Biomass liquid fuel as well as preparation method and application thereof

Abstract

The invention relates to a process for producing biomass liquid fuel by utilizing cellulose biomass, which comprises the following steps of: firstly, adding a heat carrier and a catalyst into a pre-reaction kettle, heating to 240-280 DEG C, then crushing straws until the length is 0.5-2mm, conveying the crushed straws to a straw powder bin, conveying the crushed straws in the straw powder bin into the pre-reaction kettle by using a straw conveying pump, and feeding the crushed straws into the pre-reaction kettle, in the process that the straw conveying pump conveys the straw into the pre-reaction kettle, air in the straw is extruded out, and the straw, the heat carrier and the catalyst are mixed and degraded under the condition of 240-280 DEG C; the degradation liquid in the pre-reaction kettle enters the first-stage reaction kettle and the three second-stage reaction kettles for cracking. The cracking time is shortened, and energy is saved. The density of the produced biomass liquid fuel is 0.86 g / cm < 3 >, and the biomass liquid fuel can be used as fuel of power machinery and has economic value and utilization value.

Description

[0001] This invention is application number CN202211495524.3, and the invention name is invention patent divisional application for process for producing biomass liquid fuel using biocellulose. The original application date is November 27, 2022. Technical Field

[0002] The invention relates to the technical field of preparation of biomass liquid fuel, and in particular to a process for producing biomass liquid fuel by utilizing biological cellulose. Background Art

[0003] The traditional process of using biocellulose to produce biomass liquid fuel is that there is one secondary reactor with a short reaction time, which needs to be extended; the straw conveying pump can withstand a temperature of 120°C, which is low, and needs to be heated separately in the reactor, which increases the cracking time and wastes energy.

[0004] The traditional process has the disadvantages of long cracking time and waste of energy. The biomass liquid fuel produced is basically tar with a density of 1.2g / cm3. It cannot be used as fuel for power machinery and has no economic value or utilization value. Summary of the invention

[0005] A process for producing biomass liquid fuel using biocellulose comprises the following steps:

[0006] 1) First, add heat carrier and catalyst into the pre-reactor, heat to 240-280° C., then crush the straw into a length of 0.5-3 mm, transport the crushed straw to the straw powder bin, and use a straw conveying pump to convey the crushed straw in the straw powder bin to the pre-reactor through the straw conveying pump. During the process of conveying the straw to the pre-reactor by the straw conveying pump, the air in the straw is squeezed out, and the straw, heat carrier and catalyst are mixed and degraded at 240-280° C. for 30 minutes;

[0007] 2) The degradation liquid in the pre-reactor enters the primary reactor for cracking, and the large biomass particles that have not been completely cracked in the primary reactor overflow into the three secondary reactors in sequence for further cracking. The cracking temperature in the primary reactor and the secondary reactor is 290-330° C. The cracking time is until the cracking is completely completed. The products after cracking are wood vinegar, biomass liquid fuel, natural gas, and a heat carrier mixture containing biochar;

[0008] 3) The heat carrier containing biochar generated in the primary reactor and the secondary reactor enters the separation device to separate the biochar from the heat carrier, the separated heat carrier enters the heat carrier storage tank, and continues to be circulated for the pre-reactor and the primary reactor, the separated biochar containing a small amount of heat carrier is transported to a dispersion tank filled with an extracting liquid for dispersion and extraction, and after dispersion, enters a flat centrifuge for separation, and the separated biochar enters a biochar heating and drying device for drying to become biochar; the separated extract enters a distillation tower for separation, and the extract from the top of the distillation tower is condensed and enters an extracting liquid tank for standby use; the drying temperature of the biochar heating and drying device is 80°C; the heat carrier separated from the bottom of the distillation tower enters a heat carrier storage tank;

[0009] 4) The extract mixture containing part of the heat carrier separated from the extract dispersion tank enters the distillation tower for separation at a separation temperature of 80°C. The separated extract is vaporized from the top of the distillation tower, condensed and enters the extract tank for standby use. The heat carrier separated from the bottom of the distillation tower is transported to the heat carrier storage tank for recycling;

[0010] 5) compressing and transporting the natural gas generated in the primary reactor and the secondary reactor to the storage tank;

[0011] 6) separating the wood vinegar and the biomass liquid fuel into biomass liquid fuel and wood vinegar via a water-oil separator;

[0012] The straw delivery pump can withstand a temperature of 400°C.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention uses three secondary reactors, which shortens the reaction time; the straw conveying pump can withstand a temperature of 400°C, which is high, and no additional heating is required in the reactor, which shortens the cracking time and saves energy.

[0015] 2. The biomass liquid fuel produced by the present invention has a density of 0.86 g / cm3 and can be used as fuel for power machinery, having economic value and utilization value. DETAILED DESCRIPTION

[0016] A process for producing biomass liquid fuel using biocellulose comprises the following steps:

[0017] 1) First, add heat carrier and catalyst into the pre-reactor, heat to 240-280° C., then crush the straw into a length of 0.5-3 mm, transport the crushed straw to the straw powder bin, and use a straw conveying pump to convey the crushed straw in the straw powder bin to the pre-reactor. During the process of conveying the straw to the pre-reactor by the straw conveying pump, the air in the straw is squeezed out, and the straw, heat carrier and catalyst are mixed and degraded at 240-280° C. for 30 minutes;

[0018] 2) The degradation liquid in the pre-reactor enters the primary reactor for cracking, and the large biomass particles that have not been completely cracked in the primary reactor overflow into the three secondary reactors in sequence for further cracking. The cracking temperature in the primary reactor and the secondary reactor is 290-330° C. The cracking time is until the cracking is completely completed. The products after cracking are wood vinegar, biomass liquid fuel, natural gas, and a heat carrier mixture containing biochar;

[0019] 3) The heat carrier containing biochar generated in the primary reactor and the secondary reactor enters the separation device to separate the biochar from the heat carrier, the separated heat carrier enters the heat carrier storage tank, and continues to be circulated for the pre-reactor and the primary reactor, the separated biochar containing a small amount of heat carrier is transported to a dispersion tank filled with an extracting liquid for dispersion and extraction, and after dispersion, enters a flat centrifuge for separation, and the separated biochar enters a biochar heating and drying device for drying to become biochar; the separated extract enters a distillation tower for separation, and the extract from the top of the distillation tower is condensed and enters an extracting liquid tank for standby use; the drying temperature of the biochar heating and drying device is 80°C; the heat carrier separated from the bottom of the distillation tower enters a heat carrier storage tank;

[0020] 4) The extract mixture containing part of the heat carrier separated from the extract dispersion tank enters the distillation tower for separation at a separation temperature of 80°C. The separated extract is vaporized from the top of the distillation tower, condensed and enters the extract tank for standby use. The heat carrier separated from the bottom of the distillation tower is transported to the heat carrier storage tank for recycling;

[0021] 5) compressing and transporting the natural gas generated in the primary reactor and the secondary reactor to the storage tank;

[0022] 6) Separating the wood vinegar and biomass liquid fuel into biomass liquid fuel and wood vinegar via a water-oil separator.

Claims

1. A method for preparing biomass liquid fuel, It is characterized in that The following steps are involved: (1) adding a heat carrier and a catalyst to a pre-reactor, heating the pre-reactor, crushing the straw and conveying it to a straw powder bin, conveying the crushed straw in the straw powder bin to the pre-reactor using a straw conveying pump, squeezing out the air in the straw during the process of conveying the straw to the pre-reactor by the straw conveying pump, and performing mixed pyrolysis and cracking of the straw, the heat carrier and the catalyst; (2) the mixed liquid in the pre-reactor enters the primary reactor for cracking, and the large biomass particles that have not been completely cracked in the primary reactor overflow into the three secondary reactors in sequence for further cracking, and the products after cracking are wood vinegar, biomass liquid fuel, natural gas, and a heat carrier mixture containing biochar; (3) The heat carrier containing biochar generated in the primary reactor and the secondary reactor enters the separation device to separate the biochar from the heat carrier, the separated heat carrier enters the heat carrier storage tank, and continues to be circulated for the pre-reactor and the primary reactor, the separated biochar containing a small amount of heat carrier is transported to a dispersion tank filled with an extracting liquid for dispersion extraction, and after dispersion extraction, enters a flat centrifuge for solid-liquid separation, and the separated biochar enters a biochar heating and drying device for drying to become biochar; the separated extract enters a distillation tower for separation, and the extract from the top of the distillation tower is condensed and enters an extracting liquid tank for standby use; the heat carrier separated at the bottom of the distillation tower enters a heat carrier storage tank; (4) The extract mixture containing part of the heat carrier separated from the extract dispersion tank enters the distillation tower for separation. The separated extract is vaporized from the top of the distillation tower, condensed and enters the extract tank for standby use. The heat carrier separated from the bottom of the distillation tower is transported to the heat carrier storage tank for recycling. (5) compressing the natural gas generated in the primary reactor and the secondary reactor and transporting it to the storage tank; (6) Separating the wood vinegar and biomass liquid fuel into biomass liquid fuel and wood vinegar via a water-oil separator.

2. The preparation method according to claim 1, It is characterized in that In step (1), the straw is crushed to a length of 0.5-2 mm; and the heating temperature is 240-280°C.

3. The preparation method according to claim 1, It is characterized in that The mixed degradation condition in step (1) is degradation at 240-280° C. for 30 minutes.

4. The preparation method according to claim 1, It is characterized in that The cracking temperature in step (2) is 290-330°C.

5. A biomass liquid fuel, It is characterized in that Prepared by the method according to any one of claims 1 to 4.

6. Use of the biomass liquid fuel as claimed in claim 5 in preparing fuel for power machinery.