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Method and device for respectively extracting and using inorganic matters in sludge

An inorganic matter and sludge technology, applied in the direction of inorganic chemistry, sludge treatment, chemical instruments and methods, etc., can solve the problems of waste of inorganic matter resources, serious secondary pollution, etc., and achieve improved utilization rate, less impurity content, and high purity high effect

Inactive Publication Date: 2016-10-12
TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims to provide a harmless, resourceful, reduced, high-purity method for separately extracting and utilizing the inorganic matter in the sludge, which solves the serious secondary pollution in the prior art, and the inorganic waste of resources, etc.

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  • Method and device for respectively extracting and using inorganic matters in sludge
  • Method and device for respectively extracting and using inorganic matters in sludge
  • Method and device for respectively extracting and using inorganic matters in sludge

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Embodiment 1

[0048] A device for separately extracting and utilizing inorganic substances in sludge, including a pretreatment device, an inorganic salt extraction device, a primary sedimentation device and a primary filtration device connected in sequence, the primary sedimentation device is connected with the secondary sedimentation device, and the secondary sedimentation device It is connected with the secondary filtering device, and also includes an organic matter treatment device, which is connected with the inorganic salt extraction device.

[0049] The specific implementation process is as follows:

[0050] The sludge used comes from a water supply plant with a water content of 80%. Among the components of the sludge sample for analysis, the iron ion concentration is 1.7g / L, and the aluminum ion concentration is 9.4g / L. Pass the sludge into the pretreatment device, adjust the sludge into a sludge solution with a water content > 85%, add an acidic solution to the sludge solution for p...

Embodiment 2

[0052] Such as figure 2 As shown, a device for separately extracting and utilizing the inorganic substances in the sludge, including a pretreatment device, an inorganic salt extraction device, a primary sedimentation device and a primary filtration device connected in sequence, the primary sedimentation device is connected with the secondary sedimentation device, and the secondary sedimentation device is connected in sequence. The secondary precipitation device is connected with the secondary filtration device, the secondary precipitation device is connected with the tertiary precipitation device, the tertiary precipitation device is connected with the tertiary filtration device, the tertiary precipitation device is connected with the fourth precipitation device, and the fourth precipitation device is connected with the fourth filtration device, The fourth settling device is connected with the fifth settling device, the fifth settling device is connected with the fifth filteri...

Embodiment 3

[0058] A device for separately extracting and utilizing inorganic substances in sludge, including a pretreatment device, an inorganic salt extraction device, a primary sedimentation device and a primary filtration device connected in sequence, the primary sedimentation device is connected with the secondary sedimentation device, and the secondary sedimentation device It is connected with the secondary filtration device, the secondary precipitation device is connected with the tertiary precipitation device, the tertiary precipitation device is connected with the tertiary filtration device, the tertiary precipitation device is connected with the fourth precipitation device, the fourth precipitation device is connected with the fourth filtration device, and the fourth precipitation device is connected with the fourth precipitation device. The device is connected with the fifth sedimentation device, and the fifth sedimentation device is connected with the fifth filtration device, an...

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Abstract

The invention provides a method for respectively extracting and using inorganic matters in sludge, and belongs to the technical field of sludge treatment. The method comprises the following steps: (1) pretreating the sludge; (2) extracting inorganic salt from a sludge solution subjected to pretreatment; (3) adding a precipitant a1 into the inorganic salt extracting solution obtained in the step (2) till precipitates are separated, and forming inorganic salt A1 for recycling; (4) adding a precipitant a2 into precipitate-removed supernate in the step (3) till precipitates are separated, and forming inorganic salt A2 for recycling; (5) by parity of reasoning, adding a precipitant an into the precipitate-removed supernate in the former step till precipitates are separated, forming inorganic salt An for recycling. According to the method, the inorganic matters in the sludge are respectively recycled, so that weight reduction for the sludge is realized, and resource utilization of the sludge is also realized; the method is simple in process, high in applicability, simple and convenient to operate, easy to control, low in operating cost, good in treatment effect, wide in application range and easy to popularize and use.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a method and a device for separately extracting and utilizing inorganic substances in sludge. Background technique [0002] Sludge is a solid sediment produced in the process of sewage treatment. Due to the wide variety of sewage, the composition of sludge is complex, including sediment, fiber, microbial residue, organic matter, nitrogen and phosphorus and other nutrients, heavy metals, pathogenic bacteria and other components. Sludge sanitary landfill is to dump municipal sludge directly into lowlands or valleys after simple sterilization treatment. Its treatment cost is low and does not require high dehydration. More and more limited, and the harmful substances contained in the sludge will pollute the groundwater environment through the erosion and infiltration of rainwater; sludge incineration can remove the organic matter and water in the sludge, kill pathogens, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/00C01B25/36C01B25/37C01B33/20C01F7/02C01G3/00C01G3/02C01G9/02C01G11/00C01G11/02C01G13/04C01G21/12C01G21/20C01G21/21C01G49/02C01G53/04C01G53/06C01G53/11C05B17/00
CPCC01B25/36C01B25/37C01B33/20C01F7/02C01G3/00C01G3/02C01G9/02C01G11/00C01G11/02C01G13/04C01G21/12C01G21/20C01G21/21C01G49/02C01G53/04C01G53/06C01G53/11C02F11/00C05B17/00
Inventor 王学科马竞男穆童
Owner TIANJIN ENEW ENVIRONMENTAL PROTECTION ENGCO LTD
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