CN105331413A

CN105331413A - Biomass briquette coal manufactured from modified eucalyptus bark

Info

Publication number: CN105331413A
Application number: CN201510710337.6A
Authority: CN
Inventors: 江东; 黄天; 梁君祚; 梁承悍
Original assignee: Guangxi Guisheng New Energy Science & Technology Co Ltd
Current assignee: GUANGXI KUONENGBA ENERGY TECHNOLOGY DEVELOPMENT CO., LTD.
Priority date: 2015-10-27
Filing date: 2015-10-27
Publication date: 2016-02-17

Abstract

The invention discloses biomass briquette coal manufactured from modified eucalyptus bark. The biomass briquette coal is prepared from, by weight, 40-50 parts of pulverized coal, 30-40 parts of the modified eucalyptus bark, 5-8 parts of maize straw powder, 5-8 parts of soybean straw powder, 5-10 parts of sugarcane leaf powder, 0.5-1 part of calcium oxide, 0.2-0.5 part of magnesium oxide, 1-2 parts of combustion improver and 5-8 parts of binder. The manufacturing process of the modified eucalyptus bark includes the steps that eucalyptus bark is broken into 4-6-cm long strips, the long strips are soaked in a sodium hydroxide solution with the concentration of 1% for 20 min, after being soaked, the long strips are washed with water to be neutral, and the long strips are added into a 60-70% ethanol solution to be soaked for 4-6 h, dried and pulverized into powder of 80-120 meshes. The biomass briquette coal is high in heat stability and reaction activity and has excellent popularization value, and the pollutant content of smoke dust after combustion is reduced.

Description

A kind of biomass coal adopting modification mallee bark to make

Technical field

The present invention relates to moulded coal field, particularly relate to a kind of biomass coal adopting modification mallee bark to make.

Background technology

Moulded coal take fine coal as main raw material, by the machined compression moulding of proportioning, physical strength and shape size required by concrete purposes, has some strength and size and different coal finished product; Moulded coal has that technique is simple, less investment, cost are low, and can obtain and promote coal-fired quality, improve efficiency of combustion, reduce the advantages such as coal burning pollution, is therefore used widely in people's daily life and industrial production as fuel.But coal resources are fewer and feweri, people start more and more to focus on waste resource to be applied in moulded coal, develop economic model capable of circulation.

According to statistics, nearly 3,130,000 hectares of China's eucalyptus area, year cutting estimation about 10%, about 300,000 hectares, wherein per hectare produces about 100 ~ 120 tons, timber, and the content of mallee bark is 12 ~ 15%, and estimation bark output is 3,600,000 ~ 4,000,000 tons/year; Eucalyptus carries out adding man-hour, all will remove edge skin material, and these discarded mallee bark are often abandoned in vain and burn, the recycling of mallee bark, are necessary concerning environment protection and save energy.

Summary of the invention

The invention provides a kind of biomass coal adopting modification mallee bark to make, adopt modification mallee bark as moulded coal raw material, achieve the recycling of waste resource.

For achieving the above object, technical scheme of the present invention is:

The biomass coal adopting modification mallee bark to make, comprises the raw material of following weight part: coal dust 40 ~ 50 parts, modification mallee bark 30 ~ 40 parts, corn stalk powder 5 ~ 8 parts, 5 ~ 8 parts, soybean stalk powder, 5 ~ 10 parts, Caulis Sacchari sinensis leaf powder, 0.5 ~ 1 part, calcium oxide, 0.2 ~ 0.5 part, magnesium oxide, ignition dope 1 ~ 2 part, binding agent 5 ~ 8 parts.

Wherein, the manufacture craft of described modification mallee bark is: strip mallee bark being broken into 4 ~ 6cm, then being soaked in concentration is in the sodium hydroxide solution of 1%, soak time is 20min, neutrality is washed with water to after immersion, add the alcohol solution dipping 4 ~ 6h of 60 ~ 70% again, dry, break into 80 ~ 120 object powder.

Preferably, the biomass coal that described employing modification mallee bark makes comprises the raw material of following weight part: coal dust 45 parts, modification mallee bark 35 parts, corn stalk powder 7 parts, 7 parts, soybean stalk powder, 8 parts, Caulis Sacchari sinensis leaf powder, 0.8 part, calcium oxide, 0.3 part, magnesium oxide, ignition dope 1.5 parts, binding agent 7 parts.

Preferably, described ignition dope is NaCl, NaNO ₃, Na ₂cO ₃, KNO ₃, one or more combination in KCl.

Preferably, described ignition dope is preferably by NaCl, Na ₂cO ₃the weight ratio composition of 3:2:2 is pressed with KCl.

Preferably, described binding agent is the mixture of Sodium salts humic acids and clay.

Preferably, described binding agent is preferably made up of by the weight ratio of 3:1 Sodium salts humic acids and clay.

The biomass coal adopting modification mallee bark to make, has following advantage:

(1) modification is carried out to mallee bark, first with weakly alkaline sodium hydroxide solution, the xylogen in bark and Mierocrystalline cellulose are softened, the microvoid structure of mallee bark is improved again with ethanolic soln, when being convenient to burn, oxygen enters in the microvoid structure of mallee bark, thus increase the contact area of oxygen and moulded coal, improve the burn-off rate of moulded coal; The sulfur-fixing rate of moulded coal can also be improved in addition;

(2) with the addition of biomass fuel corn stalk powder, soybean stalk powder and Caulis Sacchari sinensis leaf powder, effectively reduce the burning-point of moulded coal, moulded coal is lighted fast;

(3) with the addition of calcium oxide as sulphur-fixing agent, the sulfur fixation of moulded coal can be strengthened; In addition, calcium oxide has water sorption, can improve water resistance and the intensity of moulded coal;

(4) biomass coal that described employing modification mallee bark makes employs the biomass fuel of larger proportion, achieve the object turning waste into wealth, make the best use of everything, and owing to having carried out modification to mallee bark, the biomass coal Heat stability is good that described employing modification mallee bark is made, reactive behavior are high, smoke contamination thing content after burning is low, has good promotional value.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention and range of application are not limited to following examples:

One, the biomass coal adopting modification mallee bark to make

Embodiment 1

A kind of biomass coal adopting modification mallee bark to make, comprise the raw material of following weight part: coal dust 45 parts, modification mallee bark 35 parts, corn stalk powder 7 parts, 7 parts, soybean stalk powder, 8 parts, Caulis Sacchari sinensis leaf powder, 0.8 part, calcium oxide, 0.3 part, magnesium oxide, ignition dope 1.5 parts, binding agent 7 parts, wherein, ignition dope is by NaCl, Na ₂cO ₃press the weight ratio composition of 3:2:2 with KCl, binding agent is made up of by the weight ratio of 3:1 Sodium salts humic acids and clay.

The manufacture craft of modification mallee bark is: strip mallee bark being broken into 4 ~ 6cm, and being then soaked in concentration is in the sodium hydroxide solution of 1%, and soak time is 20min, neutrality is washed with water to after immersion, add the alcohol solution dipping 6h of 70% again, dry, break into 100 object powder.

Embodiment 2

A kind of biomass coal adopting modification mallee bark to make, comprise the raw material of following weight part: coal dust 40 parts, modification mallee bark 40 parts, corn stalk powder 5 parts, 5 parts, soybean stalk powder, 10 parts, Caulis Sacchari sinensis leaf powder, 0.5 part, calcium oxide, 0.5 part, magnesium oxide, ignition dope 2 parts, binding agent 5 parts, wherein, ignition dope is by NaCl, NaNO ₃and KNO ₃form by the weight ratio of 1:2:1, binding agent is made up of by the weight ratio of 1:1 Sodium salts humic acids and clay.

The manufacture craft of modification mallee bark is: strip mallee bark being broken into 4 ~ 6cm, and being then soaked in concentration is in the sodium hydroxide solution of 1%, and soak time is 20min, neutrality is washed with water to after immersion, add the alcohol solution dipping 5h of 65% again, dry, break into 120 object powder.

Embodiment 3

A kind of biomass coal adopting modification mallee bark to make, comprise the raw material of following weight part: coal dust 50 parts, modification mallee bark 30 parts, corn stalk powder 8 parts, 8 parts, soybean stalk powder, 5 parts, Caulis Sacchari sinensis leaf powder, 1 part, calcium oxide, 0.2 part, magnesium oxide, ignition dope 1 part, binding agent 8 parts, wherein, ignition dope is by NaCl, KCl and KNO ₃form by the weight ratio of 2:1:2, binding agent is made up of by the weight ratio of 2:1 Sodium salts humic acids and clay.

The manufacture craft of modification mallee bark is: strip mallee bark being broken into 4 ~ 6cm, and being then soaked in concentration is in the sodium hydroxide solution of 1%, and soak time is 20min, neutrality is washed with water to after immersion, add the alcohol solution dipping 4h of 60% again, dry, break into 80 object powder.

Two, the biomass coal performance test adopting modification mallee bark to make

1. strength test

By the above-mentioned embodiment sample prepared, carry out strength test, result shows that biomass type coal sample cold strength of the present invention is high, falls not easily broken, refers to table 1.

The biomass coal strength test results table that table 1 adopts modification mallee bark to make

2. combustionproperty test

Get above-mentioned 3 the embodiment samples prepared respectively, carry out combustion test, measure following test item, test-results refers to table 2.

The biomass coal combustionproperty table with test results that table 2 adopts modification mallee bark to make

(3) measurement result

Result shows: from inner outside release of heat during the present invention's 3 embodiment sample combustion, ignition temperature is reduced to 200-300 DEG C, and speed of igniting is accelerated, and flame lengthens, and burning is more abundant, adds the internal flame temperature of flame, the bulk temperature of flame is improved.

Can be drawn the following conclusions by above the performance test results: the biomass type calorific value of coal that employing modification mallee bark of the present invention makes, thermo-efficiency are high, SO ₂quantity discharged, smoke discharge amount lower, raw material is mainly agriculture production waste, and cost reduces 30-60%.

Above content can not assert that specific embodiment of the invention is confined to these explanations; for general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; some simple deduction or replace can also be made, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.

Claims

1. the biomass coal adopting modification mallee bark to make, it is characterized in that, comprise the raw material of following weight part: coal dust 40 ~ 50 parts, modification mallee bark 30 ~ 40 parts, corn stalk powder 5 ~ 8 parts, 5 ~ 8 parts, soybean stalk powder, 5 ~ 10 parts, Caulis Sacchari sinensis leaf powder, 0.5 ~ 1 part, calcium oxide, 0.2 ~ 0.5 part, magnesium oxide, ignition dope 1 ~ 2 part, binding agent 5 ~ 8 parts;

The manufacture craft of described modification mallee bark is: strip mallee bark being broken into 4 ~ 6cm, then being soaked in concentration is in the sodium hydroxide solution of 1%, soak time is 20min, neutrality is washed with water to after immersion, add the alcohol solution dipping 4 ~ 6h of 60 ~ 70% again, dry, break into 80 ~ 120 object powder.

2. the biomass coal of employing modification mallee bark making according to claim 1, it is characterized in that, comprise the raw material of following weight part: coal dust 45 parts, modification mallee bark 35 parts, corn stalk powder 7 parts, 7 parts, soybean stalk powder, 8 parts, Caulis Sacchari sinensis leaf powder, 0.8 part, calcium oxide, 0.3 part, magnesium oxide, ignition dope 1.5 parts, binding agent 7 parts.

3. the biomass coal of employing modification mallee bark making according to claim 1 and 2, it is characterized in that, described ignition dope is NaCl, NaNO ₃, Na ₂cO ₃, KNO ₃, one or more combination in KCl.

4. the biomass coal of employing modification mallee bark making according to claim 3, it is characterized in that, described ignition dope is by NaCl, Na ₂cO ₃the weight ratio composition of 3:2:2 is pressed with KCl.

5. the biomass coal of employing modification mallee bark making according to claim 1 and 2, it is characterized in that, described binding agent is the mixture of Sodium salts humic acids and clay.

6. the biomass coal of employing modification mallee bark making according to claim 5, it is characterized in that, described binding agent is made up of by the weight ratio of 3:1 Sodium salts humic acids and clay.