Inorganic conditioning based integrated sludge deep dehydration treatment process

A technology of deep dewatering and treatment process, applied in the direction of dewatering/drying/concentrating sludge treatment, etc., can solve the problems of sludge dewatering treatment effect and unsatisfactory cost, and achieve the goal of eliminating secondary pollution, clean production site and technical safety. Effect

Inactive Publication Date: 2014-01-01
孙阳 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The present invention aims at the deficiencies in the prior art, especially improves the dewatering equipment screw stacker and conditioner, provides an integrated sludge deep dehydration treatment process and key equipment based on inorganic conditioning and tempering, and solves the problems of the prior art The problem of unsatisfactory treatment effect and cost of medium sludge dewatering

Method used

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  • Inorganic conditioning based integrated sludge deep dehydration treatment process
  • Inorganic conditioning based integrated sludge deep dehydration treatment process
  • Inorganic conditioning based integrated sludge deep dehydration treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The technical scheme of the present invention comprises following processing steps:

[0047] Step 1, preliminary dehydration; the sludge with a water content of 99.7wt% in the sludge homogenization tank is transported to the mixing tank I 2 through the sludge delivery pump I 1, and at the same time, the compound conditioner is put into the mixing tank I through the dosing pump, and the sludge The ratio of parts by weight to the composite conditioner is: dry sludge: composite conditioner=100:5; the sludge and the composite conditioner are fully stirred and mixed by the mixer in the mixing tank I; the fully stirred and mixed sludge is transported Concentrate to the concentrating screw stacker 3; concentrate until the moisture content of the sludge is 93-95wt%.

[0048] Step 2, deep dehydration; the concentrated sludge is transported to the mixing tank II 5 through the sludge delivery pump II 4, and at the same time, the composite conditioner is put into the mixing tank II...

Embodiment 2

[0056] In the step 1, the moisture content of pretreated sludge is 99.0wt%; absolute dry sludge: composite conditioner=100:2;

[0057] In the described step 2, absolute dry sludge: composite conditioner=100:13;

[0058] In the described step 3, the acid in the acid tank is sulfuric acid.

[0059] The composite conditioner is prepared from the following raw materials in parts by weight, fly ash: quicklime: polyferrous sulfate / attapulgite = 70:10:2.

[0060] The structure of the pin screw stacking machine is that the length ratio of the pre-sequence section to the post-sequence section is, L front: L rear = 1:1; the inclination angle of the screw axis is 20 degrees from the horizontal plane; Set a pin 709 at 30 degrees for at least three weeks.

[0061] Other steps and structure are with embodiment 1.

Embodiment 3

[0063] In the described step 1, the moisture content of the pretreated sludge is 99.8wt%; absolute dry sludge: composite conditioner=100:6;

[0064] In the described step 2, absolute dry sludge: composite conditioner=100:5;

[0065] In the described step 3, the acid in the acid tank is acetic acid.

[0066] The composite conditioner is prepared from the following raw materials in parts by weight, fly ash: quicklime: polymerized ferrous sulfate / attapulgite = 90:20:10.

[0067] The structure of the pin screw stacking machine is that the length ratio of the pre-sequence section to the subsequent section is: L front: L rear = 3:1; the inclination angle of the screw axis is 10 degrees from the horizontal plane; the screw axis is at intervals of 18 degrees along the circumference. Set one pin 709 at least once for at least one week.

[0068] Other steps and structure are with embodiment 1.

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Abstract

The invention relates to an inorganic conditioning and pin screw machine based integrated sludge deep dehydration treatment process. The process comprises the steps such as primary dehydration, deep dehydration, dehydrated sludge delivery and the like; the moisture content in the sludge is reduced from 99.7% to less than 60% once in two stages by only adopting medication modifying and pin screw machine filter pressing ways instead of depending on any external conditions such as thermal energy and the like. In the whole operation process, no smoke, odor and noise are generated, no external thermal sources are needed, no secondary pollution is caused, the clean production can be realized, and more importantly, an operable approach is provided for waste sludge recycling, so that the process has very important significance in handling a large-area and large-quantity sludge treatment situation on both economic and social benefits.

Description

technical field [0001] The invention relates to a sludge dehydration treatment process and equipment, in particular to an integrated sludge deep dehydration treatment process based on inorganic tempering and pin screw stacking machines. technical background [0002] Sludge has a high moisture content, is perishable, has a foul smell, and contains heavy metals, "three-caused" organic pollutants and other toxic chemicals and pathogenic microorganisms. Random stacking will have a high risk of secondary pollution. my country's sludge treatment started relatively late, and the sewage treatment plants built in the early stage often simplified or even ignored the sludge treatment and disposal unit as much as possible. [0003] Simple landfilling of sludge can easily cause secondary pollution to land and groundwater. The sludge piled in the open air will be exposed to wind and rain, which will generate high temperature or other chemical reactions, which can kill soil microorganisms...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/12C02F11/14
Inventor 孙阳哈成勇
Owner 孙阳
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