Method and system for regenerating hydrochloric acid waste liquid

• Main Authors: Zhao Hai, Chang Qinxue, Wang Jun, Qin Jian, Wu Zongying, Gao Junfeng, Guo Jincang
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2016
• Subjects: BLASTING; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COMBUSTION APPARATUS; COMBUSTION PROCESSES; COMPOUNDS THEREOF; CONSUMING WASTE PRODUCTS BY COMBUSTION; CREMATION FURNACES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; INORGANIC CHEMISTRY; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; WEAPONS

The invention relates to a method for regenerating hydrochloric acid waste liquid. According to the method, a spray roasting method is adopted, and the hydrochloric acid waste liquid is preheated through circulating liquid in at least one washing mechanism in the second-stage washing mechanism and washing mechanisms behind the second-stage washing mechanism. The invention further relates to a system for regenerating the hydrochloric acid waste liquid. The system comprises a roasting furnace, a Venturi preconcentrator, an absorption tower and multiple stages of washing mechanisms, all of which are sequentially connected through a smoke pipeline, and a third heat exchange mechanism is arranged on a circulating liquid pipeline of at least one of the second-stage washing mechanism and the washing mechanisms behind the second-stage washing mechanism. Refrigerant inlets of all the third heat exchange mechanisms are connected with a hydrochloric acid waste liquid storage tank, and refrigerant outlets are all connect