A kind of dehydration and concentration method of industrial sludge

A technology for industrial sludge and sludge, applied in water/sludge/sewage treatment, sludge treatment, chemical instruments and methods, etc., can solve the problem of long drying time of sludge cake, short service life of filter cloth, and processing cycle time. Long and other problems, to achieve the effect of prolonging the filter press time, shortening the working cycle and improving the efficiency

Active Publication Date: 2021-09-21
HEBEI NINGFANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of long treatment cycle time, short service life of filter cloth and long natural drying time of sludge cake in the existing sludge treatment method

Method used

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  • A kind of dehydration and concentration method of industrial sludge
  • A kind of dehydration and concentration method of industrial sludge
  • A kind of dehydration and concentration method of industrial sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A dehydration of industrial sludge, including the following steps:

[0025] A, inject sludge and dehydration to 50M, respectively 3 In the first mixing tank of the volume, the addition of the dehydration agent is 100 L / 40m. 3 Sludge, pH 6, mixed temperature 25 ° C (can be used in winter, steam exposure can be heated), mixed time 25min;

[0026] B. After the first mixing tank is mixed by step A, the mixed product will be 0.45m. 3 / min flow rate self flows 30M 3 Volume second mixing can, add lime, lime added to 8kg / m 3 Sludge, control pH 8, a mixed time of 12 min, the mixing temperature is room temperature, the bottom of the can body in the second mixing can body communicates with a aeration pipe;

[0027] C. After the second mixing tank of step B is processed, the mixed product is 0.45m. 3 / min flow rate self flows 10M 3 The volume of the third mixing tank, anionic polyacrylamide having a mass concentration of 1 ‰, 1 ‰ of the sludge flowing out with respect to the thir...

Embodiment 2

[0030] A dehydration of industrial sludge, including the following steps:

[0031] A, inject sludge and dehydration to 50M, respectively 3 In the first mixing tank of the volume, the addition of the dehydration agent is 100 L / 40m. 3 Sludge, pH 6, mixed temperature 25 ° C, mixed time 20 min;

[0032] B, after mixing by the first mixing tank step A, the mixed product will be 0.35m. 3 / min flow rate self flows 30M 3 The volume of the second mixing can, replace the waste residue for the disulfurization of the power plant, the water content of the waste residue is 50%, and the addition is 20 kg / m. 3 Sludge, (the addition of waste residue ensures that the addition of lime reaches 9kg / m 3 Sludge, waste saga is adjusted in the total amount of calcium oxide and calcium carbonate, the content is high, the amount is less; the content is low, the amount of addition is more, which depends on the utilization rate of lime in desulfurization). The control pH 8.5 is controlled, the mixed ti...

Embodiment 3

[0036] A dehydration of industrial sludge, including the following steps:

[0037] A, inject sludge and dehydration to 50M, respectively 3 In the first mixing tank of the volume, the addition of the dehydration agent is 100 L / 40m. 3 Sludge, pH 5.5, mixed temperature 23 ° C, mixed time 23min;

[0038] B, after mixing by the first mixing tank step A, the mixed product is 0.4m. 3 / min flow rate self flows 30M 3 The volume of the second mixing tank, add lime, lime added is 10kg / m 3 Sludge, control pH 8.6, a mixed time of 15 min, and the mixing temperature is room temperature, and the bottom of the tank of the second mixing tank is connected to a aeration pipe;

[0039] C, after the second mixing tank of step B, the mixed product will be 0.4m. 3 / min flow rate self flows into 13M 3 The volume of the third mixing tank, adding a polyacrylamide having a mass concentration of 1 ‰, an amount of 1 ‰, the mixture is 28s, the mixing temperature is room temperature, the tank bottom of the...

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Abstract

A method for dehydrating and concentrating industrial sludge, which belongs to the technical field of sludge treatment. The sludge is treated by adding a dehydrating agent, followed by treatment in a first mixing tank, treatment in a second mixing tank, treatment in a third mixing tank, and pressure filtration. , the volume ratio of the first mixing tank, the second mixing tank and the third mixing tank is 1:0.6:(0.2-0.3), comprising the following steps: A, sludge and dewatering agent are injected into the first mixing tank respectively for Processing; B. After being mixed in the first mixing tank of step A, the mixed product flows into the second mixing tank, and lime is added for processing; C. After being processed in the second mixing tank of step B, the mixed product flows into the third mixing tank , adding polyacrylamide for treatment; D. After being treated in the third mixing tank in step C, the mixed product is pumped into a diaphragm filter press for treatment to obtain a sludge cake. This method can prolong the service life of the filter cloth of the filter press, shorten the working cycle to 1.5-2 hours, and the sludge cake can be completely dried after 2-3 days of natural drying.

Description

Technical field [0001] The present invention belongs to the technical field of sludge treatment, and the treatment of sludge dehydration concentration, specifically, a dehydration concentration method of industrial sludge. This processing method, the filter machine filter can be extended to January, and the entire system work cycle is shortened to 1.5-2 hours (ie, from the first mixing can to the filter cake, the process work cycle is shortened to 1.5-2 hours. ), The efficiency is significantly improved, and the sludge cake can dry 2-3 days. Background technique [0002] Sludge treatment is the process of stabilization, reduction and harmlessness, and existing industrial sludge treatments, the liquid moisture of adsorbing in which "cationic amide" is added to make sludge dry, utilized The strong water absorption of cationic amide, but the separation of the sludge follow-up is not very thorough, and the sludge will be sandcase, and therefore, 1, the natural drying takes about 1 we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/122C02F11/148
CPCC02F11/122C02F11/14
Inventor 刘瑞宁孙红娟张立云郭秀娟曹军平
Owner HEBEI NINGFANG GRP
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