Sludge dewatering agent for diaphragm filter press

A membrane filter press and sludge dewatering technology, applied in water/sludge/sewage treatment, sludge treatment, biological sludge treatment, etc., can solve the problem of reducing the proportion of organic matter and calorific value of raw sludge and unfavorable sludge Problems such as composting, incineration, and increased equipment maintenance costs have been achieved to improve friendliness, high efficiency, and improved efficiency

Inactive Publication Date: 2018-12-25
东莞市凯威尔环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of using a large amount of inorganic salts are becoming more and more obvious. For example, the large amount of inorganic salts is not only cumbersome on-site dosing operation, but also the strong acid and strong alkali of inorganic salts will cause corrosion or fouling of filter press equipment and sludge transportation pipelines. Significantly increase the maintenance cost of the equipment; in addition, the use of inorganic salts will increase the inorganic ash content of the sludge, reduce the proportion of organic matter and calorific value of the original sludge, which is not conducive to the subsequent sludge composting, incineration and other processes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A membrane filter press sludge dewatering agent, comprising the following raw materials: 35 parts by weight of aluminum silicate, 7 parts by weight of aluminum sulfate, 13 parts by weight of sodium sulfate, 8 parts by weight of zeolite powder, 11 parts by weight of starch, and 70 parts by weight of polyamine.

[0021] The membrane filter press sludge dewatering agent of the present invention is prepared by stirring all raw materials under the temperature condition of 60° C. for 30 minutes.

[0022] Wherein, the particle size of the sodium sulfate is 142 μm.

[0023] Wherein, the particle size of the aluminum silicate is 89 μm.

Embodiment 2

[0025] The difference between this embodiment and embodiment 1 is:

[0026] The membrane filter press sludge dehydration agent also includes 2 parts by weight of nano-carbon spheres, and the nano-carbon spheres are made of microcrystalline cellulose placed in an inert gas atmosphere for high-temperature carbonization, and the high-temperature carbonization temperature is 1050°C , the particle size of the prepared carbon nanospheres is 22.4nm.

[0027] Wherein, the particle size of the sodium sulfate is 124 μm.

[0028] Wherein, the particle size of the aluminum silicate is 69 μm.

[0029] The membrane filter press sludge dewatering agent also includes 0.05 parts by weight of compound enzyme, which is obtained by mixing cellulase and protease at a weight ratio of 1:1.

[0030] The membrane filter press sludge dewatering agent of the present invention is prepared by stirring all raw materials except the compound enzyme at a temperature of 60° C. for 30 minutes, and then adding...

Embodiment 3

[0032] The difference between this embodiment and embodiment 2 is:

[0033] A membrane filter press sludge dehydration agent, comprising the following raw materials: 30 parts by weight of aluminum silicate, 5 parts by weight of aluminum sulfate, 10 parts by weight of sodium sulfate, 6 parts by weight of zeolite powder, 8 parts by weight of starch, 40 parts by weight of polyamine .

[0034] Wherein, the particle size of the sodium sulfate is 163 μm.

[0035] Wherein, the particle size of the aluminum silicate is 115 μm.

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Abstract

The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering agent for a diaphragm filter press. The agent comprises the following raw materials: 30-40 partsby weight of aluminum silicate, 5-9 parts by weight of aluminum sulfate, 10-16 parts by weight of sodium sulfate, 6-10 parts by weight of zeolite powder, 8-14 parts by weight of starch, 40-100 parts by weight of polyamine. According to the invention, the polyamine is used as a flocculant, so that the affinity between colloidal particles and water is weakened, the colloidal structure of sludge is destroyed, and the sludge is easier to dehydrate; and in addition, substances such as the aluminum silicate, the aluminum sulfate, the sodium sulfate and the like are simultaneously carried out throughelectrostatic attraction, van der Waals force attraction, ion exchange, chemical precipitation and the like, so that the dehydration effect of the sludge dehydrating agent is greatly improved, the water content of the sludge can be reduced to below 60%, the treatment efficiency is extremely high, malodor is eliminated, and the nontoxic and pollution-free sludge is beneficial to resource utilization.

Description

technical field [0001] The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering agent for a diaphragm filter press. Background technique [0002] With the improvement of domestic sewage and industrial sewage treatment rate, the output of sludge is increasing. Due to the extremely high water content of the sludge (up to 99.5%) and poor dehydration, the sludge volume is very large, which brings great difficulties to the subsequent sludge treatment and transportation procedures and greatly increases the treatment cost. Therefore, deep dehydration of sludge has become an important part of sludge treatment and disposal. At present, the most commonly used sludge dehydration method is to use inorganic salts (such as: ferric chloride + lime) to condition the sludge to improve the dehydration of the sludge, and then dehydrate the sludge through a filter press. However, the disadvantages of using a large amount of inorganic salts are bec...

Claims

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Application Information

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IPC IPC(8): C02F11/14C02F11/12C02F11/02C02F101/30
CPCC02F11/02C02F11/122C02F11/14C02F2101/30C02F2303/02C02F2303/06
Inventor 李高陈振永
Owner 东莞市凯威尔环保材料有限公司
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