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Method for preparing sodium sulfide by using combustible waste gases

A technology of sodium sulfide and waste gas, applied in the direction of alkali metal sulfide/polysulfide, etc., can solve the problems of high energy consumption, high labor intensity, high pollution, etc., and achieve high energy consumption, high labor intensity, and easy resources. the effect

Inactive Publication Date: 2011-08-10
攀枝花正惠源化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention provides a method for producing sodium sulfide by using combustible waste gas, making full use of the combustible waste gas produced by high-pollution enterprises, and effectively solving the problems of high pollution and high pollution during the melting of mirabilite or anhydrous sodium sulfate and the reaction process with white coal. There are problems in the above existing technologies such as energy consumption and high labor intensity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. The combustion chamber is removed from the traditional reverberatory furnace, and the other structural parts remain unchanged. The reaction chamber is sealed as the head chamber, and 2 to 8 mixed gas nozzles connected with gas pipes and air pipes are installed on the furnace wall of the reaction chamber; The inner diameter of the tube is 25-100 mm, and the inner diameter of the air tube is 50-200 mm. It is advisable to mix air and gas in the nozzle to achieve complete combustion. 2 to 5 nozzles are installed on the furnace wall of the chemical material bin. The installation angle of the nozzle in the bin is adjusted so that it is directly facing the position of the raw material on the combustion bed downwards. The installation angle of the nozzle is generally 15-17 degrees downward.

[0016] 2. The combustible exhaust gas used is all low-pressure gas, and the air pressure is generally 2000-12000Pa. The gas flow rate changes according to the different pipe diameters a...

Embodiment 2

[0022] 1. Remove the coal injection device of the existing short converter, and install the mixed gas nozzle and air distribution device connected with the gas pipe and the air pipe. The inner diameter of the gas pipe is 50-150mm, and the air pipe is 100mm-300mm. 1 to 3 gas nozzles are installed on the furnace wall. The air and gas are mixed in the nozzle, and after a certain pressure is formed, it is advisable to make the flame reach more than 3 meters, which is conducive to spraying the mixed gas to the position of the raw material.

[0023] 2. Mix 1,800 kg of Glauber's salt or 1,200 kg of anhydrous sodium sulfate with 400 kg of white coal, add from the feed port of the short converter and close the feed port. Start the converter and open the nozzle to let the injected flame form a uniform combustion in the lower part of the converter. Observe the air pressure gauge and control the mixing ratio of air pressure and air at the optimum value: if the gas pressure drops, the air ...

Embodiment 3

[0028] 1. The combustion method of the long converter is the same as that of the short converter. The difference lies in the installation of the nozzles. The number of nozzles is increased and installed according to the level. The diameter of the nozzle at the higher position is slightly larger, so that the flame can be sprayed farther. , the lower part has a smaller pipe diameter to provide sufficient heat for the front part of the furnace.

[0029] 2. Mix 9,000 kg of Glauber's salt or 6,000 kg of anhydrous sodium sulfate with 2,000 kg of white coal with 70% fixed carbon, and then add it to the long converter. According to the situation in the furnace, use the principle of more at the beginning and less at the end, close the feeding port, and start the converter. Turn on all nozzles. The process is the same as in Example 2, but it takes 2 hours to open the observation hole. The feeding and discharging and the reaction process take 4 to 5 hours. If 5 tons of sodium sulfide i...

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Abstract

The invention relates to a method for preparing sodium sulfide by using combustible waste gases. The method comprises the step of directly calcining mirabilite or anhydrous sodium sulfate serving as a raw material by using a coke oven gas, an exhaust gas of yellow phosphorus or a blast furnace gas to prepare the sodium sulfide. The method solves the problems of environmental pollution, high energy consumption and high manual labor intensity of conventional sodium sulfide industries which prepare the sodium sulfide from the mirabilite or the anhydrous sodium sulfate melted by using coal as a fuel, provides outlets for pollutant gases of coke oven enterprises, yellow phosphorus enterprises and steel enterprises, and has the advantages of low investment, little modification, easy maintenance, readily available resources, low labor intensity, high product quality, high yield, low pollution and suitability for various reverberatory furnaces and converters.

Description

technical field [0001] The invention belongs to the use of mirabilite or anhydrous sodium sulfate (Na 2 SO 4 ) and white coal with no less than 70% fixed carbon as raw materials to prepare sodium sulfide by calcining and reducing. Background technique [0002] Sodium sulfide, also known as soda sulfide and sulfide stone, is an important inorganic chemical raw material, mainly used in the manufacture of dyes, ore flotation agents, leather depilatory agents, paper cooking agents, and widely used in printing and dyeing and the manufacture of sulfides. [0003] At present, there are mainly three kinds of traditional sodium sulfide production processes. The first one is the production process of the reverberatory furnace. The furnace head has a combustion chamber. By continuously putting coal into the combustion chamber, the flame generated by the combustion chamber is blown to the back of the furnace. Where the flame passes reflects the material into the furnace causing it to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B17/24C01B17/26
Inventor 戴正川
Owner 攀枝花正惠源化工有限公司
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