CN1222414A - Method of comprehensive utilization of paper-making black liquor, fume and flyash to form environment-protecting good circulation - Google Patents

Method of comprehensive utilization of paper-making black liquor, fume and flyash to form environment-protecting good circulation Download PDF

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Publication number
CN1222414A
CN1222414A CN 98104567 CN98104567A CN1222414A CN 1222414 A CN1222414 A CN 1222414A CN 98104567 CN98104567 CN 98104567 CN 98104567 A CN98104567 A CN 98104567A CN 1222414 A CN1222414 A CN 1222414A
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CN
China
Prior art keywords
flyash
flue gas
black liquor
brick
fume
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 98104567
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Chinese (zh)
Inventor
钟卿
韩秀英
Original Assignee
钟卿
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 钟卿 filed Critical 钟卿
Priority to CN 98104567 priority Critical patent/CN1222414A/en
Publication of CN1222414A publication Critical patent/CN1222414A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to the comprehensive treatment and utilization of the three wastes including waste water, waste gas and residue at low cost. It features that while treating paper-making black liquor, fume is also treated to reduce the pollution to air. The reaction product sodium carbonate is reacted with lime in bake-free brick to raise its strength. The bake-free brick of flyash is light and good in heat insulation and it is ideal material for high- rise buildings.

Description

The benign cycle of environmental protection----black liquid, flue gas, total utilization of PCA new method
The invention belongs to the multipurpose use of the three wastes field.
Known to me, the black liquid measure of comprehensive has two kinds of Silvola recovery and physics biochemical process.6,000,000 yuan of the minimum need of the investment of these two kinds of methods, the highest tens million of units, and also operating cost is also higher.Obviously, in today of market economy, this is a very big pressure to paper industry.
Flue gas generally only adopts dust suppression, and harmful substance is not wherein done any processing.
The utilization of coal ash method is a lot, except that large batch of build the road utilize, be used for the building block of building industry or brick all because of the cost height or quality is low can not can not get large-scale popularization with the clay brick competition, pile up like a mountain to cause flyash, is on the rise and bake bricks simultaneously with ruining.
The objective of the invention is to the treatment of wastes with processes of wastes against one another, reduce to greatest extent and administer the investment of polluting, improve the quality of products, make environmental protection that a benign cycle be arranged.
Brief introduction of the present invention:
At first black liquid is collected, feed flue gas then, the alkalescence that acidic materials in the dependence flue gas and heat make black liquid is neutralized and is concentrated, and then is equipped with flyash production fired brick or non-burning brick with these concentrates.
The present invention compared with prior art has following advantage:
One, environmental benefit is good.
1, black liquid is thoroughly administered.
2, the harmful substance major part in the flue gas obtains administering.
3, flyash can obtain large utilization.
4, under the prerequisite of flyash brick quality and price guarantee, the production of clay brick is expected effectively to be suppressed, thereby limited land resources are protected.
Two, good in economic efficiency.
1, economic investment is little.
The black liquor treatment in a, a ton paper mill (not comprising acceptance of the bid water and other waste water) project investment approximately needs 10-20 to get final product for ten thousand yuan.
B, flue gas are administered with black liquor treatment and are carried out synchronously, need not reinvest.
C, flyash brick production can be adopted existing production line, only increase some mixing plants and get final product.Non-burning brick boiler and the steam-cured still of saving can reduce cost greatly.
Flow process:
Details are as follows for flow process:
Built-in two black liquor reaction tanks in the paper mill (in order to being used alternatingly) react introducing in the pond through the flue gas of dedusting.The flue gas of sending here because of air blast has a determined power, need not stir black liquor, circulates in the pond voluntarily; The heat that black liquor absorbs flue gas constantly concentrates; Owing to contain CO in the flue gas 2, SO 2, NO xDeng acidic materials, can neutralize with the alkaline matter in the black liquor, thereby make the pH value of black liquor drop to 7-9: the black liquor stink through flue gas treatment diminishes: treat to send into the flyash brick field after black liquor is concentrated to a certain degree.
Coal ash baking-free brick prescription and technology:
The coal ash baking-free brick Main Ingredients and Appearance is flyash and quick lime.The about 80-90% of flyash content wherein, the about 5-20% of quick lime, gypsum about 3%.After raw material prepares, add the black liquid that concentrates, the back pressure forming that stirs feeds the flue gas maintenance at last and can produce after 48 hours, and quality reaches standard.

Claims (3)

1. one kind is utilized black liquid to handle flue gas, produces the method for flyash brick, it is characterized in that: react introducing in the black liquid pond through the flue gas of dedusting, the heat that black liquor absorbs flue gas constantly concentrates; Owing to contain CO in the flue gas 2, SO 2, NO xDeng acidic materials, can neutralize with the alkaline matter in the black liquor, thereby make the pH value of black liquor drop to 7-9.
2. one kind is utilized black liquid to handle the method that flue gas is produced flyash brick, and the main component of its coal ash baking-free brick is flyash and quick lime, the about 80-90% of flyash content wherein, the about 5-20% of quick lime, gypsum about 3%.
3. its maintenance process of method that utilizes black liquid to handle flue gas production flyash brick is: feed flue gas maintenance 48 hours.
CN 98104567 1998-03-18 1998-03-18 Method of comprehensive utilization of paper-making black liquor, fume and flyash to form environment-protecting good circulation Pending CN1222414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 98104567 CN1222414A (en) 1998-03-18 1998-03-18 Method of comprehensive utilization of paper-making black liquor, fume and flyash to form environment-protecting good circulation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 98104567 CN1222414A (en) 1998-03-18 1998-03-18 Method of comprehensive utilization of paper-making black liquor, fume and flyash to form environment-protecting good circulation

Publications (1)

Publication Number Publication Date
CN1222414A true CN1222414A (en) 1999-07-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 98104567 Pending CN1222414A (en) 1998-03-18 1998-03-18 Method of comprehensive utilization of paper-making black liquor, fume and flyash to form environment-protecting good circulation

Country Status (1)

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CN (1) CN1222414A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004055264A1 (en) * 2002-12-17 2004-07-01 Shujun Liu System and method for utilizing the heat of smelting fume in papermaking and eliminating the pollution of black lye and the exhaust gas and residue of smelting
CN101990523A (en) * 2008-09-30 2011-03-23 卡勒拉公司 Co2-sequestering formed building materials
CN102008881A (en) * 2010-11-01 2011-04-13 徐艺峰 Method for removing carbon dioxide from industrial waste gas
CN101956441B (en) * 2009-07-20 2011-11-16 广东绿由环保科技股份有限公司 Lightweight environment-friendly bricks prepared from waste incineration flyash and preparation method thereof
CN103172334A (en) * 2013-03-21 2013-06-26 曹凯 Loess baking-free brick and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004055264A1 (en) * 2002-12-17 2004-07-01 Shujun Liu System and method for utilizing the heat of smelting fume in papermaking and eliminating the pollution of black lye and the exhaust gas and residue of smelting
CN101990523A (en) * 2008-09-30 2011-03-23 卡勒拉公司 Co2-sequestering formed building materials
CN101990523B (en) * 2008-09-30 2015-04-29 卡勒拉公司 Co2-sequestering formed building materials
CN101956441B (en) * 2009-07-20 2011-11-16 广东绿由环保科技股份有限公司 Lightweight environment-friendly bricks prepared from waste incineration flyash and preparation method thereof
CN102008881A (en) * 2010-11-01 2011-04-13 徐艺峰 Method for removing carbon dioxide from industrial waste gas
CN103172334A (en) * 2013-03-21 2013-06-26 曹凯 Loess baking-free brick and preparation method thereof

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