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Title:
SYSTEM FOR PRODUCING SODIUM PYROSULFITE
Document Type and Number:
WIPO Patent Application WO/2021/114851
Kind Code:
A1
Abstract:
Provided is a system for producing sodium pyrosulfite. The system comprises a third reactor (1), a second reactor (3) and a first reactor (5), wherein a sodium carbonate storage bin (13) is separately connected to an alkali preparation tank (8) and an alkali liquor tank (10); the output end of the alkali preparation tank (8) is connected to the upper portion of the third reactor (1); the lower output end of the third reactor (1) is separately connected to a jet reactor positioned at the top of the third reactor (1) and the upper portion of the second reactor (3) by means of a third circulating pump (2); the lower output end of the second reactor (3) is separately connected to a jet reactor positioned at the top of the second reactor (3) and the upper portion of the first reactor (5) by means of a second circulating pump (4); the lower output end of the first reactor (5) is separately connected to a jet reactor (22) positioned at the top of the first reactor (5) and an elutriation tank (18) by means of a first circulating pump (6); and the elutriation tank (18) is sequentially connected to a centrifugal machine (19) and a drying machine (20). The sodium pyrosulfite prepared by the system has a good quality, a new process flow and low energy consumption, and has wide popularization and use values.

Inventors:
XU HAITAO (CN)
CHEN RENYUAN (CN)
XU YANZHONG (CN)
LIU DAHUA (CN)
LI MINGBO (CN)
SONG JING (CN)
XU MENG (CN)
Application Number:
PCT/CN2020/120587
Publication Date:
June 17, 2021
Filing Date:
October 13, 2020
Export Citation:
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Assignee:
JIANGSU DEYITONG ENVIRONMENTAL PROTECTION TECH CO LTD (CN)
International Classes:
C01D5/14
Foreign References:
CN211393883U2020-09-01
CN102659142A2012-09-12
CN202038998U2011-11-16
CN109607575A2019-04-12
CN105565343A2016-05-11
CN109970081A2019-07-05
CN104211092A2014-12-17
CN104208994A2014-12-17
CN110255585A2019-09-20
US4844880A1989-07-04
US3860695A1975-01-14
Attorney, Agent or Firm:
BEIJING LAWSING IP FIRM (CN)
Download PDF:
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