Unlock instant, AI-driven research and patent intelligence for your innovation.

System and method for producing calcined soda or producing calcined soda and baking soda

A baking soda and soda ash technology, which is applied in the system field of producing soda ash and baking soda, can solve the problems of aggravating the global warming effect and high storage and transportation costs, and achieve the effects of reducing storage and transportation costs, reducing environmental pollution, and improving product quality

Active Publication Date: 2011-07-27
内蒙古博源工程有限责任公司
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, in the process of preparing ethylene in the coal chemical industry, a large amount of high-purity carbon dioxide (its volume concentration is greater than 82%) is discharged in the purification process of the synthesis gas, which has a great impact on the atmosphere and aggravates the "greenhouse effect" of the earth; while in the chlor-alkali industry The caustic lye (its mass concentration is 30%) produced during the production of chlorine is stagnant in the market, because caustic lye has stronger corrosion and irritation, its storage and transportation cost is higher

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
  • System and method for producing calcined soda or producing calcined soda and baking soda
  • System and method for producing calcined soda or producing calcined soda and baking soda
  • System and method for producing calcined soda or producing calcined soda and baking soda

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: A kind of system of producing soda ash, it is made up of following device: lye buffer tank 1, centrifugal pump 14, pressurization blower 2, feed gas buffer tank 3, primary carbonization tower 4, soda ash centrifuge 6, soda ash Calcination device 8 and soda ash mother liquor storage tank 7, lye buffer tank 1, centrifugal pump 14 are sequentially connected with primary carbonization tower 4, pressurized fan 2 is connected with raw material gas buffer tank 3, raw material gas buffer tank 3 is connected with primary carbonization tower 4 is connected, the primary carbonization tower 4 is connected with the soda ash centrifuge 6, and the soda ash centrifuge 6 is respectively connected with the soda ash calcining device 8 and the soda ash mother liquor storage tank 7.

[0035] A method for preparing soda ash using a system for producing soda ash, which is realized by the following steps: (1) preparing a supersaturated soda ash solution; (2) separating and filteri...

Embodiment 2

[0039] Embodiment 2: a kind of method that utilizes the system of embodiment 1 to produce soda ash to prepare soda ash, and it is realized by following steps: (1) prepare supersaturated soda ash solution; (2) supersaturated soda ash solution is separated and filtered through soda ash centrifuge; (3 ) to prepare heavy soda ash product;

[0040] (1) Preparation of supersaturated soda ash solution: the temperature discharged from the chlor-alkali system is 35°C, and the caustic soda solution with a mass concentration of 30% is sent into the lye buffer tank 1, and then the lye is taken from the primary carbonization tower 4 with centrifugal pump 14 The top is sent to the first-stage carbonization tower 4, the carbon dioxide volume concentration is greater than 82%, the pressure is 0.14MPa, and the temperature is 30°C. The coal chemical synthesis gas purification exhaust gas is pressurized by the pressurization fan 2 to 0.52MPa and then passed into the raw material gas buffer tank 3...

Embodiment 3

[0043] Embodiment 3: a kind of method that utilizes the system of embodiment 1 to produce soda ash to prepare soda ash, and it is realized by following steps: (1) prepare supersaturated soda ash solution; (2) supersaturated soda ash solution is separated and filtered through soda ash centrifuge; (3 ) to prepare heavy soda ash product;

[0044] (1) Preparation of supersaturated soda ash solution: the temperature discharged from the chlor-alkali system is 32 ℃, and the caustic soda solution with a mass concentration of 30% is sent into the lye buffer tank 1, and then the lye is taken from the primary carbonization tower 4 with centrifugal pump 14 The top is sent to the first-stage carbonization tower 4, the carbon dioxide volume concentration is greater than 82%, the pressure is 0.13MPa, and the temperature is 25°C. The coal chemical synthesis gas purification waste gas is pressurized by the pressurization fan 2 to 0.52MPa and then passed into the raw material gas buffer tank 3 ...

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

No PUM Login to View More

Abstract

The invention discloses a system and a method for producing calcined soda and a system and a method for producing calcined soda and baking soda. The system for producing the calcined soda comprises the following devices: an alkali liquor buffer tank, a centrifugal pump, a booster fan, a feed gas buffer tank, a primary carbonization tower and a calcined soda centrifuge. The method for preparing the calcined soda by using the system for producing the calcined soda comprises the following steps of: (1) absorbing carbon dioxide by using caustic soda solution in the primary carbonization tower to prepare oversaturated calcined soda solution; and (2) separating and filtering a solid calcined soda wet material from the oversaturated calcined soda solution through the calcined soda centrifuge. The systems and the methods have the advantages that: (1) the carbon dioxide in purification exhaust of coal chemical industry synthesis gas is fully utilized, the quantity of the carbon dioxide emittedto the atmosphere is greatly reduced, and environmental pollution is reduced; (2) a large amount of unsalable caustic soda at the market is utilized, and the caustic soda storage and transport costs are reduced; and (3) the costs for producing the calcined soda and baking soda products are greatly reduced, and the grades of the calcined soda and baking soda products are improved.

Description

technical field [0001] The invention relates to a system and method for producing soda ash and baking soda, in particular to a system and method for producing soda ash and baking soda by using caustic soda in chlor-alkali production and carbon dioxide in recovered coal chemical synthesis gas purification waste gas. Background technique [0002] There are many ways to produce soda ash in industry, such as: trona method, ammonia soda method, combined soda method, etc., the reserves of trona in our country are small, and the calcium chloride by-product of the ammonia soda method will cause environmental pollution. The ammonium chloride fertilizer market has a limited capacity and cannot expand its scale. Industrially, baking soda is mainly produced by carbonization of soda ash. [0003] At present, there are many polyvinyl chloride projects in China. This project mainly produces ethylene from coal chemical industry and chlorine gas from chlor-alkali chemical industry, and then...

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
no application Login to View More
IPC IPC(8): C01D7/07
Inventor 丁喜梅李立峰王彦华任保祥苏占荣
Owner 内蒙古博源工程有限责任公司