Tin-containing sludge treatment method

A treatment method and sludge technology, applied in sludge treatment, water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, etc., can solve problems such as complex treatment process, high energy consumption, equipment corrosion, etc. Achieve the effect of simple process and low process energy consumption

CN109896721AInactive Publication Date: 2019-06-18宝武集团环境资源科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-06-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a tin-containing sludge treatment method which includes the steps: mixing tin-containing sludge and pure water to obtain slurry; performing solid-liquid separation on the slurry to obtain filter liquid and a solid-phase material; heating the solid-phase material to obtain a tin oxide product; filtering the filter liquid to obtain produced water and filter residues, takingstandard produced water in a the device as pure water to be reused, and selecting matched electroplating solution to return to production or enter an incinerator according to specific circumstances after concentrated solution reaches to a certain concentration. The method has the advantages that compared with the prior art, hazardous waste is quantitatively treated, a whole process is low in energy consumption, zero emission is achieved, a technological process is simple, and commercialization is facilitated.
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Description

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular provides a resource disposal method for tin-containing sludge produced in an electroplating process. Background technique

[0002] Tin-containing sludge is mainly produced in the electroplating tin production line, with a pH value of about 3 to 4. The sludge contains PSA organic acid, which belongs to the national hazardous waste category HW17. The main pollutant indicators to be treated are: organic acid PSA ( Different companies use different formulations of electroplating solutions, and the choice of acid is not the same) and oxides of tin, iron, lead and other metals.

[0003] Since tin-containing sludge is a hazardous waste, the treatment process is relatively complicated. At present, the treatment of tin-containing sludge in the market is generally into the smelting furnace, which seriously corrodes the equipment and consumes a lot of energy. SUMMARY OF ...

Examples

Embodiment 1

[0030] This embodiment relates to a treatment method of tin-containing sludge, such as figure 1 shown, including the following steps:

[0031] 1. The electroplating solution prepared with PSA as the solution is tested and analyzed on the tin-containing sludge after the electroplating production line. The detected pH value is 1-2, and the COD content is 3.5×10 4 mg / l, the moisture content is 50-65%, and the production line process parameters are adjusted to the parameters suitable for the production of this material;

[0032] 2. Mix tin-containing sludge and pure water, stir in a mixing tank for 30 minutes, and prepare a slurry with a solid content of 1-20%;

[0033] 3. Put the mud into the plate and frame filter press through the material pump, and separate it into filtrate and solid phase, wherein, the content of each component in the solid phase is shown in Table 3;

[0034] 4. Heat treatment at 300-650°C after the solid phase is collected to obtain a tin oxide product, wh...

Embodiment 2

[0038] This embodiment relates to a treatment method for tin-containing sludge, comprising the steps of:

[0039] 1. The electroplating solution prepared with sulfuric acid is tested and analyzed on the tin-containing sludge after the electroplating production line. The detected pH value is 1-2, and the moisture content is 50-65%. Adjust the process parameters of the production line to be suitable for this material production parameters;

[0040] 2. Mix the tin-containing sludge and pure water into slurry according to a certain weight ratio, and stir in the mixing tank for 30 minutes;

[0041] 3. Put the mud into the solid-liquid separation equipment through the material pump, and separate it into filtrate and solid phase, wherein the contents of each component in the solid phase are shown in Table 3;

[0042] 4. Heat treatment at 300-650°C after the solid phase is collected to obtain tin oxide products, which are packaged and put into storage;

[0043] 5. After the filtrate...