CN204803146U - Contain thallium effluent treatment plant - Google Patents

Abstract

The utility model discloses a treatment device for thallium-containing wastewater, which comprises a dissolved air reactor connected in sequence, a first-stage oxidation pool, a first-stage neutralization reaction pool, dry residue filtering equipment, a second-stage oxidation pool, a second-stage neutralization reaction pool and a surface filter; the dissolved gas reactor is connected with a regulating tank, the dissolved gas reactor is also connected with an oxidant storage tank and a dilute acid storage tank, and the upper end of the dissolved gas reactor is provided with an air inlet; a neutralization reaction tank and dry residue filtering equipment The first liquid inlet pump and the first anti-interference water processor are arranged in series; the oxidant storage tank is arranged on the second-stage oxidation pool; the second liquid inlet is arranged in series between the second-stage neutralization reaction pool and the surface filter pump and the second anti-jamming water processor; the surface filter is also connected with a clear liquid tank. The utility model has obvious treatment effect, stable operation, alleviates the fouling problem of the existing equipment, increases the service life of the equipment, has a small amount of slag discharged after treatment and has a low water content in the waste slag, and is convenient for transportation or further treatment.

Description

A device for treating thallium-containing wastewater

technical field

The utility model relates to a treatment device for thallium-containing wastewater, in particular to a treatment device for thallium-containing wastewater involved in mining and smelting, mineral industry and iron and steel smelting industry.

Background technique

Thallium is a rare element that exists in trace amounts in sulfide minerals such as iron and zinc. In thallium smelting plants, thermal power plants, and various thallium-containing materials and pharmaceutical manufacturing processes, thallium-containing waste gas, waste water, and waste residues will enter the environment and cause pollution. Because of its bioaccumulation and high toxicity, it has gradually become the focus of attention. The toxicity of thallium to mammals is second only to methyl mercury, but far greater than that of mercury, lead, and arsenic, and its toxicity is more than three times that of arsenic oxide. Thallium generally exists in the form of Ti+ in water bodies, and it is difficult to settle naturally.

At present, a large number of researches on the treatment of thallium-containing wastewater have been carried out at home and abroad, and there are many treatment methods. The U.S. Environmental Protection Agency recommends the use of activated alumina and ion exchange to treat wastewater containing thallium by adsorption and separation, but the treatment cost is high; saturated sodium chloride solution can promote the effective precipitation of thallium in wastewater in the form of thallium chloride, but this method will increase the salinity. The adsorption and separation method has obvious effect on the removal of other ions in wastewater. However, if various environmentally friendly adsorption materials, environmental mineral materials or biosorbents are used for the adsorption and separation of thallium in wastewater, the operation process of this method is complicated under medium conditions, and it is difficult to popularize and apply. in the actual industrial production process.

Therefore, in view of the above problems in the treatment of thallium-containing wastewater, the utility model adopts a set of continuous operation treatment device to treat the thallium-containing wastewater involved in mining and smelting, mineral industry and iron and steel smelting industry, and realizes thallium-containing wastewater. Effective reuse and standard discharge of wastewater, and automatic control can be used, which not only saves costs but also improves treatment efficiency.

Utility model content

The purpose of this utility model is to provide a treatment device for thallium-containing wastewater to overcome the shortcomings of the prior art. in production.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a thallium-containing wastewater treatment device, including a dissolved air reactor, a first-stage oxidation pool, a first-stage neutralization reaction pool, dry residue filtering equipment, a second-stage oxidation pool, Two-stage neutralization reaction pool and surface filter;

The dissolved gas reactor is connected with a regulating tank, an oxidant storage tank and a dilute acid storage tank, and the upper end of the dissolved gas reactor is provided with an air inlet;

The one-stage neutralization reaction pool includes a section of first-level neutralization reaction pool, one section of second-level neutralization reaction pool and one section of three-stage neutralization reaction pool connected in sequence; one section of three-stage neutralization reaction pool and the dry residue filter equipment There are the first liquid inlet pump and the first anti-jamming water processor connected in series;

An oxidant storage tank is arranged on the second stage oxidation pool;

The two-stage neutralization reaction pool includes a second-stage primary neutralization reaction pool, a second-stage secondary neutralization reaction pool, and a second-stage three-stage neutralization reaction pool connected in sequence; the second-stage three-stage neutralization reaction pool and surface filtration A second liquid inlet pump and a second anti-jamming water processor are connected in series between the devices.

Further, a lift pump is provided between the dissolved gas reactor and the regulating tank.

Further, the dry residue filtering equipment includes two parallel automatic backwashing surface filter dry residue equipment.

Further, the surface filter includes two parallel automatic backwash surface filters.

Further, the surface filter is also connected with a clear liquid pool.

Further, the upper end of the automatic backwashing surface filter dry slag equipment is provided with an air inlet, the lower end is a conical structure, and the lower end of the cone is provided with a dry slag outlet with a valve. The automatic backwash surface filter dry slag equipment The dry slag outlet is connected to the dry slag export equipment, and the automatic backwash surface filter dry slag equipment is equipped with a filter bag in the conical structure.

Further, the lower end of the self-backwashing surface filter is provided with a return port, which is connected to a section of a three-stage neutralization reaction pool through a pipeline.

Compared with the prior art, the utility model has the following beneficial technical effects:

The utility model is sequentially connected through a dissolved gas reactor, a first-stage oxidation pool, a first-stage neutralization reaction pool, dry residue filtering equipment, a second-stage oxidation pool, a second-stage neutralization reaction pool and a surface filter; the waste water undergoes two-stage oxidation, and two The three-stage neutralization reaction and filtration have achieved the effect of reducing waste water discharge and even achieving zero discharge. On the other hand, it has saved a lot of fresh water resources and produced good economic benefits; The effect is obvious, the operation is stable, the scaling problem of existing equipment is reduced, and the service life of the equipment is increased. After treatment, the amount of slag discharged is small and the moisture content of the waste slag is low, which is convenient for transportation or further treatment.

Further, a lift pump is provided between the dissolved air reactor and the regulating tank, so that the waste water can enter the dissolved air reactor in a timely and effective manner.

Further, the automatic backwashing surface filter dry slag equipment is equipped with a filter bag, which can effectively filter the dry slag and discharge it from the dry slag outlet.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among them, 1. Regulating tank; 2. Lifting pump; 3. Dissolved gas reactor; 4. Oxidant storage tank; 5. Dilute acid storage tank; One-stage secondary neutralization reaction pool; 9. One-stage three-stage neutralization reaction pool; 10. First liquid inlet pump; 11. Automatic backwash surface filter dry residue equipment; 12. Second-stage oxidation pool; 13. Second stage one 14. Second-stage neutralization reaction pool; 15. Second-stage three-stage neutralization reaction pool; 16. Second anti-interference water processor; 17. Automatic backwash surface filter; 18. Cleaning Liquid pool; 19. Dry slag transport equipment; 20. The second liquid inlet pump; 21. The first anti-jamming water processor.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1, a thallium-containing wastewater treatment device includes a dissolved air reactor 3 connected in sequence, a first-stage oxidation tank 6, a first-stage neutralization reaction tank, dry residue filtering equipment, a second-stage oxidation pool 12, and a second-stage neutralization Reaction cells and surface filters;

The dissolved air reactor 3 is connected with a regulating tank 1 for storing waste water containing thallium, and a lifting pump 2 is provided between the dissolved air reactor 3 and the regulating tank 1 for transporting the waste liquid containing thallium, and the dissolved gas reacts An oxidant storage tank 4 and a dilute acid storage tank 5 are also connected to the device 3, an air inlet is provided at the upper end of the dissolved gas reactor 3, and one section of the neutralization reaction pool includes a section of the first-level neutralization reaction pool 7, a section of the second One-stage neutralization reaction pool 8 and one section of three-stage neutralization reaction pool 9; one section of three-stage neutralization reaction pool 9 and the dry residue filter equipment are provided with a first liquid inlet pump 10 and a first anti-interference water processor 21 connected in series , the dry residue filter equipment includes several parallel automatic backwashing surface filter dry residue equipment 11; the second stage oxidation tank 12 is provided with an oxidant storage tank 4; the second stage neutralization reaction pool includes two consecutive stages One-stage neutralization reaction pool 13, two-stage secondary neutralization reaction pool 14, two-stage three-stage neutralization reaction pool 15; second section three-stage neutralization reaction pool 15 and the surface filter are provided with the second inlet in series Liquid pump 20 and the second anti-jamming water processor 16, described surface filter comprises several parallel automatic backwash surface filters 17; Surface filter is also connected with clear liquid pool 18; Automatic backwash surface filter dry residue The upper end of the equipment 11 is provided with an air inlet, the lower end is a conical structure, and the lower end of the conical shape is provided with a dry slag outlet with a valve. The dry slag outlet of the automatic backwashing surface filter dry slag equipment 11 is connected with a dry slag export device 19 The automatic backwashing surface filter dry residue equipment 11 is provided with a filter bag in the conical structure; the lower end of the automatic backwashing surface filter 17 is provided with a return port, which is connected to a section of three-stage neutralization reaction pool 9 through a pipeline.

The entire filtration, recoil and slag discharge processes handled by the utility model are all automatically controlled by the integrated controller.

Below in conjunction with accompanying drawing, structural principle of the present utility model and operation steps are further described:

As shown in Figure 1, first, the thallium-containing wastewater in the regulating tank 1 enters the dissolved air reactor 3 through the lift pump 2, and the dilute acid enters the dissolved air reactor 3 from the dilute acid storage tank 4 to acidify the wastewater; The storage tank 5 enters the dissolved gas reactor 3, and at the same time, compressed air is passed into the dissolved gas reactor 3 through the air inlet on the dissolved gas reactor 3, and the gas is better dissolved into the liquid under the action of pressure, realizing gas-liquid Effectively and fully mixed, the mixed liquid enters the first-stage oxidation tank 6, and a strong oxidant is added to carry out a sufficient first-stage oxidation reaction to convert Ti+ into Ti3+; the liquid after the first-stage oxidation reaction enters the first-stage neutralization reaction pool 7, and then passes through Lime powder is directly added to the waste water in the first-stage neutralization reaction pool 7 to carry out the first-stage neutralization reaction, and the water after the adjustment reaction enters the second and third-stage reaction pools 8 and 9 to fully react. The waste water is fed into the automatic backwashing surface filter dry slag equipment 11 by the first liquid inlet pump 10 through the liquid inlet pipe equipped with the first anti-jamming water processor 16 for filtering.

2) During the filtering process of the automatic backwash surface filter dry residue equipment 11, the air inlet is closed, and the solid particles and suspended solids in the filtered wastewater are blocked by the filter bags in the automatic backwash surface filter dry residue equipment 11. When the membrane surface reaches a certain thickness, the filter automatically enters the backwashing state, and the filter cake after backwashing quickly breaks away from the filter membrane surface and settles to the conical bottom of the automatic backwashing surface filter dry residue equipment 11. When the conical bottom When the filter residue accumulates to a certain amount, the valve at the lower end is automatically opened to discharge the filter residue, and finally transported outside for treatment; the filtrate enters the second-stage oxidation tank 12 for further processing.

3) The supernatant after being filtered by a section of automatic backwashing surface filter dry residue equipment 11, overflows into the second-stage oxidation pool 12, and after a section of tertiary reaction, under the condition of alkalinity, the oxidizing agent is directly added, and the remaining The Ti+ is oxidized to Ti3+, which is beneficial to the precipitation reaction, and then lime is directly added in the first-stage reaction tank 13 of the second section to carry out the first-level neutralization reaction of the second section, and iron salt is added in the second-stage reaction tank 14 of the second section to carry out the flocculation reaction. The reacted waste water enters the second-stage three-stage reaction pool 15 to fully react, and the reacted waste water is input to the automatic backwash surface filter 17 by the second liquid inlet pump 20 through the liquid inlet pipe equipped with the second anti-interference water processor 16 Carry out the final filtration process.

4) After filtering, the clear liquid enters the clear liquid pool 18, and is reused in the system or discharged up to the standard; the slurry is returned to a section of automatic backwashing surface filter dry residue equipment 11 for further processing.

Claims (8)

1. a thallium-containing waste water treatment device is characterized in that it comprises successively connected dissolved air reactors (3), one-stage oxidation pond (6), one-stage neutralization reaction pond, dry residue filtering equipment, two-stage oxidation pond (12 ), two-stage neutralization reaction tank and surface filter; The dissolved gas reactor (3) is connected with a regulating tank (1), an oxidant storage tank (4) and a dilute acid storage tank (5), and the upper end of the dissolved gas reactor (3) is provided with an air inlet; The one-stage neutralization reaction pool includes a section of one-stage neutralization reaction pool (7), one section of secondary neutralization reaction pool (8) and one section of three-stage neutralization reaction pool (9) connected in sequence; one section of three-stage neutralization reaction pool (9); A first liquid inlet pump (10) and a first anti-interference water processor (21) connected in series are arranged between the pool (9) and the dry residue filtering equipment; The two-stage neutralization reaction pool includes two consecutive first-stage neutralization reaction pools (13), two second-stage neutralization reaction pools (14), and two third-stage neutralization reaction pools (15); A second liquid inlet pump (20) and a second anti-jamming water processor (16) are arranged in series between the three-stage neutralization reaction pool (15) and the surface filter. 2. A thallium-containing wastewater treatment device according to claim 1, characterized in that a lift pump (2) is provided between the dissolved air reactor (3) and the regulating tank (1). 3. A treatment device for thallium-containing wastewater according to claim 1, characterized in that the dry residue filtering equipment includes several parallel automatic backwashing surface filter dry residue equipment (11). 4. A treatment device for thallium-containing wastewater according to claim 1, characterized in that the surface filter comprises several parallel automatic backwash surface filters (17). 5. The device for treating thallium-containing wastewater according to claim 4, characterized in that the surface filter is also connected with a clear liquid pool (18). 6. A kind of thallium-containing wastewater treatment device according to claim 3, characterized in that, the upper end of the automatic backwash surface filter dry slag equipment (11) is provided with an air inlet, and the lower end is a conical structure. The lower end is provided with a dry slag outlet with a valve, and the dry slag outlet of the automatic backwash surface filter dry slag equipment (11) is connected with dry slag export equipment (19), and the automatic backwash surface filter dry slag equipment (11) A filter bag is provided inside the conical structure. 7. A kind of thallium-containing wastewater treatment device according to claim 5, characterized in that, the lower end of the automatic backwash surface filter (17) is provided with a return port, which is connected to a section of three-stage neutralization reaction pool ( 9). 8. The device for treating thallium-containing wastewater according to claim 1, characterized in that, the second-stage oxidation tank (12) is provided with an oxidant storage tank (4).