CN-121974517-A - Lithium carbonate wastewater thallium and fluorine removal purification device based on chemical precipitation and adsorption

CN121974517ACN 121974517 ACN121974517 ACN 121974517ACN-121974517-A

Abstract

The invention relates to the field of wastewater treatment, in particular to a thallium and fluorine removal purification device for lithium carbonate wastewater based on chemical precipitation and adsorption. The invention relates to a thallium removal and defluorination purification device for lithium carbonate wastewater based on chemical precipitation and adsorption, which is sequentially provided with a pH adjusting mechanism, an oxidation mechanism, a first-stage precipitation mechanism, a second-stage precipitation mechanism, a filtering mechanism, an ion exchange mechanism, an activated carbon adsorption mechanism and a discharge mechanism, wherein the first-stage precipitation mechanism and the second-stage precipitation mechanism both use the same wastewater precipitation processor, reaction precipitation in wastewater, flocculating agent and micro sand form heavy sand flocs together, precipitates in the form of heavy sand flocs are respectively gathered in each precipitation pipe to form precipitated sludge, and finally the precipitated sludge in all precipitation pipes is uniformly pushed out of a wastewater cabin to finish rapid cleaning work. Solves the technical problems that thallium and fluorine precipitate substances formed in the lithium carbonate wastewater treatment are difficult to form a compact solid-liquid separation layer in a sedimentation tank, so that the cleaning difficulty is high.

Inventors

QIAN YONG
Zhong Dingjian
LI LIN
ZHONG HANG
ZHANG YANSHENG
LIANG SHUHUI

Assignees

赣州祺祥新能源有限公司

Dates

Publication Date: 20260505
Application Date: 20260205

Claims (10)

1. The lithium carbonate wastewater thallium and fluorine removal purification device based on chemical precipitation and adsorption is sequentially provided with a pH adjusting mechanism, an oxidation mechanism, a primary precipitation mechanism, a secondary precipitation mechanism, a filtering mechanism, an ion exchange mechanism, an activated carbon adsorption mechanism and a discharge mechanism, wherein the primary precipitation mechanism and the secondary precipitation mechanism both use the same wastewater precipitation processor; The wastewater sedimentation treatment machine is characterized by comprising a mounting frame (1), wherein a wastewater cabin (2) is fixedly connected to the mounting frame (1), an overflow pipe (21) is connected to the wastewater cabin (2), a bushing (22) is fixedly connected to the bottom of the wastewater cabin (2), a liquid inlet pipe (23) is connected to the bushing (22), a three-way pipe (24) for connecting the liquid inlet pipe (23) is fixedly connected to the wastewater cabin (2), an electric control lifter (31) is mounted on the mounting frame (1), a main track plate (32) is fixedly connected to the electric control lifter (31), an underwater electric control translation machine (33) is mounted on the main track plate (32), an inner container (4) is fixedly connected to the underwater electric control translation machine (33), an inner cavity (401) is formed in the inner container (4), a liquid inlet channel (402) structure for connecting the inner cavity (401) is formed in the middle of the inner container (4), the liquid inlet pipe (23) is communicated with a liquid inlet channel (402), a plurality of sedimentation pipes (41) communicated with an inner cavity (401) are fixedly connected to the inner lower side of the inner container (4), an interception filter screen (34) closely attached to the lower end of the sedimentation pipes (41) is fixedly connected to the main track plate (32), pushing columns (42) corresponding to the sedimentation pipes (41) in number and position are connected to the inner container (4) in a sliding mode, fixing plates (43) are fixedly connected between all the pushing columns (42), lifting screw rods (44) are connected to the inner container (4) in a rotating mode, the lifting screw rods (44) are connected with the fixing plates (43) in a rotating mode, and an underwater motor (45) driving the lifting screw rods (44) to rotate is arranged on the inner container (4).
2. The purification device for removing thallium and fluorine from lithium carbonate wastewater based on chemical precipitation and adsorption according to claim 1, wherein the chemical precipitation reaction reagent used by the primary sedimentation mechanism is a vulcanizing agent, the chemical precipitation reaction reagent used by the secondary sedimentation mechanism is lime milk, and the adsorption resin used by the ion exchange mechanism is CH-TI resin.
3. The lithium carbonate wastewater thallium and fluorine removal purification device based on chemical precipitation and adsorption is characterized in that a liquid inlet pipe (23) is rotationally connected with a bushing (22), the liquid inlet pipe (23) is rotationally connected with a three-way pipe (24), a driven gear (25) is fixedly connected to the liquid inlet pipe (23), a driving motor (26) is arranged on the three-way pipe (24), a driving gear (27) is fixedly connected to an output shaft of the driving motor (26), the driving gear (27) is meshed with the driven gear (25), and a paddle blade (28) is fixedly connected to the liquid inlet pipe (23).
4. A purification device for thallium and fluorine removal from lithium carbonate wastewater based on chemical precipitation and adsorption according to claim 3, wherein the top of the inner container (4) is provided with a reflux passage (403) which is communicated with the inner cavity (401).
5. The purification device for removing thallium and fluorine from lithium carbonate wastewater based on chemical precipitation and adsorption according to claim 1, wherein the top of the inner container (4) is connected with a sand injection pipe (5).
6. The chemical precipitation and adsorption-based lithium carbonate wastewater thallium and fluorine removal purification device according to claim 1, wherein a spiral guide strip (2301) structure is arranged in the liquid inlet pipe (23).
7. A purification device for thallium and fluorine removal from lithium carbonate wastewater based on chemical precipitation and adsorption according to claim 5, wherein the sand injection pipe (5) is connected with a fine nozzle (51).
8. A purification device for thallium and fluorine removal from lithium carbonate wastewater based on chemical precipitation and adsorption according to any one of claims 1 to 7, characterized in that a secondary orbit plate (35) is fixedly connected to the wastewater tank (2).
9. The purification device for removing thallium and fluorine from lithium carbonate wastewater based on chemical precipitation and adsorption according to claim 8, wherein the secondary track plate (35) is provided with a discharge through hole (3501).
10. The thallium and fluorine removal purification device for lithium carbonate wastewater based on chemical precipitation and adsorption according to claim 9, wherein a waste hopper (36) communicated with a discharge through hole (3501) is fixedly connected to the bottom of the auxiliary track plate (35), and a waste collection box (37) aligned to the lower part of the waste hopper (36) is fixedly connected to the mounting frame (1).

Description

Lithium carbonate wastewater thallium and fluorine removal purification device based on chemical precipitation and adsorption Technical Field The invention relates to the field of wastewater treatment, in particular to a thallium and fluorine removal purification device for lithium carbonate wastewater based on chemical precipitation and adsorption. Background Lithium carbonate is a key raw material of a lithium battery anode material, a large amount of wastewater containing thallium element and fluorine element can be generated in the production process, thallium is a highly toxic heavy metal, irreversible damage can be caused to a human nervous system even in a trace level, the lithium carbonate is extremely difficult to degrade in the environment, the overscale discharge can lead to water body biological enrichment and harm ecological safety, fluorine ions have strong corrosiveness and biological nondegradability, the excessive discharge can damage the acid-base balance of the water body, health risks such as fluoride plaque teeth are formed, and the purity of a lithium carbonate product can be reduced due to high concentration of fluoride, and the cycle life and the safety performance of the battery are directly influenced. In the actual treatment process, thallium and fluorine are often removed by adopting multistage processes such as oxidation-sedimentation-flocculation-ion exchange and the like, thallium and fluorine are converted into sediment substances, however, the sediment particle sizes are generally thinner, the viscosity is high, a compact solid-liquid separation layer is difficult to form in a sedimentation tank, and the residual tiny sediment is difficult to thoroughly recover through conventional filter pressing or centrifugation, so that the sediment cleaning difficulty is higher. Disclosure of Invention In order to overcome the defect that a compact solid-liquid separation layer is difficult to form in a sedimentation tank due to thallium and fluorine precipitate substances formed in lithium carbonate wastewater treatment and the cleaning difficulty is high, the invention provides a thallium and fluorine removal purification device for lithium carbonate wastewater based on chemical precipitation and adsorption. The invention relates to a thallium and fluorine removal purification device for lithium carbonate wastewater based on chemical precipitation and adsorption, which is sequentially provided with a pH adjusting mechanism, an oxidation mechanism, a primary precipitation mechanism, a secondary precipitation mechanism, a filtering mechanism, an ion exchange mechanism, an activated carbon adsorption mechanism and a discharge mechanism, wherein the primary precipitation mechanism and the secondary precipitation mechanism are all of the same type of wastewater precipitation treatment machine, the wastewater precipitation treatment machine comprises a mounting frame, a wastewater cabin, an overflow pipe, a lining, a liquid inlet pipe, a tee pipe, an electric control lifter, a main rail plate, an underwater electric control translation machine, an interception filter screen, an inner container, a precipitation pipe, a push post, a fixed plate, a lifting screw and an underwater motor, wherein a wastewater cabin is fixedly connected to the mounting frame, an overflow pipe is fixedly connected to the bottom of the wastewater cabin, the lining is fixedly connected with the liquid inlet pipe, the three-way pipe is fixedly connected to the wastewater cabin, the electric control lifter is fixedly connected to the mounting frame, the electric control lifter is fixedly connected to the main rail plate, the electric control translation machine is fixedly connected to the inner container, the inner container is internally provided with an inner container, the inner container is internally provided with a three-way pipe, the inner container is fixedly connected to the inner container, the inner container is fixedly connected to the inner container through the guide screw and the inner container, the inner container is fixedly connected to the inner container through the guide wire through the guide screw and the inner container through the guide wire through the fixed plate. As an improvement of the scheme, the chemical precipitation reaction reagent used by the primary sedimentation mechanism is a vulcanizing agent, the chemical precipitation reaction reagent used by the secondary sedimentation mechanism is lime milk, and the adsorption resin used by the ion exchange mechanism is CH-TI resin. The improved liquid inlet pipe is connected to the lining in rotating mode, the liquid inlet pipe is connected to the three-way pipe in rotating mode, the driven gear is fixedly connected to the liquid inlet pipe, the driving motor is installed on the three-way pipe, the driving gear is fixedly connected to the output shaft of the driving motor, the driving gear is meshed with the driven gear, and the slurry blad