Mechanical ventilation forced circulation evaporation device and liquid material evaporation method

A technology of forced circulation of evaporation and liquid materials, which is applied in the direction of evaporation, separation methods, chemical instruments and methods, etc., can solve the problems of poor operation stability of the device and high operation cost of industrial wastewater, and achieve the reduction of operation cost and the improvement of stable operation of the system. Solve the effect of high energy consumption

Inactive Publication Date: 2013-08-28
魏华
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] How to solve the problems of high operating cost of domestic industrial wastewater (or material concentration), poor device operation stability, and localization of all devices are key issues to be solved by this patent

Method used

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  • Mechanical ventilation forced circulation evaporation device and liquid material evaporation method
  • Mechanical ventilation forced circulation evaporation device and liquid material evaporation method

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Embodiment 1

[0028]A project produces 40 tons / hour of saline refractory wastewater per day (chemical oxygen demand 0.5-30%wt, inorganic salt 1.0-30.0%wt, oil content 0.01-1.2%wt), according to the "National Hazardous Waste Catalog", the wastewater belongs to Hazardous Waste. If it is treated as hazardous waste, its treatment cost is as high as 1.72-2.88 million per day, and the direct treatment cost of unit wastewater is 1800-3000 yuan per ton. In order to solve this problem, the project launched a set of three-effect evaporation and concentration equipment for wastewater. The daily treatment cost is 134,000 to 202,000 yuan / day (excluding waste disposal costs), and the direct treatment cost per unit of wastewater is 140 to 210 yuan / ton. However, shortly after the device was started, scaling, blockage of heating pipes, and flooding occurred in the device one after another. The quality of the effluent water fluctuated greatly, which caused a heavy burden on the subsequent biochemical system....

Embodiment 2

[0032] refer to figure 2 , The wastewater treatment scale is 4 tons / hour, and the water quality is characterized by chemical oxygen demand 0.2-1.0%wt, inorganic salt 1.0-8.0%wt, oil content 0-0.01%wt, ammonia nitrogen content 0.02-1.5%wt. The low-temperature heat source provided by the enterprise is ambient air (the average annual temperature of the ambient air in the current period is 28°C), and the internal circulation volume of the wastewater in the evaporation device is 160-250m 3 / h, the air-water ratio is 800-1200:1, with oblique staggered packing inside (the filling rate is 60%), and the design evaporation chamber temperature is 28±3℃. After being condensed, the tail gas of the device enters the waste water station for further treatment, and the non-condensable gas further enters the subsequent tail gas treatment system. The concentrated waste is in solid state (water content 40-50%), and is regularly transferred out of the evaporation system. Continuous and stable o...

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Abstract

The invention provides a mechanical ventilation forced circulation evaporation device and a liquid material evaporation method which are used for improving the operation reliability of an evaporation system and reducing the energy consumption and the operation cost. The mechanical ventilation forced circulation evaporation device comprises an evaporation container (10), a liquid material circulation system, a hot air conveying system and a tail gas collecting discharging system, wherein the evaporation container (10) is sealed, and a discharging pipe (11) is arranged at the bottom of the evaporation container (10); the initialing end and the terminal end of the liquid material circulation system are respectively positioned below and above a liquid level (A) inside the evaporation container (10); the terminal end of the air conveying system is communicated with a cavity of the evaporation container (10); and the initialing end of the tail gas collecting discharging system is communicated with a cavity above the liquid level (A) in the evaporation container (10).

Description

technical field [0001] The invention relates to a liquid material evaporation device and an evaporation method, which can be used for evaporation concentration of liquid material or treatment of industrial waste water. Background technique [0002] For refractory wastewater (B / C value lower than 0.3) and high-salt wastewater (salinity higher than 0.5%wt in terms of sodium chloride), the current main treatment technologies include evaporation, membrane treatment, and advanced oxidation. After the above-mentioned treatment, the wastewater (low-salt, biochemical) into the subsequent biochemical treatment. [0003] For evaporation technology, the current theoretical steam consumption of single-effect, double-effect, three-effect, and four-effect is about 1.10, 0.57, 0.40, and 0.30 tons of steam / ton of water, and the corresponding steam cost for ton of wastewater treatment is about 242 yuan, 125 yuan, 88 yuan Yuan, 66 yuan, if the actual operating costs such as circulating cooli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/16B01D1/00
Inventor 魏华
Owner 魏华
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