CN215161278U

CN215161278U - Smelting wastewater treatment device

Info

Publication number: CN215161278U
Application number: CN202120249071.0U
Authority: CN
Inventors: 张晓秀; 韩剑波
Original assignee: Yunnan Xing Xian Environmental Science & Technology Co ltd
Current assignee: Yunnan Xing Xian Environmental Science & Technology Co ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-12-14
Anticipated expiration: 2031-01-29

Abstract

The utility model relates to a smelting wastewater treatment device, which belongs to the technical field of wastewater treatment, and comprises a vulcanization reaction tank (1), a 1# sedimentation tank (2), a 1# neutralization tank (3), a 2# sedimentation tank (4), a 2# neutralization tank (5), a 3# neutralization tank (6), a primary oxidation tank (7), a secondary oxidation tank (8) and a 3# sedimentation tank (9) which are connected in sequence through pipelines; an inlet and an outlet pipeline of the 2# neutralizing tank (5) are respectively provided with a defluorinating agent feeding port (10); an ammonia nitrogen removal agent feeding port (11) is arranged on the secondary oxidation tank (8); the utility model discloses need not increase terminal defluorinating equipment, through rationally setting up defluorinating agent addition point in deviating from ammonia nitrogen and heavy metal device, can reach the purpose of defluorinating when deviating from ammonia nitrogen and heavy metal, and can not deviate from the production influence to ammonia nitrogen.

Description

Smelting wastewater treatment device

Technical Field

The utility model belongs to the technical field of waste water treatment, specific theory relates to a smelt effluent treatment plant.

Background

Some company in Yunnan is mainly used for smelting metal copper, and polluted acid generated by purifying flue gas generated by roasting copper ores contains a lot of pollutants such as heavy metal, fluorine ions, ammonia nitrogen and the like. The waste acid treatment process adopts a vulcanization method and a lime iron salt method to remove heavy metals, and adds an ammonia nitrogen removing agent to remove ammonia nitrogen. The content of the fluoride ions in the wastewater treated by lime is about 20mg/l, and the wastewater cannot meet the requirement of the emission standard of industrial pollutants for copper, nickel and cobalt (GB 25467-2010) below 5 mg/l. The defluorinating agent is added into the ammonia nitrogen and heavy metal removing device, so that not only is the defluorination reaction violent, but also the sedimentation tank is easy to turn over and mix, and the effect of removing ammonia nitrogen is easily influenced. Meanwhile, the treated lime mud still contains overproof arsenic and other heavy metals and needs to be further treated according to hazardous wastes.

Therefore, the tail end waste water after the heavy metal and ammonia nitrogen are removed from the smelting waste water needs further defluorination, and a tail end waste water treatment device needs to be put into operation to further defluorinate the tail end waste water so as to lead the fluorine to reach the discharge standard.

Disclosure of Invention

In order to overcome the problem that exists among the background art, the utility model provides a smelt effluent treatment plant need not increase terminal defluorination equipment, through rationally setting up defluorination agent addition point in deviating from ammonia nitrogen and heavy metal device, can reach the purpose of defluorination when deviating from ammonia nitrogen and heavy metal, and can not deviate from to produce the influence to ammonia nitrogen.

In order to achieve the above purpose, the utility model is realized by the following technical scheme:

the smelting wastewater treatment device comprises a vulcanization reaction tank 1, a No. 1 sedimentation tank 2, a No. 1 neutralization tank 3, a No. 2 sedimentation tank 4, a No. 2 neutralization tank 5, a No. 3 neutralization tank 6, a primary oxidation tank 7, a secondary oxidation tank 8 and a No. 3 sedimentation tank 9 which are connected in sequence through pipelines; the inlet and outlet pipelines of the 2# neutralization tank 5 are respectively provided with a defluorinating agent inlet 10; the secondary oxidation tank 8 is provided with an ammonia nitrogen removal agent feeding port 11.

Preferably, a circulating pipe 12 is connected between the 3# sedimentation tank 9 and the outlet pipe of the 3# neutralization tank 6.

Preferably, a first-stage partition plate 13 and a second-stage partition plate 14 are arranged in the No. 2 sedimentation tank 4 to divide the No. 2 sedimentation tank 4 into three sedimentation areas; the height of the primary partition plate 13 is lower than that of the secondary partition plate 14; the 1# neutralization tank 3 and the 2# sedimentation tank 4 are connected by a pipeline inserted into the left side of the primary partition 13.

The utility model has the advantages that:

the utility model discloses an optimize defluorinating agent addition point in ammonia nitrogen removal and heavy metal device, realized smelting waste water and defluorinating in the desorption heavy metal and ammonia nitrogen, do not need additionally to increase terminal effluent treatment plant, improved smelting waste water treatment's economic nature, can not exert an influence to the desorption effect of ammonia nitrogen simultaneously, and can be with the fluorine desorption to below 4mg/L, realize discharge to reach standard.

The utility model discloses a before adding lime wash dearsenification, at preliminary dearsenification and other heavy metals in the vulcanization reaction tank earlier, the lime mud heavy metal that generates is lower, for ordinary solid useless, and is less to environmental hazard.

The utility model discloses a set up first grade baffle and second grade baffle in 2# sedimentation tank, and through the design that first grade baffle is less than the second grade baffle, divide 2# sedimentation tank cadmium into three settling zones, realize the tertiary sediment of sewage in same sedimentation tank, improved the operating efficiency of 2# sedimentation tank, the sedimentation efficiency also can improve; meanwhile, because the defluorinating agent is added for defluorination after the precipitation in the 2# sedimentation tank, the precipitation effect is strengthened before the defluorination, and the phenomenon that the mixing is generated in the defluorination reaction process to influence the subsequent defluorination and ammonia nitrogen effects can be effectively prevented.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural view of the No. 2 sedimentation tank of the present invention;

in the figure, a 1-vulcanization reaction tank, a 2-1# sedimentation tank, a 3-1# neutralization tank, a 4-2# sedimentation tank, a 5-2# neutralization tank, a 6-3# neutralization tank, a 7-primary oxidation tank, an 8-secondary oxidation tank, a 9-3# sedimentation tank, a 10-defluorination agent inlet, an 11-ammonia nitrogen removal agent inlet, a 12-circulation pipe, a 13-primary partition plate and a 14-secondary partition plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

As shown in the figure 1-2, the smelting wastewater treatment device comprises a vulcanization reaction tank 1, a 1# sedimentation tank 2, a 1# neutralization tank 3, a 2# sedimentation tank 4, a 2# neutralization tank 5, a 3# neutralization tank 6, a primary oxidation tank 7, a secondary oxidation tank 8 and a 3# sedimentation tank 9 which are connected in sequence through pipelines. And a circulating pipe 12 is connected between the 3# sedimentation tank 9 and an outlet pipe of the 3# neutralization tank 6 and used for circularly oxidizing the precipitation liquid after oxidation and impurity removal so as to improve the oxidation and impurity removal effect.

Sodium sulfide is added into the vulcanization reaction tank 1, vulcanization dearsenification and partial heavy metal are completed under an acidic condition, the dearsenification effect under the acidic condition is better, partial other heavy metal impurities are removed, and simultaneously, after primary dearsenification and heavy metal removal, the content of heavy metal in lime mud generated subsequently is lower, the lime mud is common solid waste and has less influence on the environment; alkaline solvent such as lime water is added into the neutralization tanks 1# 3 and 2# 5 and 3# to carry out neutralization reaction, so as to further remove residual impurities. Air is introduced into the primary oxidation tank 7 and the secondary oxidation tank 7 for further dearsenification, so that the dearsenification is more thorough.

And the inlet and outlet pipelines of the 2# neutralization tank 5 are respectively provided with a defluorinating agent inlet 10, and the defluorinating agent is added into the wastewater through the defluorinating agent inlet 10 to carry out defluorination reaction. Through setting up two defluorinating agent inlets 10, and set up defluorinating agent inlet 10 position after once neutralizing and twice sedimentation treatment, and before the oxidation, can effectively improve the defluorinating effect, and can avoid the defluorinating in-process to take place to turn over the phenomenon of mixing, avoid the influence to follow-up oxidation, deaminizing nitrogen procedure.

The secondary oxidation tank 8 is provided with an ammonia nitrogen removal agent inlet 11 for removing ammonia nitrogen during secondary oxidation.

A first-stage partition plate 13 and a second-stage partition plate 14 are arranged in the 2# sedimentation tank 4 to divide the 2# sedimentation tank 4 into three sedimentation areas; the height of the primary partition plate 13 is lower than that of the secondary partition plate 14; the 1# neutralization tank 3 and the 2# sedimentation tank 4 are connected by a pipeline inserted into the left side of the primary partition 13. Through set up one-level baffle 13 and second grade baffle 14 in 2# sedimentation tank 4, and be less than the design of second grade baffle 14 through one-level baffle 13, divide into three sedimentation zone with 2# sedimentation tank 4 cadmium, realize the tertiary sediment of sewage in same sedimentation tank, improved 2# sedimentation tank 4's precipitation efficiency. Meanwhile, because the defluorinating agent is added for defluorination after the precipitation in the 2# sedimentation tank 4, the precipitation effect is strengthened before the defluorination, and the effects of subsequent defluorination and ammonia nitrogen are effectively prevented from being influenced by the mixing generated in the defluorination reaction process.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. A smelting wastewater treatment device is characterized in that: the smelting wastewater treatment device comprises a vulcanization reaction tank (1), a 1# sedimentation tank (2), a 1# neutralization tank (3), a 2# sedimentation tank (4), a 2# neutralization tank (5), a 3# neutralization tank (6), a primary oxidation tank (7), a secondary oxidation tank (8) and a 3# sedimentation tank (9) which are sequentially connected through pipelines; an inlet and an outlet pipeline of the 2# neutralizing tank (5) are respectively provided with a defluorinating agent feeding port (10); and an ammonia nitrogen removal agent feeding port (11) is arranged on the secondary oxidation tank (8).

2. The smelting wastewater treatment plant according to claim 1, wherein: a circulating pipe (12) is connected between the 3# sedimentation tank (9) and the outlet pipe of the 3# neutralization tank (6).

3. The smelting wastewater treatment plant according to claim 1, wherein: a first-stage partition plate (13) and a second-stage partition plate (14) are arranged in the 2# sedimentation tank (4) to divide the 2# sedimentation tank (4) into three sedimentation areas; the height of the primary partition (13) is lower than that of the secondary partition (14); the connecting pipeline of the 1# neutralization tank (3) and the 2# sedimentation tank (4) is inserted into the left side of the first-stage partition plate (13).