CN106477741A - Circulating water treatment composition and its processing method of application and recirculated water - Google Patents
Circulating water treatment composition and its processing method of application and recirculated water Download PDFInfo
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Abstract
The present invention relates to chemical industry cleaning field, discloses a kind of circulating water treatment composition, said composition contains weight ratio for 1：The heterocyclic compound of 2.5-40 and hydrophilic colloid, the hetero atom in the heterocyclic compound are nitrogen.The composition preferably also contains without phosphorus polymer.The invention also discloses a kind of processing method of recirculated water, comprises the following steps：Circulation water running initial period：The heterocyclic compound of 3-12mg/L and the hydrophilic colloid of 30-120mg/L is added, carries out the pre- film of normal temperature；Circulation water running enriching stage：The without phosphorus polymer of 6-30mg/L is added, starts thermic load moisturizing；The recirculated water stable stage：Continue moisturizing blowdown, it is 1-4mg/L to add medicament and cause the concentration of heterocyclic compound in recirculated water, and the concentration of hydrophilic colloid is 10-40mg/L, and the concentration of without phosphorus polymer is 2-10mg/L.Additionally, the invention also discloses application of the composition as prefilming agent or corrosion inhibiting and descaling agent in circulating water treatment.The composition of the present invention is not phosphorous, can effectively realize pre- film and/or scale inhibitor.
Description
Technical field
The present invention relates to cleaning chemical field, in particular it relates to a kind of circulating water treatment composition and its
Application and the processing method of recirculated water.
Background technology
Need mainly corrosion and scaling and the microbial growth three of solution big in recirculated cooling water running
Problem.Wherein microorganism is mainly controlled by bactericide.Corrosion is have each other closely to join with fouling
Two contrary trend of system, grasp the balance between the two trend, are the passes for solving this two large problems
Key.Therefore, corrosion and fouling control typically select composite drug, each single dose in composite drug it
Between often there is certain concertedness, can preferably play a part of scale inhibitor.
Many in circulating water treatment composite drug at present is main corrosion inhibiter using organic phospho acid, corrodes in water quality
Property stronger when, also need add phosphate to strengthen the corrosion mitigating effect of formula.Even with quickly being formed
The zinc salt of precipitation membrane, as its film quality is soft easily destroyed, still needs to use cooperatively with phosphorous medicament.However,
As the discharge of phosphorus can cause the eutrophication of water body, the use of high phosphorous reagent combination is increasingly limited.
Low-phosphorous, the without phosphorus formula of corrosion and scale inhibitor of exploitation becomes the direction of water treatment agent exploitation.
Before recirculating cooling water system is driven, system is carried out and pre- film.So-called pre- film is directed to
Prefilming agent is added in system, generates one layer with resistance to by physics chemical action in the metal surface for cleaning up
The process of the diaphragm of erosion effect.Pre-film plan can be divided into two big class：One class is the pre- film of proprietary formula
Scheme, has no between formula composition when its composition and afterwards day-to-day operation and directly contacts, need after pre- film
The row's of increasing rate of water make-up, enters line replacement to system, relatively complicated in operation and management.At present, domestic wide
The pre-film plan of the general proprietary formula for using is mainly the compound prescription of Quadrafos and zinc salt.Although pre- film
Work well, but added amount of chemical is big, the phosphorus after pre- film in waste water and Zn content are high, and environment water is deposited
In potential pollution risk.The another kind of pre-film plan for being to improve concentration, the feature of this kind of pre-film plan is
Have between the composition of the composition of pre- film formulation and normal operation formula close contact, after the completion of pre- film, in advance
Film is replaced in running naturally, makes guarantor by the corrosion inhibiter that need to only keep low concentration during normal operation
Cuticula is maintained and repairs, all relatively simple in operation and management.Therefore, exploitation is suitable for improving
The low-phosphorous medicament of the pre-film plan of concentration has more Practical significance.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art, provides and a kind of new can be used for circulating water treatment
In without phosphorus composition and its application and recirculated water processing method.
The hydrophilic colloids such as xanthans, guar gum and Arabic gum (natural polysaecharides hydrophilic colloid),
Due to macromolecular special construction and colloid property, and with several functions, can be used as emulsifying agent, steady
Determine agent, gelling thickener, size, film forming agent etc., be widely used in all fields of national economy, right
In which, as the research of corrosion inhibiter this respect, there is not been reported.But the present inventor's research finds,
By can effectively realize pre- film and corrosion-mitigation scale-inhibition with the use of hydrophilic colloid and heterocyclic compound.
Therefore, to achieve these goals, in a first aspect, the invention provides a kind of circulating water treatment is used
Composition, said composition contain heterocyclic compound and hydrophilic colloid, the heterocyclic compound and hydrophily
The weight ratio of colloid is 1：2.5-40, the hetero atom in the heterocyclic compound are nitrogen.Preferably, institute
Composition is stated also containing without phosphorus polymer.
Second aspect, the invention provides the composition described in a kind of use first aspect is circulated at water
The method of reason, the method are comprised the following steps：
(1) water running initial period is circulated：Add 3-12mg/L recirculated water heterocyclic compound and
The hydrophilic colloid of 30-120mg/L recirculated water, carries out the pre- film of normal temperature；
(2) water running enriching stage is circulated：The without phosphorus polymer of 6-30mg/L recirculated water is added, is started
Thermic load moisturizing；
(3) the recirculated water stable stage：Continue moisturizing blowdown, when hydrophilic colloid is in recirculated water
In concentration when reaching 10-40mg/L recirculated water, add heterocyclic compound, hydrophilic colloid and without phosphorus polymerization
Thing so that the concentration of heterocyclic compound is 1-4mg/L recirculated water in recirculated water, the concentration of hydrophilic colloid
For 10-40mg/L recirculated water, the concentration of without phosphorus polymer is 2-10mg/L recirculated water.
The third aspect, the invention provides the composition is as prefilming agent or corrosion inhibiting and descaling agent in recirculated water
Application in process.
The composition of the present invention is not phosphorous, environmentally friendly.And, the composition of the present invention is used for following
During ring water process, pre- film and/or scale inhibitor can be effectively realized.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific embodiment
Specific embodiment to the present invention is described in detail below.It should be appreciated that this place is retouched
The specific embodiment that states is merely to illustrate and explains the present invention, is not limited to the present invention.
In the present invention, term " heterocyclic compound " refers to there is the ring-type being made up of carbon atom and hetero atom
The material of structure, however it is not limited to the definition of compound (pure substance), multiple different with by carbon atom
And the mixture of the compound of the circulus of hetero atom composition is also contained in the jeterocyclic chemistry of present invention definition
In the range of compound, also referred to as " heterocyclic type corrosion inhibiter ", " heterocycle type organic " or " heterocyclic thing
Matter " etc..
(without phosphorus) circulating water treatment composition that the present invention is provided contains heterocyclic compound and hydrophilic gel
Body, the weight ratio of the heterocyclic compound and hydrophilic colloid is 1：2.5-40, preferably 1：4-25,
Hetero atom in the heterocyclic compound is nitrogen.
In the present invention, the heterocyclic compound can be the common various nitrogen-containing heterocycle compounds in this area
(quantity of hetero atom (nitrogen-atoms) is 1,2 or 3), is preferably selected from (substituted or unsubstituted) five
Membered heterocyclic compound, (substituted or unsubstituted) 6-membered heterocyclic compound and (substituted or unsubstituted)
Benzene-fused heterocyclic compound (as phenyl ring and five-ring heterocycles condense the heterocyclic compound for obtaining and/or phenyl ring with hexa-atomic
The heterocyclic fused heterocyclic compound for obtaining) at least one, for example, (substituted or unsubstituted) pyrrole
Cough up, (substituted or unsubstituted) benzopyrrole, (substituted or unsubstituted) imidazoles, (replace or do not take
Generation) benzimidazole, (substituted or unsubstituted) pyrazoles, (substituted or unsubstituted) pyridine, (take
Generation or unsubstituted) pyrazine, (substituted or unsubstituted) pyrimidine, (substituted or unsubstituted) benzo pyrrole
Azoles, (substituted or unsubstituted) benzopyrazines, (substituted or unsubstituted) benzo pyrimidine, (replace or
Unsubstituted) quinoline, (substituted or unsubstituted) isoquinolin and (substituted or unsubstituted) benzo three
At least one in nitrogen azoles.
Wherein, substituted group can be phenyl, hydroxyl, amino, nitro and C1-C3Alkyl (such as
At least one of methyl).
It is highly preferred that the heterocyclic compound selected from benzopyrrole, 2-methylimidazole, 2- phenylpyridine,
2- HYDROXYPYRAZINE, 2- amino -5- methoxy pyrimidine, 4- methylquinoline, 5- nitroisoquinoline, three nitrogen of benzo
At least one in azoles and methyl benzotriazazole.
In the present invention, the hydrophilic colloid is natural polysaecharides hydrophilic colloid, and such as natural gum (can be molten
In water and the heteroglycan of sticky solution is formed, referring to Wang Jingyan etc.,《Biochemistry》The third edition first volume
Page 51).Under preferable case, the hydrophilic colloid is in xanthans, guar gum and Arabic gum
At least one.
By with the use of heterocyclic compound and hydrophilic colloid, the composition of the present invention is particularly well-suited to follow
Pre- film step in ring water process.Therefore, present invention also offers above-mentioned containing heterocyclic compound and hydrophilic
Application of the composition of property colloid as prefilming agent in circulating water treatment.The composition of the present invention is used as pre-
When film is used, consumption is preferably 30-135mg/L recirculated water.
In the present invention, the composition can also be containing without phosphorus polymer to realize the slow of recirculated water further
Erosion scale inhibition.The weight ratio preferably 1 of the heterocyclic compound and without phosphorus polymer：0.5-10, more preferably
For 1：1-5.5.
Preferably, the glutinous number of the limit of the without phosphorus polymer is 0.03-0.1dl/g.
It is highly preferred that the without phosphorus polymer is without phosphorus homopolymers (as C3-C10(C3、C4、C5、C6、
C7、C8、C9Or C10) unsaturated carboxylic acid without phosphorus homopolymers), further preferably selected from poly-aspartate,
At least one in poly-epoxy succinic acid, polyacrylic acid and HPMA.
In a preferred embodiment of the invention, the without phosphorus polymer and the heterocyclic compound and described
Hydrophilic colloid is retained separately, so as to be particularly convenient for the different phase of circulating water treatment.Wherein, institute
State heterocyclic compound to be retained separately with the hydrophilic colloid, it is also possible to which mixing is preserved.
By using cooperatively without phosphorus polymer further, the composition of the present invention is particularly well-suited to recirculated water
Corrosion-mitigation scale-inhibition.Therefore, present invention also offers above-mentioned containing heterocyclic compound, hydrophilic colloid and without phosphorus
Application of the composition of polymer as corrosion inhibiting and descaling agent in circulating water treatment.The composition of the present invention is made
When using for corrosion inhibiting and descaling agent, consumption is preferably 10-55mg/L recirculated water.
According to the preferred embodiment of the present invention, the composition is made up of mentioned component.
The composition of the present invention is can be widely used for basic, normal, high hardness, water quality the following as moisturizing of basicity
In ring water process, that is, (low less than 100mg/L with total alkalinity sum suitable for processing calcium hardness
Hardness, basicity water quality) in circulating water treatment (using natural ph technique)；It is also applied for processing calcium
Hardness and (medium hardness, basicity water quality) circulating water treatment that total alkalinity sum is 100-300mg/L
In (using natural ph technique)；Apply also for processing calcium hardness with total alkalinity sum more than 300mg/L
(high hardness, basicity water quality) circulating water treatment in (control ph is 7.8-8.2, adjusts pH
Value acid used can be various acid commonly used in the art, such as sulfuric acid and/or nitric acid).
In practical application, such as can incite somebody to action according to aforementioned formula each using the composition is front prepared
Add in recirculated cooling water after component mixing；Can also be by each component according to aforementioned formula without mixing
Step and be directly added in recirculated cooling water.When being directly added into, the addition sequence to each component does not have spy
Other restriction.Further, it is also possible to each component is mixed with water so as to add circulation after fully dissolving
In cooling water.
In addition, the method for being circulated water process using above-mentioned composition that the present invention is provided includes following step
Suddenly：
(1) water running initial period is circulated：Add 3-12mg/L recirculated water heterocyclic compound and
The hydrophilic colloid of 30-120mg/L recirculated water, carries out the pre- film of normal temperature；
(2) water running enriching stage is circulated：The without phosphorus polymer of 6-30mg/L recirculated water is added, is started
Thermic load moisturizing；
(3) the recirculated water stable stage：Continue moisturizing blowdown, when hydrophilic colloid is in recirculated water
In concentration when reaching 10-40mg/L recirculated water, add heterocyclic compound, hydrophilic colloid and without phosphorus polymerization
Thing so that the concentration of heterocyclic compound is 1-4mg/L recirculated water in recirculated water, the concentration of hydrophilic colloid
For 10-40mg/L recirculated water, the concentration of without phosphorus polymer is 2-10mg/L recirculated water.
In the circulating water treatment method of the present invention, the concrete operations to each stage are not particularly required,
Carry out in a conventional manner, and those skilled in the art can be carried out to the concrete operations in each stage
Select, this is no longer going to repeat them.
Wherein, the run time of circulation water running initial period is generally at more than 24h (as 24-35h).
In circulation water running initial period, the pre- film of normal temperature refers to carry out pre- film under conditions of not actuated thermic load,
Temperature is usually 20-25 DEG C.
In circulation water running enriching stage, the cycles of concentration of recirculated water is usually 3-5 times.
In the recirculated water stable stage, it is also possible to thrown using heterocyclic compound or without phosphorus polymer as judgement
The benchmark on adding medicine opportunity, i.e. concentration of the heterocyclic compound in recirculated water can be worked as reach 1-4mg/L and follow
During ring water, heterocyclic compound, hydrophilic colloid and without phosphorus polymer is added；Or, when without phosphorus polymer
When concentration in recirculated water reaches 2-10mg/L recirculated water, add heterocyclic compound, hydrophilic colloid and
Without phosphorus polymer.As heterocyclic compound, hydrophilic colloid and without phosphorus polymer are added in ratio, ability
Field technique personnel are it will be appreciated that aforesaid operations mode is also within the scope of the present invention.
In order to control the growth of microorganism in recirculated water, the method for the present invention can also include to add bactericide
The step in recirculated water is added to, the bactericide can be added in the recirculated water stable stage, Ke Yiyu
Heterocyclic compound, hydrophilic colloid and without phosphorus polymer are while or asynchronously add.The bactericide for using
Species and amount all can be selected for the various conventional of those skilled in the art, be will not be described here.
Hereinafter will be described the present invention by embodiment.
In following examples, xanthans, guar gum and Arabic gum are limited purchased from Zhengzhou feudal dynasty chemical products
Company；(limit sticks number for poly-aspartate (limit glutinous number be 0.089dl/g), poly-epoxy succinic acid
0.032dl/g), (limit is sticked for polyacrylic acid (the glutinous number of the limit is 0.071dl/g) and HPMA
Number is 0.068dl/g) it is purchased from Shandong Taihe Water Treatment Co., Ltd.；The water quality of test water such as table 1
Shown, wherein Ca2+, total alkalinity and total hardness be all with CaCO3Meter.
Ca2+Detection reference standard GB/T 6910-2006；Total alkalinity detects reference standard GB/T
15451-2006；Total hardness detects reference standard GB/T 6909-2008；Cl-Detection reference standard GB/T
15453-2008；Electrical conductivity detects reference standard GB/T 6908-2008；PH value detects reference standard GB/T
6920-1986.
Table 1
The evaluation of scale-inhibiting properties
The test water that calcium and total alkali are 600mg/L is prepared, in test water by embodiment and contrast
Example adds medicament, and it is 9.0 to be subsequently adding sodium tetraborate and adjust pH, is transferred in 500mL volumetric flask.
10h is stood in 80 ± 1 DEG C of waters bath with thermostatic control, after cooling residue Ca in sample analysis water2+Concentration, with
When do blank sample, and calculate scale inhibition performance.
The definition of scale inhibition performance for the scale inhibition efficiency of corrosion inhibiting and descaling agent, the computing formula of scale inhibition performance is：Scale inhibition performance
=(C-C0)/(nC1-C0) × 100%, wherein,
C：Residue Ca in water after cooling2+Concentration (mg/L)
C0：The Ca of blank sample2+Concentration (mg/L)
C1：Ca in raw water2+Concentration (mg/L)
n：Cycles of concentration
The evaluation of corrosion inhibition
20# quality carbon steel test piece is fixed on lacing film instrument, is put into and adds according to each embodiment and comparative example
In the test water of pre- film medicament, holding rotating speed is 75rmp, and rotation carries out pre- film in 24 hours.Warp
The lacing film for crossing pre- film is put into and has added in the test water of corrosion inhibiting and descaling agent according to each embodiment and comparative example,
Steady temperature is 45 ± 1 DEG C, keeps rotating speed to rotate 72h for 75rpm, the weight of test piece before and after record test,
Calculate average corrosion rate (F).PH value is not adjusted during low, middle hardness, basicity quality test of water.
During high rigidity, basicity quality test of water, control ph is 7.8-8.2.
The computing formula of average corrosion rate (F) is：F=(C × △ W)/(A × T × ρ), wherein,
C：Computational constant, during with mm/a (millimeter/year) as unit, C=8.76 × 107
△W：The corrosion weight loss (g) of test specimen
A：Area (the cm of test specimen2)
T：Corrosion test time (h)
ρ：Density (the kg/m of material for test3)
Embodiment 1
Xanthans and benzopyrrole is added in test water so as to which the concentration in test water is respectively
75mg/L and 7.5mg/L, carries out pre- film with this to lacing film.
Xanthans, benzopyrrole and HPMA is added in test water so as to used in test
Concentration in water is respectively 25mg/L, 2.5mg/L and 6mg/L, is circulated cooling water system with this
Corrosion inhibition evaluation test.
According to method for evaluation of antisludging performance test preparation water, and add thereto xanthans, benzopyrrole and
HPMA so as to the concentration in test water be respectively 25mg/L, 2.5mg/L and
6mg/L, carries out evaluation of antisludging performance test with this.
Result of the test is shown in Table 2.
Embodiment 2
Guar gum and 2-methylimidazole is added in test water so as to the concentration difference in test water
For 90mg/L and 6mg/L, pre- film is carried out to lacing film with this.
Guar gum, 2-methylimidazole and poly-epoxy succinic acid is added in test water so as to used in test
Concentration in water is respectively 30mg/L, 2mg/L and 5mg/L, is circulated cooling water system with this and delays
Erosion benchmark test.
According to method for evaluation of antisludging performance test preparation water, and add guar gum, 2-methylimidazole thereto
And poly-epoxy succinic acid so as to the concentration in test water is respectively 30mg/L, 2mg/L and 5
Mg/L, carries out evaluation of antisludging performance test with this.
Result of the test is shown in Table 2.
Embodiment 3
Arabic gum and methyl benzotriazazole is added in test water so as to dense in test water
Degree is respectively 60mg/L and 9mg/L, carries out pre- film with this to lacing film.
Arabic gum, methyl benzotriazazole and polyacrylic acid is added in test water so as in test
20mg/L, 3mg/L and 7mg/L are respectively with the concentration in water, cooling water system is circulated with this
Corrosion inhibition evaluation test.
According to method for evaluation of antisludging performance test preparation water, and add Arabic gum, methyl benzo thereto
Triazole and polyacrylic acid so as to which the concentration in test water is respectively 20mg/L, 3mg/L and 7
Mg/L, carries out evaluation of antisludging performance test with this.
Result of the test is shown in Table 2.
Embodiment 4
Xanthans and 2- phenylpyridine is added in test water so as to the concentration difference in test water
For 105mg/L and 4.5mg/L, pre- film is carried out to lacing film with this.
Xanthans, 2- phenylpyridine and poly-aspartate is added in test water so as in test water
In concentration be respectively 35mg/L, 1.5mg/L and 8mg/L, with this be circulated cooling water system delay
Erosion benchmark test.
According to method for evaluation of antisludging performance test preparation water, and add xanthans, 2- phenylpyridine thereto
And poly-aspartate so as to the concentration in test water is respectively 35mg/L, 1.5mg/L and 8mg/L,
Evaluation of antisludging performance test is carried out with this.
Result of the test is shown in Table 2.
Embodiment 5
Guar gum and 2- HYDROXYPYRAZINE is added in test water so as to the concentration difference in test water
For 45mg/L and 10.5mg/L, pre- film is carried out to lacing film with this.
Guar gum, 2- HYDROXYPYRAZINE and poly-epoxy succinic acid is added in test water so as to used in test
Concentration in water is respectively 15mg/L, 3.5mg/L and 4mg/L, is circulated cooling water system with this
Corrosion inhibition evaluation test.
According to method for evaluation of antisludging performance test preparation water, and add guar gum, 2- HYDROXYPYRAZINE thereto
And poly-epoxy succinic acid so as to the concentration in test water be respectively 15mg/L, 3.5mg/L and
4mg/L, carries out evaluation of antisludging performance test with this.
Result of the test is shown in Table 2.
Embodiment 6
Arabic gum, 2- amino -5- methoxy pyrimidine and 4- methylquinoline is added in test water so as to
Concentration in test water is respectively 120mg/L, 3mg/L and 3mg/L, lacing film is carried out with this
Pre- film.
Arabic gum, 2- amino -5- methoxy pyrimidine, 4- methylquinoline and poly- third is added in test water
Olefin(e) acid so as to which the concentration in test water is respectively 40mg/L, 1mg/L, 1mg/L and 10mg/L,
Cooling water system corrosion inhibition evaluation test is circulated with this.
According to method for evaluation of antisludging performance test preparation water, and add Arabic gum, 2- amino -5- thereto
Methoxy pyrimidine, 4- methylquinoline and polyacrylic acid so as to which the concentration in test water is respectively 40
Mg/L, 1mg/L, 1mg/L and 10mg/L, carry out evaluation of antisludging performance test with this.
Result of the test is shown in Table 2.
Embodiment 7
Xanthans, guar gum and BTA is added in test water so as in test water
Concentration is respectively 30mg/L, 30mg/L and 12mg/L, carries out pre- film with this to lacing film.
It is poly- that xanthans, guar gum, BTA, poly-aspartate and hydrolysis is added in test water
Maleic anhydride so as to which the concentration in test water is respectively 10mg/L, 10mg/L, 4mg/L, 2mg/L
And 2mg/L, cooling water system corrosion inhibition evaluation test is circulated with this.
According to method for evaluation of antisludging performance test preparation water, and add xanthans, guar gum, benzene thereto
And triazole, poly-aspartate and HPMA so as to the concentration in test water is respectively
10mg/L, 10mg/L, 4mg/L, 2mg/L and 2mg/L, carry out evaluation of antisludging performance test with this.
Result of the test is shown in Table 2.
Embodiment 8
Mode according to embodiment 1 is circulated the evaluation test of cooling water system corrosion inhibition and scale-inhibiting properties
Evaluation test, except for the difference that, replaces " benzopyrrole " with " 5- nitroisoquinoline ", and result of the test is shown in
Table 2.
Comparative example 1
Xanthans is added in test water so as to which the concentration in test water is 82.5mg/L, with
This carries out pre- film to lacing film.
Xanthans and HPMA is added in test water so as to the concentration in test water
Respectively 27.5mg/L and 6mg/L, is circulated cooling water system corrosion inhibition evaluation test with this.
According to method for evaluation of antisludging performance test preparation water, and add xanthans and the poly- Malaysia of hydrolysis thereto
Acid anhydrides so as to which the concentration in test water is respectively 31mg/L and 6mg/L, carries out scale inhibition performance with this
Can evaluation test.
Result of the test is shown in Table 2.
Comparative example 2
Benzopyrrole is added in test water so as to which the concentration in test water is 82.5mg/L, with
This carries out pre- film to lacing film.
Benzopyrrole and HPMA is added in test water so as to dense in test water
Degree is respectively 27.5mg/L and 6mg/L, is circulated cooling water system corrosion inhibition evaluation test with this.
According to method for evaluation of antisludging performance test preparation water, and add benzopyrrole and the poly- horse of hydrolysis thereto
Carry out acid anhydrides so as to which the concentration in test water is respectively 27.5mg/L and 6mg/L, is hindered with this
Dirty benchmark test.
Result of the test is shown in Table 2.
Embodiment 9
Pre- film is not carried out to lacing film.
Xanthans, benzopyrrole and HPMA is added in test water so as to used in test
Concentration in water is respectively 25mg/L, 2.5mg/L and 6mg/L, is circulated cooling water system with this
Corrosion inhibition evaluation test.
Result of the test is shown in Table 2.
Table 2
Note："/" represents undetermined
From the results shown in Table 2, the circulating water treatment that the present invention is provided is with composition (embodiment 1-8)
Combination property is good, with excellent corrosion mitigating effect and scale inhibition effect.
Especially, comparative example 1-2 is compared with embodiment 1-8 as can be seen that hydrophilic colloid and heterocycle
Compound is used in conjunction with, and just has good synergy.Embodiment 9 is compared with embodiment 1-8 can
To find out, pre-filming treatment can significantly improve corrosion mitigating effect, and the circulating water treatment combination of the present invention is described
Thing has preferably pre-film effect as prefilming agent.
Embodiment 10
For simulated field, dynamic analog test has been carried out.Dynamic analog test method is common by the Chinese people
Carry out with state chemical industry standard HG/T2160-91, test piece and test tube material are 20# carbon steel.Control
Parameter processed is as follows.
Water quality：Test water 1-3 in table 1.
Circulation water running initial period：The dosage of xanthans is 75mg/L, the dosage of benzopyrrole
For 7.5mg/L, in the case of nothing thermic load, continuously run 24h.
Circulation water running enriching stage：The dosage of HPMA is 18mg/L, starts heat negative
Lotus, does not adjust pH value and concentrates 6 times (test water 1) in the case of without exhaust waste or do not adjust
PH value is simultaneously concentrated into calcium ion content in recirculated water in the case of without exhaust waste and with total alkalinity sum is
1000mg/L (test water 2) or to adjust pH value to 8.0 ± 0.2 and dense in the case of without exhaust waste
It is 1100mg/L (test water 3) to be reduced to calcium ion content in recirculated water.
The recirculated water stable stage：Blowdown moisturizing, when concentration of the xanthans in recirculated water reaches
During 25mg/L, composite drug is added, the concentration for keeping xanthans in recirculated water is 25mg/L, benzo pyrrole
The concentration that coughs up is 2.5mg/L, and the concentration of HPMA is 6mg/L.
Flow velocity：1.0m/s
Inlet temperature of the recirculated water at heat exchanger entrance：32±1℃
The circulation water entrance temperature difference：8-10℃
Run time：16 days
Dynamic analog test the results are shown in Table 3.
Adhesion speed computing formula be：Adhesion speed=3 × (W1-W2)/(A × t), wherein,
W1：Test tube weight (g) after examination
W2：Test tube weight (g) after pickling
A：Test tube internal surface area (m2/ root)
t：Test period (my god)
Table 3
| Lacing film corrosion rate (mm/a) | Test tube adhesion speed (mcm) | |
| Test water 1 | 0.031 | 5.8 |
| Test water 2 | 0.021 | 7.6 |
| Test water 3 | 0.042 | 4.9 |
Result shown in table 3 shows, by the circulating water treatment of the present invention with composition for circulating water treatment
In, the corrosion rate of lacing film is worked out better than production department of China Petrochemical Corporation and development division《Cooling
Water analysis and test method》In《The small-sized experimental analogic method of laboratory》" fine level " standard；Adhesion speed
Rate reach production department of China Petrochemical Corporation and development division establishment《Cooling water analysis and test side
Method》In《The small-sized experimental analogic method of laboratory》In " fine level " standard.
Circulating water treatment composition by using the present invention, it is ensured that recirculated cooling water (low, in,
High rigidity and basicity water quality are the recirculated cooling water of moisturizing) stable operation, with good inhibition, resistance
Dirt effect, and medicament is not phosphorous, and Circulating water effluent can be avoided to cause the risk of body eutrophication.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the present invention, can be to the technical side of the present invention
Case carries out multiple simple variant, and these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means, in order to avoid need not
The repetition that wants, the present invention are no longer separately illustrated to various possible combinations.
Additionally, can also be combined between a variety of embodiments of the present invention, as long as its
Without prejudice to the thought of the present invention, which should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of circulating water treatment composition, it is characterised in that said composition contains heterocyclic compound
And hydrophilic colloid, the weight ratio of the heterocyclic compound and hydrophilic colloid is 1：2.5-40, preferably
For 1：4-25, the hetero atom in the heterocyclic compound are nitrogen.
2. composition according to claim 1, wherein, the heterocyclic compound selected from replacing or
Unsubstituted five member ring heterocyclic compound, substituted or unsubstituted 6-membered heterocyclic compound and replacement or unsubstituted
Benzene-fused heterocyclic compound at least one, it is preferable that the heterocyclic compound selected from benzopyrrole,
2-methylimidazole, 2- phenylpyridine, 2- HYDROXYPYRAZINE, 2- amino -5- methoxy pyrimidine, 4- methylquinoline,
At least one in 5- nitroisoquinoline, BTA and methyl benzotriazazole.
3. composition according to claim 1, wherein, the hydrophilic colloid selected from xanthans,
At least one in guar gum and Arabic gum.
4. the composition according to any one in claim 1-3, wherein, the composition is also
Containing without phosphorus polymer, the weight ratio of the heterocyclic compound and without phosphorus polymer is 1：0.5-10, excellent
Elect 1 as：1-5.5.
5. composition according to claim 4, wherein, the glutinous number of the limit of the without phosphorus polymer
For 0.03-0.1dl/g.
6. the composition according to claim 4 or 5, wherein, the without phosphorus polymer is C3-C10
The without phosphorus homopolymers of unsaturated carboxylic acid, it is preferable that the without phosphorus polymer is selected from poly-aspartate, polycyclic
At least one in oxydisuccinic acid, polyacrylic acid and HPMA.
7. composition according to claim 4, wherein, the without phosphorus polymer and the heterocycle
Compound and the hydrophilic colloid are retained separately.
8. a kind of usage right requires that the composition in 1-7 described in any one is circulated water process
Method, it is characterised in that the method is comprised the following steps：
(1) water running initial period is circulated：Add 3-12mg/L recirculated water heterocyclic compound and
The hydrophilic colloid of 30-120mg/L recirculated water, carries out the pre- film of normal temperature；
(2) water running enriching stage is circulated：The without phosphorus polymer of 6-30mg/L recirculated water is added, is started
Thermic load moisturizing；
(3) the recirculated water stable stage：Continue moisturizing blowdown, when hydrophilic colloid is in recirculated water
In concentration when reaching 10-40mg/L recirculated water, add heterocyclic compound, hydrophilic colloid and without phosphorus polymerization
Thing so that the concentration of heterocyclic compound is 1-4mg/L recirculated water in recirculated water, the concentration of hydrophilic colloid
For 10-40mg/L recirculated water, the concentration of without phosphorus polymer is 2-10mg/L recirculated water.
9. the composition in claim 1-3 described in any one is as prefilming agent in circulating water treatment
Application, the consumption of the composition is preferably 30-135mg/L recirculated water.
10. the composition in claim 4-7 described in any one is as corrosion inhibiting and descaling agent at recirculated water
Application in reason, the consumption of the composition are preferably 10-55mg/L recirculated water.
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| CN113943940A (en) * | 2021-10-15 | 2022-01-18 | 山东艾普特暖通技术有限公司 | Complete heat preservation and transportation method for heating, ventilation and air conditioning water system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20204720U1 (en) * | 2002-03-25 | 2002-06-13 | Reckitt Benckiser Nv | Thickened aqueous compositions |
| CN1511791A (en) * | 2002-12-30 | 2004-07-14 | 中国石油化工股份有限公司北京燕山分 | Method for utiliznig sterilizing agent in circular cooling water |
| CN104743685A (en) * | 2015-03-21 | 2015-07-01 | 威海翔宇环保科技股份有限公司 | Long-acting sustained-release scale and corrosion inhibitor for circulating water |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20204720U1 (en) * | 2002-03-25 | 2002-06-13 | Reckitt Benckiser Nv | Thickened aqueous compositions |
| CN1511791A (en) * | 2002-12-30 | 2004-07-14 | 中国石油化工股份有限公司北京燕山分 | Method for utiliznig sterilizing agent in circular cooling water |
| CN104743685A (en) * | 2015-03-21 | 2015-07-01 | 威海翔宇环保科技股份有限公司 | Long-acting sustained-release scale and corrosion inhibitor for circulating water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943940A (en) * | 2021-10-15 | 2022-01-18 | 山东艾普特暖通技术有限公司 | Complete heat preservation and transportation method for heating, ventilation and air conditioning water system |
| CN113943940B (en) * | 2021-10-15 | 2023-11-17 | 山东艾普特暖通技术有限公司 | Complete set of transportation protection method for heating ventilation air conditioning water system |
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