wash the crude syngas.

[0027] Preferably, the washing unit includes a washing tower.

[0028] During the gasification process, the slurry and gasifying agent enter the gasification reaction zone, and the temperature and pressure are controlled to produce crude syngas. The reaction products enter the quench separation zone, and the crude syngas leaves the fluidized bed reactor through the crude syngas outlet on the side wall of the quench separation zone. It is then sent to the gasification washing system (washing unit) for further washing before being sent out of the boundary area. The gasification slag is discharged through the gasification slag outlet.

[0029] Preferably, the biomass enzymatic hydrolysis tank is provided with a biomass debris inlet and an enzyme preparation inlet; the bottom of the biomass enzymatic hydrolysis tank is provided with an enzymatic hydrolysis product outlet.

[0030] Preferably, the biomass enzymatic hydrolysis tank is equipped with a stirring device, and the biomass enzymatic hydrolysis tank is equipped with a temperature sensor and / or a pH sensor.

[0031] In this invention, a bio-enzymatic hydrolysis tank is used to mix cleaned, crushed, and gas-exploded biomass fragments with enzyme preparations, and then hydrolyze them at a controlled temperature and suitable pH to obtain sugar solution and residue.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] This invention utilizes the liquid-phase products from biomass enzymatic hydrolysis for fermentation and the solid-phase enzymatic hydrolysis residues for biomass gasification and syngas co-production. This reduces the cumbersome operations required for traditional biomass raw materials, such as drying, briquetting or granulation, carbonization, and grinding, thereby lowering the cost of the gasification process and realizing the resource utilization of enzymatic hydrolysis residues. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the apparatus for biomass fermentation and syngas production in Embodiment 3 of this utility model.

[0035] 1-Biomass enzymatic hydrolysis tank, 2-Solid-liquid separation device, 3-Raw material pretreatment device, 4-Co-production gasification device, 5-Fermentation tank, 6-Distillation device, 7-Gasification reaction zone, 8-Quick cooling separation zone, 9-Washing unit. Detailed Implementation

[0036] The technical solution of this utility model will be further described below through specific embodiments. Those skilled in the art should understand that the embodiments described are merely illustrative of this utility model and should not be considered as specific limitations thereof.

[0037] Example 1

[0038] This invention provides a device for co-producing syngas through biomass fermentation, such as... Figure 1 As shown, it includes:

[0039] The device includes a connected biomass enzymatic hydrolysis tank 1 and a solid-liquid separation device 2;

[0040] The solid phase outlet of the solid-liquid separation device 2 is connected to the raw material pretreatment device 3;

[0041] The liquid phase outlet of the solid-liquid separation device 2 is connected to the co-production fermentation device;

[0042] The outlet of the raw material pretreatment device 3 is connected to the co-production gasification device 4; the co-production gasification device 4 is used for fluidized bed reaction, crude syngas cooling, and washing.

[0043] The co-production fermentation unit includes a fermenter 5 and a distillation unit 6;

[0044] The solid-liquid separator is selected from filters;

[0045] The raw material pretreatment device 3 includes a pulping device;

[0046] The pulping equipment includes a pulping tank, which is provided with a solid phase inlet, a solvent inlet and an additive inlet. The solid-liquid separation device 2 is connected to the solid phase inlet of the pulping tank through a solid phase conveying device.

[0047] The device also includes an auxiliary agent storage tank, which is connected to an auxiliary agent inlet;

[0048] The pulping tank is equipped with a stirring device;

[0049] The pulping tank is equipped with a temperature sensor to monitor the temperature of the pulping tank, which facilitates the rapid conversion of solid residue into slurry.

[0050] The outside of the pulping tank is fitted with a jacket for temperature control.

[0051] In this embodiment, the co-production gasification unit 4 adopts slurry feeding, and the raw material pretreatment unit 3 includes a slurry preparation tank for mixing the solid residue obtained from the solid-liquid separation unit 2 with solvents, additives, etc. to prepare a slurry, which is then fed into the co-production gasification unit 4 for gasification.

[0052] Example 2

[0053] This embodiment is based on embodiment 1, such as... Figure 1 As shown, the fluidized bed reactor includes a gasification reaction zone 7 located at the top and a quench separation zone 8 located at the bottom. The quench separation zone 8 is used for cooling and washing the crude syngas.

[0054] The side wall of the quench separation zone 8 is provided with a crude syngas outlet, and the bottom of the quench separation zone 8 is provided with a gasification slag outlet.

[0055] The co-production gasification unit 4 also includes a washing unit 9, which is connected to the quench separation zone 8 and is used to wash the crude syngas. The washing unit 9 includes a washing tower.

[0056] Example 3

[0057] This embodiment is based on embodiment 2, such as Figure 1 As shown, the biomass enzymatic hydrolysis tank 1 is provided with a biomass debris inlet and an enzyme preparation inlet; the bottom of the biomass enzymatic hydrolysis tank 1 is provided with an enzymatic hydrolysis product outlet;

[0058] The biomass enzymatic hydrolysis tank 1 is equipped with a stirring device, a temperature sensor and / or a pH sensor; the biomass enzymatic hydrolysis tank 1 is equipped with a jacket for temperature control.

[0059] Application example:

[0060] This application example uses corn cobs as raw material and employs the apparatus described in Example 3. The corn cobs are washed, crushed, and gas-exploded to obtain biomass fragments. These fragments are then fed into a biomass enzymatic hydrolysis tank 1, where they are hydrolyzed into sugar by cellulase to obtain sugar solution and solid residue. The sugar solution is fermented in a fermentation tank 5 and purified by a distillation unit 6 to obtain cellulosic ethanol with a purity of over 95.5%.

[0061] The typical particle size of the solid residue is less than 1000 micrometers. The calorific value can reach 18 MJ / kg when measured by bomb calorimetry. It enters the pulping tank, where solvents and additives are added and mixed to obtain a slurry with a concentration of about 70%. The slurry then enters the fluidized bed reactor and is mixed with the gasifying agent to react and obtain crude syngas. The effective gas ratio can reach more than 70%.

[0062] Using the device described in this invention, enzymatic hydrolysis removes some low-calorific-value components, and the solid residue obtained from solid-liquid separation has a high calorific value and can be directly made into a slurry as a gasification feedstock. The resulting crude syngas has a high effective gas content, and solid-liquid separation removes some impurity ions, resulting in less impurity content in the crude syngas.

[0063] The applicant declares that the above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. An apparatus for co-producing syngas from biomass fermentation, characterized in that, The device includes a connected biomass enzymatic hydrolysis tank and a solid-liquid separation device; The solid phase outlet of the solid-liquid separation device is connected to the raw material pretreatment device. The liquid phase outlet of the solid-liquid separation device is connected to the co-production fermentation device. The outlet of the raw material pretreatment unit is connected to the co-production gasification unit; The co-production gasification unit is used for fluidized bed reaction, crude syngas cooling, and washing; The co-production fermentation unit includes a fermenter and a distillation unit.

2. The apparatus according to claim 1, characterized in that, The solid-liquid separation device includes a filter and / or a centrifuge.

3. The apparatus according to claim 1, characterized in that, The raw material pretreatment device includes pulping equipment.

4. The apparatus according to claim 3, characterized in that, The pulping equipment includes a pulping tank, which is provided with a solid phase inlet, a solvent inlet and an additive inlet. The solid-liquid separation device is connected to the solid phase inlet of the pulping tank through a solid phase conveying device.

5. The apparatus according to claim 4, characterized in that, The device also includes an auxiliary agent storage tank connected to an auxiliary agent inlet.

6. The apparatus according to claim 4, characterized in that, The pulping tank is equipped with a stirring device.

7. The apparatus according to claim 4, characterized in that, A temperature sensor is installed inside the pulping tank.

8. The apparatus according to claim 1, characterized in that, The co-production gasification unit includes an upper gasification reaction zone and a lower quench separation zone, the quench separation zone being used for cooling and washing the crude syngas; The sidewall of the quench separation zone is provided with a crude syngas outlet, and the bottom of the quench separation zone is provided with a gasification slag outlet. The co-production gasification unit also includes a washing unit connected to the quench separation zone, which is used to wash the crude syngas.

9. The apparatus according to claim 1, characterized in that, The biomass enzymatic hydrolysis tank is equipped with a biomass debris inlet and an enzyme preparation inlet; the bottom of the biomass enzymatic hydrolysis tank is equipped with an enzymatic hydrolysis product outlet.

10. The apparatus according to claim 1, characterized in that, The biomass enzymatic hydrolysis tank is equipped with a stirring device, and a temperature sensor and / or pH sensor.

Images