Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Continuous hydrothermal carbonization method

A technology for hydrothermal carbonization and hydrothermal carbonization, which is applied in the field of agricultural and forestry waste utilization, can solve problems such as difficulty in application, and achieve the effects of high charging efficiency, low alkali metal content and high calorific value

Active Publication Date: 2022-05-13
UNIV OF SCI & TECH BEIJING
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above scientific researches all need to slurry the biomass raw materials, and the fluid raw materials are injected into the reaction vessel through a high-pressure pump, but it is difficult to apply to large agricultural and forestry wastes, municipal garden trimmings, and food processing residues.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Continuous hydrothermal carbonization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029]This example provides a continuous hydrothermal carbonization method using biomass solid particles as raw material. Taking soybean straw as an example, the process is as follows figure 1 shown, including the following steps:

[0030] (1) Use the raw material pretreatment system to pretreat the raw materials. Specifically, sieve the soybean straw to remove mud, gravel, iron flakes, etc., you can use a vibrating screen or other screening equipment, which needs to be removed during the sieving process. The entrainment of waste rubber and rags can be realized by using existing equipment or manpower, and then, the soybean straw is cut into pieces by a shearing machine, and the length of the straw is controlled to be less than 10cm. Conveying to the top of the charging tank;

[0031] (2) Close the feeding port of the charging tank, open the pressure relief valve, discharge the high-temperature exhaust gas in the charging tank to the high-temperature exhaust gas cooling system...

Embodiment 2

[0038] This embodiment provides a continuous hydrothermal carbonization method using biomass solid particles as raw materials. Taking waste wood as an example, the process is as follows figure 1 shown, including the following steps:

[0039] (1) Use a crusher to crush large pieces of waste wood, and control the particle size of the waste wood to be less than 10cm. The crushed waste wood is weighed and transported to the top of the charging tank by a spiral conveying pipeline;

[0040] (2) Close the feeding port of the charging tank, open the pressure relief valve, discharge the high-temperature exhaust gas in the charging tank to the high-temperature exhaust gas cooling system, close the pressure relief valve when the internal pressure of the charging tank is equal to the atmospheric pressure, and open the upper At the feed port, put the waste wood into the charging tank, and the loading capacity is 1.8t each time. After the filling is completed, close the upper charging port...

Embodiment 3

[0046] This embodiment provides a continuous hydrothermal carbonization method using biomass solid particles as a raw material, taking garden trimmings as an example, the flow process is as follows figure 1 shown, including the following steps:

[0047] (1) Use the raw material pretreatment system to pretreat the raw materials. Specifically, screen the garden prunings to remove mud, gravel, and iron pieces. Vibrating screens or other screening equipment can be used, which need to be removed during the screening process. The entrained waste rubber and rags can be realized by using existing equipment or manpower, and then, the garden prunings are shredded by a shearing machine, and the length of the straw is controlled to be less than 10 cm. The conveying pipeline is conveyed to the top of the charging tank;

[0048] (2) Close the feeding port of the charging tank, open the pressure relief valve, discharge the high-temperature exhaust gas in the charging tank to the high-temper...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
heating valueaaaaaaaaaa
heating valueaaaaaaaaaa
Login to View More

Abstract

The invention discloses a continuous hydrothermal carbonization method which comprises the following steps: (1) pretreating a biomass raw material to obtain biomass solid particles, and conveying the biomass solid particles to a charging tank by a feeding system; (2) controlling the pressure of the charging tank and the high-pressure hydrothermal reaction kettle by using a pressure control system, and adding the normal-pressure biomass solid particles in the feeding system into the high-pressure hydrothermal reaction kettle, so that the hydrothermal carbonization reaction is continuously carried out; (3) completing carbonization of biomass solid particles by using the high-pressure hydrothermal reaction kettle; (4) carrying out primary solid-liquid separation on the carbonized product to obtain a high-temperature carbonized filtrate and a high-water-content carbide, and returning the high-temperature carbonized filtrate to the high-pressure hydrothermal reaction kettle to continuously participate in the carbonization reaction; and (5) treating the high-water-content carbide to obtain biomass hydrothermal carbon and carbonized waste liquid. The carbonization efficiency is improved, the carbonization energy consumption is reduced, and the method is suitable for wide popularization and application.

Description

technical field [0001] The disclosure belongs to the technical field of utilization of agricultural and forestry waste, and relates to a continuous hydrothermal carbonization method, in particular to a continuous hydrothermal carbonization method using biomass solid particles as raw materials. Background technique [0002] As a large agricultural country, China produces a large amount of agricultural biomass waste every year. In addition, there are also a large amount of forestry biomass waste and municipal garden biomass waste. If it can be efficiently applied to the field of industrial production, it will effectively reduce industrial production. CO2 emissions, while increasing the use value of biomass waste. Hydrothermal carbonization technology is to place biomass and water in a high-pressure reactor according to a certain ratio, and form subcritical water by heating the reactor, and the biomass undergoes hydrolysis, dehydration, decarboxylation, polycondensation and aro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/44
CPCC10L5/442C10L5/445Y02E50/30Y02E50/10
Inventor 王广伟王丽丽王川宁晓钧于春梅燕培钦
Owner UNIV OF SCI & TECH BEIJING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products