Device and method for sewage collaborative reutilization comprehensive treatment

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] like figure 1 Shown is a comprehensive sewage collaborative resource treatment device, including material heating device, solid-liquid separation device, oil-water separation device, crushing device, sand removal device, adjustment device, heat exchange device, hydrolysis acidification device, anaerobic fermentation device And flocculation dehydration device.

[0038] The material heating device heats the material at high temperature and sends it to the solid-liquid separation device; the material heating device includes a material receiving heating tank, a steam boiler and a deodorizer, the steam boiler heats the material receiving heating tank, and the The deodorizer deodorizes the material receiving heating tank.

[0039] The solid-liquid separation device performs solid-liquid separation on the materials, sorts out oil and water, metals, light substances, sundries and remaining circulating materials, and sends the oil and water to the oil-water separating device, and sends the remaining circulating materials to the crushing device The solid-liquid separation device includes a solid-liquid separator, a magnetic separator and a wind separator, the solid-liquid separator carries out solid-liquid separation to the material, and the magnetic separator separates the solid-liquid material from the solid-liquid separator. The materials are magnetically separated, and the wind separator performs wind separation on the solid materials separated by the magnetic separator; wherein the solid-liquid separator is an extrusion belt empty screen, and the extrusion belt empty screen adopts It is made of non-toxic and corrosion-resistant materials, and its mesh aperture is in the range of 0.6-3mm; the magnetic separator is a circulating mobile magnetic separation device.

[0040] The oil-water separation device performs oil-water separation on materials to produce crude oil and water, and sends the water to the crushing device; the oil-water separation device is a two-stage high-speed centrifuge.

[0041] The crushing device crushes the solid material, mixes the crushed solid material and the liquid material to generate milk slurry, and sends the milk slurry to the sand removal device.

[0042] The desanding device sends the material to the regulating device after desanding, and the desanding device is a desanding tank.

[0043] The regulating device adjusts the flow rate, pH value and solid content of the material and sends it to the heat exchange device, and the regulating device is a regulating tank.

[0044] The heat exchange device performs heat exchange on the material and sends it to the hydrolysis acidification device.

[0045] The hydrolytic acidification device hydrolyzes and acidifies the feed water and then sends it to the anaerobic fermentation device, and the hydrolysis acidification device is a hydrolysis tank.

[0046] The anaerobic fermentation device performs anaerobic digestion treatment on materials to generate biogas and fermented materials, and sends the fermented materials to a flocculation dehydration device; the anaerobic fermentation device is a high-efficiency anaerobic reactor.

[0047] The flocculation and dehydration device performs flocculation and dehydration treatment on materials to generate biogas residue and biogas.

[0048] A comprehensive treatment method based on the above-mentioned device for synergistic resource utilization of sewage, comprising the following steps:

[0049] (1) Solid-liquid separation: use high-temperature steam (above 100°C) to process mixed waste such as kitchen waste, landscaping waste, and urban municipal sludge for 1~2 hours, and then use a solid-liquid separation device for solid-liquid separation and sorting , specifically: leach out the oil and water in the mixed garbage, and magnetically separate out metals, winnow out plastics, fibers and other lightweight materials, remove sundries, and keep recycled raw materials; landfill sundries;

[0050] (2) Oil-water separation: Send the oil and water leached in step (1) to a two-stage high-speed centrifuge for separation to produce crude oil and water, and then further purify and refine the obtained crude oil to make biodiesel;

[0051] (3) Pulverization and pulping: pulverize the recycled raw materials remaining in step (1), and then mix the water produced in step (2) to make emulsion containing organic particles;

[0052] (4) Desanding adjustment: Send the milk slurry obtained in step (3) into the desanding tank for desanding, and then send it into the regulating tank to adjust the flow rate, PH value and solid content, so that the front end work of the regulating tank and the follow-up work are in phase. match;

[0053] (5) Hydrolysis and acidification: The milk slurry flowing out of the regulating tank is subjected to heat exchange treatment, and then sent to the hydrolysis tank for hydrolysis and acidification treatment, and the macromolecular water in the emulsion is decomposed and converted into small and medium-sized organic acids;

[0054] (6) Anaerobic fermentation: The milk slurry after hydrolysis and acidification is transported to the high-efficiency anaerobic reactor through pipelines for high-temperature and medium-temperature two-stage anaerobic digestion treatment, which further reduces the number of molecules and is finally converted into biogas (mainly methane) and Fermented materials; the temperature of high-temperature anaerobic digestion is 50-55°C, and the temperature of medium-temperature anaerobic digestion is 35-38°C; the carbon-nitrogen ratio (C:N) of anaerobic digestion materials is controlled at 25:1~30: 1, the pH value is controlled within the range of 6.5 to 7.8, the solid content of the anaerobic digestion material is controlled within the range of 8% to 18%, and the residence time of the anaerobic digestion material is not less than 15 days;

[0055] (7) Biogas utilization: After desulfurization, purification and purification, the biogas obtained in step (6) is used for power generation, heating or gas production, and part of the heating energy is recycled as high-temperature steam in step (1);

[0056] (8) Fertilizer making: flocculate and centrifugally dehydrate the fermented material obtained in step (6) to produce biogas residue and biogas slurry, and the biogas residue is made into organic Fertilizer, the biogas slurry is circulated to the hydrolysis acidification step or concentrated to make liquid fertilizer.

[0057] The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also possible. It should be regarded as the protection scope of the present invention.