阅读说明：本技术 一种烷基化提纯分馏系统冷换设备防腐蚀系统及其方法 (Anti-corrosion system and method for cold exchange equipment of alkylation purification fractionation system ) 是由 马潜飞 薛立凤 丁会华 于 2021-10-29 设计创作，主要内容包括：本发明提供的一种烷基化提纯分馏系统冷换设备防腐蚀系统及其方法,主要包括：储药单元,所述储药单元包括储药桶与搅拌机构,三个所述储药桶分别用以储存不同的药剂,所述储药桶上设置有药液进料管与进水管；储水单元,所述储水单元包括储水箱与设置在储水箱内的搅拌机构；输送单元,所述输送单元包括出料管、连接管、送药管、排污管与排污槽,所述出料管与排污管均设置在储药桶下方且与储药桶相连通,三个所述储药桶上的排污管相连通并延伸至排污槽,任意两个储药桶上的出料管之间设置有连接管,所述连接管下方连通设置有三个送药管。本发明可以提高空冷器用水的水质,延长其使用寿命。(The invention provides an anti-corrosion system and method for cold exchange equipment of an alkylation purification fractionation system, which mainly comprise the following steps: the medicine storage unit comprises medicine storage barrels and a stirring mechanism, the three medicine storage barrels are used for storing different medicines respectively, and a medicine liquid feeding pipe and a water inlet pipe are arranged on each medicine storage barrel; the water storage unit comprises a water storage tank and a stirring mechanism arranged in the water storage tank; carry the unit, carry the unit and include discharging pipe, connecting pipe, send pencil, blow off pipe and blowdown groove, discharging pipe and blow off pipe all set up in storage medicine bucket below and be linked together with storage medicine bucket, three the blow off pipe on the storage medicine bucket is linked together and extends to the blowdown groove, is provided with the connecting pipe between two arbitrary discharging pipes on storing up the medicine bucket, connecting pipe below intercommunication is provided with three pencil that send. The invention can improve the water quality of the air cooler water and prolong the service life of the air cooler water.)

1. An alkylation purification fractionating system cold exchange equipment anticorrosion system is characterized by comprising:

the medicine storage unit comprises medicine storage barrels and stirring mechanisms, the three medicine storage barrels are used for storing different medicines respectively, each stirring mechanism comprises a motor and a stirring paddle, the stirring paddles extend into the medicine storage barrels and extend to the middle lower parts of the medicine storage barrels, and the medicine storage barrels are provided with medicine liquid feeding pipes and water inlet pipes;

the water storage unit comprises a water storage tank and a stirring mechanism arranged in the water storage tank;

carry the unit, carry the unit and include discharging pipe, connecting pipe, send pencil, blow off pipe and blowdown groove, the discharging pipe all sets up in storage medicine bucket below and with store up the medicine bucket and be linked together, it is three the blow off pipe on the storage medicine bucket is linked together and extends to the blowdown groove, is provided with the connecting pipe between the discharging pipe on two arbitrary storage medicine buckets, connecting pipe below intercommunication is provided with three pencil that send, send the pencil to extend to the storage water tank and be linked together with the storage water tank, discharging pipe on the surplus storage medicine bucket directly extends to the storage water tank and is linked together with the storage water tank.

2. The anti-corrosion system for the cold exchange device of the alkylation purification fractionation system according to claim 1, wherein the drug delivery pipe is provided with an electric control valve and a metering pump, and the discharge pipe communicated with the water storage tank is also provided with an electric control valve and a metering pump.

3. The anti-corrosion system for the cold-exchange equipment of the alkylation, purification and fractionation system according to claim 1, wherein the stirring paddle comprises a stirring shaft, a stirring head and stirring blades, the stirring shaft is connected to the motor, the stirring head is disposed on the stirring shaft, at least five stirring blades are uniformly arranged around the stirring head, and the stirring blades are provided with a plurality of water permeable holes.

4. The anti-corrosion system for the alkylation, purification and fractionation system cold exchange equipment according to claim 3, wherein the water storage tank comprises a tank body, a tank cover, water diversion plates and buffer plates, the top surface of the tank body is provided with an opening, the tank cover is used for covering the tank body and is separable from the tank body, two of the water diversion plates are arranged in the tank body, a gap for liquid to pass through is formed between the water diversion plates and the bottom of the tank body, the water diversion plates divide the tank body into three medicine feeding areas, the medicine feeding areas correspond to the three medicine feeding pipes and one discharge pipe, the three buffer plates are respectively rotatably arranged at the tops of the water diversion plates and the top of one side of the tank body and are inclined downwards, and elastomers are arranged between the buffer plates and the connected water diversion plates and the tank body.

5. The system and the method for preventing corrosion of the cold exchange equipment of the alkylation, purification and fractionation system according to claim 4, wherein support legs are arranged below the box body, a backing plate is arranged below the bracket, and a gap for accommodating the motor is arranged between the box body and the backing plate.

6. An anti-corrosion method for an alkylation purification fractionation system cold-exchange equipment, which comprises the anti-corrosion system for the alkylation purification fractionation system cold-exchange equipment of any one of claims 1 to 5, and is characterized by comprising the following steps:

the method comprises the following steps: preparing medicaments, wherein the medicaments comprise a dispersion corrosion inhibitor, a scale inhibition dispersant and a bactericide, quantitative dispersion corrosion inhibitor, scale inhibition dispersant and bactericide are respectively fed into a medicament storage barrel through a liquid medicament feeding pipe, and quantitative industrial water or tap water is fed into the medicament storage barrel through a water inlet pipe to prepare the three medicaments so as to form a dispersion corrosion inhibitor medicament, a scale inhibition dispersion medicament and a bactericide;

step two: controlling the medicament in the medicament storage barrel to be sent into the water storage tank through the discharge pipe and the medicament feeding pipe, wherein the dispersed corrosion-inhibiting medicament and the scale-inhibiting dispersed medicament can be respectively sent into the water storage tank through the two medicament feeding pipes or simultaneously sent into the water storage tank through the same medicament feeding pipe, and the sterilizing medicament is sent into the water storage tank through the discharge pipe; wherein, the dosage of the dispersion corrosion inhibitor and the scale inhibition and dispersion agent is calculated according to the following formula:

wherein G is the addition amount of a dispersion corrosion inhibitor or a scale inhibition and dispersion agent, C1 is a control concentration value, the control concentration value is 20-40mg/L, C2 is the value of newly supplemented water in a water storage tank, and K is the concentration multiple;

wherein, the dosage of the bactericidal agent is calculated according to the following formula:

wherein, L is the addition amount of the dispersion corrosion inhibitor or the scale inhibition and dispersion agent, N1 is a concentration value of the medicament, the concentration value of the medicament is 15-20mg/L, and N2 is a water amount value newly supplemented in the water storage tank.

7. The corrosion prevention method for the alkylation purification fractionation system cold exchanger device according to claim 6, wherein the bactericide is a solid chlorine bactericide.

Technical Field

The invention relates to the technical field of alkylation, in particular to an anti-corrosion system and method for cold exchange equipment of an alkylation purification fractionation system.

Background

A fractionation system of an alkylation device mainly adopts a rectification principle to separate reaction products to obtain products of carbon five, carbon three, isooctane, isobutane and normal butane. The top of the fractionating system is cooled by wet air cooling, and the large-area corrosion of the tube bundle can be caused by metal ions, sludge, salt and microorganisms, so that the long-period stable operation of the device is seriously influenced.

At present, the total amount of the tube bundles of a single air cooler is about 1313, and in the using process, the tube bundle leakage phenomenon begins to occur after the air cooler is used for 26 months, and in addition, the tube bundle leakage phenomenon commonly occurs in a plurality of air coolers, and the corrosion failure is a common event.

The analysis of the failure reasons mainly comprises the following steps: 1. environmental factors: along the coast, the air humidity is more than 80 percent for a long time, and the CL ion content is high; 2. the circulating cooling water has poor quality, contains a large amount of calcium and magnesium ions and cannot discharge pollution in time. The corrosion mechanism is electrochemical corrosion under the scale caused by oxygen concentration difference, the corrosion environment under the scale is deteriorated due to the scale, a zinc coating layer cannot reach the designed service life and is corroded too early, then the heat exchange tube matrix is corroded, and finally the air cooling effect is reduced or even loses efficacy.

Disclosure of Invention

The invention provides an anti-corrosion system and method for cold exchange equipment of an alkylation purification fractionation system, which are used for avoiding the defects in the prior art and prolonging the service life of an air cooler.

The technical scheme adopted by the invention for solving the technical problems is as follows: an alkylation purification fractionation system cold exchange equipment corrosion prevention system, comprising:

the medicine storage unit comprises medicine storage barrels and stirring mechanisms, the three medicine storage barrels are used for storing different medicines respectively, each stirring mechanism comprises a motor and a stirring paddle, the stirring paddles extend into the medicine storage barrels and extend to the middle lower parts of the medicine storage barrels, and the medicine storage barrels are provided with medicine liquid feeding pipes and water inlet pipes; the water storage unit comprises a water storage tank and a stirring mechanism arranged in the water storage tank;

carry the unit, carry the unit and include discharging pipe, connecting pipe, send pencil, blow off pipe and blowdown groove, the discharging pipe all sets up in storage medicine bucket below and with store up the medicine bucket and be linked together, it is three the blow off pipe on the storage medicine bucket is linked together and extends to the blowdown groove, is provided with the connecting pipe between the discharging pipe on two arbitrary storage medicine buckets, connecting pipe below intercommunication is provided with three pencil that send, send the pencil to extend to the storage water tank and be linked together with the storage water tank, discharging pipe on the surplus storage medicine bucket directly extends to the storage water tank and is linked together with the storage water tank.

In several embodiments, the medicine feeding pipe is provided with an electric control valve and a metering pump, and the discharge pipe communicated with the water storage tank is also provided with an electric control valve and a metering pump.

In several embodiments, the stirring rake includes (mixing) shaft, stirring head and stirring vane, the (mixing) shaft is connected with the motor, the stirring head sets up on the (mixing) shaft, and five at least stirring vane evenly encircle and set up on the stirring head, stirring vane is last to have seted up a plurality of holes of permeating water.

In several embodiments, the storage water tank includes box, case lid, diversion plate and buffer board, the box top surface has the opening, the case lid is used for covering box and box between separable, two diversion plate sets up in the box, there is the clearance that supplies liquid to pass through between the bottom of diversion plate and box, diversion plate separates the box and is three medicine feeding region, it is corresponding with three medicine feeding pipe and a discharging pipe to advance medicine region, three the buffer board is rotatable setting respectively at the top of diversion plate and the top and the downward sloping of box one side, be provided with the elastomer between buffer board and the diversion plate that is connected, the box.

In several embodiments, the support legs are disposed below the case, the backing plate is disposed below the support, and a gap for accommodating the motor is formed between the case and the backing plate.

The invention also provides an alkylation purification fractionation system cold exchange equipment corrosion prevention method adopting the system, which comprises the following steps:

the method comprises the following steps: preparing medicaments, wherein the medicaments comprise a dispersion corrosion inhibitor, a scale inhibition dispersant and a bactericide, quantitative dispersion corrosion inhibitor, scale inhibition dispersant and bactericide are respectively fed into a medicament storage barrel through a liquid medicament feeding pipe, and quantitative industrial water or tap water is fed into the medicament storage barrel through a water inlet pipe to prepare the three medicaments so as to form a dispersion corrosion inhibitor medicament, a scale inhibition dispersion medicament and a bactericide;

step two: controlling the medicament in the medicament storage barrel to be sent into the water storage tank through the discharge pipe and the medicament feeding pipe, wherein the dispersed corrosion-inhibiting medicament and the scale-inhibiting dispersed medicament can be respectively sent into the water storage tank through the two medicament feeding pipes or simultaneously sent into the water storage tank through the same medicament feeding pipe, and the sterilizing medicament is sent into the water storage tank through the discharge pipe;

wherein, the dosage of the dispersion corrosion inhibitor and the scale inhibition and dispersion agent is calculated according to the following formula:

wherein G is the addition amount of a dispersion corrosion inhibitor or a scale inhibition and dispersion agent, C1 is a control concentration value, the control concentration value is 20-40mg/L, C2 is the value of newly supplemented water in a water storage tank, and K is the concentration multiple;

wherein, the dosage of the bactericidal agent is calculated according to the following formula:

wherein, L is the addition amount of the dispersion corrosion inhibitor or the scale inhibition and dispersion agent, N1 is a concentration value of the medicament, the concentration value of the medicament is 15-20mg/L, and N2 is a water amount value newly supplemented in the water storage tank.

In several embodiments, the biocide is a solid chlorine biocide.

The invention adopts a dispersion corrosion inhibitor, a scale inhibition dispersant and a solid chlorine bactericide as treatment agents, the dispersion corrosion inhibitor is composed of a multifunctional polymer and zinc salt, and zinc is used as a cathode type preservative. The polymer can capture and disperse calcium carbonate crystals through the unique bridging effect of the polymer, and can control the thickness of a formed film; by the scale inhibition and dispersion agent, the divalent metal ions in the water are chelated, and the scale formation and deposition of the divalent metal ions are prevented; the chlorine is released after the solid chlorine bactericide is dissolved in water, the chlorine reacts quickly when meeting water to generate HCLO, the HCLO can penetrate through the wall of the bacteria, and enzymes in the bacteria are destroyed through oxidation to kill the bacteria; thereby realizing the improvement of water quality.

Through the medicine storage unit, the structure of conveying unit and water storage unit, realize the ration replenishment of various medicaments, keep medicament concentration in the water storage unit within the numerical value of demand, both can get into the water storage tank simultaneously or respectively with dirt dispersion agent by control dispersion corrosion inhibitor simultaneously, because the quantity of both tends to the same, get into the water storage tank again simultaneously after both mixability from this, mix in advance, solid chlorine bactericide then the quantity has the difference, adopt an independent pipeline to carry from this, can avoid unnecessary chlorine to pass through the same pipeline loss to other two medicine storage barrels simultaneously.

Therefore, the invention can improve the water quality of the water for the air cooler, avoid the corrosion of the pipeline and further prolong the service life of the air cooler.

Drawings

The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not to be considered limiting of the scope of the present disclosure.

FIG. 1 schematically illustrates the structure of an anti-corrosion system in one embodiment;

FIG. 2 schematically illustrates the overall structure of the paddle of FIG. 1;

FIG. 3 schematically illustrates the overall structure of the storage tank of FIG. 1;

fig. 4 schematically shows the internal structure of the water storage tank of fig. 3 with the cover removed.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention.

Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of the present invention.

The terminology used herein is for the purpose of describing embodiments only and is not intended to be limiting and/or limiting of the invention.

For example, expressions such as "in a certain direction", "along a certain direction", "parallel", "orthogonal", "center", "relative", "front-back-left-right" and the like indicate relative or absolute arrangements, and indicate not only such arrangements in a strict sense but also a state of being relatively displaced with a tolerance or an angle or a distance to the extent that the same function can be obtained.

As shown in fig. 1-4, the anti-corrosion system for the cold exchange equipment of the alkylation purification fractionation system mainly comprises a drug storage unit, a water storage unit and a conveying unit, wherein the drug storage unit is used for configuring and storing the drug, the conveying unit is used for conveying the drug, the water storage unit is used for storing cooling water and mixing the drug, and then the cooling water and the drug are pumped to an air cooler for use.

Specifically, store up the medicine unit and include medicine storage barrel 110 and rabbling mechanism, it is three medicine storage barrel 110 is used for storing different medicaments respectively, the rabbling mechanism includes motor 120 and stirring rake 130, stirring rake 130 stretches into in the medicine storage barrel 110 and extends to medicine storage barrel 110 middle and lower part, be provided with liquid medicine inlet pipe 111 and inlet tube 112 on medicine storage barrel 110, all be provided with the valve at liquid medicine inlet pipe 111 and inlet tube 112 and control the switching.

Wherein, the conveying unit includes discharging pipe 310, connecting pipe 320, send medicine pipe 330, blow off pipe 340 and blowdown groove 350, discharging pipe 310 all sets up in storage medicine bucket 110 below and is linked together with storage medicine bucket 110 with blow off pipe 340, and is three blow off pipe 340 on the storage medicine bucket 110 is linked together and extends to blowdown groove 350, is provided with connecting pipe 320 between the discharging pipe 310 on two arbitrary storage medicine buckets 110, the intercommunication is provided with three medicine pipe 330 that send below the connecting pipe 320, send medicine pipe 330 to extend to storage water tank 210 and be linked together with storage water tank 210, and discharging pipe 310 on the remaining storage medicine bucket 110 directly extends to storage water tank 210 and is linked together with storage water tank 210.

Wherein, the drug delivery pipe 330 is provided with an electric control valve 331 and a metering pump 332, and the discharge pipe 310 communicated with the water storage tank 210 is also provided with an electric control valve 331 and a metering pump 332.

Simultaneously, stirring rake 130 includes (mixing) shaft 131, stirring head 132 and stirring vane 133, (mixing) shaft 131 is connected with motor 120, stirring head 132 sets up on (mixing) shaft 131, and five at least stirring vane 133 evenly encircle the setting on stirring head 132, stirring vane 133 is last to have seted up a plurality of holes 1331 of permeating water, and the hole 1331 of permeating water can adopt polygonal structure such as circular, rhombus, supplies water and sees through, reduces the impact to the water among the stirring process, realizes gentle stable stirring process.

Specifically, the water storage unit comprises a water storage tank 210 and a stirring mechanism arranged in the water storage tank 210, the water storage tank 210 comprises a tank body 211, a tank cover 212, a water diversion plate 213 and a buffer plate 214, the top surface of the case body 211 has an opening, the case cover 212 is used to cover the case body 211 and is separable from the case body 211, two water diversion plates 213 are provided in the case body 211, a gap for liquid to pass through is formed between the water diversion plate 213 and the bottom of the box body 211, the water diversion plate 213 divides the box body 211 into three medicine feeding areas, the medicine feeding areas correspond to the three medicine feeding pipes 330 and one discharge pipe 310, taking a left-to-right example, the two leftmost drug delivery tubes 330 are located above the first leftmost drug intake area, the third drug delivery tube is located above the second leftmost drug intake area, and the discharge tube 310 is located above the third leftmost drug intake area.

It is three the rotatable setting of buffer board 214 is respectively at the top of dividing board 213 and the top and the downward sloping of box 211 one side, be provided with the elastomer between buffer board 214 and the water diversion board 213 that is connected, the box 211, realize rotating through the hinge between buffer board and water diversion board, the box 211 and be connected to slope at its bottom and set up an elastic component, like the spring, realize the support to the buffer board, make it keep at the contained angle of controlling 60 when no external force, strike on the buffer board when the medicament adds, realize the buffering, improve the mixed flow effect simultaneously.

Meanwhile, four support legs 215 are arranged at four corners of the lower portion of the box body 211, a backing plate 216 is arranged below the support legs 215, a gap for accommodating the motor 120 is formed between the box body 211 and the backing plate 216, the total number of the three motors is three, and stirring paddles connected with the motors are located in three medicine feeding areas and are close to the bottom of the box body.

The anti-corrosion method in the embodiment mainly comprises the following steps:

the method comprises the following steps: preparing medicaments, wherein the medicaments comprise a dispersion corrosion inhibitor, a scale inhibition dispersant and a bactericide, quantitative dispersion corrosion inhibitor, scale inhibition dispersant and bactericide are respectively fed into the medicine storage barrel 110 through the liquid medicine feed pipe 111, and quantitative industrial water or tap water is fed into the medicine storage barrel 110 through the water inlet pipe 112 to prepare the three medicaments to form a dispersion corrosion inhibitor medicament, a scale inhibition dispersion medicament and a bactericide;

step two: controlling the medicament in the medicament storage barrel 110 to be delivered into the water storage tank 210 through the discharge pipe 310 and the medicament delivery pipe 330, wherein the dispersed corrosion-inhibiting medicament and the scale-inhibiting dispersed medicament can be delivered into the water storage tank 210 through two medicament delivery pipes 330 respectively, or delivered into the water storage tank 210 through the same medicament delivery pipe 330 at the same time, and the sterilizing medicament is delivered into the water storage tank 210 through one discharge pipe 310;

wherein, the dosage of the dispersion corrosion inhibitor and the scale inhibition and dispersion agent is calculated according to the following formula:

wherein G is the addition amount of a dispersion corrosion inhibitor or a scale inhibition and dispersion agent, C1 is a control concentration value, the control concentration value is 20-40mg/L, C2 is the water amount value newly supplemented in the water storage tank 210, and K is the concentration multiple;

wherein, the dosage of the bactericidal agent is calculated according to the following formula:

wherein, L is the addition amount of the dispersion corrosion inhibitor or the scale inhibition and dispersion agent, N1 is a concentration value of the medicament, the concentration value of the medicament is 15-20mg/L, and N2 is a water amount value newly supplemented in the water storage tank 210.

The bactericide is a solid chlorine bactericide, and the product model is HP-502; the dispersing corrosion inhibitor adopts HP-381A; the scale inhibition and dispersion agent adopts HP-381C, and three medicaments are all purchased from Shanghai Gaossen Water treatment Co.

Usually, HP-502 is added once every 2-3 days, and can be added once every 1-2 days when the microorganisms are seriously propagated in summer.

The carbon structural steels Q235 and 304 stainless steel are used as the test piece materials, and different examples are combined to soak the test piece, so as to obtain the experimental data shown in the following table 1:

TABLE 1

Wherein, the comparison example 1 is pure tap water, the comparison example 2 is the medicament of HP-502, the comparison example 3 is HP-502+ HP-381A, the comparison example 1 is HP-502+ HP-381A + HP-381C, it can be known from the table that after the three medicaments of HP-502+ HP-381A + HP-381C are added, the corrosion rate is greatly reduced.

The present examples, illustrated embodiments and specific forms of the invention have been shown and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character. The description of a particular feature in one embodiment does not imply that those particular feature must be limited to that one embodiment. Features of one embodiment may be used in combination with features of other embodiments, as would be understood by one of ordinary skill in the art, whether or not explicitly so stated. Exemplary embodiments have been shown and described, and all changes and modifications that come within the spirit of the invention are desired to be protected.