Method for preparing urea from coal chemical industry

A technology for coal chemical industry and urea, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as limitation, inability to discharge impurities in coal chemical wastewater, inability to pre-filter coal chemical wastewater, etc., to improve filtration efficiency Effect

Inactive Publication Date: 2018-12-28
石宏扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although this technical solution can adsorb and filter the coal chemical wastewater, it cannot discharge the impurities in the coal chemical wastewater, nor can it pre-filter the coal chemical wastewater, which makes the technical solution limited.

Method used

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  • Method for preparing urea from coal chemical industry
  • Method for preparing urea from coal chemical industry
  • Method for preparing urea from coal chemical industry

Examples

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Embodiment approach

[0044] As an embodiment of the present invention, the osmosis unit 22 includes an absorption plate 23, a liquid guide column 24, and an output plate 25; the surface of the No. 1 fixed plate 2 is provided with a No. 1 opening 26 passing through the No. 1 fixed plate 2 , which is used to slide with the guide column 24; the absorbing plate 23 is located on the upper surface of the No. 1 fixed plate 2, and the absorbing plate 23 is installed on the output plate 25 through the guide column 24; the output plate 25 is located on the Between the fixed plate 2 and the No. 2 filter plate 21; Springs are fixedly installed between the output plate 25 and the bottom surface of the No. 1 fixed plate 2; Flexible absorbent material; the absorbing plate 23 absorbs the water, and the books on the absorbing plate 23 permeate to the output plate 25 through the liquid guiding column 24; 26 sliding, at the same time, between the output plate 25 and No. 2 filter plate 21, it is used to deform the ou...

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Abstract

The invention belongs to the field of urea production, and in particular relates to a method for preparing urea from coal chemical industry. In a waste water purification device, a filter layer comprises a first filter plate and a circular baffle plate, the outer wall of an absorption tank is provided with a second slag discharging port and a filtering mesh hole, the circular baffle plate is provided with a first slag outlet, the first slag outlet is used for discharging sludge on the inner side of the circular baffle plate into the second slag discharging port, a permeation layer includes a first fixed plate, a second filter plate and a permeation unit, the permeation unit is used for absorbing water above the first fixed plate, the permeation unit is matched with the second filter plateto output the water in the permeation unit to be below the first filter plate, the permeation unit can adopt absorbent cotton, and the absorbent cotton can infiltrate the water above the first filterplate to be below the first filter plate, so that the permeation filtration of the water is achieved. The method for preparing urea from coal chemical industry is mainly used for purifying coal wastewater and can improve the coal waste water purification capability.

Description

technical field [0001] The invention belongs to the field of urea production, in particular to a method for preparing urea from coal chemical industry. Background technique [0002] Urea is a high-concentration nitrogen fertilizer, a neutral quick-acting fertilizer, and can also be used to produce a variety of compound fertilizers. No harmful substances remain in the soil, and long-term application has no adverse effects. Livestock can be used as feed for ruminants. [0003] However, during the production of urea in the coal chemical industry, a large amount of coal chemical wastewater will be produced. If it is not treated properly, it will have a significant impact on our lives. Coal chemical wastewater has the characteristics of complex composition, turbid smell, high concentration of organic matter and salt, strong alkalinity, and difficult biodegradation. In addition to dozens of inorganic substances such as ammonia nitrogen, thiocyanide, sulfide, and cyanide, coal c...

Claims

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Application Information

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IPC IPC(8): C07C273/04C02F9/02
CPCC02F1/001C02F1/281C02F1/44C02F9/00C02F2301/08C07C273/04Y02P20/141
Inventor 石宏扬
Owner 石宏扬
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