CN108996717A - A kind of pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water - Google Patents
A kind of pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water Download PDFInfo
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- CN108996717A CN108996717A CN201810975694.9A CN201810975694A CN108996717A CN 108996717 A CN108996717 A CN 108996717A CN 201810975694 A CN201810975694 A CN 201810975694A CN 108996717 A CN108996717 A CN 108996717A
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- water
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- descaling agent
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
- C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
- C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
- C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
Abstract
The present invention relates to Industrial Boiler make up water treatment fields, and in particular to a kind of pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water.The pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, it is characterized in that, being prepared by the raw material comprising following weight percent: tertiary sodium phosphate 1.5 ~ 4.5%, sodium sulfite 3 ~ 7%, organic phosphine corrosion inhibiting and descaling agent 0.5 ~ 2.5%, sodium carbonate 2 ~ 5%, water 81 ~ 93%.The pure water that the present invention is prepared does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, can significantly reduce the inner wall of boiler and the corrosion rate of water supply inside pipe wall and have good corrosion inhibition rate and scale inhibition performance；The risk of boiler perforation is effectively reduced, reduces the risk for stopping factory, prolonged boiler service life reduces the cost of maintenance of equipment.
Description
Technical field
The present invention relates to Industrial Boiler make up water treatment fields, and in particular to a kind of pure water makees the low-pressure industrial pot of make-up water
Furnace corrosion inhibiting and descaling agent.
Background technique
25MPa(25 atmospheric pressure) hereinafter, temperature is generally saturated-steam temperature.The annual output of industrial boilers in China is basic
On maintain 7 ~ 100,000 steaming tons levels, installation total amount about 55.33 ten thousand, 190.61 ten thousand steam tons, 125.40 ten thousand MW, close to power station
2 times of boiler installed capacity, China have become the country for producing in the world and using Industrial Boiler most.The improper possibility of water process
Boiler corrosion, fouling and priming are caused, the normal operation of boiler is influenced.Fouling directly affects heat transfer and carbonated drink is normally followed
Ring gently then causes underdeposit corrosion, waste of fuel and shortens boiler life, heavy then cause tube expansion, deformation or pipe explosion accident.Corrosion is straight
The influence strength of materials is connect, gently then shortens boiler life, it is heavy then cause crackle, leakage even explosion accident.The direct shadow of priming
Quality of steam is rung, may cause superheater and other gas utilization unit foulings or even causes safety accident.Many industry domestic at present
The water supply reverse osmosis membrane of boiler, ion exchange resin get over Boiler water Feeding System as the case where boiler water-filling at pure water
Come more, uses pure water as boiler feedwater, can be reduced the blowdown of boiler, it is energy saving, fouling is reduced, but will lead in boiler
Wall erosion tendency increased.
Summary of the invention
Technical problem to be solved by the present invention lies in provide the low-pressure industrial boiler inhibition resistance that a kind of pure water does make-up water
Dirty agent.Low-pressure industrial boiler corrosion inhibiting and descaling agent that the pure water does make-up water can significantly reduce the inner wall and water supply inside pipe wall of boiler
Corrosion rate simultaneously has good corrosion inhibition rate and scale inhibition performance.
Above-mentioned technical problem to be solved by this invention, is achieved by following technical solution:
It is prepared by the raw material comprising following weight percent: tertiary sodium phosphate 1.5 ~ 4.5%, sodium sulfite 3 ~ 7%, organic phosphine
Class corrosion inhibiting and descaling agent 0.5 ~ 2.5%, sodium carbonate 2 ~ 5%, water 81 ~ 93%.
As a preferred embodiment, the pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, by
Raw material comprising following weight percent is prepared: tertiary sodium phosphate 2 ~ 4%, sodium sulfite 4.5 ~ 6.5%, organic phosphine inhibition
Antisludging agent 1 ~ 2%, sodium carbonate 2.5 ~ 4.5%, water 91 ~ 93%.
As a kind of optimal case, the pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, by comprising such as
The raw material of lower weight percent is prepared: tertiary sodium phosphate 3%, sodium sulfite 5.5%, organic phosphine corrosion inhibiting and descaling agent 1.5%,
Sodium carbonate 3.5%, water 86.5%.
As a preferred embodiment, the pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, and described has
Machine phosphine corrosion inhibiting and descaling agent is ethylene diamine tetra methylene phosphonic acid or 1-hydroxy ethylidene-1,1-diphosphonic acid or aminotrimethylenephosphonic acid or three second
Six methylenephosphonic acid of alkene tetramine.
As a preferred embodiment, the pure water does the preparation side of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Method comprises the following steps:
Tertiary sodium phosphate, sodium carbonate, organic phosphine corrosion inhibiting and descaling agent, sodium sulfite is successively added into water under stirring, stirs
It mixes uniformly, corrosion inhibiting and descaling agent is made.
As a preferred embodiment, the addition sodium carbonate condition is that material has been completely dissolved.
As a preferred embodiment, the four methylenephosphonic acid condition of addition is that material has been completely dissolved.
As a preferred embodiment, the pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, and described is slow
Erosion antisludging agent adds concentration by for 50~100g/T.
As a preferred embodiment, the pure water does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, and described is slow
It loses antisludging agent and is suitable for operating pressure in 20KG or less, evaporation capacity in 25T/h boiler below.
The utility model has the advantages that the pure water that the present invention is prepared does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water, using spy
The raw material for determining constituent content is prepared；The inner wall of boiler and the corrosion rate of water supply inside pipe wall can be significantly reduced and had very
Good corrosion inhibition rate and scale inhibition performance；The risk of boiler perforation is effectively reduced, reduces the risk for stopping factory, prolonged boiler service life subtracts
The cost of maintenance of equipment is lacked.
Specific embodiment
It is explained further the present invention with reference to embodiments, but embodiment do not do any form to the present invention and limit.
1 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 3%, sodium sulfite 5.5%, ethylene diamine tetra methylene phosphonic acid 1.5%, sodium carbonate 3.5%, water
86.5%。
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
2 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 2%, sodium sulfite 7%, ethylene diamine tetra methylene phosphonic acid 2.5%, sodium carbonate 5%, water 83.5%.
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
3 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 1.5%, sodium sulfite 3%, ethylene diamine tetra methylene phosphonic acid 1%, sodium carbonate 2%, water 91.5%.
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
4 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 4.5%, sodium sulfite 7%, ethylene diamine tetra methylene phosphonic acid 2.5%, sodium carbonate 5%, water 81%.
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
5 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 1.5%, sodium sulfite 5%, ethylene diamine tetra methylene phosphonic acid 1.5%, sodium carbonate 3%, water 89%.
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
6 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 3.5%, sodium sulfite 3.5%, ethylene diamine tetra methylene phosphonic acid 2.5%, sodium carbonate 3.5%, water
87%。
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
7 pure water of embodiment does the preparation of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water
Composition of raw materials: tertiary sodium phosphate 4%, sodium sulfite 5.5%, ethylene diamine tetra methylene phosphonic acid 1%, sodium carbonate 1.5%, water 88%.
Preparation method:
Tertiary sodium phosphate, sodium carbonate, ethylene diamine tetra methylene phosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
Embodiment 8
Composition of raw materials: tertiary sodium phosphate 3%, sodium sulfite 5.5%, 1-hydroxy ethylidene-1,1-diphosphonic acid 1.5%, sodium carbonate 3.5%, water
86.5%。
Preparation method:
Tertiary sodium phosphate, sodium carbonate, 1-hydroxy ethylidene-1,1-diphosphonic acid, sodium sulfite is successively added into water under stirring, stirring is equal
It is even, corrosion inhibiting and descaling agent is made.
Embodiment 9
Composition of raw materials: tertiary sodium phosphate 3%, sodium sulfite 5.5%, aminotrimethylenephosphonic acid 1.5%, sodium carbonate 3.5%, water
86.5%。
Preparation method:
Tertiary sodium phosphate, sodium carbonate, aminotrimethylenephosphonic acid, sodium sulfite, stirring is successively added into water under stirring
Uniformly, corrosion inhibiting and descaling agent is made.
Embodiment 10
Composition of raw materials: tertiary sodium phosphate 3%, sodium sulfite 5.5%, Triethylene-tetramine Hexmethanephonic Acid 1.5%, sodium carbonate 3.5%, water
86.5%。
Preparation method:
Tertiary sodium phosphate, sodium carbonate, Triethylene-tetramine Hexmethanephonic Acid, sodium sulfite is successively added into water under stirring,
It stirs evenly, corrosion inhibiting and descaling agent is made.
Below specifically to illustrate that pure water of the invention does the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water with embodiment
Inhibition and scale inhibition effect.
It, will be of the invention real referring to GB/T 18175-2000 standard " the measurement rotary hanging plate method of water treatment agent corrosion inhibition "
It applies the corrosion inhibiting and descaling agent that corrosion inhibiting and descaling agent, blank sample and the embodiment 8 ~ 10 that example 1 ~ 7 obtains obtain and carries out rotary hanging plate corrosion
Test；It, will be of the invention and referring to GB/T 16632-2008 standard " the test tosca methods of water treatment agent scale-inhibiting properties "
The corrosion inhibiting and descaling agent that corrosion inhibiting and descaling agent, blank sample and the embodiment 8 ~ 10 that embodiment 1 ~ 7 obtains obtain carries out resistance calcium carbonate scale
Test.
Corrosion inhibition rate can be calculated as follows:
I(%)=100% × (R0-Rt)/R0
In formula, I is corrosion inhibition rate；R0For the corrosion rate (mm/a) for not adding corrosion inhibiting and descaling agent test specimen；RtTo add corrosion inhibiting and descaling agent
The corrosion rate (mm/a) of test specimen；
Rate of metal corrosion: the numerical value of metal erosion effect in the unit time can be calculated as follows,
Corrosion rate: F=C × Δ W/A × t × ρ
In formula, C is design factor；A is the corroded area (cm of test specimen2)；T is the etching time (h) of test specimen；ρ is material for test
Density (kg/m3)
Scale inhibition performance is the scale inhibition effect of corrosion inhibiting and descaling agent, can be calculated as follows,
In formula,It is surveyed before being tested for test solutionMass concentration is multiplied by theory obtained by cycles of concentrationMatter
It measures concentration (mg/L)；For the test solution for adding antisludging agent, after testMass concentration (mg/L)；To be not added
The test (blank) of antisludging agent is under same test conditionsMass concentration (mg/L).
The corrosion and scale inhibition performance of corrosion inhibiting and descaling agent is tested:
Test water quality:
| Calcium is hard (mg/L) | Basicity (mg/L) | C(Cl-) (mg/L) | pH | C(SO42-) (mg/L) | Corrosion inhibiting and descaling agent concentration (mg/L) |
| 132.2 | 25.7 | 250.2 | 6.2 | 200.7 | 15 |
Water temperature control is tested at 50 ± 1 DEG C, 75 revs/min of lacing film revolving speed, continuously runs 72h, the pure water that embodiment 1 ~ 7 obtains is mended
The 20 of the corrosion inhibiting and descaling agent that low-pressure industrial boiler corrosion inhibiting and descaling agent, blank sample and the embodiment 8 ~ 10 of water supply obtain#Carbon steel examination
The corrosion rate of piece, corrosion inhibition rate.80 DEG C of water of test are concentrated 2 times, and what embodiment 1 ~ 7 obtained follows the low-pressure industrial that pure water does make-up water
The corrosion inhibiting and descaling agent that boiler corrosion inhibiting and descaling agent, embodiment 8 ~ 10 obtain carries out resistance calcium carbonate scale test.
1 corrosion-mitigation scale-inhibition test result of table
| Medicament title | Dosage (mg/L) | Corrosion rate (mm/a) | Corrosion inhibition rate (%) | Scale inhibition performance (%) |
| Blank control A | 0 | 1.708 | ||
| Embodiment 1 | 60 | 0.006 | 99.8 | 97.5 |
| Embodiment 2 | 60 | 0.008 | 99.5 | 85.3 |
| Embodiment 3 | 60 | 0.011 | 99.3 | 88.9 |
| Embodiment 4 | 60 | 0.012 | 98.2 | 83.8 |
| Embodiment 5 | 60 | 0.022 | 98.7 | 84.6 |
| Embodiment 6 | 60 | 0.023 | 98.6 | 80.1 |
| Embodiment 7 | 60 | 0.014 | 99.1 | 74.6 |
| Embodiment 8 | 60 | 0.074 | 95.6 | 42.3 |
| Embodiment 9 | 60 | 0.073 | 95.8 | 55.7 |
| Embodiment 10 | 60 | 0.074 | 95.6 | 58.1 |
As can be seen from Table 1, the pure water as made from embodiment 1 ~ 7 does the low-pressure industrial boiler corrosion inhibiting and descaling agent pair of make-up water
The corrosion rate of lacing film is inhibited to meet " National Standard of the People's Republic of China's Code for design of industrial recirculating cooling water treatment " GB/
In T50050-2007, industrial circulating water design specification requirement of the corrosion of carbon steel rate less than 0.075 mm/a, and embodiment 8 ~ 10
Corrosion inhibiting and descaling agent obtained is not met but, and the obtained low-pressure industrial boiler corrosion inhibiting and descaling agent of the present invention is in corrosion rate, slow
Corrosion inhibiting and descaling agent made from embodiment 8 ~ 10 is superior in terms of erosion rate, scale inhibition performance, it is seen that organic phosphine corrosion inhibiting and descaling agent selects second
Effect is best when four methylenephosphonic acid of diamines.When the present invention can effectively solve pure water as industrial boiler water-supply, spot corrosion is serious to be asked
Topic reduces the risk of boiler perforation, reduces the risk for stopping factory, and prolonged boiler service life reduces the cost of maintenance of equipment.
Claims (9)
1. the low-pressure industrial boiler corrosion inhibiting and descaling agent that a kind of pure water does make-up water, which is characterized in that by including following weight percent
The raw material of ratio is prepared: tertiary sodium phosphate 1.5 ~ 4.5%, sodium sulfite 3 ~ 7%, organic phosphine corrosion inhibiting and descaling agent 0.5 ~ 2.5%,
Sodium carbonate 2 ~ 5%, water 81 ~ 93%.
2. the low-pressure industrial boiler corrosion inhibiting and descaling agent that pure water according to claim 1 does make-up water, which is characterized in that by wrapping
Raw material containing following weight percent is prepared: tertiary sodium phosphate 2 ~ 4%, sodium sulfite 4.5 ~ 6.5%, organic phosphine inhibition resistance
Dirty agent 1 ~ 2%, sodium carbonate 2.5 ~ 4.5%, water 91 ~ 93%.
3. the low-pressure industrial boiler corrosion inhibiting and descaling agent that pure water according to claim 1 does make-up water, which is characterized in that by wrapping
Raw material containing following weight percent is prepared: tertiary sodium phosphate 3%, sodium sulfite 5.5%, organic phosphine corrosion inhibiting and descaling agent
1.5%, sodium carbonate 3.5%, water 86.5%.
4. the low-pressure industrial boiler corrosion inhibiting and descaling agent that pure water according to claim 1 does make-up water, which is characterized in that described
Organic phosphine corrosion inhibiting and descaling agent be ethylene diamine tetra methylene phosphonic acid or 1-hydroxy ethylidene-1,1-diphosphonic acid or aminotrimethylenephosphonic acid or
Triethylene-tetramine Hexmethanephonic Acid.
5. the described in any item pure water of claim 1 ~ 4 do the preparation method of the low-pressure industrial boiler corrosion inhibiting and descaling agent of make-up water,
It is characterized in that, comprising the following steps:
Tertiary sodium phosphate, sodium carbonate, organic phosphine corrosion inhibiting and descaling agent, sodium sulfite is successively added into water under stirring, stirs
It mixes uniformly, corrosion inhibiting and descaling agent is made.
6. preparation method according to claim 6, which is characterized in that the addition sodium carbonate condition is that material is complete
Dissolution.
7. preparation method according to claim 6, which is characterized in that the four methylenephosphonic acid condition of addition be material
It is completely dissolved.
8. the low-pressure industrial boiler corrosion inhibiting and descaling agent that pure water described according to claim 1 ~ 7 does make-up water, which is characterized in that institute
The corrosion inhibiting and descaling agent stated adds concentration by for 50~100g/T.
9. the low-pressure industrial boiler corrosion inhibiting and descaling agent that pure water described according to claim 1 ~ 7 does make-up water, which is characterized in that institute
The corrosion inhibiting and descaling agent stated is suitable for operating pressure in 20KG or less, evaporation capacity in 25T/h boiler below.
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Address after: 510000 Meiji Industrial Zone Wudong No. 3 101, Nan'an Village, Zengcheng Xintang Town, Guangzhou, Guangdong Province Applicant after: GUANGZHOU COBBER WATER TREATMENT TECHNOLOGY CO., LTD. Address before: Zengcheng Xintang Town, Guangdong city of Guangzhou province Nanan 510000 village square Beining Industrial Zone five gold base No. 3 101 Applicant before: GUANGZHOU COBBER WATER TREATMENT TECHNOLOGY CO., LTD. |
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Application publication date: 20181214 |