CN-122010332-A - Integrated waste liquid treatment device

Abstract

The invention provides an integrated waste liquid treatment device which comprises a reaction tank assembly, wherein the reaction tank assembly comprises a first-stage reaction tank, a second-stage reaction tank, a third-stage reaction tank and a fourth-stage reaction tank which are sequentially connected in parallel, a first-stage stirring device and a liquid inlet are arranged at the top of the first-stage reaction tank, a desulfurization liquid pipe and an alkali liquid pipe are arranged above the liquid inlet and are communicated through a mixer, a first-stage reaction tank valve plate is arranged at the side part of the first-stage reaction tank, a first-stage reaction tank overflow port is arranged at the bottom of the first-stage reaction tank valve plate, and a first-stage reaction tank auger and a first-stage reaction tank bottom discharge valve are sequentially arranged at the bottom of the first-stage reaction tank. The invention integrates the multi-stage treatment function into a whole, can realize continuous, efficient and stable treatment of the heavy metal-containing desulfurization liquid wastewater, and solves the problems of large occupation, high investment and unstable operation of the traditional multi-equipment serial process.

Inventors

• CHI ZHANYANG
• LI JILIANG
• SONG ZHOU
• SHAO ZHICHAO
• WEI ZHIPING
• CHEN QIANG
• ZHANG ZIYUAN
• CHI JIAN
• TAN WEIBING
• ZHANG LIJUAN

Assignees

• 金川集团镍钴股份有限公司

Dates

Publication Date

20260512

Application Date

20260210

Claims (8)

1. 1. The integrated waste liquid treatment device is characterized by comprising a reaction tank assembly, wherein: The reaction tank assembly comprises a primary reaction tank (1), a secondary reaction tank (11), a tertiary reaction tank (18) and a quaternary reaction tank (25) which are sequentially connected in parallel; the top of the primary reaction tank (1) is provided with a primary stirring device (2) and a liquid inlet (3), a desulfurization liquid pipe (4) and an alkali liquid pipe (5) are arranged above the liquid inlet (3) and are communicated through a mixer (6), the side part of the primary reaction tank (1) is provided with a primary reaction tank valve plate (7), the bottom of the primary reaction tank valve plate (7) is provided with a primary reaction tank overflow port (8), and the bottom of the primary reaction tank (1) is sequentially provided with a primary reaction tank auger (9) and a primary reaction tank bottom discharge valve (10); the first-stage reaction tank auger (9) comprises a screw shaft (33), a reaction tank front tank body (41) and a reaction tank rear tank body (42), and the screw shaft (33) is sequentially inserted into the reaction tank front tank body (41) and the reaction tank rear tank body (42); A front reinforcing bottom plate (40) and a front bearing seat (34) are sequentially arranged at the joint of the front tank body (41) of the reaction tank and the outer wall of the screw shaft (33), and a front sealing device (35) is arranged between the front reinforcing bottom plate and the front bearing seat; a rear reinforcing bottom plate (43) and a rear bearing seat (39) are arranged at the joint of the rear tank body (42) of the reaction tank and the outer wall of the screw shaft (33), and a rear sealing device (38) is arranged between the rear reinforcing bottom plate and the rear bearing seat; the outer wall of the screw shaft (33) is provided with a front screw blade (36) and a rear screw blade (37), and the two screw directions are opposite.
2. 2. The device according to claim 1, wherein the top of the secondary reaction tank (11) is provided with a secondary stirring device (12) and a stabilizer inlet (13), the side part is provided with a secondary reaction tank valve plate (14), the bottom of the secondary reaction tank valve plate (14) is provided with a secondary reaction tank overflow port (15), and the bottom of the secondary reaction tank (11) is provided with a secondary reaction tank auger (16) and a secondary reaction tank bottom discharge valve (17) in sequence.
3. 3. The device according to claim 1, wherein the top of the three-stage reaction tank (18) is provided with a three-stage stirring device (19) and a biological agent inlet (20), the side part of the three-stage reaction tank is provided with a three-stage reaction tank valve plate (21), the bottom of the three-stage reaction tank valve plate (21) is provided with a three-stage reaction tank overflow port (22), and the bottom of the three-stage reaction tank (18) is provided with a three-stage reaction tank auger (23) and a three-stage reaction tank bottom discharge valve (24) in sequence.
4. 4. The device according to claim 1, wherein the top of the four-stage reaction tank (25) is provided with a four-stage stirring device (26) and a flocculant inlet (27), the side part is provided with a liquid outlet (28), and the bottom is provided with a four-stage reaction tank auger (29) and a four-stage reaction tank bottom discharge valve (30) in sequence.
5. 5. The device according to claim 1, characterized in that the screw shaft (33) is in drive connection with the speed reducer (31) via a coupling (32).
6. 6. The device according to claim 1, characterized in that the front bearing housing (34) and the rear bearing housing (39) are used for fixing the screw shaft (33).
7. 7. The device according to claim 1, characterized in that the front sealing means (35) and the rear sealing means (38) are arranged to seal both ends of the screw shaft (33) against leakage of material.
8. 8. The device according to claim 1, wherein the first-stage reactor auger (9), the second-stage reactor auger (16), the third-stage reactor auger (23) and the fourth-stage reactor auger (29) are identical in structure and operation principle.

Description

Integrated waste liquid treatment device Technical Field The invention belongs to the technical field of wastewater recovery, and relates to an integrated waste liquid treatment device. Background After desulfurization treatment, a large amount of desulfurization liquid wastewater is associated with the ring-collected flue gas generated in the nonferrous metal smelting process. The wastewater contains high-concentration nickel, copper and other heavy metals, and further comprises arsenic and other toxic elements, if the wastewater is not treated effectively, the wastewater is directly discharged outwards to cause serious pollution to water, soil and ecological environment, and the wastewater does not meet the increasingly strict industrial wastewater discharge standard, in addition, the conventional single treatment method is difficult to realize stable standard discharge or recycling due to complex heavy metal form and large concentration fluctuation, so that the wastewater is accumulated for a long time, and the wastewater becomes an important difficult problem for restricting the green production and sustainable development of smelting enterprises. At present, the treatment technology for the wastewater containing heavy metals mainly comprises a chemical precipitation method, an ion exchange method, an adsorption method, a membrane separation method, a biological method and the like. Among them, the chemical precipitation method is widely used because of simple operation and low cost, but has limited synchronous removal effect on a plurality of heavy metal coexisting systems, and is easy to produce a large amount of heavy metal-containing sludge, thereby bringing secondary pollution. Biological methods, particularly multi-group complexing techniques based on biological agents, are becoming research hotspots gradually, as they are able to form stable complexes with a variety of heavy metal ions and achieve selective removal. The technology can realize the synergic purification of multi-metal ions such as nickel, copper, arsenic and the like through the coordination, flocculation and the like of active groups in biological agents and heavy metals. However, the existing biological agent treatment process generally depends on multiple reaction devices to operate in series, including multi-stage unit operations such as neutralization, oxidation, cooperation, flocculation and the like, so that the process flow is long, the occupied area of the devices is large, and the construction and operation costs are high. In addition, the problems of unsmooth material conveying, uneven control of reaction conditions, poor system stability and the like easily occur at the joint of multiple devices, and the overall treatment efficiency and stability are affected. Therefore, developing an integrated treatment device with compact structure, flexible operation and high integration level to realize continuous, efficient and stable treatment of desulfurization liquid wastewater and meet recycling or standard discharge requirements has become a technical requirement to be solved in the field. Disclosure of Invention The invention aims to solve the problems of large occupied area, high investment and complex operation control existing in the prior art by providing an integrated waste liquid treatment device and solving the problems that a plurality of devices are required to be connected in series in the prior multi-group matching technology based on biological agents. For this purpose, the invention adopts the following technical scheme: the integrated waste liquid treatment device comprises a reaction tank assembly, wherein: the reaction tank assembly comprises a first-stage reaction tank, a second-stage reaction tank, a third-stage reaction tank and a fourth-stage reaction tank which are sequentially connected in parallel. The top of the primary reaction tank is provided with a primary stirring device and a liquid inlet, a desulfurization liquid pipe and an alkali liquid pipe are arranged above the liquid inlet and are communicated through a mixer, the side part of the primary reaction tank is provided with a primary reaction tank valve plate, the bottom of the primary reaction tank valve plate is provided with a primary reaction tank overflow port, and the bottom of the primary reaction tank is sequentially provided with a primary reaction tank auger and a primary reaction tank bottom discharge valve. The top of the secondary reaction tank is provided with a secondary stirring device, a stabilizer inlet, a secondary reaction tank valve plate is arranged on the side part of the secondary reaction tank, the bottom of the secondary reaction tank valve plate is provided with a secondary reaction tank overflow port, and the bottom of the secondary reaction tank is sequentially provided with a secondary reaction tank auger and a secondary reaction tank bottom discharge valve. The top of the three-stage reaction tank is provided wit