CN1382625A

CN1382625A - Process for preparing activated carbon from bamboo

Info

Publication number: CN1382625A
Application number: CN 02112039
Authority: CN
Inventors: 陈文照; ***; 徐贤庚
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-09
Filing date: 2002-06-09
Publication date: 2002-12-04

Abstract

An activated bamboo carbon is prepared from choosing raw material, loading raw material in kiln, smoking for dewatering, dry distilling for charring it, refining, spraying steam and sealing kiln. Its advantages are physically activating it thoroughly, high adsorbability and electric conductivity, high output rate and no environmental pollution.

Description

A kind of process for preparing activated carbon from bamboo

Technical field

The present invention relates to a kind of technology of making charcoal, relate in particular to a kind of process of producing bamboo activated carbon of firing.

Background technology

Touching gac in the actual life, is raw material with the charcoal mainly, by secondary combustion, utilizes the stack gas activation, from timber to the black wood charcoal, utilization ratio has only 28%, and in second time reactivation process, a large amount of charcoal molecules are run away, and per three tons of charcoals can only reclaim one ton of gac, and the resource consumption is too big.Have kind of a chemical method to produce gac, the rate of recovery is slightly high, but the contaminated wastewater of producing is serious, influences environment protection.Application number is 98115886.2 application for a patent for invention by retrieval, discloses a kind of bamboo charcoal special processes.But its every performance of bamboo charcoal such as wettability power, deodorizing capability, barbecue and screening ability are all good not as gac.

Summary of the invention

The present invention is directed to the above deficiency of prior art, and provide a kind of production technique simple, pollution-free, the process for preparing activated carbon from bamboo that every performance index energy and wood activated charcoal match in excellence or beauty.

Purpose of the present invention, adopt following method to realize:

A kind of process for preparing activated carbon from bamboo is to comprise following production process:

1, material choice operation: mao bamboon is sawn into thick bamboo tube, and the back of drying in the shade is stand-by;

2, raw material loading of kiln operation: mao bamboon is loaded in the kiln according to certain rules, and clamming stays a burning osculum;

3, smoke the cigarette dehydration procedure: kiln temperature is controlled at about 25 ℃-105 ℃, steams cigarette dehydration 6-10 days with flue gas;

4, dry distillation charring operation: be warming up in the kiln about 150 ℃-300 ℃, bamboo charcoal is dry distillation charring under the state of partial vacuum, keeps 4 days;

5, refining procedure: open wicket, be warmed up to 700 ℃-1000 ℃ in the kiln, increase oxygen supply, kept 1 hour;

6, spray steam operation: open kiln top gas orifice,, seal wicket and chimney again toward the interior water spray of kiln steam;

7, envelope firer preface: with the bamboo charcoal after jet at kiln inner sealing kiln discharge after 4 days.

The present invention compared with prior art, smoke the activated carbon from bamboo that cigarette method and partial vacuum burning techniques are fired owing to adopted, make bamboo charcoal physically activated thoroughly, got through the bamboo charcoal micropore, launched the specific surface area of bamboo charcoal significantly, its specific surface area is brought up to 500-800 square centimeter/gram by original 192-360 square centimeter/gram, is 2-3 times of prior art.The activated energy that strengthens the charcoal molecule of bamboo charcoal has fundamentally improved moisture absorption, the deodorizing capability of bamboo charcoal, every performance index can and wood activated charcoal match in excellence or beauty, and technology is simple, and is with low cost, draws materials easily, rate of recovery height, production process is pollution-free, is the pure natural environment protection product.

Specific implementation method

Production technique of the present invention comprises following several process:

One, material choice operation: adopt the 5-8 bamboo mao bamboon in age, be sawn into 2-2.5 rice Long Circle thick bamboo tube, the loading of kiln in 4 days of drying in the shade;

Two, raw material loading of kiln operation: according to diameter, from the inside to surface, interior thick outer thin, standing upside down is loaded in the kiln with circular thick bamboo tube, and the sealing wicket stays a little burning to steam mouth;

Three, smoke the cigarette dehydration procedure: advancing the quirk fuel combustion, in the control temperature 25 ℃-105 ℃ (about), smoke the 8 day time of cigarette dehydration with stack gas;

Four, dry distillation charring operation: the former bamboo after last operation, its moisture content are all discharged, and continue to be warmed up to 150 ℃-300 ℃ this moment, bamboo charcoal carries out dry distillation charring under the state of partial vacuum, kept 4 days, this moment, kiln top smoke outlet was discharged clear cigarette, the complete charing of mao bamboon in the expression kiln;

Five, refining procedure: the manual labour wicket rises to 700-800 ℃ with kiln temperature, and the charcoal molecular aggregates in the bamboo charcoal is tightened, and increases oxygen supply from top to bottom, and the kiln temperature sharply rises to about 900 ℃, and visual inspection has the blue flame wriggling to rise, and keeps 30 minutes;

Six, spray steam operation: after treating that the charcoal molecule is assembled deflation fully, open kiln top gas orifice spray a small amount of water vapor, blue flame on the bamboo charcoal is progressively desalinated until cannot see, strengthen jet amount afterwards gradually, kiln words spoken by an actor from offstage mist is filled the air, under main header casing, bamboo charcoal is among the perfect vacuum, seals wicket and chimney this moment immediately;

Seven, envelope firer preface: will spray bamboo charcoal behind the steam and in kiln, close to seal and went out charcoal in about 4 days.

Claims

1, a kind of process for preparing activated carbon from bamboo is characterized in that comprising following production process:

(1) material choice operation: mao bamboon is sawn into thick bamboo tube, and the back of drying in the shade is stand-by;

(2) raw material loading of kiln operation: mao bamboon is loaded in the kiln according to certain rules, and clamming stays a burning osculum;

(3) smoke the cigarette dehydration procedure: kiln temperature is controlled at about 25 ℃-105 ℃, steams cigarette dehydration 6-10 days with flue gas;

(4) dry distillation charring operation: be warming up in the kiln about 150 ℃-300 ℃, bamboo charcoal is dry distillation charring under the state of partial vacuum, keeps 4 days;

(5) refining procedure: open wicket, be warmed up to 700 ℃-1000 ℃ in the kiln, increase oxygen supply, kept 1 hour;

(6) spray steam operation: open kiln top gas orifice,, seal wicket and chimney again toward the interior water spray of kiln steam;

(7) envelope firer preface: with the bamboo charcoal after jet at kiln inner sealing kiln discharge after 4 days.