CN213681497U

CN213681497U - Lignocellulose continuous treatment device

Info

Publication number: CN213681497U
Application number: CN202022681841.7U
Authority: CN
Inventors: 刘国庆; 钱晓勇
Original assignee: Xianyang Institute Of Biological Manufacturing Technology
Current assignee: Xianyang Institute Of Biological Manufacturing Technology
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-13
Anticipated expiration: 2030-11-18

Abstract

The utility model provides a lignocellulose serialization processing apparatus, is including the batching jar that connects gradually, transfers thick liquid jar, heating coil, flash tank, reaction tube, cooling tank, pH condition jar and the solid-liquid separation jar one, wherein, batching jar entry linkage solid caustic soda storage tank and water tank, transfer thick liquid jar entry linkage lignocellulose ammoniation jar. The utility model discloses an aspect adopts the means that ammoniation, alkali combined together, and its condition is mild, the energy consumption is low and the preliminary treatment is effectual, and on the other hand can realize the lignocellulose serialization under the mild condition and handle, and the energy consumption is low, and the preliminary treatment is effectual.

Description

Lignocellulose continuous treatment device

Technical Field

The utility model belongs to the technical field of the comprehensive utilization of living beings, in particular to lignocellulose serialization processing apparatus.

Background

The main components of the crop straws are cellulose, hemicellulose and lignin, and no matter what product is produced by utilizing the crop straws, the sugar (including glucose and xylose) production rate of fiber raw materials is an important factor influencing the whole process production line. Only after lignocellulose is converted into glucose, xylose and other monosaccharides through enzymolysis, the lignocellulose can be converted into various biological products through a fermentation process. Thus, saccharification is the most critical step in the conversion of lignocellulose into energy and is also the limiting step in the conversion of lignocellulose into energy. At present, the main routes of cellulose hydrolytic saccharification are chemical hydrolysis and enzymatic hydrolysis. The enzymatic hydrolysis is widely applied due to the advantages of mild process conditions, simple equipment requirements, low energy consumption, fewer byproducts, environmental friendliness and the like, and how to realize effective saccharification of the straws by adopting an enzymolysis mode is still a research hotspot in the field.

The main purpose of pretreatment is to break the recalcitrance of the wood fiber raw material, namely to remove lignin, simultaneously remove complex network structures formed by lignin, cellulose and hemicellulose, reduce the crystallinity of the cellulose, increase the surface aperture and the surface area of the material, improve the accessibility of cellulase to the wood fiber raw material and the like, reduce the irreversible absorption of the cellulase in the subsequent enzymatic hydrolysis process due to the removal of the lignin, and further greatly improve the enzymolysis efficiency.

The pretreatment methods currently used at home and abroad can be roughly classified into physical pretreatment (mechanical pulverization, pyrolysis, microwave irradiation, freeze pulverization, radiation treatment, etc.), chemical pretreatment (acid treatment, alkali treatment, oxygen delignification, organic solvent method, etc.), and physical and chemical combined pretreatment (steam explosion, ammonia fiber explosion, and CO₂Blasting, etc.) and biological pretreatment. These pretreatment methods have different effects and have respective advantages and disadvantages. The selection of the pretreatment method not only needs to consider the effect of pretreatment of the wood fiber raw material, but also needs to consider the energy consumption generated in the pretreatment process, the recovery of chemicals and whether the subsequent enzymolysis and fermentation inhibitor is generated in the pretreatment.

On the other hand, the existing treatment modes of lignocellulose are high-temperature batch treatment, materials need to stay in equipment, and industrial continuous production is severely restricted.

Disclosure of Invention

In order to overcome the shortcoming of the prior art, the utility model aims to provide a lignocellulose serialization processing apparatus adopts the means that ammoniation, alkali combined together on the one hand, and its condition is mild, the energy consumption is low and the preliminary treatment is effectual, and on the other hand can realize the lignocellulose serialization processing under the mild condition, and the energy consumption is low, and the preliminary treatment is effectual.

In order to realize the purpose, the utility model discloses a technical scheme is:

the utility model provides a lignocellulose serialization processing apparatus, its characterized in that, is including batching jar 1, mixing thick liquid jar 2, heating coil 3, flash tank 4, reaction tube 5, cooling tank 6, pH condition jar 7 and the solid-liquid separation jar 8 that connect gradually, wherein, 1 entry linkage solid alkali storage tank 13 and water tank 14 of batching jar, 2 entry linkage lignocellulose ammoniation jar 15 of mixing thick liquid jar.

The lignocellulose ammonification tank 15 is anaerobic equipment and is connected with a lignocellulose raw material supply device and an ammonia supply device.

And stirrers are arranged in the batching tank 1, the size mixing tank 2 and the pH condition tank 7.

The heating portion of the heating coil 3 is located at the inlet position.

The heat source of the heating coil 3 is steam, and the steam generated by the flash tank 4 is a part of the heat source of the heating coil 3.

The reaction pipeline 5 is formed by sequentially connecting a plurality of sections of straight pipelines in series.

The export of the liquid part of solid-liquid separation jar 8 is divided into two the tunnel, connects all the way and produces compound xylanase fermentation cylinder 16, and the export of producing compound xylanase fermentation cylinder 16 all connects enzymolysis tank 9 with the another way of the liquid part export of solid-liquid separation jar 8, and the export of the solid part of solid-liquid separation jar 8 is divided into two the tunnel, connects all the way and produces compound cellulase fermentation cylinder two 17, and the export of producing compound cellulase fermentation cylinder two 17 all connects enzymolysis tank two 10 with the another way of the solid part export of solid-liquid separation jar 8.

The outlet of the first enzymolysis tank 9 is divided into two paths, one path of the outlet is connected with the outlet of the second enzymolysis tank 10 to form a second solid-liquid separation tank 11, and the liquid part outlet of the second solid-liquid separation tank 11 and the other path of the outlet of the first enzymolysis tank 9 are connected with a product fermentation tank 12.

Stirrers are arranged in the first enzymolysis tank 9, the second enzymolysis tank 10 and the product fermentation tank 12.

And the supernatant of the first solid-liquid separation tank 8 is connected with an evaporator 18 to replenish water for the evaporator 18, the condensed water generated by the evaporator 18 is connected with a water tank 14, and the generated steam is used as a heat source of the heating coil 3.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the method adopts a means of combining ammoniation and alkali, so that the treatment effect of the raw materials is further improved.

2. By adopting continuous low-medium-temperature pretreatment, the problems of overlarge alkali consumption in the traditional alkali treatment, overhigh temperature in the high-temperature treatment, high investment cost of pressure equipment and the like are solved.

3. The utility model discloses can promote the preliminary treatment effect of lignocellulose raw materials, reduce pressure equipment's cost input realizes serialization processing in the processing procedure, has reduced the labour cost, has improved production efficiency.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.

Detailed Description

The following describes embodiments of the present invention in detail with reference to the drawings and examples.

Example 1

Referring to fig. 1, a lignocellulose continuous treatment device comprises a batching tank 1, a size mixing tank 2, a heating coil 3, a flash tank 4, a reaction pipeline 5, a cooling tank 6, a pH condition tank 7 and a solid-liquid separation tank 8 which are connected in sequence, wherein an inlet of the batching tank 1 is connected with a solid alkali storage tank 13 and a water tank 14, and an inlet of the size mixing tank 2 is connected with a lignocellulose ammoniation tank 15. The batching tank 1, the size mixing tank 2 and the pH condition tank 7 are all provided with a stirrer.

In this embodiment, the lignocellulose ammonification tank 15 is an anaerobic device, and is connected to the lignocellulose raw material supply device and the ammonia supply device.

In this embodiment, the heating portion of the heating coil 3 is located at the inlet position, the heat source is steam, and the steam generated by the flash tank 4 is a part of the heat source of the heating coil 3.

The reaction pipeline 5 can be formed by connecting a plurality of sections of straight pipelines in series in sequence.

According to this configuration, the continuous processing of the present invention comprises the steps of:

step 1), a solid alkali storage tank 13 and a water tank 14 respectively feed solid alkali and water into the batching tank 1 in proportion, wherein the solid alkali can be one or more of sodium hydroxide, potassium hydroxide, calcium oxide and magnesium hydroxide. The method comprises the following steps of crushing lignocellulose raw materials such as agricultural and forestry wastes, sending the crushed lignocellulose raw materials into an ammonia supply device, carrying out ammoniation treatment, wherein the ammoniation treatment is carried out by adding 3-5% of urea by weight and carrying out anaerobic treatment for 14-30 days at normal temperature or adding 5-10% of ammonia water by weight and carrying out anaerobic treatment for 7-15 days at normal temperature, the ammoniated materials can be further treated by enzymolysis and fermentation, and the water content of the ammoniated solid raw materials is about 50-70%.

And 2), sending the aminated solid raw material to a slurry mixing tank 2, sending the material prepared by the material preparing tank 1 to the slurry mixing tank 2, mixing the material in the slurry mixing tank 2, and stirring the material in the process, wherein the weight ratio of the solid raw material to the solid alkali is controlled within the range of 10: 1-15: 1.

And step 3), continuously feeding the mixed slurry in the slurry mixing tank 2, heating the mixed slurry to 80-100 ℃ through the heating part of the heating coil 3, and then sequentially passing through the heating coil 3, the flash tank 4 and the reaction pipeline 5 to finish the reaction for 2-4 hours.

And 4) cooling the reaction product in a cooling tank 6, and adjusting the pH value in a pH condition tank 7 to an environment suitable for enzymolysis.

And 5) finally, performing solid-liquid separation on the material in a first solid-liquid separation tank 8 to obtain a solid part which is cellulose residue.

Continuous processing of lignocellulose can be achieved by continuously feeding and adding water, in the process, steam generated in the flash tank 4 is also used as a part of a heat source, and cooling water heated in the cooling tank 6 can be used as water supplement of the water tank 14.

Example 2

Referring to fig. 2, on the basis of example 1, the product of the first solid-liquid separation tank 8 is continuously treated. The liquid part outlet of the solid-liquid separation tank I8 is divided into two paths, one path is connected with the composite xylanase production fermentation tank I16, the outlet of the composite xylanase production fermentation tank I16 and the other path of the liquid part outlet of the solid-liquid separation tank I8 are both connected with the enzymolysis tank I9, the solid part outlet of the solid-liquid separation tank I8 is divided into two paths, the other path is connected with the composite cellulase production fermentation tank II 17, and the outlet of the composite cellulase production fermentation tank II 17 and the other path of the solid part outlet of the solid-liquid separation tank I8 are both connected with the enzymolysis tank II 10.

The outlet of the first enzymolysis tank 9 is divided into two paths, one path of the outlet and the outlet of the second enzymolysis tank 10 are both connected with a second solid-liquid separation tank 11, and the liquid part outlet of the second solid-liquid separation tank 11 and the other path of the outlet of the first enzymolysis tank 9 are connected with a product fermentation tank 12. Wherein, stirrers are arranged in the first enzymolysis tank 9, the second enzymolysis tank 10 and the product fermentation tank 12.

In this embodiment, xylose in the liquid fraction obtained in the first solid-liquid separation tank 8 is extracted after passing through the first enzymolysis tank 9, while in the second solid-liquid separation tank 11, the solid product is xylose residue and glucose residue, i.e., a bio-based material, the liquid product contains a large amount of glucose, and the xylose and the glucose are fermented together in the product fermentation tank 12 to obtain a bio-based product.

Example 3

Referring to fig. 3, on the basis of the embodiment 2, the supernatant of the first solid-liquid separation tank 8 is connected with the evaporator 18 to replenish water for the evaporator 18, the condensed water generated by the evaporator 18 is connected with the water tank 14, and the generated steam is used as a heat source for the heating coil 3.

Claims

1. The utility model provides a lignocellulose serialization processing apparatus, its characterized in that, is including batching jar (1), mixing thick liquid jar (2), heating coil (3), flash tank (4), reaction tube (5), cooling tank (6), pH condition jar (7) and solid-liquid separation jar (8) that connect gradually, wherein, batching jar (1) entry linkage solid alkali storage tank (13) and water tank (14), mixing thick liquid jar (2) entry linkage lignocellulose ammoniation jar (15).

2. The apparatus for continuous lignocellulose processing according to claim 1, wherein the lignocellulose ammonification tank (15) is an anaerobic device, and is connected to a lignocellulose raw material supply device and an ammonia supply device.

3. The continuous lignocellulose processing device according to claim 1, wherein stirrers are arranged in the batching tank (1), the size mixing tank (2) and the pH condition tank (7).

4. Lignocellulose continuous treatment device according to claim 1, characterized in that the heating part of the heating coil (3) is located at the inlet position.

5. The lignocellulose continuous processing device according to claim 1, wherein the heat source of the heating coil (3) is steam, and the steam generated by the flash tank (4) is part of the heat source of the heating coil (3).

6. The lignocellulose continuous treatment device according to claim 1, wherein the reaction pipeline (5) is composed of a plurality of straight pipelines connected in series.

7. The lignocellulose continuous treatment device according to claim 1, wherein the liquid part outlet of the first solid-liquid separation tank (8) is divided into two paths, one path is connected with the first production composite xylanase fermentation tank (16), the outlet of the first production composite xylanase fermentation tank (16) and the other path of the liquid part outlet of the first solid-liquid separation tank (8) are both connected with the first enzymolysis tank (9), the solid part outlet of the first solid-liquid separation tank (8) is divided into two paths, one path is connected with the second production composite cellulase fermentation tank (17), and the outlet of the second production composite cellulase fermentation tank (17) and the other path of the solid part outlet of the first solid-liquid separation tank (8) are both connected with the second enzymolysis tank (10).

8. The lignocellulose continuous treatment device according to claim 7, wherein the outlet of the first enzymolysis tank (9) is divided into two paths, one path of the outlet and the outlet of the second enzymolysis tank (10) are both connected with a second solid-liquid separation tank (11), and the liquid part outlet of the second solid-liquid separation tank (11) and the other path of the outlet of the first enzymolysis tank (9) are connected with a product fermentation tank (12).

9. The lignocellulose continuous treatment device according to claim 7, wherein stirrers are arranged in the first enzymolysis tank (9), the second enzymolysis tank (10) and the product fermentation tank (12).

10. The lignocellulose continuous treatment device according to claim 7, wherein the supernatant of the first solid-liquid separation tank (8) is connected with an evaporator (18) to replenish water for the evaporator (18), condensed water produced by the evaporator (18) is connected with a water tank (14), and the produced steam is used as a heat source for the heating coil (3).