CN106281551A - A kind of sawdust based biomass granule of alternative fire coal and preparation method thereof - Google Patents

Abstract

nullThe invention discloses the sawdust based biomass granule of a kind of alternative fire coal，On the one hand sawdust carbonization is processed the most modified，Improve toughness and the density of DIC granule，The combustion heat value that improve sawdust carbon residue the volatile matter reducing in combustion process，The waste gas sulfur content of discharge is low free from environmental pollution，On the other hand，Rice is obstructed、Dove tree branch、After sunflower straw carries out fermentation process，The structure sheaf changing raw material forms the organizational structure of densification，And form the organic material of high-load，Improve organic constituent，Again by modification yellow mud、Wood fiber powder、Sodium metaaluminate adds continuation fermentation process，And then the combustible in raising organic matter material，Last other effective auxiliary agents of compatibility again are extruded，The sawdust based biomass granular fuel high heating value prepared、Have good burning performance，Alternative fire coal harmful gas component content when the industrial high temperatures such as lime shaft kiln smelt burning is extremely low，The harmful gas of discharge is few，There is environmental benefit.

Description

A kind of sawdust based biomass granule of alternative fire coal and preparation method thereof

Technical field

The present invention relates to biomass fuel technical field, particularly relate to the sawdust based biomass granule of a kind of alternative fire coal And preparation method thereof.

Background technology

Along with mankind's increase day by day to energy demand, now widely used oil, coal, natural gas etc. are non-renewable The energy be faced with day by day exhausted problem.The energy crisis that will face to solve the mankind be necessary to develop reproducible newly The energy replaces non-renewable Fossil fuel.Biomass energy, as a kind of cheap, regenerative resource of cleaning, is the most more come More being paid close attention to by people widely, China is as large agricultural country, in the raw material supply of biomass energy, energy demand, government's political affairs The aspects such as the support of plan all have greater advantage.Sawdust, straw source is abundant, and with low cost, sawdust sulfur content is the lowest simultaneously, with it The biomass granule fuel substitute fossil fuels prepared for raw material, to preserving the ecological environment, Development of Social Economy, implementing the energy can Sustainable development strategy has major and immediate significance.But traditional biomass granule fuel utilizing sawdust straw to prepare exists Calorific value slagging scorification boiler low, easy uses dangerous, sulfur content to exceed standard many defects such as pollution environment, ash are big.

Summary of the invention

The object of the invention is contemplated to make up the defect of prior art, it is provided that the sawdust based biomass of a kind of alternative fire coal Granule and preparation method thereof.

The present invention is achieved by the following technical solutions:

The sawdust based biomass granule of a kind of alternative fire coal, is prepared by the raw materials in: sawdust 108-113, rice stalk 50-55, dove tree branch 16-18, sunflower straw 39-43, wood fiber powder 16-19, yellow mud 12-14, calcium carbonate 6-8, nanometer Magnesium oxide 1.8-2.1, gelatin 3-4, solid alcohol 5-7, ethylenediamine 2-3, sodium metaaluminate 0.8-1.2, suitable quantity of water.

The manufacture method of the sawdust based biomass granule of described a kind of alternative fire coal, comprises the following steps:

(1) sawdust is put in retort at a temperature of 450-500 DEG C, isolation air carbonization 20-30 minute, it is cooled to room temperature Add nano magnesia, gelatin grinds 40-50 minute；

(2) being soaked 1-2 hour by yellow mud 5-10wt% hydrochloric acid solution, washing, to neutral, adds water at 80-100 DEG C at ultrasound wave Managing 8-10 minute, then soak 1-2 hour with 8-12wt% sodium hydroxide solution, washing, to neutral, adds water ultrasonic at 80-100 DEG C Ripple processes 8-10 minute, is subsequently adding solid alcohol, ethylenediamine grinding 20-30 minute, dries and prepare modified yellow mud；

(3) by rice stalk, dove tree branch, sunflower straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put into fermentation vat In, controlling fermentation vat temperature at 30-50 DEG C, humidity is 50-60%, after fermentation process 20-30 hour, adds modified yellow mud, wooden Fiber powder, sodium metaaluminate stir continuation fermentation 10-20 days, are cooled to room temperature and put into and be crushed to 60-80 mesh in pulverizer；

(4) by step (1), the mixing of (3) material stirring, adding suitable quantity of water and other residual components stirring and evenly mixing, feeding is squeezed into Type machine, is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm with the briquetting pressure of 45MPa, is dried, discharging.

The invention have the advantage that present invention process simple operations is easy, on the one hand sawdust carbonization processed the most modified, Improve toughness and the density of DIC granule, the combustion heat value that improve sawdust carbon residue the volatilization reducing in combustion process Point, the waste gas sulfur content of discharge is low free from environmental pollution, on the other hand, rice stalk, dove tree branch, sunflower straw is carried out at fermentation After reason, change the structure sheaf of raw material and form the organizational structure of densification, and form the organic material of high-load, improve organic Matter constituent, then modification yellow mud, wood fiber powder, sodium metaaluminate are added continuation fermentation process, and then improve organic former Combustible in material, other effective auxiliary agents of compatibility are extruded the most again, prepare sawdust based biomass granular fuel high heating value, Having good burning performance, alternative fire coal harmful gas component content when the industrial high temperatures such as lime shaft kiln smelt burning is extremely low, row The harmful gas put is few, has environmental benefit.

Detailed description of the invention

The sawdust based biomass granule of a kind of alternative fire coal, is prepared by the raw materials in: sawdust 108, rice stalk 50, dove tree branch 16, sunflower straw 39, wood fiber powder 16, yellow mud 12, calcium carbonate 6, nano magnesia 1.8, gelatin 3, solid Body ethanol 5, ethylenediamine 2, sodium metaaluminate 0.8, suitable quantity of water.

The manufacture method of the sawdust based biomass granule of described a kind of alternative fire coal, comprises the following steps:

(1) sawdust is put in retort at a temperature of 450 DEG C, isolation air carbonization 20 minutes, be cooled to room temperature addition and receive Rice magnesium oxide, gelatin grind 40 minutes；

(2) being soaked 1 hour by yellow mud 5-10wt% hydrochloric acid solution, washing is to neutral, and add water ultrasonic Treatment 8 points at 80 DEG C Clock, then soak 1 hour with 8-12wt% sodium hydroxide solution, washing is to neutral, and add water ultrasonic Treatment 8 minutes at 80 DEG C, so Rear addition solid alcohol, ethylenediamine grind 20-30 minute, dry and prepare modified yellow mud；

(3) by rice stalk, dove tree branch, sunflower straw with the hot-water soak 10 hours of 60 DEG C, filter and put in fermentation vat, control Fermentation vat temperature is at 30 DEG C, and humidity is 50%, and fermentation process, after 20 hours, adds modified yellow mud, wood fiber powder, sodium metaaluminate Stir continuation fermentation 10 days, is cooled to room temperature and puts into and be crushed to 60 mesh in pulverizer；

(4) by step (1), the mixing of (3) material stirring, adding suitable quantity of water and other residual components stirring and evenly mixing, feeding is squeezed into Type machine, is squeezed into a diameter of 5mm, the cylindrical particle of a length of 3cm with the briquetting pressure of 45MPa, is dried, discharging.

The technical parameter index using the sawdust based biomass granule of present invention production is as follows:

(1) anti-dropping intensity: 99.6%；

(2) sulfur content: 0.276%, less than the standard of special low-sulfur coal 0.50%；

(3) calorific value: 24.26MJ/kg, in the range of high combustion value coal (calorific value is 24.01-27.00MJ/kg)；

(4) volatile matter: 17.26%.

Claims (2)

1. the sawdust based biomass granule of an alternative fire coal, it is characterised in that be prepared by the raw materials in: sawdust 108-113, rice stalk 50-55, dove tree branch 16-18, sunflower straw 39-43, wood fiber powder 16-19, yellow mud 12-14, carbon Acid calcium 6-8, nano magnesia 1.8-2.1, gelatin 3-4, solid alcohol 5-7, ethylenediamine 2-3, sodium metaaluminate 0.8-1.2, appropriate Water.

The manufacture method of the sawdust based biomass granule of a kind of alternative fire coal the most according to claim 1, its feature exists In comprising the following steps:

(1) sawdust is put in retort at a temperature of 450-500 DEG C, isolation air carbonization 20-30 minute, it is cooled to room temperature Add nano magnesia, gelatin grinds 40-50 minute；

(2) being soaked 1-2 hour by yellow mud 5-10wt% hydrochloric acid solution, washing, to neutral, adds water at 80-100 DEG C at ultrasound wave Managing 8-10 minute, then soak 1-2 hour with 8-12wt% sodium hydroxide solution, washing, to neutral, adds water ultrasonic at 80-100 DEG C Ripple processes 8-10 minute, is subsequently adding solid alcohol, ethylenediamine grinding 20-30 minute, dries and prepare modified yellow mud；

(3) by rice stalk, dove tree branch, sunflower straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put into fermentation vat In, controlling fermentation vat temperature at 30-50 DEG C, humidity is 50-60%, after fermentation process 20-30 hour, adds modified yellow mud, wooden Fiber powder, sodium metaaluminate stir continuation fermentation 10-20 days, are cooled to room temperature and put into and be crushed to 60-80 mesh in pulverizer；

(4) by step (1), the mixing of (3) material stirring, adding suitable quantity of water and other residual components stirring and evenly mixing, feeding is squeezed into Type machine, is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm with the briquetting pressure of 45MPa, is dried, discharging.