CN112797839A - Cleaning-free system of sulfuric acid purification plate type heat exchanger and use method - Google Patents
Cleaning-free system of sulfuric acid purification plate type heat exchanger and use method Download PDFInfo
- Publication number
- CN112797839A CN112797839A CN202011610096.5A CN202011610096A CN112797839A CN 112797839 A CN112797839 A CN 112797839A CN 202011610096 A CN202011610096 A CN 202011610096A CN 112797839 A CN112797839 A CN 112797839A
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- Prior art keywords
- sulfuric acid
- valve
- cooling tower
- dilute sulfuric
- heat exchanger
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims abstract description 263
- 238000000746 purification Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 158
- 238000001816 cooling Methods 0.000 claims abstract description 93
- 238000002347 injection Methods 0.000 claims abstract description 82
- 239000007924 injection Substances 0.000 claims abstract description 82
- 238000004519 manufacturing process Methods 0.000 claims abstract description 64
- 238000007599 discharging Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 13
- 235000011149 sulphuric acid Nutrition 0.000 claims 1
- 239000001117 sulphuric acid Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 239000002253 acid Substances 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000012459 cleaning agent Substances 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 8
- 229910000019 calcium carbonate Inorganic materials 0.000 description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a cleaning-free system of a sulfuric acid purification plate type heat exchanger and a using method thereof, belonging to the technical field of heat exchangers. The cleaning-free system of the sulfuric acid purification plate type heat exchanger comprises a first production system and a second production system, wherein the first production system comprises a first dilute sulfuric acid injection pipe and a first cooling tower circulating water injection pipe, the tail end of the first dilute sulfuric acid injection pipe is fixedly connected with the plate type heat exchanger, the first dilute sulfuric acid injection pipe is fixedly connected with a first valve, the plate type heat exchanger is fixedly connected with a first dilute sulfuric acid discharge pipe, and the first dilute sulfuric acid discharge pipe is fixedly connected with a third valve; the invention can exchange the water side and the acid side of the plate heat exchanger through the valve switch, and the heat exchange effect is normal within 15 minutes of exchange, thereby saving the maintenance time, saving cleaning agent and manpower and increasing the economic benefit.
Description
Technical Field
The invention relates to the technical field of heat exchangers, in particular to a cleaning-free system of a sulfuric acid purification plate type heat exchanger and a using method thereof.
Background
In the production of sulfuric acid, the furnace gas is cleaned by acid pickling and dedusting, and the temperature of the furnace gas is reduced by adiabatic evaporation, so that a large amount of water vapor is generated. This water vapor is mixed in the furnace gas and is removed in a subsequent packed column. In the packed tower, the furnace gas and the circulating dilute sulfuric acid are directly contacted in a countercurrent manner for heat exchange, water vapor is condensed into water, and the water vapor and impurities are removed from the furnace gas and are left in the circulating acid. The cyclic dilute sulfuric acid absorbs the latent heat of vaporization of water vapor in the process, and a plate heat exchanger is needed for cooling. The circulating dilute sulfuric acid in the plate heat exchanger indirectly exchanges heat with circulating water of a water cooling tower to cool the circulating dilute sulfuric acid. In the existing situation, after the plate heat exchanger operates for a period of time, the heat exchange effect is deteriorated, the temperature of circulating dilute sulfuric acid is increased, and the temperature of furnace gas at the outlet of a packed tower is increased, so that abnormal production is caused. The reason for this is fouling of the water side of the plate heat exchanger, which requires cleaning. The existing cleaning method mainly comprises the steps of medicament cleaning and manual disassembly cleaning.
The problems and disadvantages of the prior art are: the agent cleaning needs the system to stop for one day, the effect is not ideal, and if the cleaning time is too short, the cleaning effect cannot be ensured; the manual cleaning is disassembled to ensure the cleaning effect, but the manual cleaning also needs to be stopped for one day, and meanwhile, the manual cleaning needs 10-20 workers to work for one day, which is troublesome and laborious; in order to solve the problems, a cleaning-free system of a sulfuric acid purification plate type heat exchanger and a using method are provided.
Disclosure of Invention
The invention aims to solve the problems of long time and poor effect of a plate heat exchanger in scale cleaning, and provides a cleaning-free system of a sulfuric acid purification plate heat exchanger and a use method thereof, which can achieve the purpose of exchanging the water side and the acid side of the plate heat exchanger through a valve switch in the production process, and the heat exchange effect is normal within 15 minutes of exchanging, thereby saving the maintenance time, saving cleaning agents and manpower and increasing the economic benefit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the cleaning-free system of the sulfuric acid purification plate type heat exchanger comprises a first production system and a second production system, wherein the first production system comprises a first dilute sulfuric acid injection pipe and a first cooling tower circulating water injection pipe, the tail end of the first dilute sulfuric acid injection pipe is fixedly connected with the plate type heat exchanger, a first valve is fixedly connected onto the first dilute sulfuric acid injection pipe, a first dilute sulfuric acid discharge pipe is fixedly connected onto the plate type heat exchanger, and a third valve is fixedly connected onto the first dilute sulfuric acid discharge pipe; the tail end of the first cooling tower circulating water injection pipe is communicated with the plate heat exchanger, a fifth valve is fixedly connected to the first cooling tower circulating water injection pipe, a first cooling tower circulating water discharge pipe is also fixedly connected to the plate heat exchanger, and a seventh valve is fixedly connected to the first cooling tower circulating water discharge pipe.
Preferably, the second production system comprises a second dilute sulfuric acid injection pipe, the second dilute sulfuric acid injection pipe is fixedly connected to the front end of the first valve on the first dilute sulfuric acid injection pipe, the tail end of the second dilute sulfuric acid injection pipe is fixedly connected to the front end of the seventh valve on the first water cooling tower circulating water discharge pipe, the second dilute sulfuric acid injection pipe is fixedly connected with the second valve, the front end of the fifth valve on the first water cooling tower circulating water injection pipe is fixedly connected with the second dilute sulfuric acid discharge pipe, and the second dilute sulfuric acid discharge pipe is fixedly connected with the fourth valve.
Preferably, the second production system further comprises a second cooling tower circulating water injection pipe, the second cooling tower circulating water injection pipe is fixedly connected to the rear end of a fifth valve on the first cooling tower circulating water injection pipe, the tail end of the second cooling tower circulating water injection pipe is fixedly connected to the plate heat exchanger, a sixth valve is fixedly connected to the second cooling tower circulating water injection pipe, a second cooling tower circulating water discharge pipe is fixedly connected to the rear end of the first valve on the first dilute sulfuric acid injection pipe, the tail end of the second cooling tower circulating water discharge pipe is fixedly connected to the rear end of a seventh valve on the first cooling tower circulating water discharge pipe, and an eighth valve is fixedly connected to the second cooling tower circulating water discharge pipe.
Preferably, when the first production system works, the second valve, the fourth valve, the sixth valve and the eighth valve are all in a closed state; when the second production system works, the first valve, the third valve, the fifth valve and the seventh valve are all in a closed state.
A use method of a cleaning-free system of a sulfuric acid purification plate type heat exchanger provided by the cleaning-free system of the sulfuric acid purification plate type heat exchanger comprises the following steps:
s1, when the first production system works, closing the second valve, the fourth valve, the sixth valve and the eighth valve, and injecting dilute sulfuric acid into the plate heat exchanger from the first dilute sulfuric acid injection pipe through the first valve;
s2, discharging the dilute sulfuric acid from the plate heat exchanger, and returning the dilute sulfuric acid to the production system from the first dilute sulfuric acid discharge pipe through a third valve;
s3, simultaneously, injecting the circulating water of the water cooling tower into the plate heat exchanger from the first circulating water injection pipe of the water cooling tower through a fifth valve;
s4, discharging circulating water of the water cooling tower from the plate heat exchanger, and discharging the circulating water of the first water cooling tower from a circulating water discharge pipe of the first water cooling tower through a seventh valve;
s5, after the first production system is used for a period of time, closing the first valve, the third valve, the fifth valve and the seventh valve, starting the second production system, and injecting dilute sulfuric acid into the plate heat exchanger from the first cooling tower circulating water discharge pipe through the first dilute sulfuric acid injection pipe, the second dilute sulfuric acid injection pipe and the second valve;
s6, discharging dilute sulfuric acid from the plate heat exchanger, and returning the dilute sulfuric acid to the production system from the first dilute sulfuric acid discharge pipe through the first cooling tower circulating water injection pipe, the second dilute sulfuric acid discharge pipe and the fourth valve;
s7, simultaneously, injecting the circulating water of the water cooling tower into the plate heat exchanger from the first dilute sulfuric acid discharge pipe through the first circulating water injection pipe of the water cooling tower, the second circulating water injection pipe of the water cooling tower and the sixth valve;
and S8, discharging the circulating water of the water cooling tower from the plate heat exchanger, and discharging the circulating water of the first water cooling tower from the circulating water discharge pipe of the first water cooling tower through the first dilute sulfuric acid injection pipe, the second circulating water discharge pipe of the water cooling tower and the eighth valve.
Preferably, the first production system and the second production system can be switched circularly according to actual production conditions in the production process.
Compared with the prior art, the invention provides a cleaning-free system of a sulfuric acid purification plate type heat exchanger and a use method thereof, and the cleaning-free system has the following beneficial effects:
the invention provides a cleaning-free system of a sulfuric acid purification plate type heat exchanger, and also provides a matched use method of the cleaning-free system of the sulfuric acid purification plate type heat exchanger, wherein the cleaning-free system of the sulfuric acid purification plate type heat exchanger comprises a first production system and a second production system, when scaling is formed on the water side in the plate type heat exchanger and the heat exchange effect is reduced in the use process, the switching between the first production system and the second production system is controlled through a valve switch, the water side and the acid side of the plate type heat exchanger are exchanged, one side of the original dilute sulfuric acid is cooled and circulated, one side of the original dilute water tower circulated water is cooled and circulated, the dilute sulfuric acid is fed on one side of the original cooling water tower circulated water, as the main component of scale is calcium carbonate which is insoluble in water, the calcium carbonate and the dilute sulfuric acid react to generate calcium sulfate which is slightly soluble in water, and the dilute sulfuric acid at the sulfuric, form the turbulent flow, the ore dust particle has the effect of continuously scouring away the incrustation scale, reaches the scale removal effect, utilizes dilute sulfuric acid to clear away the incrustation scale, reaches fine heat transfer effect, and the heat transfer effect can reach normally in exchanging 15 minutes moreover, has saved maintenance time, saves cleaner and manual work, has increased economic benefits.
Drawings
FIG. 1 is a schematic system structure diagram of a cleaning-free system of a sulfuric acid purification plate heat exchanger provided by the invention;
FIG. 2 is a schematic diagram of a first production system in a working state according to a cleaning-free system machine using method for a sulfuric acid purification plate heat exchanger provided by the invention;
FIG. 3 is a schematic diagram of the second production system in operation according to the use method of the cleaning-free system machine for the sulfuric acid purification plate heat exchanger provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1:
referring to fig. 1-3, a cleaning-free system of a sulfuric acid purification plate heat exchanger comprises a first production system and a second production system, wherein the first production system comprises a first dilute sulfuric acid injection pipe and a first cooling tower circulating water injection pipe, the tail end of the first dilute sulfuric acid injection pipe is fixedly connected to the plate heat exchanger, the first dilute sulfuric acid injection pipe is fixedly connected with a first valve, the plate heat exchanger is fixedly connected with a first dilute sulfuric acid discharge pipe, and the first dilute sulfuric acid discharge pipe is fixedly connected with a third valve; the tail end of the first cooling tower circulating water injection pipe is communicated with the plate heat exchanger, the fifth valve is fixedly connected to the first cooling tower circulating water injection pipe, the first cooling tower circulating water discharge pipe is also fixedly connected to the plate heat exchanger, and the seventh valve is fixedly connected to the first cooling tower circulating water discharge pipe.
The second production system comprises a second dilute sulfuric acid injection pipe, the second dilute sulfuric acid injection pipe is fixedly connected to the front end of the first valve on the first dilute sulfuric acid injection pipe, the tail end of the second dilute sulfuric acid injection pipe is fixedly connected to the front end of the seventh valve on the first water cooling tower circulating water discharge pipe, the second dilute sulfuric acid injection pipe is fixedly connected with the second valve, the front end of the fifth valve on the first water cooling tower circulating water injection pipe is fixedly connected with the second dilute sulfuric acid discharge pipe, and the second dilute sulfuric acid discharge pipe is fixedly connected with the fourth valve.
The second production system also comprises a second cooling tower circulating water injection pipe, the second cooling tower circulating water injection pipe is fixedly connected to the rear end of a fifth valve on the first cooling tower circulating water injection pipe, the tail end of the second cooling tower circulating water injection pipe is fixedly connected to the plate heat exchanger, a sixth valve is fixedly connected to the second cooling tower circulating water injection pipe, a second cooling tower circulating water discharge pipe is fixedly connected to the rear end of a first valve on the first dilute sulfuric acid injection pipe, the tail end of the second cooling tower circulating water discharge pipe is fixedly connected to the rear end of a seventh valve on the first cooling tower circulating water discharge pipe, and an eighth valve is fixedly connected to the second cooling tower circulating water discharge pipe.
When the first production system works, the second valve, the fourth valve, the sixth valve and the eighth valve are all in a closed state; when the second production system works, the first valve, the third valve, the fifth valve and the seventh valve are all in a closed state.
A use method of a cleaning-free system of a sulfuric acid purification plate type heat exchanger provided by the cleaning-free system of the sulfuric acid purification plate type heat exchanger comprises the following steps:
s1, when the first production system works, closing the second valve, the fourth valve, the sixth valve and the eighth valve, and injecting dilute sulfuric acid into the plate heat exchanger from the first dilute sulfuric acid injection pipe through the first valve;
s2, discharging the dilute sulfuric acid from the plate heat exchanger, and returning the dilute sulfuric acid to the production system from the first dilute sulfuric acid discharge pipe through a third valve;
s3, simultaneously, injecting the circulating water of the water cooling tower into the plate heat exchanger from the first circulating water injection pipe of the water cooling tower through a fifth valve;
s4, discharging circulating water of the water cooling tower from the plate heat exchanger, and discharging the circulating water of the first water cooling tower from a circulating water discharge pipe of the first water cooling tower through a seventh valve;
s5, after the first production system is used for a period of time, closing the first valve, the third valve, the fifth valve and the seventh valve, starting the second production system, and injecting dilute sulfuric acid into the plate heat exchanger from the first cooling tower circulating water discharge pipe through the first dilute sulfuric acid injection pipe, the second dilute sulfuric acid injection pipe and the second valve;
s6, discharging dilute sulfuric acid from the plate heat exchanger, and returning the dilute sulfuric acid to the production system from the first dilute sulfuric acid discharge pipe through the first cooling tower circulating water injection pipe, the second dilute sulfuric acid discharge pipe and the fourth valve;
s7, simultaneously, injecting the circulating water of the water cooling tower into the plate heat exchanger from the first dilute sulfuric acid discharge pipe through the first circulating water injection pipe of the water cooling tower, the second circulating water injection pipe of the water cooling tower and the sixth valve;
and S8, discharging the circulating water of the water cooling tower from the plate heat exchanger, and discharging the circulating water of the first water cooling tower from the circulating water discharge pipe of the first water cooling tower through the first dilute sulfuric acid injection pipe, the second circulating water discharge pipe of the water cooling tower and the eighth valve.
The first production system and the second production system can be switched circularly according to the actual production condition in the production process.
The invention provides a cleaning-free system of a sulfuric acid purification plate type heat exchanger, and also provides a matched use method of the cleaning-free system of the sulfuric acid purification plate type heat exchanger, wherein the cleaning-free system of the sulfuric acid purification plate type heat exchanger comprises a first production system and a second production system, when scaling is formed on the water side in the plate type heat exchanger and the heat exchange effect is reduced in the use process, the switching between the first production system and the second production system is controlled through a valve switch, the water side and the acid side of the plate type heat exchanger are exchanged, one side of the original dilute sulfuric acid is cooled and circulated, one side of the original dilute water tower circulated water is cooled and circulated, the dilute sulfuric acid is fed on one side of the original cooling water tower circulated water, as the main component of scale is calcium carbonate which is insoluble in water, the calcium carbonate and the dilute sulfuric acid react to generate calcium sulfate which is slightly soluble in water, and the dilute sulfuric acid at the sulfuric, form the turbulent flow, the ore dust particle has the effect of continuously scouring away the incrustation scale, reaches the scale removal effect, utilizes dilute sulfuric acid to clear away the incrustation scale, reaches fine heat transfer effect, and the heat transfer effect can reach normally in exchanging 15 minutes moreover, has saved maintenance time, saves cleaner and manual work, has increased economic benefits.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (6)
1. Sulphuric acid purifies plate heat exchanger and exempts from cleaning system, its characterized in that: the device comprises a first production system and a second production system, wherein the first production system comprises a first dilute sulfuric acid injection pipe and a first cooling tower circulating water injection pipe, the tail end of the first dilute sulfuric acid injection pipe is fixedly connected with a plate heat exchanger, a first valve is fixedly connected to the first dilute sulfuric acid injection pipe, a first dilute sulfuric acid discharge pipe is fixedly connected to the plate heat exchanger, and a third valve is fixedly connected to the first dilute sulfuric acid discharge pipe; the tail end of the first cooling tower circulating water injection pipe is communicated with the plate heat exchanger, a fifth valve is fixedly connected to the first cooling tower circulating water injection pipe, a first cooling tower circulating water discharge pipe is also fixedly connected to the plate heat exchanger, and a seventh valve is fixedly connected to the first cooling tower circulating water discharge pipe.
2. The cleaning-free system of a sulfuric acid purification plate heat exchanger according to claim 1, characterized in that: the second production system comprises a second dilute sulfuric acid injection pipe, the second dilute sulfuric acid injection pipe is fixedly connected to the front end of a first valve on the first dilute sulfuric acid injection pipe, the tail end of the second dilute sulfuric acid injection pipe is fixedly connected to the front end of a seventh valve on a first water cooling tower circulating water discharge pipe, a second valve is fixedly connected to the second dilute sulfuric acid injection pipe, a second dilute sulfuric acid discharge pipe is fixedly connected to the front end of a fifth valve on the first water cooling tower circulating water injection pipe, and a fourth valve is fixedly connected to the second dilute sulfuric acid discharge pipe.
3. The cleaning-free system of a sulfuric acid purification plate heat exchanger as claimed in claim 2, wherein: the second production system further comprises a second cooling tower circulating water injection pipe, the second cooling tower circulating water injection pipe is fixedly connected to the rear end of a fifth valve on the first cooling tower circulating water injection pipe, the tail end of the second cooling tower circulating water injection pipe is fixedly connected to the plate heat exchanger, a sixth valve is fixedly connected to the second cooling tower circulating water injection pipe, a second cooling tower circulating water discharge pipe is fixedly connected to the rear end of a first valve on the first dilute sulfuric acid injection pipe, the tail end of the second cooling tower circulating water discharge pipe is fixedly connected to the rear end of a seventh valve on the first cooling tower circulating water discharge pipe, and an eighth valve is fixedly connected to the second cooling tower circulating water discharge pipe.
4. The cleaning-free system of a sulfuric acid purification plate heat exchanger as claimed in claim 3, wherein: when the first production system works, the second valve, the fourth valve, the sixth valve and the eighth valve are all in a closed state; when the second production system works, the first valve, the third valve, the fifth valve and the seventh valve are all in a closed state.
5. A use method of the cleaning-free system of the sulfuric acid purification plate type heat exchanger provided by the cleaning-free system of the sulfuric acid purification plate type heat exchanger according to claim 4 is characterized by comprising the following steps:
s1, when the first production system works, closing the second valve, the fourth valve, the sixth valve and the eighth valve, and injecting dilute sulfuric acid into the plate heat exchanger from the first dilute sulfuric acid injection pipe through the first valve;
s2, discharging the dilute sulfuric acid from the plate heat exchanger, and returning the dilute sulfuric acid to the production system from the first dilute sulfuric acid discharge pipe through a third valve;
s3, simultaneously, injecting the circulating water of the water cooling tower into the plate heat exchanger from the first circulating water injection pipe of the water cooling tower through a fifth valve;
s4, discharging circulating water of the water cooling tower from the plate heat exchanger, and discharging the circulating water of the first water cooling tower from a circulating water discharge pipe of the first water cooling tower through a seventh valve;
s5, after the first production system is used for a period of time, closing the first valve, the third valve, the fifth valve and the seventh valve, starting the second production system, and injecting dilute sulfuric acid into the plate heat exchanger from the first cooling tower circulating water discharge pipe through the first dilute sulfuric acid injection pipe, the second dilute sulfuric acid injection pipe and the second valve;
s6, discharging dilute sulfuric acid from the plate heat exchanger, and returning the dilute sulfuric acid to the production system from the first dilute sulfuric acid discharge pipe through the first cooling tower circulating water injection pipe, the second dilute sulfuric acid discharge pipe and the fourth valve;
s7, simultaneously, injecting the circulating water of the water cooling tower into the plate heat exchanger from the first dilute sulfuric acid discharge pipe through the first circulating water injection pipe of the water cooling tower, the second circulating water injection pipe of the water cooling tower and the sixth valve;
and S8, discharging the circulating water of the water cooling tower from the plate heat exchanger, and discharging the circulating water of the first water cooling tower from the circulating water discharge pipe of the first water cooling tower through the first dilute sulfuric acid injection pipe, the second circulating water discharge pipe of the water cooling tower and the eighth valve.
6. The use method of the cleaning-free system of the sulfuric acid purification plate heat exchanger as claimed in claim 5, wherein the cleaning-free system comprises the following steps: the first production system and the second production system can be switched circularly according to actual production conditions in the production process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011610096.5A CN112797839A (en) | 2020-12-30 | 2020-12-30 | Cleaning-free system of sulfuric acid purification plate type heat exchanger and use method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011610096.5A CN112797839A (en) | 2020-12-30 | 2020-12-30 | Cleaning-free system of sulfuric acid purification plate type heat exchanger and use method |
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| CN112797839A true CN112797839A (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011610096.5A Pending CN112797839A (en) | 2020-12-30 | 2020-12-30 | Cleaning-free system of sulfuric acid purification plate type heat exchanger and use method |
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| CN (1) | CN112797839A (en) |
Citations (6)
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|---|---|---|---|---|
| US4131155A (en) * | 1975-01-28 | 1978-12-26 | Air Products And Chemicals, Inc. | Reversible heat exchanger or regenerator systems |
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| CN202329402U (en) * | 2011-11-21 | 2012-07-11 | 友谊九鼎酵母有限公司 | Self-cleaning device for plate-type heat exchanger in yeast fermentation production |
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-
2020
- 2020-12-30 CN CN202011610096.5A patent/CN112797839A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131155A (en) * | 1975-01-28 | 1978-12-26 | Air Products And Chemicals, Inc. | Reversible heat exchanger or regenerator systems |
| JP2010038438A (en) * | 2008-08-05 | 2010-02-18 | Fuji Electric Systems Co Ltd | Descaling method and device for heat exchanger |
| CN202329402U (en) * | 2011-11-21 | 2012-07-11 | 友谊九鼎酵母有限公司 | Self-cleaning device for plate-type heat exchanger in yeast fermentation production |
| CN204730736U (en) * | 2015-06-05 | 2015-10-28 | 德州实华化工有限公司 | A kind of flushing plate type heat exchanger |
| CN207019539U (en) * | 2017-07-31 | 2018-02-16 | 湖南军信环保股份有限公司 | The full-automatic online backflushing cleaning device of MBR plate type heat exchangers |
| CN207197349U (en) * | 2017-08-25 | 2018-04-06 | 金川集团股份有限公司 | A kind of plate type heat exchanger with on-line cleaning mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 蔺文: "《家庭消费小窍门》", 31 October 1991, 河北人民出版社 * |
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Application publication date: 20210514 |