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Full recycling treatment method of iron-containing municipal sludge

A technology of municipal sludge and treatment methods, applied in the direction of sludge treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of ineffective treatment and disposal of sludge and high energy consumption of processes, and achieve Achieve the effect of sludge resource utilization, simple process and large treatment capacity

Active Publication Date: 2021-08-31
清远绿由环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent CN106076256 A discloses the method of "pyrolytic carbonization-thermal reduction at 500-900°C" to produce nano-Fe(0)-porous sludge carbon materials, but due to the high energy consumption of the process, some sludge has not been obtained. Effective Disposal

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  • Full recycling treatment method of iron-containing municipal sludge
  • Full recycling treatment method of iron-containing municipal sludge
  • Full recycling treatment method of iron-containing municipal sludge

Examples

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Effect test

Embodiment 1

[0034] A kind of full-resource treatment method of iron-containing municipal sludge in this embodiment, its schematic flow chart is as follows figure 1 As shown, the following processing steps are included:

[0035] (1) Take an appropriate amount of dehydrated and dried sludge from a sewage plant (with a moisture content below 50%), and dehydrate it through a centrifugal separator.

[0036] (2) Mix 5 g of dehydrated sludge with 0.05 g of sodium chloride evenly, put it into a corundum ark, and place it in a pyrolysis furnace for 2 hours at 350° C. in a nitrogen atmosphere.

[0037] (3) Add 10.1 g of recycled water produced in step (1) dehydration to the pyrolyzed solid, stir evenly, let stand for 40 minutes, and separate layers.

[0038] (4) After the bottom layer residue is dried, a humic acid-containing product that can be used for land use can be used for agriculture, chlorination, grassland, soil improvement, soil restoration, mine restoration, etc.

[0039] (5) The Fe-N-...

Embodiment 2

[0043] A kind of full-resource treatment method of iron-containing municipal sludge in this embodiment, its schematic flow chart is as follows figure 1 As shown, the following processing steps are included:

[0044] (1) Take an appropriate amount of dehydrated and dried sludge from a sewage plant (with a moisture content below 50%), and dehydrate it through a centrifugal separator.

[0045] (2) Mix 5 g of dehydrated sludge with 0.5 g of sodium chloride evenly, put it into a corundum ark, and place it in a pyrolysis furnace for 2 hours at 350° C. under a nitrogen atmosphere.

[0046] (3) Add 11 g of recycled water produced in step (1) dehydration to the pyrolyzed solid, stir evenly, let stand for 40 minutes, and then separate layers.

[0047] (4) After the bottom layer residue is dried, a humic acid-containing product that can be used for land use can be used for agriculture, chlorination, grassland, soil improvement, soil restoration, mine restoration, etc.

[0048] (5) The ...

Embodiment 3

[0051] A kind of full-resource treatment method of iron-containing municipal sludge in this embodiment, its schematic flow chart is as follows figure 1 As shown, the following processing steps are included:

[0052] (1) Take an appropriate amount of dehydrated and dried sludge from a sewage plant (with a moisture content below 50%), and dehydrate it through a centrifugal separator.

[0053] (2) Mix 5 g of dehydrated sludge with 1.0 g of sodium chloride evenly, put it into a corundum ark, and place it in a pyrolysis furnace for 2 hours at 350° C. in a nitrogen atmosphere.

[0054] (3) Add 12 g of recycled water produced in step (1) dehydration to the pyrolyzed solid, stir evenly, let stand for 40 minutes, and then separate layers.

[0055] (4) After the bottom layer residue is dried, a humic acid-containing product that can be used for land use can be used for agriculture, chlorination, grassland, soil improvement, soil restoration, mine restoration, etc.

[0056] (5) The Fe-...

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Abstract

The invention belongs to the technical field of solid waste resourceful treatment, and discloses a full recycling treatment method of iron-containing municipal sludge. The treatment method comprises the following steps of: dehydrating the iron-containing municipal sludge, uniformly mixing the dehydrated iron-containing municipal sludge with a chlorinating agent, and then carrying out roasting pyrolysis treatment at 250-400 DEG C in an inert atmosphere; adding water into the solid material subjected to pyrolysis treatment for physical sedimentation, and separating and drying upper-layer suspended matters to obtain a Fe-N-C material; and drying the lower-layer residue to obtain a humic acid-containing product which can be used for land utilization. The treatment method disclosed by the invention is simple in process, low in cost, quick in effect taking and large in treatment capacity, and can realize comprehensive resource utilization of the municipal sludge.

Description

technical field [0001] The invention belongs to the technical field of solid waste resource treatment, and in particular relates to a full resource treatment method of iron-containing urban sludge. Background technique [0002] Chromium pollution in the soil of industrial waste land mainly comes from chromium industries, such as chromium salt production, metallurgy, electroplating, leather making, printing and dyeing, pharmaceuticals, textiles, pigments, etc. Chromium mainly exists in two valence states of Cr(III) and Cr(VI) in soil, among which Cr(VI) is one of the eight most harmful chemical substances to the human body, and is a typical high mobility and high toxicity Heavy metals have serious carcinogenic and mutagenic hazards. [0003] In recent years, chemical solidification technology has attracted extensive attention from researchers on the remediation of chromium-contaminated sites. It reacts with heavy metals by adding remediation agents, so that highly toxic and ...

Claims

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Application Information

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IPC IPC(8): C02F11/00C02F11/121C02F11/10C09K17/02C09K17/40
CPCC02F11/00C02F11/121C02F11/10C09K17/02C09K17/40C02F2303/06Y02W10/40
Inventor 宿新泰周含峰张丽娟袁晶华
Owner 清远绿由环保科技有限公司