CN101705159A

CN101705159A - Cleaning agent

Info

Publication number: CN101705159A
Application number: CN200910233463A
Authority: CN
Inventors: 吴凡
Original assignee: HANGZHOU KENCHUANG ENVIRONMENT ENGINEERING TECHNOLOGY Co Ltd
Current assignee: COUNTRY JIANGSU CATALYST REGENERATION TECHNOLOGIES CO., LTD.
Priority date: 2009-10-30
Filing date: 2009-10-30
Publication date: 2010-05-12
Anticipated expiration: 2029-10-30
Also published as: CN101705159B

Abstract

The invention discloses a chemical cleaning agent for cleaning hardly solvable dirt containing sulfate, comprising the following components by weight percent: 5-50wt% of organic carboxylate, 0-2wt% of surfactant OP-10, 0-2wt% of penetration enhancer JFC, and the balance water. The invention has the beneficial effects that the cleaning agent can rapidly clean hardly solvable dirt containing sulfate at normal temperature, is easily decomposed in environment as the clean agent is neutral-alkali and nontoxic, thereby having no danger to environment, no progressive danger, and no special treatment on cleaning waste liquor, therefore, the chemical cleaning agent is environment-friendly cleaning agent.

Description

Clean-out system

Technical field

The present invention relates to a kind of chemical, be meant the chemical that is used to clean the indissoluble dirt that contains vitriol especially.

Background technology

Sulfates such as calcium sulfate, sal epsom material is the indissoluble material, and the dirt that contains vitriol extensively is present in industrial circle.Contain the recirculating cooling water system of sulfate ion water conditioner etc. as recirculating cooling water system, boiler feed water and the excessive use that contains more sulfate ion in the water source, all can produce the indissoluble dirt that contains calcium sulfate, sal epsom.For another example; adopt wet gypsum method (FGD device) to carry out the fuel-burning power plant that desulfurization exists flue gas heat exchange device (GGH), mist eliminator simultaneously again; on the heat-transfer surface of GGH and mist eliminator, assemble a large amount of calcium sulfate dirts through regular meeting; the existence of these dirts causes heat exchange efficiency to reduce greatly; increase energy consumption, the equipment operation is broken down.Because calcium sulfate, sal epsom generally with acid, alkali chemical reaction do not take place all, be difficult to this dirt be removed with the purging method of routine.Said traditional purging method is a kind of to be to utilize the soda boiling conversion method, and also having a kind of method is to clean with organic polymer complexing agent (such as EDTA) complexing at high temperature.When utilizing the soda boiling method for transformation to clean, more can cause corrosion that the burst porcelain phenomenon takes place to GGH and destroy the enamel anticorrosion layer based on the enamel heat exchange element; When utilizing organic polymer complexing agent to clean, because the raw material costliness, cleaning cost height causes and can not be widely used in medium-sized and small enterprises.Simultaneously, these two kinds of methods all be unable to do without heats, consuming time also longer, has limited to the application of actual field greatly.

Summary of the invention

The objective of the invention is to, provide a kind of can be to containing being difficult to resolve dirt and just removing rapidly at normal temperatures of vitriol, and can not cause the scavenger specially of corrosion harmfulness again to various matrixes.

For achieving the above object, the present invention adopts following technical scheme to realize:

A kind of clean-out system, its effect are the clean-out systems that is used to clean the indissoluble dirt that contains vitriol, comprise following component: the organic carboxylate that accounts for total content 5～50wt%; Account for the tensio-active agent OP-10 of total content 0～2wt%; Account for the penetration enhancer JFC of total content 0～2wt%; Surplus is a water;

Described organic carboxylate is selected for use: at least a in the sodium salt of oxalic acid, polyacrylic acid, lactic acid, oxyacetic acid, polymaleic acid or Epoxysuccinic acid, ammonia salt or the sylvite is preferably at least a in lactic acid, oxyacetic acid ammonia salt or the sylvite;

The pH value of described organic carboxylate is controlled in 7.5～12 scopes.

Beneficial effect of the present invention:

1, can realize cleaning at normal temperatures to the indissoluble dirt of sulfur-bearing hydrochlorate;

2, the indissoluble dirt that is rich in vitriol is had very strong cleansing power, the loose phenomenon of obvious volumetric expansion can promptly take place about 5 minutes, realize about 2 hours thoroughly cleaning up;

3, because clean-out system itself is neutral alkali and nontoxic partially, being easy to decompose in environment, therefore environment being safe from harm, also do not have cumulative bad harm, clean waste liquid and require no special processing, is a kind of environment-friendly cleaning agent;

If 4, in the cleaning process dirty thing has been expanded fluffing action, but should the expansion loose matter again by air-dry curing, can add an amount of water, then the medicament that remains in the cured article of infiltration still can restitution, it is loose that dirty thing is expanded, therefore the clear liquor after cleaning still has cleansing power, can recycle.

Embodiment

Below in conjunction with embodiment the present invention is done detailed description.

Embodiment 1

1, preparation lactic acid sylvite

A, with quantitative solid potassium hydroxide, slowly join in the deionized water, take cooling provision cooling simultaneously and constantly stir, until dissolving fully, make required potassium hydroxide solution;

B, quantitative lactic acid is joined in the potassium hydroxide solution that has prepared, take the cooling provision cooling simultaneously and constantly stir; When the lactic acid add-on reach whole lactic acid productions 80% the time, suspend to stir, allow it fully react; After 20 minutes, add lactic acid and continue stirring with the form that drips, stop after 30 minutes stirring, recording the pH value is 9, obtains required lactic acid sylvite.

2, clean vitriol indissoluble dirt

Getting 250ml concentration is that 35%PH is 9 lactic acid sylvite, and concentration is 0.01% tensio-active agent OP-10, and concentration is 0.2% penetration enhancer JFC, and surplus is a water, forms clean-out system; Prepare the gypsum lath that 30g contains calcium sulfate, half is dipped in below the clean-out system liquid level with gypsum lath, the very fast infiltration gypsum lath of clean-out system is in the following gypsum lath of liquid level and begins volumetric expansion, almost simultaneously after 5 minutes, the above gypsum lath of liquid level that is in of being soaked into also begins to swell, after 20 minutes, the gypsum lath volumetric expansion is mentioned the gypsum lath upper end to bigger more than 1/3rd than original volume, lower floor promptly breaks, loose caving in medicament.

Embodiment 2

1, preparation polymaleic acid ammonia salt and polyacrylic acid ammonia salt

A, get quantitative liquefied ammonia, in the stainless steel absorption tower, liquefied ammonia is slowly fed, by the spray mode liquefied ammonia is dissolved in the deionized water deionized water, make required ammonia solution;

B, quantitative polymaleic acid is joined in the ammonia solution that has prepared, take the cooling provision cooling simultaneously and constantly stir; When the polymaleic acid add-on reach whole polymaleic acid amounts 80% the time, suspend to stir, allow it fully react; After 20 minutes, add polymaleic acid and continue stirring with the form that drips, stop after 30 minutes stirring, recording the pH value is 9, obtains required polymaleic acid ammonia salt.

C, quantitative polyacrylic acid is joined in the ammonia solution that has prepared, take the cooling provision cooling simultaneously and constantly stir; When the polyacrylic acid add-on reach whole polyacrylic acid amounts 80% the time, suspend to stir, allow it fully react; After 20 minutes, add polyacrylic acid and continue stirring with the form that drips, stop after 30 minutes stirring, recording the pH value is 9, obtains required polyacrylic acid ammonia salt.

2, clean vitriol indissoluble dirt

Getting 250ml concentration is that 40%PH is 7.5 polymaleic acid ammonia salt and polyacrylic acid ammonia salt mixed solution; Concentration is 0.01% tensio-active agent OP-10, and concentration is 0.1% penetration enhancer JFC, and surplus is a water, forms clean-out system; Prepare the gypsum lath of 30g, half is dipped in below the clean-out system liquid level with gypsum lath, and the very fast infiltration gypsum lath of clean-out system is in the following gypsum lath of liquid level and begins volumetric expansion after 5 minutes, almost simultaneously, the above gypsum lath of liquid level that is in of being soaked into also begins to swell, and after 20 minutes, the gypsum lath volumetric expansion is to bigger more than 1/3rd than original volume, mention the gypsum lath upper end, lower floor promptly breaks, and caves in medicament, presents loose apperance.

Simultaneous test

Get the 30g gypsum lath difference traverse of three strips, be immersed in 250ml water fully, 250ml concentration is that 15% hydrochloric acid, 250ml concentration are 20% sodium hydroxide solution, observe after 6 hours, the plaster block no change, the proposition sth. made by twisting is pinched still very hard, proves that water, acid, alkali do not act on the cleaning of gypsum lath.

Embodiment 3

The 1-10 month 9 in October, 2009 is to the cleaning of generated energy of Tongchuan, Huaneng Group power plant #2 unit GGH that is 600MW:

Sampling detects to the dirt on this device enamel heat exchanger fin to be cleaned, wherein contains calcium sulfate 56.8%, sal epsom 6.1%, Calucium Silicate powder 7.3% and other compositions;

1, preparation oxyacetic acid sodium salt

A, with quantitative solid sodium hydroxide, slowly join in the deionized water, take cooling provision cooling simultaneously and constantly stir, until dissolving fully, make required sodium hydroxide solution;

B, quantitative oxyacetic acid is joined in the sodium hydroxide solution that has prepared, take the cooling provision cooling simultaneously and constantly stir; When the oxyacetic acid add-on reach whole oxyacetic acid amounts 80% the time, suspend to add, continue to stir, allow it fully react; After 20 minutes, add oxyacetic acid and continue stirring with the form that drips, stop after the continuous detecting pH value reaches 12,30 minutes stirring, recording the pH value is 12, obtains required oxyacetic acid sodium salt.

2, clean vitriol indissoluble dirt

Getting 250ml concentration is 35%, and the pH value is 12 oxyacetic acid sodium salt; Concentration is 0.01% tensio-active agent OP-10, concentration is 1% penetration enhancer JFC, and surplus is a water, forms clean-out system, take by weighing 15g dirt sample and put into clean-out system, after about 30 minutes, swell in dirty thing surface, and volumetric expansion is obvious after 2 hours, after 4 hours, peel off gently, the dirt nuclear of residue broad bean size, dirty thing all disperses to come off after 6 hours.

After having determined the sample cleaning performance, enter into actual cleaning engineering, also obtained excellent cleaning effect and reached every quality standard simultaneously.

The quality that the GGH of Tongchuan power plant reaches after cleaning:

1, clean that all heat accumulating elements of back are clean, no obvious residual rusty stain, dirty mark, clean no dead angle, show the heat accumulating element true qualities;

2, the heat accumulating element descaling rate reaches more than 95%;

Do not cause corrosion-damaged when 3, cleaning to GGH body and other GGH annexes;

4, cleaning reaches corresponding state quality standard: HG/T2387-2007 " industrial equipments matting quality standard ";

5, clean on-the-spot non-secondary pollution.

Claims

1. clean-out system, its effect is to be used to clean the clean-out system that contains the vitriol dirt, it is characterized in that, comprises following component: the organic carboxylate that accounts for total content 5～50wt%; Account for the tensio-active agent OP-10 of total content 0～2wt%; Account for the penetration enhancer JFC of total content 0～2wt%; Surplus is a water.

2. clean-out system as claimed in claim 1 is characterized in that, described organic carboxylate is selected for use: at least a in the sodium salt of oxalic acid, polyacrylic acid, lactic acid, oxyacetic acid, polymaleic acid or Epoxysuccinic acid, ammonia salt or the sylvite.

3. clean-out system as claimed in claim 1 is characterized in that, described organic carboxylate is selected at least a in lactic acid, oxyacetic acid ammonia salt or the sylvite for use.

4. as claim 1,2 or 3 described clean-out systems, it is characterized in that the pH value of described organic carboxylate is controlled in 7.5～12 scopes.