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Manufacturing process of coarse grained thenardite

Anhydrous Glauber's Salt, a manufacturing process technology, applied in the direction of inorganic chemistry, alkali metal sulfite/sulfite, alkali metal compounds, etc., can solve the problems of shortened production process, excessive storage equipment, etc., to reduce dredging Waiting for work, shortening the process flow, and benefiting the effect of environmental protection

Inactive Publication Date: 2010-09-29
四川川眉特种芒硝有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to study a manufacturing process of coarse-grained anhydrous thenardite, so that it can overcome the shortcomings of the existing thenardite production technology, have a more ideal unit production capacity under the premise of ensuring high product purity, and overcome the thenardite production process. Shortcomings such as too much storage equipment in the middle, so that the production process is shortened

Method used

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  • Manufacturing process of coarse grained thenardite
  • Manufacturing process of coarse grained thenardite
  • Manufacturing process of coarse grained thenardite

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: Under the monitoring of the DCS automatic monitoring system and the control of the AK liquid balance flowmeter, the 24°Be concentration raw nitrate transported downhole is obtained by the first-stage pipeline filter to remove mechanical impurities, and the fourth-stage ion exchanger is refined and purified. The refined nitrate with very low impurity content is input into the continuous crystallization process system. In the continuous crystallization system, there are heat exchangers, crystallizers and thickeners. The refined nitrate is carried out in the heat exchanger with 1℃ cold water. Heat exchange to form a supersaturated solution containing 20% ​​sodium sulfate crystals-crystal slurry; the crystal slurry is input from the bottom of the crystallizer, and the crystals grow to an average particle size of 2mm in the crystallizer, thus forming a 35% crystal slurry. The supernatant of the saturated solution containing sodium sulfate in the upper part returns t...

Embodiment 2

[0040] Example 2: Under the monitoring of the DCS automatic monitoring system and the control of the AK liquid balance flowmeter, the 24Be concentration raw nitrate transported downhole is removed through the three-stage pipeline filter to remove mechanical impurities, and the eight-stage ion exchanger is refined and purified to obtain extremely low The refined nitrate with impurity content is input to the continuous crystallization process system. In the continuous crystallization system, there are heat exchangers, crystallizers, and thickeners. The refined nitrate is heat exchanged with 3℃ cold water in the heat exchanger. , To form a supersaturated solution containing 20% ​​sodium sulfate crystals-crystal slurry mixture; the crystal slurry is input from the bottom of the crystallizer, and the crystals grow in the crystallizer to an average particle size of 3mm, thereby forming a 40% crystal slurry. The upper part of the saturated solution containing sodium sulfate returns fro...

Embodiment 3

[0041] Example 3: Under the monitoring of the DCS automatic monitoring system and the control of the AK liquid balance flowmeter, the 24-30°Be concentration raw nitrate transported downhole is removed through a three-stage pipeline filter to remove mechanical impurities, and an eight-stage ion exchanger is refined and purified The refined nitrate with extremely low impurity content is processed and input into the continuous crystallization process system. In the continuous crystallization system, there are heat exchangers, crystallizers and thickeners. The refined nitrate is mixed with 3℃ in the heat exchanger. The cold water exchanges heat to form a supersaturated solution containing 15% sodium sulfate crystals-crystal slurry; the crystal slurry is input from the bottom of the crystallizer, and the crystals grow to an average particle size of 2.5mm in the crystallizer, thus forming 37% Crystal slurry, the upper part of the saturated solution containing sodium sulfate, the clear...

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Abstract

The invention discloses a manufacturing process of coarse grained thenardite, which is characterized in that under the monitoring of a DCS automatic monitoring system and the control of AK liquid balancing flow-rate meter, raw glass gall with a given concentration which is conveyed in the well is mechanically removed foreign matters by a primary pipeline filter and is precisely purified by a four-stage ion exchanger to obtain refined glass gall with low content of foreign matter, after pH value of the refined glass gall is adjusted, the refined glass gall is inputted to a continuous crystallization process system, after continuous solid-liquid separation in a primary centrifugal, the refined glass gall is re-inputted to a multilevel screw-type vacuum dryer to be dried and dehydrated and then to be conveyed to a fluidized bed to be treated, and after mirabilite with coarse grain is separated, the coarse grained thenardite is obtained.

Description

Technical Field: [0001] The invention belongs to the field of fine processing of inorganic chemicals, or the field of fine chemicals. Background technique: [0002] Anhydrous sodium sulfate is also called anhydrous nitrate, anhydrous Glauber's salt, sodium sulfate; white fine-grained crystal or powder, easily soluble in water, hygroscopic, odorless, and non-toxic. [0003] Sodium sulfate can form heptahydrate and decahydrate, heptahydrate (Na 2 SO 4 ·7H 2 O) is a white orthorhombic crystal. It becomes anhydrous when heated to 24.4℃. Sodium sulfate and carbon are reduced to sodium sulfide when reacting at high temperature [0004] Therefore, it is widely used in the manufacture of sodium sulfide, sodium silicate, etc., as well as in papermaking, glass, printing and dyeing, synthetic fibers, tanning, food, and chemical industries. In addition, it is also used as a blending agent for non-ferrous metal beneficiation, enamel, rubber, fertilizer, and light materials, as well as an addit...

Claims

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Application Information

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IPC IPC(8): C01D5/00
Inventor 苟兴无李春先李洪清张大明刘泽民李栋良刘文良
Owner 四川川眉特种芒硝有限公司
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