Unlock instant, AI-driven research and patent intelligence for your innovation.
Device and method for preheating by utilizing steam condensate water for aluminum oxide high-pressure digestion process
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of steam condensate and high-pressure dissolution, which is applied in the direction of alumina/hydroxide, etc., can solve the problems of irreducible and large consumption of high-pressure steam, and achieve the effect of saving operating costs
Active Publication Date: 2014-03-05
NORTHEASTERN UNIV ENG & RES INST CO LTD
View PDF2 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Due to the large temperature difference between the secondary steam preheating temperature and the dissolution temperature, the amount of high-pressure steam has always been large and cannot be reduced
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0019] The structure of the device for preheating by steam condensed water in the alumina high-pressure dissolution process is as follows: figure 1 As shown, the outlet of the feed tank 1 is connected to the feed pump 2, the outlet of the feed pump 2 is connected to the feed port of the first-stage casing preheater 3, and the outlet of the first-stage casing preheater 3 is connected to the The feed port of the 2-stage casing preheater 4 is connected, the discharge port of the 2-stage casing preheater 4 is connected with the feed port of the 3-stage casing preheater 5, and the feed port of the 3-stage casing preheater 5 is connected. The discharge port is connected with the feed port of the 4-stage casing preheater 6, the discharge port of the 4-stage casing preheater 6 is connected with the feed port of the 5-stage casing preheater 7, and the 5-stage casing preheater The discharge port of the heater 7 communicates with the feed port of the 6-stage casing preheater 8, and the d...
Embodiment 2
[0028] The structure of the device for preheating by steam condensed water in the alumina high-pressure stripping process is the same as in Example 1;
[0029] The steps of the high-pressure alumina dissolution process using steam condensed water to preheat are the same as in Example 1, the difference is that the 90°C desiliconized slurry in the feed tank is transferred to the 1-9 casing preheater through the feed pump , the pulp is preheated to 205°C, and then enters the steam condensate jacket preheater, the pulp is preheated to 216°C, and then enters the high-pressure steam jacket preheater, and is preheated to 270°C, and finally into the hold tank and flash evaporator;
[0030] Saturated steam at 290°C is introduced into the inlet of the high-pressure steam jacket preheater, and the temperature of the condensed water formed at the condensed water outlet is 235°C.
Embodiment 3
[0032] The structure of the device for preheating by steam condensed water in the alumina high-pressure stripping process is the same as in Example 1;
[0033] The method steps of using steam condensed water preheating in alumina high-pressure dissolution process are the same as in Example 1, the difference is that the 100°C desiliconized slurry in the feed tank is transferred to the 1st to 9th grade casing preheater through the feed pump , the pulp is preheated to 210°C, and then enters the steam condensate jacket preheater, the pulp is preheated to 220°C, and then enters the high-pressure steam jacket preheater, and is preheated to 280°C, and finally into the hold tank and flash evaporator;
[0034] Saturated steam at 300°C is introduced into the medium inlet of the high-pressure steam casing preheater, and the temperature of the condensed water formed at the condensed water outlet is 240°C.
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 device and method for preheating by utilizing steam condensate water for an aluminum oxide high-pressure digestion process and belongs to the technical field of aluminum oxide production equipment. The device is provided with a steam condensate water casing pipe preheater; the discharge hole of the last stage of the multiple stages of casing pipe preheaters is communicated with the feeding hole of the steam condensate water casing pipe preheater; and the discharge hole of the steam condensate water casing pipe preheater is communicated with the feeding hole of a high-pressure steam casing pipe preheater. The method comprises the following steps of: preheating desiliconized ore pulp to 200-210 DEG C in the multiple stages of casing pipe preheaters; entering the steam condensate water casing pipe preheater and preheating to 212-220 DEG C; and then entering the high-pressure steam casing pipe preheater. According to the device and method for preheating by utilizing the steam condensate water for the aluminum oxide high-pressure digestion process, a high-pressure steam condensate water section heat exchange process is introduced, and thus, not only is the latent heat of steam fully utilized but also the sensible heat of high-temperature condensate water is partially utilized, and thereby, the high-pressure steam consumption of a digestion system can be obviously reduced, and the running cost is greatly saved.
Description
technical field [0001] The invention belongs to the technical field of alumina production equipment, in particular to a device and method for preheating by steam condensed water in an alumina high-pressure dissolution process. Background technique [0002] In the Bayer process alumina plant, the dissolution workshop is the core workshop in the alumina production process. It not only affects the alumina output of the entire plant, but also is a major energy consumer in the alumina plant. The level of dissolution technology represents the technical level of the entire plant. [0003] With the development of the alumina industry, more and more attention has been paid to improving technical and economic indicators and reducing consumption; the main dissolution casing preheating technology adopted by my country's alumina plants is secondary steam plus high-pressure steam preheating; 1~9 casing The preheater is preheated with secondary steam, and the 10th stage casing preheater is ...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More