CN115406301A - Propylene condenser cleaning method and propylene condenser cleaning device - Google Patents
Propylene condenser cleaning method and propylene condenser cleaning device Download PDFInfo
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- CN115406301A CN115406301A CN202211072172.0A CN202211072172A CN115406301A CN 115406301 A CN115406301 A CN 115406301A CN 202211072172 A CN202211072172 A CN 202211072172A CN 115406301 A CN115406301 A CN 115406301A
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- propylene condenser
- propylene
- condenser
- cleaning
- circulating water
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- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 title claims abstract description 181
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 title claims abstract description 181
- 238000004140 cleaning Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000012459 cleaning agent Substances 0.000 claims abstract description 18
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 43
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 43
- 239000003814 drug Substances 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003795 chemical substances by application Substances 0.000 description 18
- 238000001816 cooling Methods 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 239000012071 phase Substances 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- 241000195493 Cryptophyta Species 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002455 scale inhibitor Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention provides a cleaning method and a cleaning device for a propylene condenser. The cleaning method of the propylene condenser comprises the following steps: step S1: preparing a cleaning agent; step S2: checking a propylene condenser cleaning device, and communicating the propylene condenser cleaning device with a propylene condenser; and step S3: adding a cleaning agent into a propylene condenser cleaning device, and operating the propylene condenser cleaning device; step S4; after the propylene condenser cleaning device operates for a preset time, detecting the turbidity of the circulating water of the propylene condenser, and finishing cleaning when the turbidity of the circulating water of the propylene condenser reaches a set value. The invention solves the problems that the propylene condenser in the prior art has poor cleaning effect and cannot be cleaned on line.
Description
Technical Field
The invention relates to the field of chemical production equipment, in particular to a propylene condenser cleaning method and a propylene condenser cleaning device.
Background
The propylene refrigeration process is widely applied to chemical production devices, and the process principle is that the characteristics of high boiling point and large latent heat of vaporization of propylene under the normal pressure condition are utilized, low-temperature low-pressure gas-phase propylene is compressed into high-temperature high-pressure gas-phase propylene through a compressor, the high-temperature high-pressure gas-phase propylene is changed into normal-temperature high-pressure liquid-phase propylene through circulating cooling water, the normal-temperature high-pressure liquid-phase propylene is throttled and then changed into low-temperature low-pressure liquid-phase propylene to exchange heat with a cooled medium, the low-temperature low-pressure gas-phase propylene is generated, and finally the low-temperature low-pressure gas-phase propylene returns to an inlet of the compressor to form a cooling cycle, so that the purposes of cooling are achieved.
The propylene condenser generally adopts circulating cooling water to exchange heat with propylene, after the condenser slightly leaks, the pressure of the propylene is higher than the pressure of the circulating cooling water, the propylene can be leaked into a circulating cooling water system, microorganisms in the circulating water can be propagated greatly, biological slime is generated in the tubes of the heat exchanger and covers the metal surface of the heat exchanger, a corrosion and scale inhibitor in the circulating water is prevented from acting on the metal, the tubes are simultaneously blocked, the heat exchange efficiency is reduced, corrosion occurs under the scale, more propylene can be leaked along with the aggravation of the corrosion, more biological slime is generated, and vicious circle is formed. Therefore, in the actual production process, after the propylene condenser leaks, the serious consequences of continuous reduction of the circulating water quantity of the condenser, poor cooling effect of the condenser, deterioration of the water quality of a circulating water system, high outlet pressure of a compressor and the like can be caused, finally, the device is forced to be stopped for maintenance, and the economic loss is huge.
The Chinese patent of application No. CN201420326210.5 discloses an online descaling device for an air compressor cooler, which comprises a compressor cooler and a cooler circulating water inlet and outlet pipeline, wherein the cooler circulating water inlet pipeline is connected with a descaling liquid tank, a descaling liquid feed pump is arranged at the outlet of the descaling liquid tank and is connected with a cooler circulating water outlet pipeline; the circulating water outlet of the cooler is connected with a waste liquid tank through a pipeline branch, and a waste liquid tank discharge valve is arranged on the pipeline branch. But this device is not suitable for propylene and leaks the circulating water quality deterioration treatment that leads to, can't effectively solve the problem of biological slime gathering.
The Chinese patent application No. CN201420632780.7 discloses an online descaling device without shutdown, which comprises a circulating water tank, wherein the circulating water tank is connected with a cooling water circulating system through a pipeline, and the cooling water circulating system comprises cooling equipment, a circulating water pump and heat exchange equipment which are sequentially connected through the pipeline; the inlet end of the circulating water tank is connected with the outlet end of the heat exchange equipment, and the outlet end of the circulating water tank is connected with the inlet end of the cooling equipment; a scale remover adding port and a water replenishing port are arranged in the circulating water tank, vibrators are arranged on the connecting pipelines, and the vibrators are uniformly arranged at intervals; a plurality of grid plates are arranged at two sides of the circulating water tank at intervals, and the length of each grid plate is 0.5-1 time of the distance between the two sides of the circulating water tank; the bottom of the circulating water tank is provided with a slag discharge valve. But this device is not suitable for propylene and leaks the circulating water quality deterioration treatment that leads to, can't effectively solve the problem of biological slime gathering.
The Chinese invention patent with application number CN201010200180.X proposes a method and equipment for preventing and removing scale, removing oxygen, cleaning, sterilizing and removing algae by using ultrasonic waves, which is characterized in that in a working medium loop and a cooling medium loop of thermal power generation equipment, firstly, a filter is facilitated to filter dirt, and then an ultrasonic processor is adopted to perform the treatments of preventing scale, removing oxygen, cleaning, sterilizing and removing algae on water after filtering the dirt. However, the ultrasonic processor mentioned in the method needs to continuously consume electric energy, and has higher use cost and larger investment.
The Chinese invention patent with application number CN201210060925.6 proposes an online descaling method and device for a tubular heat exchanger on the top of a shallow vacuum tower of an atmospheric and vacuum distillation device for crude oil refining, wherein the online descaling method comprises the following steps: cutting off the cooling circulating water of the tube pass of the shallow decompression tower tube type heat exchanger, and opening a valve; pumping the descaling agent in the overflow groove into the tube pass of the tube type heat exchanger through a centrifugal pump; the oil path enters the shell pass of the tube type heat exchanger through a pipeline and exchanges heat with the descaling agent in the tube type heat exchanger; the descaling agent after descaling by the shell and tube heat exchanger flows into the pipeline filter; the scale remover filtered by the pipeline filter flows back to the overflow tank for recycling. The online descaling device comprises an overflow trough, a centrifugal pump, a tube type heat exchanger and a pipeline filter. However, the method needs to temporarily stop the circulating water of the heat exchanger, so that the propylene compressor cannot operate and the purpose of online descaling cannot be realized.
Therefore, the prior art has the problems of poor cleaning effect of the propylene condenser and incapability of online cleaning.
Disclosure of Invention
The invention mainly aims to provide a cleaning method and a cleaning device for a propylene condenser, which are used for solving the problems that the cleaning effect of the propylene condenser is poor and online cleaning cannot be realized in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a propylene condenser cleaning method comprising: step S1: preparing a cleaning agent; step S2: checking a propylene condenser cleaning device, and communicating the propylene condenser cleaning device with a propylene condenser; and step S3: adding a cleaning agent into a propylene condenser cleaning device, and operating the propylene condenser cleaning device; step S4; after the propylene condenser cleaning device operates for a preset time, detecting the turbidity of the circulating water of the propylene condenser, and finishing cleaning when the turbidity of the circulating water of the propylene condenser reaches a set value.
Further, when the cleaning agent is prepared, the cleaning agent comprises sodium hypochlorite and a slime stripping agent, and the amount of the sodium hypochlorite and the slime stripping agent is calculated according to the circulating water amount of the propylene condenser.
Further, in calculating the amount of sodium hypochlorite and the slime remover, 0.05 kg of sodium hypochlorite and 0.1 kg of slime remover are required to be added per ton of circulating water.
Further, when a cleaning agent is added to the propylene condenser cleaning apparatus and the propylene condenser cleaning apparatus is operated, sodium hypochlorite is added first, and after the propylene condenser cleaning apparatus is operated for a predetermined time, a slime remover is added.
Further, when sodium hypochlorite is added into the propylene condenser cleaning device, the sodium hypochlorite is added into a medicine adding groove of the propylene condenser cleaning device, water is added for dilution to 20% of concentration, standing is carried out for preset time, an air source valve and an inlet and outlet valve of a pneumatic pump of the propylene condenser cleaning device are opened, the pneumatic pump is started, and the diluted sodium hypochlorite is discharged into the propylene condenser.
Further, after discharging the diluted sodium hypochlorite into the propylene condenser, closing an air source valve and an outlet valve of the pneumatic pump, adding the slime stripping agent into a medicine adding groove of the propylene condenser cleaning device, adding water to dilute the slime stripping agent to 20% concentration, standing for a preset time, opening the air source valve and the outlet valve of the pneumatic pump, starting the pneumatic pump and discharging the diluted slime stripping agent into the propylene condenser.
Further, after discharging the diluted slime remover to the propylene condenser, sodium hypochlorite was newly added and the propylene condenser cleaning apparatus was operated.
Further, when the turbidity of the circulating water of the propylene condenser is detected, if the turbidity of the circulating water of the propylene condenser does not reach the set value, the step S3 is executed again until the turbidity of the circulating water of the propylene condenser reaches the set value.
Further, when the propylene condenser cleaning device is communicated with the propylene condenser, the propylene condenser cleaning device is communicated with a circulating water supply line of the propylene condenser.
According to another aspect of the present invention, there is provided a propylene condenser cleaning apparatus which performs the above-described propylene condenser cleaning method, the propylene condenser cleaning apparatus including: a medicine feeding groove; the dosing groove is communicated with the pneumatic pump; the one end of medicine-adding pipeline is connected with the end of pneumatic pump far away from the medicine-adding groove, and the other end of medicine-adding pipeline is connected with propylene condenser.
By applying the technical scheme of the invention, the cleaning method of the propylene condenser comprises the following steps: step S1: preparing a cleaning agent; step S2: checking a propylene condenser cleaning device, and communicating the propylene condenser cleaning device with a propylene condenser; and step S3: adding a cleaning agent into a propylene condenser cleaning device, and operating the propylene condenser cleaning device; step S4; and after the cleaning device for the propylene condenser operates for a preset time, detecting the turbidity of the circulating water of the propylene condenser, and when the turbidity of the circulating water of the propylene condenser reaches a set value, finishing cleaning. The cleaning method of the propylene condenser solves the problem that the propylene condenser must be stopped to overhaul the heat exchanger after leakage, and the online dosing and cleaning method is used, so that the problem that the heat exchanger is blocked by scaling and has poor heat exchange effect is solved, the problem that the heat exchanger tubes are corroded under continuous scale is solved, and a foundation is laid for long-period operation of a chemical device.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a flow diagram of a propylene condenser cleaning process in accordance with one embodiment of the present invention;
FIG. 2 shows a schematic diagram of a propylene condenser cleaning apparatus in one embodiment of the present application.
Wherein the figures include the following reference numerals:
10. a medicine feeding groove; 20. a pneumatic pump; 30. a dosing line; 40. a propylene condenser.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
In order to solve the problems that a propylene condenser in the prior art is poor in cleaning effect and cannot be cleaned on line, the application provides a cleaning method and a cleaning device for the propylene condenser.
As shown in fig. 1, the cleaning method of the propylene condenser in the present application comprises: step S1: preparing a cleaning agent; step S2: checking a propylene condenser cleaning device, and communicating the propylene condenser cleaning device with a propylene condenser; and step S3: adding a cleaning agent into a propylene condenser cleaning device, and operating the propylene condenser cleaning device; step S4; after the propylene condenser cleaning device operates for a preset time, detecting the turbidity of the circulating water of the propylene condenser, and finishing cleaning when the turbidity of the circulating water of the propylene condenser reaches a set value. The cleaning method of the propylene condenser solves the problem that the heat exchanger must be stopped and overhauled after the propylene condenser leaks, and the online dosing and cleaning method is used, so that the problem that the heat exchanger is poor in heat exchange effect due to scaling and blocking of the heat exchanger is solved, the problem that the heat exchanger tubes are corroded under continuous scale is solved, and a foundation is laid for long-period operation of a chemical device.
Specifically, when the cleaning agent is prepared, the cleaning agent comprises sodium hypochlorite and slime remover, and the amount of the sodium hypochlorite and the slime remover is calculated according to the circulating water amount of the propylene condenser.
Specifically, in calculating the amount of sodium hypochlorite and the slime remover, 0.05 kg of sodium hypochlorite and 0.1 kg of the slime remover are required to be prepared per ton of circulating water.
Specifically, when a cleaning agent is added to the propylene condenser cleaning apparatus and the propylene condenser cleaning apparatus is operated, sodium hypochlorite is added first, and after the propylene condenser cleaning apparatus is operated for a predetermined time, a slime remover is added.
Specifically, when sodium hypochlorite is added into the propylene condenser cleaning device, the sodium hypochlorite is added into a dosing tank 10 of the propylene condenser cleaning device, the sodium hypochlorite is diluted to 20% concentration by adding water, the sodium hypochlorite is kept still for a preset time, an air source valve and an inlet and outlet valve of a pneumatic pump 20 of the propylene condenser cleaning device are opened, the pneumatic pump 20 is started, and the diluted sodium hypochlorite is discharged into the propylene condenser.
Specifically, after discharging the diluted sodium hypochlorite into the propylene condenser, the air source valve and the outlet valve of the pneumatic pump 20 are closed, the slime stripping agent is added into the chemical adding tank 10 of the propylene condenser cleaning device, water is added to dilute the sodium hypochlorite to 20% concentration, the sodium hypochlorite stripping agent is kept standing for a preset time, the air source valve and the outlet valve of the pneumatic pump 20 are opened, the pneumatic pump 20 is started, and the diluted slime stripping agent is discharged into the propylene condenser.
Specifically, after discharging the diluted slime remover to the propylene condenser, sodium hypochlorite was newly added and the propylene condenser cleaning apparatus was operated.
Specifically, when the turbidity of the circulating water of the propylene condenser is detected, if the turbidity of the circulating water of the propylene condenser does not reach the set value, the step S3 is executed again until the turbidity of the circulating water of the propylene condenser reaches the set value.
Specifically, when the propylene condenser cleaning device is communicated with the propylene condenser, the propylene condenser cleaning device is communicated with a circulating water supply line of the propylene condenser.
According to another aspect of the present invention, there is provided a propylene condenser cleaning apparatus, as shown in fig. 2, which performs the above-described propylene condenser cleaning method, the propylene condenser cleaning apparatus including: a dosing tank 10; the pneumatic pump 20 is communicated with the dosing groove 10; the medicine feeding device comprises a medicine feeding pipeline 30, wherein one end of the medicine feeding pipeline 30 is connected with one end, far away from the medicine feeding groove 10, of the pneumatic pump 20, and the other end of the medicine feeding pipeline 30 is connected with a propylene condenser 40.
In one embodiment of the present application, when cleaning the propylene condenser, firstly, finding the leaked propylene condenser can be comprehensively determined by the phenomena of reduced circulating water flow, reduced temperature difference of circulating water inlet and outlet, reduced temperature difference of propylene inlet and outlet of the propylene condenser, recycled water return exhaust gas-guide and spray exhaust, high outlet pressure of the propylene compressor, and the like. After the heat exchanger is determined to leak, if the heat exchanger is not processed in time, the leakage amount of the heat exchanger can be continuously increased, the flow of circulating water of the heat exchanger can be reduced by 50% in each three-month period generally, so that the outlet pressure of a propylene compressor is too high to stop for maintenance, and therefore a medicament and a dosing device need to be prepared as soon as possible.
Then required chemicals, namely sodium hypochlorite and a slime stripping agent are prepared, the dosage of the chemicals is calculated according to the circulating water quantity of the propylene condenser, 0.05 kg of sodium hypochlorite and 0.1 kg of the slime stripping agent are required to be added to each ton of water averagely, and the two chemicals are commonly used in a circulating water system and can be directly used without extra purchase.
Secondly, preparing a dosing device which mainly comprises a dosing groove 10, a pneumatic pump 20 and a dosing pipeline 30, wherein firstly, the dosing groove 10 is selected, a proper size is selected according to the dosage, the two medicaments need to be diluted to 20% and then stored in the dosing groove 10, if the circulating water amount of a propylene condenser is 500t/h, the required sodium hypochlorite and slime stripper are respectively 25kg and 50kg, and the volume of the dosing groove 10 is controlled to be 300-500L after dilution; secondly, selecting a pneumatic pump 20, namely generally selecting a pneumatic diaphragm pump with a metering function, and controlling the flow to be 0.1-0.3 t/h; thirdly, the medicine feeding pipeline 30 is selected, the material is common carbon steel, and the size of the medicine feeding pipeline is consistent with that of the propylene condenser.
Finally, the operation method is that after the medicament and the dosing device are prepared, the dosing operation can be started, and the specific implementation steps are as follows:
1. confirming that the dosing tank is cleaned, confirming that a driving air source of the pneumatic pump is connected and debugged normally, confirming that a dosing pipeline and a leaked propylene condenser circulating water supply pipeline are connected normally, and confirming that the dosing tank, the pneumatic pump and the dosing pipeline are connected normally without leakage;
2. pouring sodium hypochlorite into a dosing tank, adding water to dilute the sodium hypochlorite to 20% concentration, standing for 30 minutes, opening an air source valve and an inlet/outlet valve of a pneumatic pump, starting the pneumatic pump, adjusting the flow to about 0.1t/h, slowly adding the medicament into a circulating water supply pipeline, controlling the first dosing time to be about 2 hours, and properly adjusting the flow of the pneumatic pump according to the dosing amount;
3. after the first dosing is carried out for 30 minutes, the flow rate of the circulating water of the propylene condenser can be slowly increased, and if no flowmeter is arranged, the dosing effect can be judged through the temperature;
4. after sodium hypochlorite is added, closing an outlet valve and an air source valve of the pneumatic pump, pouring a slime stripping agent into a dosing tank, adding water to dilute the slime stripping agent to 20% of concentration, standing for 30 minutes, opening the outlet valve and the air source valve of the pneumatic pump, starting the pneumatic pump, adjusting the flow to about 0.2t/h, slowly adding the medicament into a circulating water supply pipeline, controlling the dosing time to about 2 hours, and properly adjusting the flow of the pneumatic pump according to the dosing amount;
5. after the slime stripping agent is added, the flow rate of circulating water of the propylene condenser is slowly increased;
6. after the slime stripping agent is added, repeating the second step, adding sodium hypochlorite again, and observing the change condition of the flow of the circulating water;
7. the second step to the sixth step are a dosing flow, generally dosing is carried out once every day according to the flow, continuous dosing for three days is a complete dosing flow, the turbidity of circulating backwater can be analyzed after 30 minutes of dosing is carried out every time, when the turbidity reaches more than 7, the descaling effect is good, when the turbidity is lower than 7, the dosing of sodium hypochlorite can be increased to three times or four times from two times every day, the descaling effect is enhanced, and the long-period operation of the propylene condenser can be ensured by carrying out the complete dosing flow once every month.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: according to the invention, sodium hypochlorite and a slime stripping agent are added into the circulating water supply pipeline of the propylene condenser in a guiding and spraying manner at regular intervals, so that biological slime is prevented from depositing and scaling on the metal surface of the heat exchanger, the propylene condenser is ensured not to be continuously deteriorated even if leaked, the propylene condenser can run for a long period, the propylene refrigerating device is not stopped and overhauled, and the problem of leakage of the propylene condenser is solved on line without stopping.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for cleaning a propylene condenser is characterized by comprising the following steps:
step S1: preparing a cleaning agent;
step S2: checking a propylene condenser cleaning device, and communicating the propylene condenser cleaning device with a propylene condenser;
and step S3: adding the cleaning agent into the propylene condenser cleaning device, and operating the propylene condenser cleaning device;
step S4; and after the propylene condenser cleaning device operates for a preset time, detecting the turbidity of the circulating water of the propylene condenser, and finishing cleaning when the turbidity of the circulating water of the propylene condenser reaches a set value.
2. The method for cleaning the propylene condenser as claimed in claim 1, wherein the cleaning agent is prepared by sodium hypochlorite and a slime remover, and the amounts of the sodium hypochlorite and the slime remover are calculated according to the circulating water amount of the propylene condenser.
3. The method of claim 2, wherein the amounts of sodium hypochlorite and said slime remover are calculated to provide 0.05 kg of said sodium hypochlorite and 0.1 kg of said slime remover per ton of circulating water.
4. The method for cleaning a propylene condenser as claimed in claim 2, wherein the sodium hypochlorite is added first when the cleaning agent is added to the propylene condenser cleaning apparatus and the propylene condenser cleaning apparatus is operated, and the slime remover is added after the propylene condenser cleaning apparatus is operated for a predetermined time.
5. The cleaning method of the propylene condenser as claimed in claim 4, wherein when the sodium hypochlorite is added to the propylene condenser cleaning device, the sodium hypochlorite is added to a chemical adding tank (10) of the propylene condenser cleaning device, diluted to 20% concentration by adding water, left standing for a predetermined time, an air source valve and an inlet/outlet valve of a pneumatic pump (20) of the propylene condenser cleaning device are opened, the pneumatic pump (20) is started, and the diluted sodium hypochlorite is discharged to the propylene condenser.
6. The method for cleaning a propylene condenser according to claim 5, wherein after discharging the diluted sodium hypochlorite to the propylene condenser, an air supply valve and an outlet valve of the pneumatic pump (20) are closed, the slime remover is added to the chemical feeding tank (10) of the propylene condenser cleaning apparatus, diluted to 20% concentration by adding water, left for a predetermined time, the air supply valve and the outlet valve of the pneumatic pump (20) are opened, the pneumatic pump (20) is started and the diluted slime remover is discharged to the propylene condenser.
7. The method for cleaning a propylene condenser as claimed in claim 6, wherein after discharging the diluted slime remover into the propylene condenser, the sodium hypochlorite is newly added and the propylene condenser cleaning apparatus is operated.
8. The method for cleaning a propylene condenser as claimed in any one of claims 1 to 7, wherein, when the turbidity of the circulating water of the propylene condenser is detected, if the turbidity of the circulating water of the propylene condenser does not reach a set value, the step S3 is executed again until the turbidity of the circulating water of the propylene condenser reaches the set value.
9. The method according to any one of claims 1 to 7, wherein the propylene condenser cleaning device is communicated with a circulating water supply line of the propylene condenser when the propylene condenser cleaning device is communicated with the propylene condenser.
10. A cleaning apparatus for a propylene condenser, characterized by performing the cleaning method for a propylene condenser according to any one of claims 1 to 9, the cleaning apparatus for a propylene condenser comprising:
a dosing tank (10);
the pneumatic pump (20), the dosing groove (10) is communicated with the pneumatic pump (20);
the medicine feeding device comprises a medicine feeding pipeline (30), one end of the medicine feeding pipeline (30) is far away from one end of the medicine feeding groove (10) through the pneumatic pump (20) and is connected with a propylene condenser, and the other end of the medicine feeding pipeline (30) is connected with the propylene condenser.
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