CN103539116A

CN103539116A - Process for producing activated carbon by means of phosphoric acid method

Info

Publication number: CN103539116A
Application number: CN201210236285.XA
Authority: CN
Inventors: 徐浩
Original assignee: Anhui Qiang Kun Machinery Co Ltd
Current assignee: Anhui Qiang Kun Machinery Co Ltd
Priority date: 2012-07-10
Filing date: 2012-07-10
Publication date: 2014-01-29

Abstract

The invention discloses a process for producing activated carbon by means of phosphoric acid method. The process is characterized by comprising the following technical steps of: firstly drying saw dust in the sun or by baking, wherein the dried saw dust are used as a main ingredient; feeding the dried saw dust into a mixing kettle, adding phosphoric acid into the mixing kettle, and mixing and stirring the saw dust and phosphoric acid for 3-5 minutes; feeding the mixed and stirred product into a carbonization and activation integrated furnace, and controlling the temperature at 600 DEG C for 1 hour (0.3 hour of carbonization and 0.7 hour of activation); introducing steam for 0.7 hour, removing impurities and recycling phosphoric acid; baking the activated carbon product with high water content using the excess heat inside the carbonization furnace, and packaging the product. The process disclosed by the invention is simple and clear in method, and is environmentally friendly and low in cost in the condition of keeping unchanged carbon yield rate.

Description

A kind of technique of producing active carbon by phosphoric acid method

Technical field

The present invention relates to carbon technique processed, be specifically related to a kind of technique of producing active carbon by phosphoric acid method.

Background technology

Development along with production, application of active, discovery is in applied activated carbon decontamination, the pollution that Activated Carbon Production itself is brought, with gac, economize on resources and the energy in, produce gac itself higher to energy consumption, our problem that will research and solve in process of production that Here it is.

Activated Carbon Production has pharmaceutical chemicals (zinc chloride, phosphoric acid etc.) activation method and the large class of gas activation method two, and China's pharmaceutical chemicals activation method adopts zinc chloride process mostly, from economizing in raw materials, this method yield of resource is high, the wood chip of 3t just can obtain 1t gac, comparison gas activation method 1t gac needs the wood chip of 15t, and zinc chloride process just has obvious one large advantage.The shortcoming of zinc chloride process maximum is serious environment pollution, has become the problem that very urgently need to solve, and this is had to two approach, the one, transform existing zinc chloride process production technique and equipment; The 2nd, find a kind of chemical Johnson's activation method that can replace zinc chloride process.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of method simple and clear, in the situation that char yield rate is constant, and environmental protection, the technique of a kind of producing active carbon by phosphoric acid method that cost is low.

Technical problem to be solved by this invention realizes by the following technical solutions.

A technique for producing active carbon by phosphoric acid method, is characterized in that: its processing step is as follows:

Step 1, the mode that wood chip is dried or dried are dried as major ingredient;

Step 2, by drying wood chip later, drop in stirring tank, and add phosphoric acid, mix and blend 3 ~ 5 minutes;

Step 3, step 2 mix and blend material is later dropped in charing, activation dual-purpose stove, temperature is 600 ℃, and the time is 1 hour (charing 0.3 hour, activates 0.7 hour);

Step 4, pass into steam, 0.7 hour time, remove impurity, reclaim phosphoric acid;

Step 5, utilize charing, the waste heat of activation in dual-purpose stove to being dried by the carbon dust of steam activation;

Step 6, by the charcoal screening packing of drying in step 5 later.

In above-mentioned steps 2, wood chip is 0.1 ~ 0.3:1.5 ~ 3 with the deal ratio of phosphoric acid.

The invention has the beneficial effects as follows: the inventive method is simple and clear, in the situation that char yield rate is constant, and environmental protection, cost is low, and phosphoric acid can reclaim and recycle simultaneously.

Embodiment

For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, further set forth the present invention.

A technique for producing active carbon by phosphoric acid method, its processing step is as follows:

1., get 150 parts of wood chips, the mode of drying or drying is dried as major ingredient;

2., by drying wood chip later, drop in stirring tank, and add 0 part of phosphatase 11, mix and blend 4 minutes;

3., 2. mix and blend material is later dropped in charing, activation dual-purpose stove, temperature is to be 1 hour (charing 0.3 hour, activates 0.7 hour) 600 ℃ of times;

4., pass into steam, 0.7 hour time, removal impurity, recovery phosphoric acid;

5., utilize charing, the waste heat of activation in dual-purpose stove to being dried by the carbon dust of steam activation;

6., in 5., dry charcoal screening packing later.

Above-mentioned 2. in, wood chip is 0.1 ~ 0.3:1.5 ~ 3 with the deal ratio of phosphoric acid.

More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims

1. a technique for producing active carbon by phosphoric acid method, is characterized in that: its processing step is as follows:

A, the mode that wood chip is dried or dried are dried as major ingredient;

B, by drying wood chip later, drop in stirring tank, and add phosphoric acid, mix and blend 3 ~ 5 minutes;

C, the material later of mix and blend in b is dropped in charing, activation dual-purpose stove, temperature is 600 ℃, and the time is 1 hour (charing 0.3 hour, activates 0.7 hour);

D, pass into steam, 0.7 hour time, remove impurity, reclaim phosphoric acid;

E, utilize waste heat in charring furnace to being dried by the carbon dust of steam activation;

F, by the charcoal screening packing of drying in e later.

2. a kind of technique of producing active carbon by phosphoric acid method according to claim 1, is characterized in that: in above-mentioned b, wood chip is 0.1 ~ 0.3:1.5 ~ 3 with the deal ratio of phosphoric acid.