Gas cycling evaporation method and device

A gas circulation and evaporation device technology, applied in the direction of evaporation, separation methods, chemical instruments and methods, etc., can solve the problems of high moisture content of solid materials at the bottom of the evaporation chamber, failure to consider low-temperature waste heat utilization, system thermal efficiency and stability decline, etc. , to achieve the effects of saving evaporation energy consumption, realizing waste reduction, and reducing the amount of boiling point substances

Inactive Publication Date: 2014-10-01
魏华
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Problems solved by technology

However, the air-conditioning heat pump system and the inlet water preheating system exchange heat through the forced circulation of waste water (liquid). As the evaporation process progresses, the mass concentration of organic matter and calcium and magnesium ions in the waste water (liquid) gradually increases, causing the heat exchanger to be easily damaged. Fouling and clogging, the thermal efficiency and stability of the system are greatly reduced
Since the heat exchange adopts the liquid-liquid method, the temperature of the gas participating in the cycle is low, the mass transfer efficiency is low, and the moisture content of the solid material at the bottom of the evaporation chamber is high
At the same time, the patent scheme does not consider the problem of low-temperature waste heat utilization

Method used

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Embodiment 2

[0039] A fine chemical sewage biochemical treatment sludge daily output is about 20 tons / day (moisture content is about 99%). Since biochemical sludge is a national hazardous waste, it needs to be dehydrated by the enterprise and sent to the incineration station for treatment. Considering that the dehydrated biochemical sludge is refractory and toxic (biochemical sludge absorbs highly active organic compounds), and further considering that the moisture content of the sludge sent to the incineration station is highly related to the incineration cost, the technical solution of this application was finally selected (1 first evaporator unit, 2 first condenser units, 1 second condenser unit, 2 second evaporator units, 1 compressor unit) are dehydrated and sent to the incineration plant for treatment. The circulating gas adopts ambient air, the external heat medium adopts the quenching water of the incineration station (the temperature is about 60-70°C, and the flue gas is quenched ...

Embodiment 3

[0041] After a chemical product is extracted by ethanol, ethanol and products need to be separated, and the production amount is about 40 tons per day. A common measure is vacuum distillation, and the treatment cost is about 180 yuan / ton of alcohol. Adopt the technical scheme of the present application (1 first evaporator unit, 4 first condenser units, 1 second condenser unit, 2 second evaporator units, 2 compressor units), the circulating gas is nitrogen (The purpose is explosion-proof), the external source heat medium is steam condensed water in the factory area (40~50°C), the internal source heat medium temperature is -15~-5°C, and the temperature of the circulating gas is cooled from 45±2°C in the first condenser unit to -10±2°C. In the second condenser unit, the temperature is raised from -10±2°C to 68±2°C, and the final separation cost is 53Kwh / ton of ethanol. After the ethanol is subsequently dehydrated to within 500ppm, it continues to be recycled, and the ethanol con...

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Abstract

The invention discloses a gas cycling evaporation method and device, and aims to reduce evaporation energy consumption effectively and improve the stability and reliability of the operation of an evaporation system. The device comprises a first evaporator, a first condenser, a second evaporator and a second condenser, wherein the first evaporation is connected with a fluid material feeding pipeline and a high-boiling-point discharging pipeline; the first condenser is connected with a low-boiling-point discharging pipeline; a boosting and warming pipeline as well as a compression circulating medium pipeline are connected between the second evaporator and the second condenser; the second evaporator is connected with an external heat source medium input pipeline and an external heat source medium output pipeline; the circulating medium pipeline is connected with the first evaporator, the first condenser, the second condenser and the first evaporator in sequence and forms a loop; an internal heat source medium circuit is connected with the second evaporator and the first condenser.

Description

technical field [0001] The invention relates to a method and device for evaporating fluid materials. Background technique [0002] For evaporation technology, the theoretical steam consumption of traditional single-effect, double-effect, three-effect, and four-effect is about 1.10, 0.57, 0.40, 0.30 tons of steam / ton of water, and the corresponding steam cost of ton of water treatment is about 242 yuan, 125 yuan, 88 yuan Yuan, 66 Yuan (according to commercial steam cost 220 Yuan / ton of steam). Considering the problems of circulating cooling water, circulating motor consumption, and evaporator fouling, the actual energy consumption and operating costs of the above-mentioned evaporation technologies far exceed the above-mentioned theoretical levels. In order to solve the problem of high energy consumption of evaporation technology, patents on evaporation technology have been increasing in recent years. At present, the development of evaporation technology is mainly carried ou...

Claims

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Application Information

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