Coal washing wastewater composite coagulant and preparation method thereof
The technology of coagulant and polymer flocculant is applied in the field of composite coagulant for coal washing wastewater and its preparation, which can solve the problems of difficult treatment and easy pollution of coal washing wastewater, and achieves the effect of being easily popularized and used.
Active Publication Date: 2015-06-17
SHANGHAI EMPEROR OF CLEANING HI TECH
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a composite coagulant for coal washing wastewater and its preparation method in order to overcome the defects of difficult treatment and easy pollution of existing coal washing wastewater
Method used
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Embodiment 1
[0025] Preparation of coagulant: mix 9g sodium dodecylbenzenesulfonate, 40g magnesium sulfate, 25g aluminum chloride, 20g sodium silicate, 1g cerium sulfate, 5g anionic polyacrylamide (number average molecular weight is 13 million, ion degree 15%), dissolved in 1L of water, is the coagulant solution.
Embodiment 2
[0027] Preparation of coagulant: 8g sodium dodecylbenzenesulfonate, 35g magnesium sulfate, 20g aluminum chloride, 25g potassium silicate, 1g cerium sulfate, 1g praseodymium sulfate, 5g anionic polyacrylamide (the number average molecular weight is 1300 Wan, ionicity is 15%), dissolved in 1L of water, is the coagulant solution.
Embodiment 3
[0029] Preparation of coagulant: 13.5g sodium dodecylbenzene sulfonate, 35g magnesium sulfate, 20g aluminum chloride, 20g sodium silicate, 1.5g cerium sulfate, 5g anionic polyacrylamide (the number average molecular weight is 13 million, Ionicity is 15%), dissolved in 1L of water, is the coagulant solution.
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Abstract
The invention discloses a coal washing wastewater composite coagulant and a preparation method thereof. The composite coagulant comprises the following components by mass: 5-30% of alkylbenzene sulfonate, 25-55% of a magnesium salt, 10-40% of an aluminum salt, 5-35% of silicate, 0.1-4% of a rare earth element salt and 3-15% of a high polymer flocculant. The coagulant provided by the invention does not contain heavy metals, organic toxic substances and oher substances harmful to the environment and human body, is friendly to the environment, and can be used for treatment of various coal washing wastewater. The salts involved in the invention have no pollution to the environment and are all easily available. Thus, the coal washing wastewater composite coagulant is easy for promotion and application.
Description
technical field [0001] The invention relates to a composite coagulant for coal washing wastewater and a preparation method thereof. Background technique [0002] Coal washing wastewater exists in various processes of coal washing, coal preparation, and coal use, such as coal washing water for wet coal washing in coal mines, coal slime water in coal preparation plants, and flushing water in coal units. These wastewaters are mixtures of water and fine coal powder , its main characteristics are high turbidity, fine solid particle size, and many negative charges on the surface of solid particles. The repulsion and Brownian force between the same charges keep these particles dispersed in water; (Such as adsorption, dissolution, compounding, etc.), the properties of coal washing wastewater are quite complicated. Coal washing wastewater not only has the properties of suspension, but also has the properties of colloid. Due to the above reasons, it is difficult to clarify coal washi...
Claims
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IPC IPC(8): C02F1/52C02F1/54C02F1/56
Inventor 王炜
Owner SHANGHAI EMPEROR OF CLEANING HI TECH