Method and device for recycling hydrochloric acid and ferrous chloride with acid washing phosphorization waste liquor of steel wire rope
A technology of waste liquid recovery and wire rope acid, applied in the direction of ferric halide, chlorine/hydrogen chloride, chlorine/hydrogen chloride purification, etc., can solve problems such as pollution and impact on the environment
Active Publication Date: 2010-08-11
NANTONG SUNSHINE GRAPHITE EQUIP TECH
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Problems solved by technology
[0002] There is a lot of waste hydrochloric acid produced in the production of steel wire rope companies. Some companies use alkaline wastewater from polluting industries to neutralize it and then discharge it into the river, which brings other impurities into the river and affects environmental pollution.
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[0012] A method for recovering hydrochloric acid and ferrous chloride from steel wire rope pickling and phosphating waste liquid. The original waste acid is preheated by graphite, and the original waste acid channel of the cooler is input into an external multi-stage evaporator connected in series with a heater. Forced circulation device, except for the last external forced circulation device, the steam evaporated from the evaporators of other external forced circulation devices is sent to the graphite cooler, and the auxiliary agent in the auxiliary tank is sent to the graphite cooler, and further sent to the graphite cooler. Into the evaporator of the first section of external forced circulation device, the steam in the evaporator of the last section of external forced circulation device is input into the graphite preheating, the dilute acid waste water channel of the cooler, and then the waste water containing dilute hydrochloric acid is discharged, and passed through the alk...
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The invention discloses a method for recycling hydrochloric acid and iron dichloride from a phosphating waste liquor through acid cleaning of wire ropes. Original wasted acid is delivered into multiple sections of external forced circulation devices which are connected in series in sequence after passing through original wasted acid channels of a graphite preheater and a graphite cooler; steam evaporated by evaporators of other external forced circulation devices except the last section of external forced circulation device is delivered into a graphite cooler; an auxiliary agent in an auxiliary agent tank is delivered into the graphite cooler, and introduced into the evaporator of the first section of external forced circulation device; steam in an evaporator of the last section of external forced circulation device is delivered into diluted acid and waste water channels of the graphite preheater and the graphite cooler, and then waste water containing dilute hydrochloric acid is discharged after alkali neutralization; a solution in the evaporator of the last section of external forced circulation device is discharged into a solution storage tank, and further delivered into a mother solution crystallization tank for crystallization, so as to obtain an iron dichloride crystal; and concentrated hydrochloric acid is discharged from a solution outlet of the graphite cooler. In theinvention, HCl contained in the final waste water is less than or equals to 1 percent, so that the pollution can be effectively controlled.
Description
Technical field: [0001] The invention relates to a method and a device for recovering hydrochloric acid and ferrous chloride from steel wire rope pickling and phosphating waste liquid. Background technique: [0002] There is a lot of waste hydrochloric acid produced in the production of steel wire rope enterprises. Some enterprises use alkaline wastewater from polluting industries to neutralize it and then discharge it into the river, which brings other impurities into the river water and affects environmental pollution. Invention content: [0003] The object of the present invention is to provide a method and a device for recovering hydrochloric acid and ferrous chloride from the waste liquid of pickling and phosphating of steel wire ropes that can effectively control pollution. [0004] Technical solution of the present invention is: [0005] A method for recovering hydrochloric acid and ferrous chloride from steel wire rope pickling and phosphating waste liquid, charac...
Claims
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IPC IPC(8): C01B7/07C01G49/10
Inventor 冯圣君
Owner NANTONG SUNSHINE GRAPHITE EQUIP TECH