Using method of compound mineral medicament

Abstract

The invention relates a using method of a compound mineral medicament. The compound mineral medicament comprises an A medicament formed through spiral extruding granulation by using magnesium mineraland NaOH as raw materials and a B medicament formed through high-speed tabletting by using Ca(OH)2, the magnesium mineral and NaOH as raw materials respectively. Raw water in a lead-acid storage battery enterprise goes through a raw water tank, an oil separation tank, an A medicament dosing tank, an A medicament reaction tank, a B medicament dosing tank, a C medicament dosing tank, a polyacrylamide (PAM) flocculation tank, an inclined plate sedimentation tank, a mechanical filter and a clean water tank which are connected in sequence, so that effluent water reaches the standard. According to the using method of the compound mineral medicament, NaOH can be replaced, so that the risk and cost of wastewater treatment are reduced, the addition of sodium salt is avoided, the concentration of sulfate is reduced, the conductivity is lowered, and the reuse of recycled water is realized; and callback is carried out without using sulfuric acid in the treatment process, so that close-loop production of lead element is guaranteed.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to the technical field of lead-acid wastewater treatment. Background technique [0002] China has become the world's largest producer, consumer and exporter of lead-acid batteries. The battery equipment technology of some enterprises is close to the world's advanced level. Part of the advanced technologies of a group of domestic lead-acid battery manufacturers such as Tianneng, Chaowei and Leoch have reached the international leading level. But on the whole, my country's lead-acid battery industry still has problems such as large number of production enterprises, small scale, and uneven quality. There are still many small and medium-sized enterprises still using backward technology, which leads to serious environmental pollution and waste of resources and energy. These problems restrict the healthy development of my country's lead-acid battery industry. More attention mus...

AI Technical Summary

Problems solved by technology

There are the following problems: (1) Due to the fluctuation of the lead content and the acid content in the raw water, the total lead content fluctuates, and there are deviations in the measurement, especially the tail lead content is difficult to control stably; (2) The introduction of cation Na + sodium salt leads to conductivity High, the membrane equipment has the problem of secondary pollution: (3) it does not have the function of degrading COD and ammonia nitrogen at the same time; (4) the alum flowers after caustic soda treatment are not easy to settle, resulting in the phenomenon of mud running in the inclined plate tank that cannot be effectively controlled; (5) caustic soda It is highly corrosive and has hidden dangers in production safety; (6) The sludge produced after the wastewater treated with sodium hydroxide cannot be used

The one-step purifier occupies less land, saves energy consumption, and is easy to operate, but there are also some defects in the operation of treating lead-containing wastewater

First, due to pH fluctuations in lead-containing wastewater, pH control hysteresis will occur during continuous operation, and it is not easy to control the appropriate pH in the precipitation reaction section, and the neutralization of lead ions has a high pH requirement, such as in If the required pH is not controlled during the neutralization process, the waste water will enter the second-step reaction process, which will reduce the treatment effect of the neutralization process.

The second is that if the wastewater after neutralization and precipitation is not removed by effective filtration and other processes and directly enters the coagulation and precipitation treatment process, it is easy to cause Pb(OH) pollution due to changes in pH. 2 Analysis of sediment

The third is that the lead concentration in the wastewater will also change during the treatment process, which will make it difficult to control the dosing amount in the flocculation and sedimentation treatment process, resulting in unstable lead concentration in the wastewater

[0013] However, the lead content of the sludge (board mud) after the treatment of existing lead-containing acid sewage is basically about 0.5%, which does not have smelting value.

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