CN109763018B

CN109763018B - Descaling and antiscaling alloy, descaling device and preparation method thereof

Info

Publication number: CN109763018B
Application number: CN201910137039.0A
Authority: CN
Inventors: 李书召
Original assignee: Wuhan Zhongsheng Site Technology Co ltd
Current assignee: Wuhan Zhongsheng Site Technology Co ltd
Priority date: 2019-02-25
Filing date: 2019-02-25
Publication date: 2021-08-20
Anticipated expiration: 2039-02-25
Also published as: CN109763018A

Abstract

The invention discloses a descaling and antiscaling alloy which comprises the following raw material components in percentage by mass: 71 to 75 percent of copper, 6 to 10 percent of nickel, 0.5 to 3 percent of tin, 5 to 15 percent of zinc and 6.5 to 10 percent of lead; the invention also discloses a scale remover made of the scale removing and preventing alloy and a preparation method thereof; the 5-clock element combination is used for performing electrochemical action on various scaling components in water, so that electrons of various ions are transferred and separated to form monomolecular crystals which independently exist in the water, the scale prevention effect is realized, the scale removal effect is good, the scale inhibition rate is high and is 97.37 percent, the production efficiency is improved, the pollution emission is reduced, and the service life of equipment is prolonged; the average value is that after one heat exchange device is installed with the scale inhibitor of the invention, the gas cost is saved (552965+238041) ÷ 2 ═ 395503 yuan one year, and the catalytic life of the alloy material is very long, so the continuous use is more economical.

Description

Descaling and antiscaling alloy, descaling device and preparation method thereof

Technical Field

The invention relates to the technical field of alloys, in particular to a descaling and antiscaling alloy, a descaling device and a preparation method thereof.

Background

In the rapid development process of the current industrial revolution, the trouble of enterprises is caused by the scaling problem in the heat exchange process. The scaling problem is not well solved when people use water in industrial production until now. The development of water treatment equipment also appears in a great variety, and the effect of the water treatment equipment does not meet the long-term production requirement of enterprises. The production efficiency is low and the energy consumption is increased due to the scale formation of the circulating water in the production of enterprises.

An industrial circulating cooling water system is an indispensable component of industrial production equipment, and along with the operation of the system, scales are generated on the heat exchange surface, so that the exchange efficiency of a heat exchanger is reduced. In order to prevent the circulating cooling water system from generating dirt in the operation process, the system must be subjected to scale inhibition treatment. The traditional chemical method has good scale inhibition effect but is contrary to the requirements of environmental protection and sustainable development.

Then we come to understand how the scale is formed? In nature, calcium carbonate (CaCO)₃) Present as limestone and marble; silica (SiO)₂) Alumina (Al)₂O₃) And calcium sulfate (CaSO)₄) Then it is a stoneThe main impurities in the apatite act as a binder (binder). In nature, magnesium carbonate (MgCO) is deposited in large quantities₃) With calcium carbonate as dolomite (CaCO)₃。MgCO₃) In the form of (I), or as magnesite (MgCO)₃) But exists. Even if a layer of lime stone in a high mountain area, such as the great canyon of Arizona, is formed over a mile in depth from remains of marine organisms deposited on the sea floor, which remain with CaCO over centuries₃With Silica (SiO) as a binder₂) Alumina (Al)₂O₃) And/or clay (SiO)₂.Al₂O₃.12H₂O) are combined together. In addition, limestone typically contains some MgCO₃. In the case of the large canyon in arizona, scientists have identified at least seven different layers of limestone, each with shells of marine animals, indicating that the area has covered at least seven different seas in geological history.

CaCO₃Only slightly soluble in water, however, due to rain water under the action of limestone, large amounts of calcium become soluble in most of the water. Rainwater is somewhat acidic because it encounters carbon dioxide (CO) as it descends through the atmosphere₂) The two react to produce carbonic acid (H)₂CO₃) As shown in the following formula:

H₂O+CO₂→H₂CO₃

when rainwater contacts limestone on the ground, the limestone dissolves into the solution as calcium bicarbonate, as shown in the following equation:

CaCO₃+2H₂CO₃→Ca²⁺+2HCO₃ ^-+2H₂O+CO₂

the carbonic acid can be slightly ionized:

H₂CO₃→H++HCO₃ ^-

due to HCO₃ ^-The ionization constant of (a) is very small:

K1＝〔H+〕+〔CO₃ ^2-〕

the increased H + concentration from carbonic acid will reduce CO₃ ^2-Concentration of (CO)₃ ^2-Is CaCO₃Ions generated by dissolution of solids in water) because of H⁺Ions with CO₃ ^2-Ion binding to generate micro-ionized bicarbonate ion HCO₃ ^-. CO in solution₃ ^2-The decrease in ion concentration causes more CaCO₃With Ca²⁺+2HCO₃ ^-In an attempt to saturate the solution and to make Ca²⁺Concentration and CO₃ ^2-The product of the concentrations being equal to CaCO₃Solubility product of (a): [ Ca ]²⁺〕×〔CO₃ ^2-〕＝1×10^-9(at 25 ℃ C.)

Surface water also dissolves carbon dioxide from the soil, which is produced by the decay and oxidation of organic matter. When this water comes into contact with the limestone, the limestone gradually dissolves. Examples of such effects are limestone caverns and hard water in wells. Ca dissolved in water when the water is heated²⁺And HCO₃ ^-Is easily converted into CaCO₃. Ca remaining in solution with increasing temperature²⁺Ions and HCO₃Reduction in the amount of ions, CaCO production₃Precipitation, as shown by the following formula:

Ca²⁺+2HCO₃ ^-—→CaCO₃+H₂O+CO₂↑

this is the fundamental reaction in water heaters and boilers that forms a large amount of "lime". When containing Ca (HCO)₃)₂The reaction also takes place as the water evaporates, leaving CaCO behind₃And (4) precipitating. For example:

MgCO₃+H₂CO₃→Mg²++2HCO₃ ^-

however, MgCO₃Solubility ratio of CaCO₃Slightly larger:

〔Mg²⁺〕×〔CO₃ ^2-〕＝Ksp＝1×10^-5(at 25 ℃ C.)

Scientists studying scale formation in different industrial systemsAnd engineers have determined, although MgCO₃And CaCO₃Are the main constituents for the formation of lime-type scales, but they require Silica (SiO)₂) Alumina (Al)₂O₃) Or calcium sulfate (CaSO)₄) As an adhesive, they are bonded together as they would be in nature.

CaSO₄When dissolved in water, Ca is added²⁺Ions and SO₄ ^2-The state of the ion exists. CaSO₄Solubility increases with increasing temperature until 100F ° is reached; thereafter, as the temperature increases, the solubility decreases. Thus, CaSO can also occur in water heaters and boilers₄And (4) precipitating. SiO 2₂(silica) and Al₂O₃(alumina) is not an ion, but a relatively electrically neutral colloidal substance, slightly soluble in water. SiO in fresh water₂The content of (A) is 1-100 mg/L. At high concentrations (above 50mg/L), chemical precipitation occurs. Colloidal substances, including SiO₂、 Al₂O₃And clay (SiO)₂.Al₂O₃.2H₂O), when suspended in water, is generally negatively charged. If these negative charges (extra electrons) are neutralized (extra electrons are removed), the colloid aggregates, precipitates, and reacts with CaCO₃、MgCO₃And CaSO₄In combination, typical calcareous scale is formed. The density and hardness of the scale is dependent on SiO₂、Al₂O₃And/or CaSO₄The content increases with an increase. Approximately 87% of the crust consists of silicon compounds, silica being the most abundant one of the silicon compounds. Aluminum is the most abundant metal and the third most abundant element. The most abundant mineral of aluminum is alumina, which is a hydrated aluminum oxide (Al)₂O₃.3H₂O) and iron oxide. Calcium is the fifth most abundant metal in the crust, and occupies more than 3 percent of the crust. Through the formation process of the scale, the scale is known to have close relationship with the environment and silica and alumina in water. The reason for forming calcium carbonate, calcium sulfate and magnesium carbonate scales is that materials are selected in a targeted mode, and the problem is solved under the environment.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a descaling and antiscaling alloy, a descaling device and a preparation method thereof, solves the scaling problem in production engineering, has good descaling effect and high scale inhibition rate of 97.37 percent, improves the production efficiency, reduces pollution emission and prolongs the service life of equipment.

The invention is realized by the following steps:

one of the purposes of the invention is to provide a descaling and antiscaling alloy which comprises the following raw material components in percentage by mass: 71 to 75 percent of copper, 6 to 10 percent of nickel, 0.5 to 3 percent of tin, 5 to 15 percent of zinc and 6.5 to 10 percent of lead.

Preferably, the descaling and antiscaling alloy comprises the following raw material components in percentage by mass: 73.54% of copper, 7.58% of nickel, 1.66% of tin, 10.63% of zinc and 6.59% of lead.

The other purpose of the invention is to provide a scaler which is made of the descaling and antiscaling alloy.

The invention also aims to provide a preparation method of the scale remover, which comprises the following steps:

step 1, according to different melting points of various metals, putting nickel and copper into a melting furnace according to a certain proportion, heating to 1350-1380 ℃ to fully melt and mix the nickel and the copper, then reducing the temperature to 750-850 ℃, putting tin and lead into the melting furnace to melt, and after the tin and the lead are fully melted, putting zinc into the melting furnace to stir and melt;

step 2, heating up and pouring after the zinc is melted;

and 3, machining the material subjected to casting molding by using a lathe, slicing and assembling.

Compared with the prior art, the invention has the following advantages and effects:

1. according to the principle of cathodic corrosion protection of ships, materials aiming at descaling and scale prevention of industrial circulating water are searched, and the potential of copper is 0.744v, the potential of nickel is 0.236v, the potential of tin is 0.14v, the potential of lead is 0.1266v, and the potential of zinc is 0.7628 v. The 5-minute element combination is used for performing electrochemical action on various scaling components in water, so that electrons of various ions are transferred and separated to form monomolecular crystals which independently exist in the water, and the effect of scaling prevention is achieved.

The descaling mechanism is as follows: since the electronegativity of ions contained in the aqueous solution is larger than that of the water treatment apparatus core member, electrons of the catalytic alloy enter the aqueous solution, and the oxidation potential of elements contained in the water treatment apparatus core member is larger than that of ions in the aqueous solution in terms of electromotive force. When water flows through the alloy body, some electrons enter the aqueous solution, replacing some of the ions that have been trapped, such as CO, during the intense rotational motion of many electrons₃ ^2-、HCO₃ ^-、SO₄ ^2-And OCl^-And the like. These substituted electrons become "free electrons" in solution, and these "free electrons" can be made up of ions or colloids with small electronegativity, e.g. Ca²⁺、Mg²⁺、SiO₂、Al₂O₃And Fe₂O₃And the like. This makes Ca²⁺、Mg²⁺CO removal₃ ^2-、SO₄ ^2-And HCO₃ ^-Form an atomic structure (Ca0, Mg0) with the result that their ionic bonds are broken when they are in aqueous solution; or their lattice bonds are broken when they are in the state of a precipitated solid, i.e., a scale. When water in water heater and boiler is heated, or the alkalinity of water reaches above pH8.4, the increase of electron number in water prevents bicarbonate ion from decomposing into H⁺And CO₃ ^2-. Colloidal substances, such as silica, alumina and rust particles, remain suspended in solution by acquiring or regaining negative charge, not adsorbing to calcium, magnesium and iron ions; the acquisition of a negative charge also causes these colloidal substances to be subjected to the action of the water present in the flowing water or to be adsorbed to the colloidal substances alreadyThe rejection of these ions by nature. This repulsive separation suppresses the hardness effect of these three ions; the hardness in water is always due to Ca²⁺、Mg²⁺、Fe²⁺Due to the presence of these ions. Silica and alumina adsorbed on the scale lattice as a binder can be detached from the scale lattice already formed. Thus, due to Ca0 and Mg0 elements and the negatively charged SiO₂(-) and Al₂O₃The crystal lattice of the scale is gradually destroyed and eliminated by (-) detachment.

The scale formation inhibiting effect of water treatment devices can be summarized as follows:

(1)Ca²⁺+2e^-→Ca0

(2)Mg²⁺+2e^-→Mg0

(3)xSiO₂+xe^-→xSiO₂(-)

(4)xAl₂O₃+xe^-→xAl₂O₃(-)

(5)xFe₂O₃+xe^-→xFe₂O₃(-)

(6)HCO₃ ^-+xe^-→HCO₃ ^-+xe^-(inhibition of decomposition to CO)₃ ^2-、H₂O、CO₂)

The effect of inhibiting scale formation in the apparatus can be summarized as follows:

(7)Ca0+2HCO₃ ^-→Ca0+H₂O+2CO₂

(8)2CO₃ ^2-→2CO₂+O₂+4e^-

(9)2HCO₃ ^-+xe^-→2HCO₃ ^-+xe^-(inhibition of decomposition to CO)₃ ^2-、H₂O、CO₂)

2. The descaling and antiscaling alloy provided by the invention comprises the following raw material components in percentage by mass: 71-75% of copper, 6-10% of nickel, 0.5-3% of tin, 5-15% of zinc and 6.5-10% of lead, and the alloy formula is developed by the inventor through the combination of metal potentials; the alloy can be used as an electrochemical catalyst in fluid, when the fluid passes through a special alloy, the fluid is in contact with an alloy material to enable the solution to generate electrochemical catalysis, the colloid distribution in the fluid is influenced, various ions and impurities in a liquid phase are not easy to form scale, old scale is gradually fallen off, the oxidation effect of the solution on metal is reduced, the reduction effect of the solution is enhanced, the metal corrosion is inhibited, the scaling problem in production engineering is solved, the descaling effect is good, and the scale inhibition rate is high and is 97.37%; and the production efficiency is improved, the pollution emission is reduced, and the service life of the equipment is prolonged. The whole reaction does not add any substance into the fluid or take away the substance from the fluid, but has degassing effect on the gas in the fluid, so that the calcium and magnesium ions in the fluid exist in a single molecule. The average value is that after one heat exchange device is installed with the scale inhibitor of the invention, the gas cost is saved (552965+238041) ÷ 2 ═ 395503 yuan one year, and the catalytic life of the alloy material is very long, so the continuous use is more economical.

Drawings

FIG. 1 is a diagram of an experimental apparatus in Experimental example 1.

Detailed Description

Example 1: descaling and antiscaling alloy

1. The descaling and antiscaling alloy of the embodiment comprises the following components in percentage by mass:

73.54% of copper, 7.58% of nickel, 1.66% of tin, 10.63% of zinc and 6.59% of lead.

2. A scale remover is made of the scale removing and preventing alloy.

3. The preparation method of the descaler comprises the following steps:

step 1, according to different melting points of various metals, putting nickel and copper into a melting furnace according to a certain proportion, heating to 1350-1380 ℃ to fully melt and mix the nickel and the copper, then cooling to 800 ℃, putting tin and lead into the melting furnace to melt, keeping for 3 minutes after the tin and the lead are fully melted, and then putting zinc into the melting furnace to stir and melt;

step 2, heating to 1250 ℃ after the zinc is melted, and pouring;

Example 2: descaling and antiscaling alloy

71% of copper, 6% of nickel, 0.5% of tin, 12.5% of zinc and 10% of lead.

2. A scale remover is made of the scale removing and preventing alloy.

3. The preparation method of the descaler comprises the following steps:

step 2, heating to 1250 ℃ after the zinc is melted, and pouring;

Example 3: descaling and antiscaling alloy

75% of copper, 10% of nickel, 3% of tin, 5% of zinc and 7% of lead.

2. A scale remover is made of the scale removing and preventing alloy.

3. The preparation method of the descaler comprises the following steps:

step 2, heating to 1250 ℃ after the zinc is melted, and pouring;

Example 4: descaling and antiscaling alloy

71% of copper, 6.5% of nickel, 1% of tin, 15% of zinc and 6.5% of lead.

2. A scale remover is made of the scale removing and preventing alloy.

3. The preparation method of the descaler comprises the following steps:

step 2, heating to 1250 ℃ after the zinc is melted, and pouring;

Comparative example 1

The alloy of this comparative example contains, in mass%: cu: 55%, Ni: 14.74%, Pb: 5.57%, Mn: 0.51%, Sn: 3.92%, Fe: 0.71%, Al: 0.1%, Zn: 19.3 percent and the balance of inevitable impurities.

The method for preparing the alloy comprises the following steps: putting the metals into a vacuum furnace according to a certain proportion, smelting for 8 hours at 1300-1400 ℃, cooling to 800 ℃, preserving heat for 4 hours, and cooling to room temperature.

Experimental example 1 measurement of descaling Effect

The test mainly evaluates the scale inhibition effect of the physical scale inhibitor researched by the applicant, the scale inhibitor made of the alloy is used for carrying out a dynamic simulation scale inhibition experiment in a chemical laboratory of Wuhan university, whether the scale inhibitor can have the scale inhibition effect in a circulating cooling water system or other water systems is evaluated, and relevant laboratory test data is given.

Firstly, the technical requirements are as follows:

in order to simulate the operation condition of the circulating water of the industrial enterprise, the water quality requirement of the test is as follows: the hardness is 8 mmoL/L (wherein the calcium is 240mg/L, the magnesium ion is 48mg/L), the chloride ion content is 188-200mg/L, the conductivity is about 2000 mus/cm, and the pH is 8.0-8.8).

Second, water sample analysis

1. According to the standard

SH 2604.12-2001 evaluation Standard for Scale and Corrosion inhibitor Performance for Industrial circulating Cooling Water treatment;

DL/T806-2013 scale and corrosion inhibitor for circulating cooling water of thermal power plant;

DL/T502 + 2006 Water vapor analysis method of thermal power plant;

GB8978-1996 Integrated wastewater discharge Standard;

GB/T11893-1989 ammonium molybdate spectrophotometry for measuring total phosphorus in water;

GB/T15451-2006 determination of total alkali and phenolphthalein alkalinity of industrial circulating cooling water.

2. Using instruments

As specified by the standard, as shown in table 1:

TABLE 1 Instrument List for the test

3. The material is as follows: the scale inhibition test piece in the dynamic scale inhibition test is made of a glass sheet covering a scale layer.

4. Test time: 2018.3.27-2018.4.24

5. And (3) water sample analysis results: the analysis results of the main water quality indexes prepared according to the requirements are shown in the table 2 and the table 3.

TABLE 2 raw water quality through pipe fittings

TABLE 3 original Water quality without passing through pipes

Expression of x hardness: 1/2Ca²⁺+1/2Mg²⁺

As can be seen from tables 2 and 3, the water distribution was substantially within the desired water quality range.

Third, laboratory test method

1. Testing device

In order to better simulate the scale formation environment, the process shown in fig. 1 was used for the experiment.

2. Experimental procedure

When the experiment is started, firstly, the glass sample piece with scales is cleaned, dried and weighed, three sample pieces are put into a system filled with water (20 liters), and are specifically and respectively put into a pipeline of a circulating water system, a circulating water tank and a heater, the experiment system is continuously operated for 24 hours without a scale inhibitor, then the operation is stopped, the heater is closed, the glass sample piece with scales is dried and weighed, and the average mass of the scales on the glass sample piece is X g after parallel experiments are carried out for 3 times. And then cleaning the pipeline of the whole circulation system, cleaning a water tank, replacing the same amount of new experiment water with the same water quality, continuously running the experiment for 24 hours under the same experiment condition through the scale inhibitor provided by the embodiment 1 of the invention, then stopping running, closing the heater, drying and weighing the scaled glass sample piece, and performing parallel tests for 3 times to obtain the average mass of the scale deposited on the glass sample piece of W g.

3. Operating conditions

The operating conditions were respectively: the flow (1m/s), the running time of 24h, the running temperature of 60 ℃ and the like, and the sealing is carried out as much as possible. The water was monitored for pH, hardness, conductivity, alkalinity, turbidity and chloride ions every 2h during the run.

4. Scale inhibition rate calculation method

Calculating the scale inhibition rate Q of the scale inhibitor according to the following formula by using test data:

5. the result of the scale inhibition experiment is as follows: the results are shown in tables 4, 5 and 6.

TABLE 4 data on pipes subjected to descaling

TABLE 5 test data for pipe fittings without descaling

TABLE 6 weight change of various test pieces

Specimen position	Passing through a scale inhibitor delta W1	Does not pass through a scale inhibitor delta W2
			In the circulating pipe	0.0002g	0.0076g
Water tank	0.0006g	0.0075g

(1) Comparing table 4 and table 5, it can be seen that the water quality passing through the scale inhibitor and not passing through the scale inhibitor has a tendency of decreasing hardness and alkalinity, and the change of pH value, conductivity and chloride ion is not large, and the change of turbidity is irregular.

(2) In the test, the scale inhibitor is found to have no scaling phenomenon in the water tank in the test of the scale inhibitor, but has the scaling phenomenon on the inner surface of the water tank in the test of the scale inhibitor, which shows that the scale inhibitor can effectively prevent the generation of scale.

(3) The scale inhibition rate Q calculated from the test data is shown in Table 7.

TABLE 7 calculation results of scale inhibition ratio

Specimen position	The scale inhibition rate%
		In the circulating pipe	97.37
Water tank	92.00

As can be seen from table 7, the scale remover provided in example 1 of the present invention was tested in a situation of simulating circulating water quality in a certain steel mill, and the scale inhibition rate in the circulating pipe was 97.37%, which has a good scale inhibition effect.

6. By adopting the method, the scale remover provided by the embodiment 2-4 and the scale removing alloy provided by the proportion 1 are used for simulating the circulating water quality condition of a certain steel mill to carry out the test, and the scale inhibition rate is as follows:

TABLE 8 calculation of Scale inhibition Rate

Item	The scale inhibition rate%
		Example 2(In the circulating pipe)	97.37
Example 3 (in the circulating pipe)	95.68
		Example 4 (in the circulating pipe)	96.21
COMPARATIVE EXAMPLE 1 (in circulating pipe)	81.46

Experimental example 2 energy saving effect detection

The fouling problem comprises: after scaling, the heat exchange efficiency is reduced, and the energy consumption is increased, so that the energy-saving effect is analyzed. Firstly, the heat quantity required for every one-degree rise of one ton of water is 1000 kilocalories; the heat released by a cubic high-fuel value gas is 8600-. I.e., a cubic high fuel value gas can raise 90 liters of water from zero degrees to 100 ℃ (without efficiency loss). The gas consumption for one ton of water to rise by one degree is 1000L/9000 Kcal 0.111m³。

The cleaner provided by the embodiment 1 of the invention is installed in the low area of the Tianlun crystal north heat exchange station 10 months in 2015 by my company. The equipment is a water pump which is used for changing a Tianlun crystal city plate into a water pump with the area of 50 square meters, the design temperature of 150 ℃, the circulating pump power of 15KW, the flow rate of 100M3/H and the lift of 32M. During use, the equipment was tested and compared at 2016 for 2 months and 24 days as follows:

firstly, the comparison of data measured in 2016 at 2 months and 24 days at the low area and the high area of the Zhengzhou Tianlun crystal north heat exchange station is as follows (the import of the primary network of the high area and the low area is parallel connection)

TABLE 9

The temperature difference of the secondary network in the high and low areas can be calculated to be 11-6.6 ═ 4.4 degrees from the table

The high-fuel value fuel gas used for raising one ton of water by one degree is 0.111m³. The fuel gas saved when the difference of 4.4 degrees between one ton of water is pushed out is 0.111 multiplied by 4.4 ═ 0.4884m³。

The flow rate of the water pump of the unit is 100T/h, the motor is normally operated at 45HZ, the flow rate of the water pump is changed, and the flow rate of the water pump is about 85 tons/hour at the frequency, namely 0.4884 multiplied by 85 is saved in each hour which is 41.514m saved in each hour³(ii) a The saving of operating 24 hours per day is 41.514 multiplied by 24 ═ 996.336m³(ii) a 996.336 x 30 ═ 29890.08m calculated in 30 days per month³(ii) a The energy saving is 29890.08 multiplied by 5 ═ 149450.4m calculated according to 5 months each year³

The latest prices of 2015 zheng natural gas are shown in table 9:

watch 10

As can be seen from the prices in table 9, the plant can be manufactured by company No. 149450 × 3.7 ═ 552965 yuan for 5 months in the heating period of 2015.

Secondly, the comparison of data measured in 2016, 3 and 2 days of the north heat exchange station in the low area and the high area of the Zhengzhou Tianlun crystal is as follows (the import of the primary network in the high and low areas is parallel)

TABLE 11

The temperature difference of the secondary net in the high and low areas can be calculated to be 40.7-38.4-2.3 degrees by the above table

High-efficiency fuel gas for increasing one degree per ton of water by 0.111m³. The fuel gas saved when one ton of water is different by 2.3 degrees is pushed out to be 0.2553m³。

The flow of the water pump of the unit is 100T/h, the motor runs at 36HZ, the flow of the water pump changes, and the flow of the water pump changes at the frequencyAbout 70 tons/hour, i.e. saving 0.2553X 70 (17.871 m) per hour³；

The saving of operating 24 hours per day is 17.871 multiplied by 24 ═ 428.904m³(ii) a 428.904 x 30 ═ 12867.12m calculated in 30 days per month³(ii) a The energy saving is 12867.12 multiplied by 5 ═ 64335.6m calculated according to 5 months each year³。

The heating period in 2015 can save 64335.6 x 3.7-238041.72 yuan for the company according to the calculation of the data of the equipment after pressure reduction in 2016, 3, month and 2 days.

The scale and scale of other equipment are corroded, the service life of the equipment is shortened, the scale and cleaning cost of the equipment is temporarily not calculated, and the gas cost (552965+238041) ÷ 2-395503 yuan is saved one year after the scale inhibitor is installed on one heat exchange device by taking the average value.

The experimental example shows that the gas consumption and investment of the scale remover in the heating period per year can save a large amount of expenditure, reduce the maintenance cost, prolong the service life of equipment, save the energy consumption and reduce the emission of carbon dioxide, and thus the scale remover makes greater contribution to the improvement of the atmospheric environment.

It should be noted that other embodiments (embodiment 2 to embodiment 4) of the present invention can achieve similar effects to embodiment 1, and are not repeated herein.

The invention is not to be considered as limited to the particular embodiments shown, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The descaling and antiscaling alloy is characterized by comprising the following raw material components in percentage by mass: 71 to 75 percent of copper, 6 to 10 percent of nickel, 0.5 to 3 percent of tin, 5 to 15 percent of zinc and 6.5 to 10 percent of lead; the method for preparing the scale remover by using the scale removing and preventing alloy comprises the following steps: step 1, according to different melting points of various metals, putting nickel and copper into a melting furnace according to a certain proportion, heating to 1350-1380 ℃ to fully melt and mix the nickel and the copper, then reducing the temperature to 750-850 ℃, putting tin and lead into the melting furnace to melt, and after the tin and the lead are fully melted, putting zinc into the melting furnace to stir and melt; and 2, heating up to cast after the zinc is melted.

2. The descaling and anti-scaling alloy according to claim 1, which comprises the following raw material components in percentage by mass: 73.54% of copper, 7.58% of nickel, 1.66% of tin, 10.63% of zinc and 6.59% of lead.

3. A scale remover, characterized by being made of the scale removing and preventing alloy according to any one of claims 1-2.

4. A method for preparing a descaler according to claim 3, comprising the steps of:

step 2, heating up and pouring after the zinc is melted;

5. The method for manufacturing a scale remover as claimed in claim 4, wherein in the step 1, after the tin and lead are sufficiently melted, the tin and lead are kept for 3 minutes, and then the zinc is added and stirred to be melted.

6. The method for manufacturing a scale remover as claimed in claim 4, wherein in the step 2, the casting is started by raising the temperature to 1200 ℃ -1300 ℃ after the zinc is melted.

7. The method for preparing a scale remover according to claim 4, wherein the cutting is designed according to pressure, flow rate, and pressure difference in the step 2.