Method and device for preparing hydrochloric acid and purifying quartz sand

A technology of quartz sand and hydrochloric acid, applied in the fields of environmental protection and energy saving, can solve problems such as increasing the cost of production enterprises, and achieve the effect of low cost and high purity

Active Publication Date: 2016-12-14
田晋丞
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although high-temperature chlorination does not produce waste acid and waste water, it requires a large amount of electric heating to heat chlorine gas or hydrogen chloride gas and quartz sand from normal temperature to a temperature of about 950-1200 degrees, which greatly increases the cost of other processes. production company cost

Method used

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  • Method and device for preparing hydrochloric acid and purifying quartz sand

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preparation example Construction

[0025] The structure of the device for preparing hydrochloric acid and purifying quartz sand provided by the present invention is as follows: figure 1 As shown, it includes hydrogen chloride gas synthesis and cooling system, quartz sand drying system, quartz sand high temperature chlorination purification system, hydrochloric acid preparation and purification system.

[0026] The hydrogen chloride gas synthesis and cooling system at least includes a synthesis furnace 1, the lower part of the furnace wall of the synthesis furnace 1 is provided with a water cooling device, and the upper part of the furnace wall is provided with a gas cooling device. The cooling air pipe 2, the inlet end of the cooling air pipe 2 is connected with the blower 3, and the outlet end of the cooling air pipe 2 leads to the quartz sand drying system. The bottom end of the synthesis furnace is provided with a chlorine and hydrogen inlet 4, an ignition device 5 is arranged in the synthesis furnace, and a...

Embodiment 1

[0031] Example 1, taking the quartz sand produced by a certain quartz sand company in Huanggang City with a particle size of 30 to 120 mesh and a water content of 5% as an example, the SiO 2 %: 99.6%, Fe 2 o 3 :0.015%.

[0032] 1. First put the quartz sand to be dried in the quartz sand silo to be dried, first turn on the induced draft fan of the drying system; then turn on the induced draft fan of the hydrogen chloride tail gas treatment system to make the hydrogen chloride falling film absorption system operate normally, then turn on the chlorination system The fan of the dust collector and the cooling water valve of the cooler in front of the dust collector are used to make them operate normally; then respectively open the valves of chlorine gas and hydrogen gas and the automatic ignition device to make them run normally, and adjust the flow of cooling water and cooling air To adjust the gas temperature of the hydrogen chloride at the outlet of the synthesis furnace betwe...

Embodiment 2

[0035] Embodiment 2, taking the quartz sand produced by a certain quartz sand company in Heyuan City as an example with a particle size of 30 to 120 mesh and a water content of 5%, SiO in the quartz sand 2 %: 99.3%, Fe 2 o 3 :0.015%

[0036] 1. First put the quartz sand to be dried in the quartz sand silo to be dried, first turn on the induced draft fan of the drying system; then turn on the induced draft fan of the hydrogen chloride tail gas treatment system to make the hydrogen chloride falling film absorption system operate normally, then turn on the chlorination system The fan of the dust collector and the cooling water valve of the cooler in front of the dust collector are used to make them operate normally; then respectively open the valves of chlorine gas and hydrogen gas and the automatic ignition device to make them run normally, and adjust the flow of cooling water and cooling air To adjust the gas temperature of the hydrogen chloride at the outlet of the synthesis...

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Abstract

The invention provides a method and a device for preparing hydrochloric acid and purifying quartz sand. The method comprises the following steps: igniting hydrogen and chlorine in a synthetic furnace, carrying out a reaction to produce hydrogen chloride gas, releasing heat, and controlling the temperature of hydrogen chloride gas at the outlet of the synthetic furnace to be 500-1300 DEG C; heating cooling air in a gas cooling device, introducing the air into the bottom of a drying device filled with semi-finished quartz sand, allowing hot air to flow from the bottom upwards, drying the semi-finished quartz sand, and taking the moisture therein; allowing the dried semi-finished quartz sand into a chlorination impurity removal device by the drying device, and completing purification of the quartz sand; allowing the hydrogen chloride gas and metal chloride gas in the chlorination impurity removal device to flow out of the top, and allowing the gas to enter the gas cooling device. According to the method disclosed by the invention, the whole quartz sand purification process can be energy-saving and low in cost on the premise of guaranteeing the quality of synthetic hydrochloric acid, and the purified quartz sand is high in purity.

Description

technical field [0001] The invention provides a method and a device for purifying quartz sand by using high-temperature hydrogen chloride gas generated in the process of synthesizing hydrochloric acid, belonging to the technical fields of energy saving and environmental protection. Background technique [0002] As we all know, in the production process of synthetic hydrochloric acid, the combustion and combination reaction of hydrogen and chlorine is a violent exothermic reaction, which releases a huge amount of heat △H=-184.6KJ / mol during the reaction process, and the temperature of the combustion center reaches above 2500 degrees , The temperature of the hydrogen chloride gas generated is above 2000 degrees. These heats are dissipated in the surrounding environment by the furnace body of the synthesis furnace, fins and cooling serpentine tubes, which not only causes energy waste, but also affects the surrounding dry environment. Therefore, how to effectively utilize the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/01C01B7/07C01B33/12
CPCC01B7/012C01B7/0706C01B33/12C01P2006/80Y02P20/10
Inventor 田晋丞
Owner 田晋丞
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