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Regenerant for sodium ion softening water treatment

A technology of regenerating agent and softening water, applied in complex/solubilizer treatment, etc., can solve the problems of condensate water pollution, unqualified condensate water, excessive iron content in condensate water, etc.

Active Publication Date: 2013-04-17
GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two reasons for the unqualified quality of condensed water. On the one hand, the demineralized water regenerated by a single sodium salt and the CO decomposed in the pot 2 After being brought into the condensate water system, it will cause acid corrosion to metal equipment and pipelines, and the iron content in the condensate water will exceed the standard; on the other hand, after the heat exchanger is corroded and leaked, the condensate water will be polluted by the heated medium, resulting in unqualified condensate water

Method used

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  • Regenerant for sodium ion softening water treatment
  • Regenerant for sodium ion softening water treatment
  • Regenerant for sodium ion softening water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Changes in water quality after softener regeneration

[0029] After ammonium chloride is added to the sodium chloride regenerant, the softener is regenerated with sodium chloride containing ammonium chloride after the softener fails. Part of the ion exchange resin is sodium type, and part is ammonium type. The following reactions occur when the raw water is softened:

[0030] (1) Exchange reaction of ammonium exchange resin

[0031] 2 RNH 4 + Ca Ng 2 Na ( HCO 3 ) 2 ...

Embodiment 2

[0052] Adopt regenerant regeneration softener described in the present invention, the NH that ammonium salt decomposes in pot 3 Bringing it into the steam can prevent CO from occurring in the metal of the steam equipment and the condensate system 2 Corrosion, greatly improve the quality of condensed water, ensure 100% qualified recovery of condensed water, and maximize the recovery and utilization of condensed water and heat energy.

[0053] The recycling rate of condensed water in industrial steam boilers can be increased to 92% by using the regenerant of the invention, 17.51 ​​million tons of standard coal can be saved every year, and 2.6 billion cubic meters of industrial water can be saved.

[0054] Economic Benefit Analysis

[0055] The value of condensate recovery is directly reflected in three parts: heat energy value, condensate pure quality value and pollution reduction value. Now analyze the recovery benefits of coal-fired boilers and oil-fired boilers as follows

...

Embodiment 3

[0073] By adopting the regeneration agent of the present invention, after the ammonium salt enters the pot, the alkalinity of the pot water can be effectively reduced, and excessive sewage discharge caused by the alkalinity exceeding the standard can be prevented.

[0074] economic benefits

[0075] The value of reducing boiler blowdown rate is directly reflected in reducing heat energy loss, reducing water consumption and reducing environmental pollution. Let’s take a common industrial boiler as an example to analyze the benefits of boiler sewage reduction. A 6T / H boiler with a rated pressure of 1.25Mpa adopts condensed water recovery and utilization. It is 3.0mmol / L. It adopts sodium salt treatment and adopts regeneration agent of the present invention to deal with separately, and its water quality is as follows respectively:

[0076]

[0077] From the above water quality analysis results, it can be drawn that the water quality treated by the regenerant of the present i...

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Abstract

The invention provides an improved regenerant for sodium ion softening water treatment. The regenerant has the advantage that: a certain amount of strong acid radical ammonium salt is added to a single sodium salt regenerant and an acid generated during ammonium salt decomposition can neutralize a base generated during sodium salt decomposition, thereby reducing the alkalinity of boiler water, preventing alkaline corrosion and caustic embrittlement and reducing excessive pollution discharge caused by excessive alkalinity; and NH3 generated during ammonium decomposition is carried in steam to neutralize CO2 in the steam, thus preventing the metal corrosion of steam equipment and a condensing water system and improving the recovery rate of condensing water. In the invention, a formula is provided to accurately calculate the proportions of the ammonium salts in the regenerants aiming at different water qualities, thereby optimizing the effects of the regenerant and reducing other adverseside effects. The regenerant provided by the invention can also contain a certain amount of complexing agent, thereby preventing the pollution of heavy metals on resin during the regeneration, improving the resin regeneration rate and reducing the specific consumption of the regenerant. The regenerant provided by the invention is simple to prepare, and is energy-saving, environmentally friendly, economical and practical.

Description

technical field [0001] The invention relates to the field of water softening and regeneration, in particular to a sodium ion softening water treatment regeneration agent. Background technique [0002] The prior art generally uses a single sodium salt (generally industrial salt sodium chloride) to soften and regenerate the feed water in the industrial boiler. Although the single sodium salt is cheap and has a good softening effect, it has several disadvantages: [0003] First, the salt in softened water is sodium salt, NaHCO 3 decomposed into Na in the pot 2 CO 3 , NaOH and CO 2 . Na 2 CO 3 The presence of NaOH and NaOH in the boiler water may cause alkaline corrosion of the boiler. When the relative alkalinity is greater than 0.2, the caustic embrittlement of the expansion joint and riveting boiler will occur, resulting in a boiler explosion accident. while CO 2 It is brought into the steam-consuming equipment and the condensed water system with the steam. Since the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F5/08
Inventor 杨麟陈志刚李茂东杜玉辉赵军明谢海垣
Owner GUANGZHOU SPECIAL PRESSURE EQUIP INSPECTION & RES INST
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