Condensed water treatment system

Abstract

The invention discloses a condensate water treatment system and method, which comprises the following parts: original water tank, at least one micro-filter, at least one fibre adsorption tank, pure water box, on-line water quality discriminating system, DCS total distributed control system, pipe and valve. The invention is characterized by the following: dealing when the condensation water dosen't reduce to the nomal temperature; dislodging oil, high valence metallic ion and particulate mass of condensation water and entering condensation water of the temperature>=85 deg.c; using semi-regenerated method to regenerate the system by the vapor of the temperature between 160 deg.c and 250 deg.c.

Description

technical field [0001] The present invention relates to a condensed water treatment system, in particular to a system for removing oil, high-valent metal ions and particles in the condensed water under the condition that the condensed water does not drop to normal temperature, and the present invention also relates to the condensed water treatment based on the system method. Background technique [0002] In order to make full use of energy and water resources, people pay more and more attention to the recycling of condensed water, and are widely used in many fields. However, usually condensed water contains oil, various high-valent metal ions and particles, etc., which need to be treated before use. [0003] The so-called oil in this article refers to hydrocarbons and their derivatives, which generally exist in four forms in water: free oil, mechanically dispersed oil, emulsified oil, and dissolved oil. The hazards of oil in condensed water are as follows: oil adheres to t...

AI Technical Summary

Problems solved by technology

When the boiler feed water contains metal ions such as iron and copper, it will cause the following hazards to the boiler and piping system: Iron scale and copper scale will form on the metal heating surface, causing local corrosion of the metal. This corrosion is generally pit corrosion, which is easy to Cause metal perforation or bursting; metal corrosion products are carried by steam to steam turbines and other follow-up steam equipment, resulting in salt accumulation in steam turbines and superheaters, seriously affecting safe and economical operation

Particles in condensed water may deposit in pipelines or equipment and cause blockage, which will lead to failure of pipelines or equipment and cause safety problems

[0004] The current condensate treatment technologies include: gravity degreasing, and there is a limit to the minimum diameter of oil droplets that can be separated by gravity settling. Therefore, for oil-water mixtures with small diameters and stable distribution in an emulsified state, gravity settling is powerless. This method Applicable to the situation where the oil content in water is large; activated carbon and coke degreasing, activated carbon has macropores, mesopores and micropores. Fiber degreasing, due to the operation under high pressure, the fiber aging is rapid, the life is short, and the high pressure operation is dangerous, there are safety hazards; fiber ball degreasing, because of its large pore size, so the filter is relatively rough, the oil content in the water after treatment is large, and Oil is needed for regeneration, which increases the difficulty of treatment; for oil removal by extraction, there is no regeneration system in this method for long-term operation, and the oil pollutes the resin to affect the adsorption effect; for iron removal by covering the filter, the filtration effect is unstable because the film cannot be guaranteed to be absolutely uniform. Moreover, the used resin cannot be regenerated and must be discarded, so the operating cost is high; the ion exchange resin method, the ion resin is not resistant to high temperature, the operation and regeneration are complicated, and the cost is high; the electromagnetic filter, the oil contained in the condensed water will adhere to the steel wool, etc. On the magnetic filler, it is difficult to remove, which affects the treatment effect, and is not resistant to high temperature, etc.

[0005] It can be seen from the above that the existing condensate treatment technology has problems such as poor effect, high temperature resistance, secondary pollution caused by cooling, potential safety hazards, high cost, and difficult operation and regeneration.

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