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Semi-vertical reverberatory furnace for preparing sodium sulfide and process thereof

The technology of sodium sulfide and reverberatory furnace is applied to the semi-vertical reverberatory furnace and process field, which can solve the problems of high labor intensity, low thermal efficiency, difficult maintenance and other problems, and achieve the effects of reduced labor intensity, high thermal efficiency, and reduced workshop pollution.

Inactive Publication Date: 2009-10-28
孔凡逸
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The traditional reverberatory furnace tends to be eliminated due to its low conversion rate, low thermal efficiency and high labor intensity
Continuous converter, commonly known as long converter, the domestically improved long converter has a diameter of 2.7m and a length of 47m. This type of furnace has the advantages of better heat utilization and lower labor intensity, but there are many problems: ①The process conditions are not easy to control , there are often phenomena such as ring-shaped bonding of the furnace and excessively high temperature and thin soup. 1. The consumption of refractory bricks is large; and because of its large aspect ratio, it cannot be shut down for a long time to avoid deformation of the casing
If the long converter is too long and the diameter is too large, the feeding amount can be increased on the surface, and the output of each furnace is large. However, because the furnace is too thick and too long, the temperature difference between the front and back of the furnace will be too large, resulting in uneven raw and cooked, which seriously affects the crude alkali. Quality, due to the increase in the amount of feeding, the reaction time is prolonged, the number of furnaces is reduced, and the total output cannot be increased; the short converter has the advantages of easy control of process conditions, low consumption quota, advanced process indicators and other long converters. The most advanced data in the sodium sulfide production plant was created by the short converter, so the furnace has been used as a finalized production equipment
The main disadvantage of the short converter is that it cannot discharge and extract continuously; and because the furnace body is short and the temperature of the furnace exhaust gas is high (850-900°C), the thermal efficiency is low
[0003] There are no data and reports similar to the semi-vertical reverberatory furnace calcining reduction sodium sulfide method and device of the present invention in Chinese patents and domestic abstracts

Method used

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  • Semi-vertical reverberatory furnace for preparing sodium sulfide and process thereof

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preparation example Construction

[0034] When the semi-vertical reverberatory furnace for preparing sodium sulfide of the present invention is specifically used, the raw material ball is put into the feeding port 10 at the top of the vertical furnace 11, and coal powder is sprayed into the combustion chamber 18 to make it fully combustible, and the high-temperature gas passes through the negative pressure device. The front bed part 3 and the vertical furnace 11 melt the raw material mass, and the reactants in the molten state flow back into the front bed part 3 after passing through the high temperature resistant filler layer 7, and the secondary coal is added through the secondary coal feeding port 13 to form a molten material. The front bed part 3 uses high-pressure gas to vigorously stir the molten material until the reaction is completed, and the molten material is continuously released from the discharge port 2. In the gas scrubber 14, the molten material is passed through the dilute lye for secondary washi...

Embodiment 1

[0039] Raw material group: Yuanming powder: white coal: water with a weight ratio of 100:25:6, pressed into a raw material group by a pair of rollers, such as pressed into a pellet, and placed for 12 hours. The section of the vertical furnace 11 is 2.5 square meters, the effective height is 4.5 meters, the triangular refractory brick furnace bar is matched with the furnace bottom, and 4 layers of 80mm Pall ring layers are built on it. The effective inner diameter of the front bed portion 3 is 1.6×4.5×0.8 meters, and the model of the coal injection gun 19 is 300 kilograms of coal injection per hour. The effective height of the inner material layer of the vertical furnace 11 is maintained at 3.5-4 meters, and the amount of pulverized coal injected is controlled so that the temperature of the Pall ring layer is 850-950° C., for example, 900° C. When the effective volume of the front bed is maintained at about 75% by opening the discharge port 2, add secondary coal continuously, s...

Embodiment 2

[0041] Raw material mass: Yuanming powder:white coal:water:catalyst with a weight ratio of 100:30:6:0.5, pressed into a raw material mass by rolling machine, and left for 12 hours. This embodiment adopts the same fixed furnace type as that of Embodiment 1. Maintain the effective height of the inner material layer of the vertical furnace 11 to be 3-3.5 meters, and the amount of pulverized coal injected is controlled so that the temperature of the Pall ring layer is in the range of 850---950 ° C, such as 880 ° C. When the effective volume of the front bed part 3 reaches about 75%, add secondary coal continuously. Based on the calorific value of the filter residue 85%, 6000 kcal of white coal is used, and the total coal consumption per ton of 60% soda sulfide reduction process is <0.75 tons.

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Abstract

The invention discloses a semi-vertical reverberatory furnace for preparing sodium sulfide and a technique thereof. The semi-vertical reverberatory furnace comprises a combustion chamber, a forehearth part, a vertical furnace and an aeration tower. The technique comprises the following steps: anhydrous sodium sulphate or glauber salt and pulverized anthracite are briquetted and then put into the semi-vertical reverberatory furnace; by utilizing reaction waste heat, the pallets flow through a packing layer and then enter the forehearth part in a melting state; fused mass of the forehearth part is heated by the combustion chamber, and the reaction is finished; and the steps of leaching, filtering, evaporating and concentrating are carried out after the reaction is finished so as to obtain the product, namely industrial sodium sulfide. Compared with the reverberatory furnace and the converter in the traditional process, as tail gas is adopted to heat and melt solid materials, the coal consumption for annealing and reducing is reduced by more than 25 percent; and compared with the common short convertor, the invention has the advantages of low coal consumption, less investment, easy maintenance, pollution reduction, high mechanization degree and continuous production.

Description

technical field [0001] The invention relates to a new process and equipment for producing sodium sulfide, more specifically, it belongs to the chemical industry, which uses sodium sulfide or Glauber's salt (H2SO4) and pulverized coal (C) as raw materials to calcinate and reduce sodium sulfide. reverberatory furnace and process. Background technique [0002] Calcination reduction is the main process of alkali sulfide production. At present, domestic calcination equipment mainly includes reverberatory furnace, short converter and long converter. The traditional reverberatory furnace tends to be eliminated due to its low conversion rate, low thermal efficiency and high labor intensity. Continuous converter, commonly known as long converter, the domestically improved long converter has a diameter of 2.7m and a length of 47m. This type of furnace has the advantages of better heat utilization and lower labor intensity, but there are many problems: ①The process conditions are not ...

Claims

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Application Information

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IPC IPC(8): C01B17/26
CPCY02P20/129
Inventor 孔凡逸
Owner 孔凡逸
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