CN115975746A - Scale inhibitor for coking plant equipment and preparation method thereof - Google Patents
Scale inhibitor for coking plant equipment and preparation method thereof Download PDFInfo
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- CN115975746A CN115975746A CN202211706335.6A CN202211706335A CN115975746A CN 115975746 A CN115975746 A CN 115975746A CN 202211706335 A CN202211706335 A CN 202211706335A CN 115975746 A CN115975746 A CN 115975746A
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- 239000002455 scale inhibitor Substances 0.000 title claims abstract description 53
- 238000004939 coking Methods 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 12
- -1 amide compounds Chemical class 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000002270 dispersing agent Substances 0.000 claims abstract description 11
- 239000002122 magnetic nanoparticle Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 230000000149 penetrating effect Effects 0.000 claims abstract description 10
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 30
- 238000003756 stirring Methods 0.000 claims description 30
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 14
- YMCIVAPEOZDEGH-UHFFFAOYSA-N 5-chloro-2,3-dihydro-1h-indole Chemical group ClC1=CC=C2NCCC2=C1 YMCIVAPEOZDEGH-UHFFFAOYSA-N 0.000 claims description 13
- 239000002202 Polyethylene glycol Substances 0.000 claims description 12
- 239000000571 coke Substances 0.000 claims description 12
- 229920001223 polyethylene glycol Polymers 0.000 claims description 12
- 239000002105 nanoparticle Substances 0.000 claims description 11
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 3
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 150000001408 amides Chemical class 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000004140 cleaning Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000003814 drug Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- 239000003034 coal gas Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QIGLLCHDIZAZFE-YPKPFQOOSA-N bis(6-methylheptyl) (z)-but-2-enedioate Chemical compound CC(C)CCCCCOC(=O)\C=C/C(=O)OCCCCCC(C)C QIGLLCHDIZAZFE-YPKPFQOOSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000001990 intravenous administration Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002357 osmotic agent Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention belongs to the technical field of scale inhibitor preparation, and relates to a scale inhibitor for coking plant equipment and a preparation method thereof. The scale inhibitor is prepared from the following raw materials in percentage by mass: 30-50% of amide compounds, 30-40% of sulfone compounds, 5-8% of magnetic nano particles, 2-5% of dispersing agents, 1-3% of penetrating agents and the balance of water. According to the technical scheme provided by the invention, different components are compounded, and the purpose of efficiently removing the unit coking is achieved in an online dosing mode, so that the capacity loss caused by shutdown in the overhaul period is ensured, and the safety risk of manual cleaning is avoided.
Description
Technical Field
The invention belongs to the technical field of scale inhibitor preparation, relates to a scale inhibitor for online filling of a primary cooler and a compressor of a coke-oven plant, and particularly relates to a scale inhibitor for equipment of the coke-oven plant and a preparation method thereof.
Background
As is known in the art, the medium in a coking plant is generally dirty, and the coking phenomenon of a unit is serious. Specifically, the method comprises the following steps: in the coking process section, organic matters in coal can generate polymerization reaction at high temperature, and along with the coking coal gas is brought to the rear section process section, the temperature of a gas medium is cooled, the viscosity of the organic matters is increased rapidly and is adhered to a unit, so that the unit is coked.
According to actual research on site: coking is the most severe at the primary cooler and the compressor. Specifically, the method comprises the following steps: tar at the primary cooler is accumulated, so that the temperature of coke oven gas cannot be effectively cooled, and the recovery rate of tar at the electric catching process section is influenced; the tar accumulation at the compressor causes the vibration value of the unit to rise, the operation is unstable and even the unit is stuck, and the field safety production is seriously influenced. At present, the traditional cleaning mode (sand blasting and calcining) has a long period, and needs to be stopped for manual cleaning, so that the capacity rapidly slides down during cleaning, and because the coal gas of a coke-oven plant contains rich hydrogen (colorless, tasteless, flammable and explosive), potential safety hazards exist in the manual operation process.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a scale inhibitor for equipment of a coke-oven plant and a preparation method thereof, so that the defects of the prior art are overcome, the aim of efficiently removing unit coking is fulfilled by adding medicaments on line, and the capacity loss caused by shutdown can be avoided.
The purpose of the invention is realized by the following technical scheme:
the scale inhibitor for the equipment of the coke-oven plant comprises the following raw materials in percentage by mass: 30-50% of amide compounds, 30-40% of sulfone compounds, 5-8% of magnetic nano particles, 2-5% of dispersing agents, 1-3% of penetrating agents and the balance of water.
Further, the sulfone compound is dimethyl sulfoxide.
Further, the amide compound is at least one of N-N dimethylformamide or N-N dimethylacetamide.
Further, the magnetic nanoparticles are Fe 3 O 4 Nano particles with the particle size less than or equal to 100nm.
Further, the dispersing agent is polyethylene glycol.
Further, the penetrating agent is diisooctyl maleate sulfonate.
Furthermore, the concentration of the scale inhibitor added into the coking gas medium is 100-400 ml/(10) 4 m 3 )。
In addition, the invention also provides a preparation method of the scale inhibitor for the coke-oven plant equipment, which comprises the following steps:
s1, adding 30-50% of amide compounds in mass percent into quantitative water, and stirring at room temperature until the amide compounds are completely and uniformly mixed to form a solution A;
s2, adding 30-40% of sulfone compound in percentage by mass into the solution A, and stirring for 10-15min at room temperature to obtain a solution B;
s3, adding a dispersing agent with the mass percent of 2-5% into the solution B, and stirring for 15-25min at room temperature to obtain a solution C;
s4, adding 5-8% by mass of magnetic nanoparticles into the solution C, and stirring at room temperature for 10-15min to obtain a solution D;
and S5, adding 1-3% of penetrating agent by mass into the solution D, and stirring at room temperature for 30-40min to fully dissolve the penetrating agent to form the scale inhibitor.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the scale inhibitor can achieve the aim of efficiently treating coking on line (without shutdown) by compounding different components, and comprises the following specific components: (1) more agents for dispersing and dissolving the coked materials can be carried to the interface of the coking unit by introducing the magnetic nano materials, and with the continuous filling of the agents, an adsorption film containing the agents can be formed on the interface of the unit due to magnetic adsorption, so that the aggregation and the growth of the coked materials are inhibited to the maximum extent. (2) The innovative application of the composite performance of the dimethyl sulfoxide not only can efficiently treat coked materials together with an amide compound, but also can be used as a dispersing agent to ensure that the magnetic nano material is more uniformly dispersed in a liquid medicament together with polyethylene glycol so as to be uniformly adsorbed on a unit interface in the subsequent process. (3) The use of the penetrant enables the coke formed on the interface in the unit to carry the medicament to the inside of the coke along with the penetrant, so as to achieve the purpose of thoroughly treating the coke. The scale inhibitor utilizes a plurality of medicaments to perform synergistic action on the whole, can ensure the long-term stable operation of equipment, and obviously improves the income of enterprises.
Detailed Description
The exemplary embodiments will be described herein in detail, and the embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of products, methods consistent with certain aspects of the invention, as detailed in the appended claims.
The invention provides a scale inhibitor for equipment of a coke-oven plant, which comprises the following raw materials in percentage by mass: 30-50% of amide compounds, 30-40% of sulfone compounds, 5-8% of magnetic nanoparticles, 2-5% of dispersing agents, 1-3% of penetrating agents and the balance of water. Wherein the sulfone compound is dimethyl sulfoxide.
The invention can form more effective contact areas between the amide compounds and dimethyl sulfoxide for treating the coking materials and the coking materials by synchronously carrying the coke oven gas and adsorbing the magnetic nanoparticles, and the adopted raw materials are low in toxicity and environment-friendly. Especially the simultaneous utilization of the double functions of dimethyl sulfoxide: dimethyl sulfoxide is used for dispersing magnetic nanoparticles on the one hand, and is used for dispersing agents and solvents with excellent coking on the other hand. In addition, the synergistic use of the osmotic agent enables the agent to deeply process the coke that has agglomerated into the cake.
Further, the use concentration of the scale inhibitor for online filling of the primary cooler and the compressor of the coke-oven plant is 100-400 ml/(10) 4 m 3 ) The scale inhibitor is in a liquid state, and the dosing method is to inject the scale inhibitor into a pipeline in an intravenous drip mode by using a metering pump.
According to the analysis, the magnetic nano-particle adsorption and coke oven gas carrying agent provided by the invention can be used for carrying more agents, the action efficiency of the agents and the coke can be obviously improved, and the effect of the agents can be maximized through the synergistic use of the dispersing agent and the penetrating agent. Therefore, the scale inhibitor provided by the invention is composed of a plurality of raw materials together, and the expected scale inhibition effect cannot be achieved only by using one of the raw materials alone.
In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the following examples.
Example 1
The embodiment provides a scale inhibitor for online filling of a primary cooler and a compressor of a coking plant, which is prepared from the following raw materials in percentage by mass: 20% of each of N-dimethylformamide and N-dimethylacetamide, 30% of dimethyl sulfoxide and Fe 3 O 4 8 percent of nano particles, 5 percent of polyethylene glycol, 3 percent of maleic acid diisooctyl ester sulfonate and the balance of water, wherein the sum of the mass percentages of the components is 100 percent.
In addition, the embodiment also provides a preparation method of the scale inhibitor for online filling of the primary cooler and the compressor of the coke-oven plant, which specifically comprises the following steps:
s1, adding 20% by mass of N-N dimethylformamide and 20% by mass of N-N dimethylacetamide into quantitative water, and stirring at room temperature until the N-N dimethylformamide and the N-N dimethylacetamide are completely and uniformly mixed to form a solution A;
s2, adding 30% by mass of dimethyl sulfoxide into the solution A, and stirring for 15min at room temperature to obtain a solution B;
s3, adding 5% by mass of polyethylene glycol into the solution B, and stirring at room temperature for 20min to obtain a solution C;
s4, adding 8 mass percent of Fe into the solution C 3 O 4 Stirring the nano particles at room temperature for 10min to obtain a solution D;
and S5, adding 3% by mass of diisooctyl maleate sulfonate into the solution D, and stirring at room temperature for 30min to fully dissolve the diisooctyl maleate sulfonate to form the scale inhibitor.
When the scale inhibitor is applied to the process section of the on-site primary cooler unit, because a large amount of coked materials exist in the process section of the on-site primary cooler unit, 400 ml/(10 ml) of the scale inhibitor is added 4 m 3 ) The scale inhibitor with the concentration is added into the coke oven gas medium for 3 months, the heat exchange efficiency of the primary cooler is gradually normal, and the low temperature required by rear-end electric capture can be met.
Example 2
The embodiment provides a scale inhibitor for online filling of a primary cooler and a compressor of a coking plant, which is prepared from the following raw materials in percentage by mass: 30% of N-N dimethylformamide, 40% of dimethyl sulfoxide and Fe 3 O 4 6% of nano particles, 4% of polyethylene glycol, 2% of diisooctyl maleate sulfonate and the balance of water, wherein the sum of the mass percentages of the components is 100%.
In addition, the embodiment also provides a preparation method of the scale inhibitor for online filling of the primary cooler and the compressor of the coke-oven plant, which specifically comprises the following steps:
s1, adding 30% by mass of N-N dimethylformamide into quantitative water, and stirring at room temperature until the N-N dimethylformamide is completely and uniformly mixed to form a solution A;
s2, adding dimethyl sulfoxide with the mass percent of 40% into the solution A, and stirring for 10min at room temperature to obtain a solution B;
s3, adding 4% by mass of polyethylene glycol into the solution B, and stirring at room temperature for 15min to obtain a solution C;
s4, adding 6 mass percent of Fe into the solution C 3 O 4 Stirring the nano particles at room temperature for 10min to obtain a solution D;
s5, adding 2% by mass of diisooctyl maleate sulfonate into the solution D, and stirring at room temperature for 40min to fully dissolve the diisooctyl maleate sulfonate to form the scale inhibitor.
When the scale inhibitor is applied to an on-site compressor unit section, 200 ml/(10 ml) is added due to the existence of a large amount of coked materials in the on-site compressor unit section 4 m 3 ) Adding the scale inhibitor with the concentration into the coke oven gas medium for continuous filling (filling all the time if the field equipment is not stopped), gradually recovering to be stable after the vibration value of the compressor is 1 month, and then according to the formula of 100-150 ml/(10) 4 m 3 ) And (4) filling concentration, and keeping stable operation of the unit.
Example 3
The embodiment provides a scale inhibitor for online filling of a primary cooler and a compressor of a coking plant, which comprises the following components in percentage by massThe raw material components of (A) are as follows: n-dimethylformamide 50%, dimethyl sulfoxide 35%, fe 3 O 4 5% of nano particles, 2% of polyethylene glycol, 1% of diisooctyl maleate sulfonate and the balance of water, wherein the sum of the mass percentages of the components is 100%.
In addition, the embodiment also provides a preparation method of the scale inhibitor for online filling of the primary cooler and the compressor of the coke-oven plant, which specifically comprises the following steps:
s1, adding 50% by mass of N-N dimethylformamide into quantitative water, and stirring at room temperature until the N-N dimethylformamide is completely and uniformly mixed to form a solution A;
s2, adding 35% by mass of dimethyl sulfoxide into the solution A, and stirring at room temperature for 10min to obtain a solution B;
s3, adding 2% by mass of polyethylene glycol into the solution B, and stirring at room temperature for 25min to obtain a solution C;
s4, adding 5% by mass of Fe into the solution C 3 O 4 Stirring the nano particles at room temperature for 10min to obtain a solution D;
and S5, adding 1% by mass of diisooctyl maleate sulfonate into the solution D, and stirring at room temperature for 40min to fully dissolve the diisooctyl maleate sulfonate to form the scale inhibitor.
The scale inhibitor is applied to the initial stage of putting a new unit into service, and is respectively 100 ml/(10 ml) at the front ends of a primary cooler and a compressor 4 m 3 ) And adding the scale inhibitor into the solution according to the concentration, and keeping the unit to stably operate all the time in the maintenance period.
Comparative example
The experimental example provides a scale inhibitor for online filling of a primary cooler and a compressor of a coke-oven plant, which is prepared from the following raw materials in percentage by mass: N-N dimethylformamide 20%, dimethyl sulfoxide 35%, fe 3 O 4 3% of nano particles, 6% of polyethylene glycol, 4% of diisooctyl maleate sulfonate and the balance of water, wherein the sum of the mass percentages of the components is 100%.
In addition, the experimental example also provides a preparation method of the scale inhibitor for online filling of the primary cooler and the compressor of the coke-oven plant, which comprises the following steps:
s1, adding 20% by mass of N-N dimethylformamide into quantitative water, and stirring at room temperature until the N-N dimethylformamide and the quantitative water are completely and uniformly mixed to form a solution A;
s2, adding 35% by mass of dimethyl sulfoxide into the solution A, and stirring at room temperature for 10min to obtain a solution B;
s3, adding 6% by mass of polyethylene glycol into the solution B, and stirring at constant temperature for 20min to obtain a solution C;
s4, adding 4% by mass of Fe into the solution C 3 O 4 Stirring the nano particles for 15min at constant temperature to obtain a solution D;
s5, adding 1% by mass of diisooctyl maleate sulfonate into the solution D, and stirring at constant temperature for 35min to fully dissolve the diisooctyl maleate sulfonate to form the scale inhibitor.
The scale inhibitor is applied to the initial stage of putting a new unit, and is respectively 150 ml/(10 ml) at the front ends of a primary cooler and a compressor 4 m 3 ) Adding the scale inhibitor into the mixture in a concentration, and opening the unit after half a year to cause severe coking.
As can be seen by comparing examples 1 to 3 with comparative example, since the mass percentage of N-N dimethylformamide in the comparative example is 20%, it is not within the range of 30 to 50% as defined in the present invention, and Fe 3 O 4 The mass percent of the nano particles is 3 percent and is not in the range of 5-8 percent defined by the invention, the mass percent of the polyethylene glycol is 6 percent and exceeds the maximum range of 5 percent defined by the invention, the mass percent of the maleic acid diisooctyl sulfonate is 4 percent and exceeds the maximum range of 5 percent defined by the invention, and after the scale inhibitor is applied to a new unit, the filling mode and the time are the same as those of the examples 1-3, but the unit has serious coking after being opened for half a year, and the technical effect which can be achieved by the invention can not be achieved at all. Therefore, the scale inhibitor for the equipment of the coke-oven plant can achieve the aim of efficiently removing the coking of the unit in an online filling mode, and can avoid the capacity loss caused by shutdown.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention.
It is to be understood that the present invention is not limited to what has been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (8)
1. The scale inhibitor for the equipment of the coke-oven plant is characterized by comprising the following raw materials in percentage by mass: 30-50% of amide compounds, 30-40% of sulfone compounds, 5-8% of magnetic nano particles, 2-5% of dispersing agents, 1-3% of penetrating agents and the balance of water.
2. The scale inhibitor for the coke-oven plant equipment as claimed in claim 1, wherein the sulfone compound is dimethyl sulfoxide.
3. The scale inhibitor for coke-oven plant equipment as claimed in claim 1, wherein the amide-based compound is at least one of N-dimethylformamide or N-dimethylacetamide.
4. The scale inhibitor for coke-oven plant equipment as claimed in claim 1, wherein the magnetic nanoparticles are Fe 3 O 4 Nano particles with the particle size less than or equal to 100nm.
5. The scale inhibitor for coke-oven plant equipment as claimed in claim 1, wherein the dispersant is polyethylene glycol.
6. The scale inhibitor for coke-oven plant equipment as claimed in claim 1, wherein the penetrant is diisooctyl maleate sulfonate.
7. Coke according to claim 1The scale inhibitor for chemical plant equipment is characterized in that the added concentration of the scale inhibitor in a coking gas medium is 100-400 ml/(10) 4 m 3 )。
8. A method for producing the scale inhibitor for coke plant equipment as claimed in any one of claims 1 to 7, characterized by comprising the steps of:
s1, adding 30-50% of amide compounds in mass percent into quantitative water, and stirring at room temperature until the amide compounds are completely and uniformly mixed to form a solution A;
s2, adding 30-40% of sulfone compound in percentage by mass into the solution A, and stirring for 10-15min at room temperature to obtain a solution B;
s3, adding a dispersing agent with the mass percent of 2-5% into the solution B, and stirring for 15-25min at room temperature to obtain a solution C;
s4, adding 5-8% by mass of magnetic nanoparticles into the solution C, and stirring at room temperature for 10-15min to obtain a solution D;
and S5, adding 1-3% of penetrating agent by mass into the solution D, and stirring at room temperature for 30-40min to fully dissolve the penetrating agent to form the scale inhibitor.
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