1 A flue gas desulfurization production.Industrial grade sodium metabisulfiteProcess and device

This article introduces a process and device for the production of industrial-grade sodium metabisulfite from flue gas desulfurization. The process uses industrial sodium sulfite with a content of more than 85% to absorb flue gas, control the pH value of the absorption liquid, and when the end pH value reaches 3.9-4.1, NaHSO3 is generated, and industrial-grade sodium metabisulfite is obtained by crystallization. The absorption liquid is Na2SO3 solution, and the crystallization mother liquid is mixed with the absorption liquid. The process described in this technology adopts a simple and feasible method to effectively reduce sulfate precipitation, improve the yield of industrial-grade sodium pyrosulfite, and effectively promote the industrialization of industrial-grade sodium pyrosulfite prepared by flue gas desulfurization.

2 Industrial grade sodium metabisulfite production unit

This paper introduces an industrial-grade sodium metabisulfite production device, including a reaction crystallizer, a circulating pump, a crystal discharge pump and corresponding pipelines. The top of the reaction crystallizer is equipped with a jet device, and the side of the reaction crystallizer barrel is provided with a circulating liquid outlet. The outlet of the circulating liquid is connected with the inlet of the circulating pump, the outlet of the circulating pump is connected with the inlet of the circulating liquid of the jet device, the circulating pump is connected with the reaction crystallizer through a pipeline to form a circulating loop, and a defoaming device is arranged at the top of the reaction crystallizer to discharge the reacted gas out of the reactor. The upper part of the bubbler is discharged, the lower part of the reaction crystallizer is equipped with a crystal outlet, the crystal outlet is equipped with a crystal outlet, the crystal outlet is connected with the crystal pump inlet., pH and density monitoring;Industrial grade sodium metabisulfiteThe reaction and crystallization are integrated, can be operated continuously, the generation efficiency is high, the reaction is thorough, the product particle size is uniform, and the purity is good.

3 A device and method for preparing industrial-grade sodium metabisulfite from high-concentration sulfur dioxide-rich gas.

This paper introduces a high concentration SO2 rich gas preparationIndustrial grade sodium metabisulfiteThe device and method of the invention include a water washing tower, the upper part of the water washing tower is provided with a blower, the blower blows the activated carbon regeneration rich gas into the first reactor, the second reactor and the third reactor in turn, the first reactor is connected to the cracking reactor on one side, the other side is connected to the centrifuge, the centrifuge is connected to the dryer on one side, and the dryer is connected to the dryer on the other side. It is connected with the alkali conditioning tank, the dryer is connected with the packaging machine, and the alkali conditioning tank is connected with the soda ash storage bin through the screw conveyor. The three reactors of this technology are all tower-type structure, with low resistance, thorough reaction, stability and reliability. They are especially suitable for large-scale production, with wide application range, low requirement for rich gas,% products can be produced with SO2 concentration higher than 1, equipment is closed for production, and there is no sulfur dioxide overflow in the workshop, good environment, no secondary pollution.

4 Industrial grade sodium metabisulfite solution high efficiency filtration device

This paper introduces a high-efficiency filtration device for industrial-grade sodium metabisulfite solution, which relates to the technical field of filtration devices. It includes a filter box. The side of the filter box is movable with a fixing plate. The front and rear sides of the fixing plate are respectively fixed with a fixing box and a fixing frame located in the filter box. The surface fixing frame of the fixing plate is fixedly installed with a filter screen. A first spring is fixedly installed in the fixing frame, a limit plate is fixedly installed at one end of the first spring, and a second spring is fixedly installed in the rotating shaft. By setting the first gear to rotate, the first gear drives the second gear to rotate, so that the second gear drives the connecting block to rotate through the junction box, so that the connecting block drives the scraper rotating shaft through rotation, so that the scraper can rotate. The impurities inside the filter can be stirred at all times during the rotation process, which reduces the blockage of the filter mesh by impurities and achieves the effect of high efficiency filtration.