CN114632775A - Chemical agent tank cleaning method - Google Patents

Chemical agent tank cleaning method Download PDF

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Publication number
CN114632775A
CN114632775A CN202210278890.7A CN202210278890A CN114632775A CN 114632775 A CN114632775 A CN 114632775A CN 202210278890 A CN202210278890 A CN 202210278890A CN 114632775 A CN114632775 A CN 114632775A
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China
Prior art keywords
tank
medicament
cleaning method
chemical
motor
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CN202210278890.7A
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Chinese (zh)
Inventor
石华前
黄孟
孙爱平
邵显华
田德道
孙伶俐
张颖
颜万鑫
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CNOOC Energy Technology and Services Ltd
CNOOC Tianjin Oilfield Chemical Co Ltd
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CNOOC Energy Technology and Services Ltd
CNOOC Tianjin Oilfield Chemical Co Ltd
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Priority to CN202210278890.7A priority Critical patent/CN114632775A/en
Publication of CN114632775A publication Critical patent/CN114632775A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mixers Of The Rotary Stirring Type (AREA)

Abstract

The invention provides a chemical agent tank cleaning method, which comprises the steps of starting a motor, enabling a movable impeller to rotate under the driving of the motor, further enabling water in an agent tank or an agent barrel to be stirred in the agent tank or the agent barrel, continuously dissolving polyacrylamide in a water body in the stirring process, simultaneously adding a Fenton reagent, degrading polyacrylamide by the Fenton reagent in the water body, continuously adding the Fenton reagent until polyacrylamide emulsion remained in the tank body is oxidized and degraded, enabling tank cleaning wastewater to have no viscosity basically, cleaning the tank body, and finally pouring the tank cleaning wastewater out for next treatment. The method is characterized in that a small amount of polyacrylamide emulsion remained in the tank body is subjected to oxidative degradation by means of an advanced oxidation technology, the tank body is quickly and effectively cleaned, the tank body is recycled, COD (chemical oxygen demand) of the wastewater can be reduced to a certain extent, and the pressure of the next step of wastewater treatment is reduced.

Description

Chemical agent tank cleaning method
Technical Field
The invention relates to the technical field of pharmaceutical chemicals, in particular to a chemical agent tank cleaning method.
Background
The oil extraction auxiliary agent factory produces a polyacrylamide emulsion product which is 1m3The IBC plastic tank is stored and transported, and after the product is poured into the tank, a large amount of 1m3The IBC plastic tank(s) of (1 m) is (are) produced, the tank(s) belong to hazardous chemicals, cannot be discarded at will, needs to be handled by professional environmental protection companies, and needs to pay a certain fee3The IBC canister of (a) is approximately 700 dollars, so disposal and re-purchase of the canister will incur significant costs. In view of this, it is considered to clean and recycle the tank. The conventional cleaning method is rinsing with a large amount of water. The polyacrylamide emulsion becomes viscous when meeting water, is slowly cleaned, and generates a large amount of viscous wastewater in the washing process, and the viscous wastewater can block a drainage pipeline and cause great difficulty in the next step of wastewater treatment. Therefore, in order to recycle the chemical agent tank, a new cleaning method is urgently needed to be found, the chemical agent tank is cleaned, and the generation of waste water is reduced.
Disclosure of Invention
The invention overcomes the defects in the prior art, the problems that the prior medicament tank is difficult to clean and a large amount of viscous wastewater is generated after cleaning, and provides a method for cleaning a chemical medicament tank.
The purpose of the invention is realized by the following technical scheme.
A chemical agent tank cleaning method comprises the following steps:
step 1, adding water into a medicament tank or a medicament barrel according to the amount of residual polyacrylamide emulsion in the medicament tank or the medicament barrel, adjusting the length of a telescopic stirring rod according to the volume of the water in the medicament tank or the medicament barrel so that a movable impeller is submerged below the water surface, then extending the telescopic stirring rod into the medicament tank or the medicament barrel from the opening of the medicament tank or the opening of the medicament barrel, and clamping a motor at the opening of the medicament tank or the opening of the medicament barrel through a bracket, wherein the volume of the added water is 1/5-4/5 of the total volume of the medicament tank or the medicament barrel;
and 2, starting a motor, enabling a movable impeller to rotate under the driving of the motor, further stirring water in a medicament tank or a medicament barrel in the medicament tank or the medicament barrel, wherein the stirring speed of the impeller is 60-720 r/min, continuously dissolving polyacrylamide in a water body in the stirring process, simultaneously adding a Fenton reagent, degrading the polyacrylamide by the Fenton reagent in the water body, continuously adding the Fenton reagent for 10-120 min, continuously stirring for 30-360 min after the medicament is added, until the residual polyacrylamide emulsion in the tank body is oxidized and degraded, ensuring that the tank washing wastewater has good fluidity and basically has no viscosity, finally pouring the tank washing wastewater out, cleaning the tank body, and performing next treatment on the wastewater.
In step 2, H in Fendon's reagent2O2And Fe2+The molar ratio of (A) to (B) is 2: 1-10: 1; the dosage of the Fendon reagent is 1/10 of the volume of the water body4～5/102。
The cleaning method of the chemical agent tank is suitable for the cleaning of the chemical agent tank with the volume of 0.2-2 m3And the height is less than 1.2m, and the medicament tank or the medicament barrel is cubic, cuboid or cylindrical.
The invention has the beneficial effects that: a small amount of polyacrylamide emulsion remained in the tank body is oxidized and degraded, so that the tank body is quickly and effectively cleaned and recycled; in addition, the COD of the wastewater is reduced to a certain degree, and the pressure of the next wastewater treatment is relieved.
Drawings
FIG. 1 is a schematic diagram of the construction of the washer blender of the present invention;
FIG. 2 is a schematic view of the construction of a canister of medicament to be cleaned;
FIG. 3 is a schematic view of a chemical cartridge to be cleaned;
in the figure: 1 is the motor, 2 is the support, and 3 is the power cord, and 4 are flexible puddler, and 5 are movable impeller, and 6 are that the medicament jar is uncovered, and 7 are that the medicament bucket is uncovered.
For a person skilled in the art, other relevant figures can be obtained from the above figures without inventive effort.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples.
We tested the amount of polyacrylamide dissolved and its viscosity before washing and the results are shown in table 1:
table 1: polyacrylamide dissolution and viscosity (20 ℃ C.)
Figure BDA0003557285440000021
Figure BDA0003557285440000031
As can be seen from Table 1, the viscosity of the paint-4 cup gradually increases as the amount of the polyacrylamide dissolved increases. The high-viscosity liquid has poor fluidity and has great influence on the sewage treatment process, and the liquid has better fluidity when the liquid is coated in a cup of 4 within 25 seconds (20 ℃). The Fendon reagent can effectively degrade polyacrylamide, and long-chain polyacrylamide molecules are broken into small molecular structure bodies under the oxidation action of the Fendon reagent, so that the liquid viscosity is reduced. The following examples were carried out from 3 cases.
The first embodiment is as follows:
as shown in fig. 1, the cleaning agitator comprises a movable impeller 5, a telescopic agitator arm 4, a support 2, a power line 3 and a motor 1, wherein an output shaft of the motor 1 is connected with the head end of the telescopic agitator arm 4, the movable impeller 5 is installed at the tail end of the telescopic agitator arm 4, the supports 2 are arranged on the outer walls of the two sides of the motor 1, the support 2 can be used for clamping the cleaning agitator at the opening of a medicament tank or the opening of a medicament barrel, and the motor 1 is connected with the power supply through the power line 3.
A chemical agent tank cleaning method comprises the following steps:
step 1, to 1m3Amount of polyacrylamide emulsion remaining in the drug canister (shown in FIG. 2) 300L of water was added thereto according to 1m3The length of the telescopic stirring rod 4 is adjusted according to the water volume in the medicament tank so that the movable impeller 5 is submerged below the water surface, and then the telescopic stirring rod 4 is arranged at the position of 1m3The opening 6 of the medicament tank extends into 1m3In the medicament tank, the motor 1 is clamped at 1m through the bracket 23The opening 6 of the medicament tank;
step 2, starting the motor, and driving the movable impeller to rotate by the motor so as to enable the impeller to rotate by 1m3The water in the medicine tank is 1m3Stirring in the medicament tank, controlling the stirring speed of an impeller of a motor at 120r/min, continuously dissolving polyacrylamide in a water body in the stirring process, and simultaneously adding 3L Fenton reagent containing 30% of H2O2And 1Kg of FeSO4Degrading polyacrylamide by Fenton reagent in water, continuously adding the Fenton reagent for 30min, and continuously stirring for 120min till 1m3The residual polyacrylamide emulsion in the medicament tank is oxidized and degraded, the viscosity of the tank washing wastewater is reduced, the viscosity of the wastewater in a coating-4 cup is measured, and the result shows that the time is 22 seconds (20 ℃), so that the requirement on the fluidity of sewage is met. And finally, pouring the tank washing wastewater, cleaning the tank body, and carrying out next treatment on the tank washing wastewater.
Example two:
as shown in fig. 1, the cleaning agitator comprises a movable impeller 5, a telescopic agitator arm 4, a support 2, a power line 3 and a motor 1, wherein an output shaft of the motor 1 is connected with the head end of the telescopic agitator arm 4, the movable impeller 5 is installed at the tail end of the telescopic agitator arm 4, the supports 2 are arranged on the outer walls of the two sides of the motor 1, the support 2 can be used for clamping the cleaning agitator at the opening of a medicament tank or the opening of a medicament barrel, and the motor 1 is connected with the power supply through the power line 3.
A chemical agent tank cleaning method comprises the following steps:
step 1, to 1m3The amount of the polyacrylamide emulsion remaining in the drug tank (shown in FIG. 2) was 500L of water according to 1m3The length of the telescopic stirring rod 4 is adjusted according to the water volume in the medicament tank so that the movable impeller 5 is submerged below the water surface, and then the telescopic stirring rod 4 is 1m from the water surface3The opening 6 of the medicament tank extends into 1m3In the medicament tank, the motor 1 is clamped at 1m through the bracket 23The opening 6 of the medicament tank;
step 2, starting the motor, and driving the movable impeller to rotate by the motor so as to enable the impeller to rotate by 1m3The water in the medicine tank is 1m3Stirring in the medicament tank, controlling the stirring speed of an impeller of a motor at 120r/min, continuously dissolving polyacrylamide in a water body in the stirring process, and simultaneously adding 4.5L Fenton reagent containing 30% of H2O2And 1.5Kg of FeSO4Degrading polyacrylamide by a Fenton reagent in a water body, continuously adding the Fenton reagent for 45min, and continuously stirring for 180min till 1m3The residual polyacrylamide emulsion in the medicament tank is oxidized and degraded, the viscosity of the tank washing wastewater is reduced, the viscosity of the wastewater is measured by coating-4 cups, and the result shows that the wastewater has 20 seconds (20 ℃) and meets the requirement of sewage fluidity. And finally, pouring the tank washing wastewater, cleaning the tank body, and carrying out next treatment on the tank washing wastewater.
Example three:
as shown in fig. 1, the cleaning and stirring machine comprises a movable impeller 5, a telescopic stirring rod 4, a support 2, a power line 3 and a motor 1, wherein an output shaft of the motor 1 is connected with the head end of the telescopic stirring rod 4, the movable impeller 5 is installed at the tail end of the telescopic stirring rod 4, the supports 2 are arranged on the outer walls of the two sides of the motor 1, the cleaning and stirring machine can be clamped at the opening of a medicament tank or the opening of a medicament barrel by utilizing the supports 2, and the motor 1 is connected with the power supply through the power line 3.
A chemical agent tank cleaning method comprises the following steps:
step 1, adding 100L of water into a 200L medicament barrel (shown in figure 3) according to the amount of residual polyacrylamide emulsion, adjusting the length of a telescopic stirring rod 4 according to the volume of the water in the 200L medicament barrel so that a movable impeller 5 is submerged below the water surface, then extending the telescopic stirring rod 4 into the 200L medicament barrel from a 200L medicament barrel opening 7, and clamping a motor 1 at the 200L medicament barrel opening 7 through a bracket 2;
step 2, starting the motor, enabling the movable impeller to rotate under the driving of the motor, further stirring water in the 200L medicament barrel, controlling the stirring speed of the impeller of the motor to be 120r/min, continuously dissolving polyacrylamide in a water body in the stirring process, and simultaneously adding 0.9L Fenton reagent containing 30% of H2O2And 0.3Kg of FeSO4Degrading polyacrylamide by a Fenton reagent in a water body, continuously adding the Fenton reagent for 45min, continuously stirring for 120min after adding is finished until polyacrylamide emulsion remained in a 200L medicament barrel is oxidized and degraded, reducing the viscosity of tank washing wastewater, measuring the viscosity of the wastewater in a cup of 4, and displaying the result as 18 seconds (20 ℃), so that the requirement of sewage fluidity is met. And finally, pouring the wastewater out, cleaning the medicament barrel, and treating the barrel-washing wastewater in the next step.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments to describe one element or feature's relationship to another element or feature as illustrated in the figures for ease of description. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The present invention has been described in detail, but the above description is only a preferred embodiment of the present invention, and is not to be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (9)

1. A chemical agent tank cleaning method is characterized in that: the method comprises the following steps:
step 1, adding water into a medicament tank or a medicament barrel according to the amount of residual polyacrylamide emulsion in the medicament tank or the medicament barrel, adjusting the length of a telescopic stirring rod according to the volume of the water in the medicament tank or the medicament barrel so as to enable a movable impeller to submerge below the water surface, then extending the telescopic stirring rod into the medicament tank or the medicament barrel from an opening of the medicament tank or the opening of the medicament barrel, and clamping a motor at the opening of the medicament tank or the opening of the medicament barrel through a bracket;
and 2, starting the motor, rotating the movable impeller under the driving of the motor, further stirring water in the medicament tank or the medicament barrel, continuously dissolving polyacrylamide in the water body in the stirring process, gradually increasing the viscosity of the water body, simultaneously adding an oxidant, degrading the polyacrylamide by the oxidant, and continuously adding the oxidant until the residual polyacrylamide emulsion in the tank body is oxidized and degraded, so that the tank washing wastewater has good fluidity and basically has no viscosity, finally pouring the tank washing wastewater out, cleaning the tank body, and treating the wastewater in the next step.
2. A chemical tank cleaning method according to claim 1, characterized in that: in the step 1, the volume of the added water is 1/5-4/5 of the total volume of the medicament tank or the medicament barrel.
3. A chemical tank cleaning method according to claim 1, characterized in that: in the step 2, the adding time of the oxidant is 10-120 min.
4. A chemical tank cleaning method according to claim 1, characterized in that: in the step 2, the stirring time of the motor is 30-360 min.
5. A chemical tank cleaning method according to claim 1, characterized in that: in the step 2, the stirring speed of the motor is 60 r/min-720 r/min.
6. A chemical tank cleaning method according to claim 1, characterized in that: in step 2, the oxidizing agent is Fendon reagent.
7. A chemical tank cleaning method according to claim 6, characterized in that: h in Fendon reagent2O2And Fe2+The molar ratio of (A) to (B) is 2: 1-10: 1; the adding mass of the Fendon reagent is 1/10 of the mass of the water body4～5/102。
8. A chemical tank cleaning method according to claim 1, characterized in that: the cleaning method of the chemical agent tank is suitable for the cleaning of the chemical agent tank with the volume of 0.2-2 m3And the height is less than 1.2 m.
9. A chemical tank cleaning method according to claim 1, characterized in that: the chemical agent tank cleaning method is suitable for cleaning chemical agent tanks or chemical agent barrels in the shape of a cube, a cuboid or a cylinder.
CN202210278890.7A 2022-03-21 2022-03-21 Chemical agent tank cleaning method Pending CN114632775A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107470291A (en) * 2017-08-22 2017-12-15 山西钢科碳材料有限公司 A kind of method and device for removing polymeric kettle interpolymer gel bridging
CN107522253A (en) * 2017-10-12 2017-12-29 黑龙江大学 A kind of method that aluminum modified red mud filtrate removes PAM in oil-field wastewater
CN110127899A (en) * 2019-05-24 2019-08-16 东北石油大学 A kind of method of modified Fenton system degradation polymer-containing sewage in oil field
CN210700073U (en) * 2019-07-24 2020-06-09 杭州得力科技股份有限公司 Acrylate adhesive production facility convenient to wash
CN213254429U (en) * 2020-09-04 2021-05-25 四川华沃德源能源科技有限公司 Polyacrylamide hydrolysis unit device
CN214982315U (en) * 2021-06-03 2021-12-03 重庆坤冠电器有限责任公司 Mix jar eventually convenient to clearance
CN215799380U (en) * 2021-09-30 2022-02-11 大厂回族自治县溢洋油脂有限公司 Refining device is used in production convenient to it is clean

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107470291A (en) * 2017-08-22 2017-12-15 山西钢科碳材料有限公司 A kind of method and device for removing polymeric kettle interpolymer gel bridging
CN107522253A (en) * 2017-10-12 2017-12-29 黑龙江大学 A kind of method that aluminum modified red mud filtrate removes PAM in oil-field wastewater
CN110127899A (en) * 2019-05-24 2019-08-16 东北石油大学 A kind of method of modified Fenton system degradation polymer-containing sewage in oil field
CN210700073U (en) * 2019-07-24 2020-06-09 杭州得力科技股份有限公司 Acrylate adhesive production facility convenient to wash
CN213254429U (en) * 2020-09-04 2021-05-25 四川华沃德源能源科技有限公司 Polyacrylamide hydrolysis unit device
CN214982315U (en) * 2021-06-03 2021-12-03 重庆坤冠电器有限责任公司 Mix jar eventually convenient to clearance
CN215799380U (en) * 2021-09-30 2022-02-11 大厂回族自治县溢洋油脂有限公司 Refining device is used in production convenient to it is clean

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