CN103952202A

CN103952202A - Clean and environment-friendly straw briquette coal and preparation method thereof

Info

Publication number: CN103952202A
Application number: CN201410207415.6A
Authority: CN
Inventors: 宁巨忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-16
Filing date: 2014-05-16
Publication date: 2014-07-30

Abstract

The invention discloses clean and environment-friendly straw briquette coal and a preparation method thereof. The environment-friendly straw briquette is processed by adding finish-washed coal, coal slime, gangue, additive and a binder into straw materials and mixing through scientific preparation under action of a certain pressure. The clean and environment-friendly straw briquette coal provides a clean and environment-friendly biological energy source. Compared with raw coal, the clean and environment-friendly straw briquette coal is good in gas permeability, higher in heating efficiency and more sufficient in combustion, so that pollution on environment is reduced.

Description

A kind of clean environment firendly stalk moulded coal and preparation method thereof

Technical field

The present invention designs moulded coal production field, is specifically related to a kind of clean environment firendly stalk moulded coal and preparation method thereof.

Background technology

1, coal mining and the processing impact on environment, in China, has abundant coal resources, is Chinese main energy sources, but the development and utilization of coal has produced huge pressure to environment at present.Stockpile and reach 3,000,000,000 tons according to the national spoil of current statistics, utilization ratio only accounts for 36.2 ℅, spoil also can give off the obnoxious flavoures such as volume of smoke and sulfurous gas, carbon monoxide, hydrogen sulfide naturally, in the washing process of coal, there are a large amount of coal slimes to produce, form a large amount of dust, environment is caused to severe contamination.

2, coal fire discharged a large amount of dirt causes the severe contamination to environment, enters every year the sulfurous gas of dust 87 ℅ of carbonic acid gas, 79 ℅ of 80 ℅ in the pollutent of atmosphere, the nitrogen peroxide of 69 ℅ derives from directly using of coal.

3, moulded coal have advantages of compared with raw coal numerous, sufficient combustion, discharge of noxious gases is few.

4, be on the verge of the excessive emissions of carbonic acid gas in exhaustion and process combustion along with fossil fuel resource, on the impact of global climate, it should be noted that the possibility as fuel of renewable energy source material, for example, various crop seed shells, stalk, timber bits etc., wherein, stalk is a kind of well clean renewable energy resources, and its mean content of sulfur only has 3 ‰, after measured: stalk calorific value is about 18000kj/kg, be equivalent to 72% of standard coal, be equivalent to the more than 80% of civil coal.Only need to change its physical aspect, just can directly replace raw coal completely.

Summary of the invention

The object of this invention is to provide a kind of clean environment firendly stalk moulded coal and preparation method thereof, add stalk to mix with fine purifiation coal, coal slime, spoil, additive, tackiness agent, under certain pressure effect, be processed as environment-friendly coal through science.Make pollutent become clean fuel, improve straw burning performance, improve utilising efficiency, broadened application scope, has saved the energy, has protected again environment, makes coal production, processing and comprehensive utilization form benign cycle.

For solving the problems of the technologies described above, a kind of clean environment firendly stalk of the present invention moulded coal and preparation method thereof step is as follows:

1) be Wheat Straw grain by Wheat Straw chopping, cornstalk be ground into cornstalk grain and again Wheat Straw grain mixed according to certain ratio with cornstalk grain.

2) coal slime is added to additive with fine purifiation coal, spoil, stalk after stirrer stirs together with broken, screening, ensure that the granularity of coal slime accounts for more than 80% below 3mm, additive is mainly sulfur elimination and coal modifier.

3) by stalk, fine purifiation coal, coal slime, spoil mix and blend by a certain percentage, also need to add additive, tackiness agent, water therebetween.The weight ratio of stalk, fine purifiation coal, coal slime, spoil, additive, tackiness agent, water is: 20:30:25:22:1:2 total amount moisture content should be controlled 18%-20% left and right.After each raw material being mixed in this ratio, obtain raw mixture, after mixture completes, need to place 5 to 8 its modifications of angel.

4) raw mixture forming is stirred and adds and be pressed into olive-type with Special forming machine under normal temperature environment through stirrer.

5) moulded coal of moulding is reached to multiple-layer airing machine and dry, the time is within 1.5 to 2 hours, to obtain dry clean environment firendly stalk moulded coal finished product.

6) clean environment firendly stalk moulded coal finished product is divided into two kinds of industrial and civil versions, and specification is 10cm × 7cm × 5cm and 8cm × 5cm × 3cm respectively.

Above-mentioned steps 1) in the grain length of Wheat Straw grain be 1 mm to 3mm, the grain length of described maize straw grain is 1 mm to 3mm, the blending ratio of Wheat Straw grain and maize straw grain is 3:5, described blending ratio is weight ratio.

The present invention is with respect to prior art, and beneficial effect is:

1, use straws used for preparing fuel, solved the problem that stalk cannot be processed, can effectively utilize the discarded farm crop in rural area, protection of the environment, turns waste into wealth.

2, use stalk as fuel, substituted traditional fossil oil, thereby alleviated energy scarcity, meanwhile, because its calorific value of straw burning is higher, stalk moulded coal can provide the more energy.

3, clean environment firendly stalk moulded coal is compared with raw coal, and good permeability, thermo-efficiency are higher, burn more abundant, and dust total release can reduce more than 70%.The large portion of CO or all burning, add SO after sulfur elimination ₂quantity discharged can reduce 45-70%, NO _xthe quantity discharged of the objectionable impuritiess such as benzopyrene can reduce more than 30%, has good energy-saving benefit and environmental benefit.

4, in the process of preparing clean environment firendly stalk moulded coal, add treatment agent and coal modifier, can obtain desirable captured sulfur result and improve flame internal flame temperature in low temperature, high temperature section.Make moulded coal perfect combustion, thereby reached industry and coal consumption of living standard.

5, adopt stalk and maize straw as stalk, solved single maize straw central zone incomplete combustion, single Wheat Straw is easy-formation, the too fast problem of burning not, thereby has improved stalk type burning of coal effect.

Brief description of the drawings

Fig. 1 is preparation technology's schema of the present invention.

Embodiment

Below in conjunction with the drawings and specific embodiments, further set forth the present invention:

1, the preparation method of a kind of clean environment firendly stalk of the present invention moulded coal comprises the following steps:

1) be Wheat Straw grain by Wheat Straw chopping, cornstalk be ground into cornstalk grain and ensure that granularity is less than 3mm, then Wheat Straw grain is mixed according to certain ratio with cornstalk grain, the Wheat Straw of mixing and maize straw are pressed into stalk piece; The grain length of Wheat Straw grain be 1mm to 3mm, the grain length of described maize straw grain be 1mm to 3mm, the blending ratio of Wheat Straw grain and maize straw grain is 3:5.

4) raw mixture forming is stirred and adds and be pressed into olive-type with Special forming machine under normal temperature environment through stirrer;

6) clean environment firendly stalk moulded coal finished product is divided into two kinds of industrial and civil versions, and specification is respectively 10cm × 7cm × 5cm and 8cm × 5cm × 3cm.

Claims

1. the preparation method of a clean environment firendly stalk moulded coal comprises the following steps:

1) be Wheat Straw grain by Wheat Straw chopping, cornstalk be ground into cornstalk grain, then Wheat Straw grain is mixed according to certain ratio with cornstalk grain, the Wheat Straw of mixing and maize straw are pressed into stalk piece; The grain length of Wheat Straw grain be 1mm to 3mm, the grain length of described maize straw grain be 1mm to 3mm, the blending ratio of Wheat Straw grain and maize straw grain is 3:5;

?2) coal slime is added to additive with fine purifiation coal, spoil, stalk after stirrer stirs together with broken, screening, ensure that the granularity of coal slime accounts for more than 80% below 3mm;

3) by stalk, fine purifiation coal, coal slime, spoil mix and blend by a certain percentage, also need to add additive, tackiness agent, water therebetween; The weight ratio of stalk, fine purifiation coal, coal slime, spoil, additive, tackiness agent, water is: 20:30:25:22:1:2 total amount moisture content should be controlled 18%-20% left and right; After each raw material being mixed in this ratio, obtain raw mixture, after mixture completes, need to place 5 to 8 its modifications of angel;

5) moulded coal of moulding is reached to multiple-layer airing machine and dry, the time is within 1.5 to 2 hours, to obtain dry clean environment firendly stalk moulded coal finished product;

2. the preparation method of a kind of clean environment firendly stalk moulded coal according to claim 1, it is characterized by: above-mentioned steps 1) in the grain length of Wheat Straw grain be 1 mm to 3mm, the grain length of described maize straw grain is 1 mm to 3mm, the blending ratio of Wheat Straw grain and maize straw grain is 3:5, and described blending ratio is weight ratio.

3. a kind of preparation method of clean environment firendly stalk moulded coal according to claim 2, is characterized in that: the grain length of stalk grain is less than 3mm.

4. the preparation method of a kind of clean environment firendly stalk moulded coal according to claim 1, is characterized in that: above-mentioned steps 3) in additive be mainly sulfur elimination and coal modifier.