CN102126796A - Boiler water treatment composite medicament - Google Patents

Abstract

The invention provides a boiler water treatment composite medicament. The medicament comprises the following raw materials in percentage by weight: 10 to 20 percent of sodium tannate, 4 to 10 percent of sodium humate, 10 to 12.5 percent of sodium alginate, 5 percent of glycol derivative, 8.5 to 12 percent of lignin, 3.6 to 6 percent of starch, 1 to 2 percent of sodium hydroxide, 2 percent of sodium triphosphate and 39.5 to 51 percent of softened water. In the medicament, an organic chemical medicament is compounded with an inorganic chemical medicament; and when the medicament is used, aged scale deposits can be effectively removed, new scale deposits can be prevented from being formed, hard particles and other salts such as molysite, chloride, silicate and the like in a system can be removed, sludge can be adjusted to be easily removed through pollution discharge, and iron rust and corrosion in the system can be removed. By the medicament, a layer of metal protective film can be generated on the surface of metal equipment through a chemical reaction, the equipment and a pipeline can be effectively prevented from being corroded, the efficiency of a boiler can be improved, the service life of the boiler can be prolonged, the maintenance cost of the boiler can be reduced, and the effective operational time of the boiler can be ensured. The medicament can be used on line, so that the effects of energy conservation and emission reduction are achieved.

Description

A kind of boiler water processing compound

Technical field

The invention belongs to water treatment field, be specifically related to the boiler water processing compound.

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Background technology

Industrial Boiler and boiler for domestic inevitably problems such as incrustation scale, corrosion can occur through long-play.Because the generation of dirt makes the thermal conduction variation, so that boiler renders a service and reduces, so be difficult to reach the nominal steam output; And because the thermal conduction variation makes metal overheated, under the boiler pressure effect, boiler tube generation bulge, even blast.Therefore, after the gyp, should take necessary method scale removal.General way is by drop into the water-treating agent of boiler of some amount in boiler, with Ca in the pot water ²⁺, Mg ²⁺Or SiO ₂Material generation physics or chemical action etc. easy fouling form loose grain slag, discharge outside the boiler by blowdown, or make scale-forming ion become dissolved state to be present in the stove water, to reach the purpose that prevents or alleviate gyp.

At present, general water-treating agent of boiler mainly contains following several:

1, soda ash method: this method is mainly thrown in soda ash (Na in pot ₂CO ₃), and keep certain CO ₃ ^2-Concentration reduces the Ca in the pot water ²⁺, Mg ²⁺, still for the feedwater of complicated component, the effect of soda ash method is also unsatisfactory.

2, soda ash-tannin extract method: because the result of the common cooperation of soda ash and tannin extract is more effective with soda ash than single.

3, soda ash-sodium humate method: this method is more effective than soda ash-tannin extract method again, mainly is the water treatment effect cause more superior than tannin extract of sodium humate.

4, trisodium one glue method: trisodium one glue method refers to yellow soda ash, sodium hydroxide, tertiary sodium phosphate and tannin extract, and this method water treatment effect is more effective than soda ash-sodium humate method.

5, four sodium methods: four sodium methods refer to yellow soda ash, sodium hydroxide, tertiary sodium phosphate and sodium humate, and the treatment effect of this method is better than trisodium one glue method again, and various water quality are all had good adaptability.

6, organic poly-phosphate adds the soda ash method: this method is the water treatment agent that just grew up in recent years, and effect is all better than preceding several treatment processs.

Hydrolysis takes place in yellow soda ash easily, generate NaOH, and pot inner pressure is high more, Na ₂CO ₃Percent hydrolysis is big more, the OH in the pot water ^-Concentration is big more, causes corrosion of metal easily, and the embrittlement phenomenon takes place; Tertiary sodium phosphate is higher in water temperature, when basicity is big, the tricalcium phosphate of generation become mobile big, be easy to the aquation phosphorus lime sediment that blowdown is removed, on the contrary, if do not reach suitable pH value, calcium phosphate then becomes hard incrustation scale; Organic poly-phosphate, polyacrylic acid series scale inhibition, dispersion agent are medicaments the most frequently used in the Treatment of Industrial Water, because its stability better, facile hydrolysis unlike inorganic polyphosphate, often do not consider their drug effects in system in use, their drug effects in system have the certain hour scope in fact, if improper use, these medicaments can not be given full play to its due water conditioning effect, generate orthophosphoric acid salt after the poly-phosphate hydrolysis, this product can form deleterious Ca ₃(P0 ₄) ₂Precipitation suppresses its performance, has a strong impact on the control to system's corrosion and fouling.

Therefore, present medicament technology can only reduce fouling and corrosion rate, and can't eliminate the iron contamination in the feedwater, and through after a while, boiler still will be shut down cleaning.If boiler systems fouling or corrosion must be shut down, after employing chemistry and physics clean, can adding medicine control.

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Summary of the invention

At the deficiencies in the prior art, the purpose of this invention is to provide a kind of New-type boiler water treatment compound, this compound can be removed old dirt, prevent that new dirt from forming, hard particles in the removal system and other salts such as iron, chlorine, silicon etc., this medicament is used for steam boiler can also suppress foaming, priming, prevents that feedwater from entering steam.

The technical solution used in the present invention is as follows: a kind of boiler water processing compound, it is characterized in that, formulated by following raw materials by weight percent:

Weibull sodium: 10%～20%, sodium humate: 4%～10%, algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium: 10%～12.5%, glycol derivative: 5%, xylogen: 8.5%～12%, starch: 3.6%～6%, sodium hydroxide: 1%～2%, tertiary sodium phosphate: 2%, surplus is a softening water.

Further, described boiler water processing compound optimization proportioning is:

Weibull sodium: 20%, sodium humate: 5%, algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium: 12.5%, glycol derivative: 5%, xylogen: 8.5%, starch: 3.6%, sodium hydroxide: 1%, tertiary sodium phosphate: 2%, softening water: 42.4%.

Weibull sodium in the compound of the present invention can adsorb remnant oxygen in the stove, forms the tannate protective membrane, thereby avoids metal to be corroded; Effects such as sodium humate and algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium can decompose calcium, magnesium salts under alkaline condition, absorption, complexing, demineralized water, and prevention crystal growing, the grain slag viscosity that is generated is little, more liquid, easily get rid of with blowdown, have stronger osmosis, make loss of adhesion between old incrustation scale and metallic surface, thereby come off; Glycol derivative is adsorbable in steam steam bubble flow interface both sides, impels water to flow downward and causes the steam steam bubble to break, and effectively suppresses foaming and priming; Xylogen is a kind of unformed aromatics, and active extremely strong, lignin molecule has very strong penetrating power, and it can be penetrated in the hole of bird nest, and at high temperature molecular volume can expand tens of times, utilizes its physical properties that incrustation scale is peeled off from the metallic surface; Starch is neutral macromolecule organic, and very high molecular weight is arranged, the salt of temporary hardness, permanent hardness and the iron content in the energy planar water, chlorine, silicon etc., and formation has flowability, amorphous, noncohesive mud, is easy to get rid of; Sodium hydroxide and tertiary sodium phosphate mainly help out, and the pH value of keeping water is weakly alkaline, thereby help the reaction of organism particle, and the sodium hydroxide in the water and the content of tertiary sodium phosphate are very low, have significantly reduced the danger that caustic embrittlement takes place.

Compared to existing technology, the present invention has following beneficial effect:

1, the present invention adopts organic chemistry medicament and the compound use of inorganic chemistry medicament can effectively remove old dirt, prevent the formation of new dirt, hard particles in the removal system, and other salts such as iron, chlorine, silicon, or the like, regulating mud makes it to be easy to remove iron rust in the removal system and corrosion by blowdown.

2, medicament of the present invention can produce the layer of metal protective membrane by chemical reaction on the surface of hardware; effectively avoid equipment and Corrosion of Pipeline, improve the boiler effect, prolonged boiler work-ing life; reduce the boiler attendance maintenance cost, guarantee the operational use time of boiler.

3, medicament of the present invention can onlinely use, and under the effect of medicament, old dirt comes off, and stops new dirt to produce.After draining of boiler mouth connection by-passing filter device physical was removed old dirt, feedwater turned back to service pump, thereby reaches the effect of energy-saving and emission-reduction.

4, medicament of the present invention is used for steam boiler and can suppresses foaming, and priming prevents that feedwater from entering steam.

Embodiment

The invention will be further described below in conjunction with embodiment.

Embodiment 1:

In the 1000 gram boiler water processing compounds: Weibull sodium 200 grams (20%), sodium humate 50 grams (5%), algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium 125 grams (12.5%), glycol derivative 50 grams (5%), xylogen 85 grams (8.5%), starch 36 grams (3.6%), sodium hydroxide 10 grams (1%), tertiary sodium phosphate 20 grams (2%), softening water 424 grams (42.4%) mix by weight and form.

Embodiment 2:

In the 1000 gram boiler water processing compounds: Weibull sodium 150 grams (15%), sodium humate 100 grams (10%), algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium 150 grams (15%), glycol derivative 50 grams (5%), xylogen 100 grams (10%), starch 50 grams (5%), sodium hydroxide 10 grams (1%), tertiary sodium phosphate 20 grams (2%), softening water 395 grams (39.5%) mix by weight and form.

Embodiment 3

In the 1000 gram boiler water processing compounds: Weibull sodium 100 grams (10%), sodium humate 40 grams (4%), algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium 100 grams (10%), glycol derivative 50 grams (5%), xylogen 120 grams (12%), starch 60 grams (6%), sodium hydroxide 10 grams (1%), tertiary sodium phosphate 20 grams (2%), softening water 510 grams (51%) mix by weight and form.

On three 10T low pressure, 2.0 MPa steam boilers, make simultaneously with medicament after three months test-results as follows:

Embodiment	The ton steam boiler	Moisturizing per ton adds dose	Effect before using	Effect after the use
					Embodiment 1	10T	30 grams	The 1mm incrustation scale is arranged	Incrustation scale comes off fully, and water quality is limpid, and has protective membrane to form.Every index reaches and surpasses GB GB/T2008 requirement
Embodiment 2	10T	30 grams	The 1mm incrustation scale is arranged	Incrustation scale comes off substantially, the little apparent muddiness of water quality, and filtration starts ordinary.Every index reaches GB GB/T2008 requirement
					Embodiment 3	10T	30 grams	The 1mm incrustation scale is arranged	Incrustation scale comes off substantially, and fragmentary incrustation scale is arranged.Water quality is general.Every index reaches GB GB/T2008 requirement

Need to prove at last, above embodiment is only in order to illustrate technical scheme of the present invention but not the restriction technologies scheme, although the applicant has been described in detail the present invention with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, those are made amendment to technical scheme of the present invention or are equal to replacement, and do not break away from the aim and the scope of the technical program, all should be encompassed in the middle of the claim scope of the present invention.

Claims (2)

1. a boiler water processing compound is characterized in that, and is formulated by following raw materials by weight percent:

Weibull sodium: 10%～20%, sodium humate: 4%～10%, algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium: 10%～12.5%, glycol derivative: 5%, xylogen: 8.5%～12%, starch: 3.6%～6%, sodium hydroxide: 1%～2%, tertiary sodium phosphate: 2%, surplus is a softening water.

2. boiler water processing compound according to claim 1 is characterized in that, described proportioning is:

Weibull sodium: 20%, sodium humate: 5%, algae river flowing from Guizhou Province through Hunan into Dongting Lake acid sodium: 12.5%, glycol derivative: 5%, xylogen: 8.5%, starch: 3.6%, sodium hydroxide: 1%, tertiary sodium phosphate: 2%, softening water: 42.4%.