Process for recycling papermaking alkali by replacing part of lime with carbide slag
A technology for calcium carbide slag and papermaking alkali, which is applied in the directions of alkali metal compounds, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of poor papermaking alkali recovery process, etc., and achieves improved permeability and screening progress. , Improve the effect of recycling progress
Pending Publication Date: 2021-05-25
新疆中泰兴苇生物科技有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] A kind of calcium carbide slag proposed by the present invention replaces part of the lime and is used in the papermaking alkali recovery process, which solves the problem of poor papermaking alkali recovery process
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0027] refer to Figure 1-3 A kind of calcium carbide slag is used for papermaking alkali recovery process instead of part of lime, comprising the following steps:
[0028] S1: Put the black liquor produced in the papermaking process into the inside of the evaporation equipment, and perform evaporation and concentration treatment on the black liquor inside the evaporation equipment;
[0029] S2: placing the concentrated black liquor obtained in step S1 in a combustion furnace for burning, burning out the organic matter in the black liquor, and discharging the remaining inorganic matter from the furnace in a molten state to obtain green liquor;
[0030] S3: Add the g...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a papermaking alkali recovery process using carbide slag to replace part of lime, relates to the technical field of papermaking alkali recovery, and provides aiming at solving the problem that the existing papermaking alkali recovery process is poor. The papermaking alkali recovery process comprises the following steps: putting black liquor generated in a papermaking process into evaporation equipment, carrying out evaporation and concentration treatment on black liquor in evaporation equipment, putting the obtained concentrated black liquor in a combustion furnace for combustion, burning out organic matters in the black liquor, discharging residual inorganic matters from the furnace in a molten state to obtain green liquor, adding the obtained green liquor and carbide slag into a carbide slag reactor together, and implementing heating treatment along with the steam coil pipe. According to the method, sodium hydroxide can be effectively recycled, part of lime can be replaced by the carbide slag, the amount of lime consumed for recycling sodium hydroxide is reduced, the recycling cost is reduced, the recycling efficiency is high, the cost is saved, and the effect is obvious.
Description
technical field [0001] The invention relates to the technical field of papermaking alkali recovery, in particular to a papermaking alkali recovery process in which carbide slag replaces part of lime. Background technique [0002] As one of the basic industries of the national economy, papermaking can reflect the development of social civilization and economic construction, and its products are mainly used as basic raw materials for other industries. [0003] In the process of paper production, a small amount of sodium hydroxide needs to be added, which brings problems of sodium hydroxide recovery and water treatment. In the process of sodium hydroxide recovery, a certain amount of lime needs to be used. In this process, The recovery cost of sodium hydroxide is greatly improved, so we propose a calcium carbide slag to replace part of the lime for the papermaking alkali recovery process. Contents of the invention [0004] The calcium carbide slag proposed by the invention i...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): C01D1/22
CPCC01D1/22C01P2006/80
Inventor 宋志民尤宏星甄靖宇苗林李传民李兴义苏晓刚叶润华龙江张衡苏兴山杨勇
Owner 新疆中泰兴苇生物科技有限公司