Sulfate pulping residue pulp recovery system and sulfate pulping production line
A technology of sulfate method and recovery system, applied in the field of papermaking and pulping, can solve the problems of sodium hydroxide and sodium sulfide loss, high treatment cost and environmental protection pressure, increase system production cost, etc., achieve reduction of treatment cost, treatment cost and Environmental protection, the effect of reducing washing water consumption
Inactive Publication Date: 2021-07-23
YUEYANG FOREST & PAPER CO LTD
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, due to the low concentration of the slurry, it is not suitable for direct use in papermaking products; and the waste liquid contains a certain amount of residual alkali such as sodium hydroxide and sodium sulfide. If it is directly sent to the wastewater treatment system, its workload will be increased, resulting in relatively large waste water. High processing cost and environmental protection pressure will also cause the loss of part of sodium hydroxide and sodium sulfide, which will virtually increase the production cost of the system
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
[0023] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.
[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred components or elements must ...
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 relates to a sulfate pulping residue slurry recovery system which comprises: a residue slurry tank used for storing residue slurry; a filtering device which is connected with the slag slurry tank and is used for separating the slag slurry conveyed by the slag slurry tank to obtain filter residues and filtrate; a filter residue treatment device which is connected with the filtering device and is used for recycling the filter residues; a pulp washing device which is connected with the filtering device, wherein the filtrate is conveyed to the pulp washing device through the filtering device to serve as washing water of the pulp washing device; and an alkali recovery device which is connected with the pulp washing device and is used for recovering black liquor generated by the pulp washing device. The slag slurry recovery system for sulfate pulping is simple in structure, low in treatment cost and environmentally friendly, and slag slurry can be effectively recovered and treated. In addition, the invention further provides a sulfate pulping production line which also has the technical effects.
Description
technical field [0001] The invention relates to the technical field of papermaking and pulping, in particular to a kraft pulping slurry recovery system and a kraft pulping production line. Background technique [0002] Kraft pulping is an alkaline pulping process that uses a mixture of sodium hydroxide and sodium sulfide to treat wood chips to produce pulp. The pulp produced by this method is washed and screened to obtain good pulp. After bleaching treatment (or unbleaching), it is sent to the paper machine for papermaking, while the pulp with low concentration after screening needs to be treated in different ways. [0003] Traditional pulp processing methods include making low-grade paper products, re-cooking, and regrinding. Among them, the processing methods for paper-making low-grade paper products can make better use of the pulp, recover fibers in the pulp, and reduce fiber loss. However, due to the low concentration of the slurry, it is not suitable for direct use in ...
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): D21C3/04D21C11/00D21C9/02
CPCD21C3/04D21C9/02D21C11/00
Inventor 胡峰史梦华董超朱宏伟余政周春军王岳军
Owner YUEYANG FOREST & PAPER CO LTD