CN114199074A - Heat exchanger rust removal system and rust removal process - Google Patents
Heat exchanger rust removal system and rust removal process Download PDFInfo
- Publication number
- CN114199074A CN114199074A CN202111337863.4A CN202111337863A CN114199074A CN 114199074 A CN114199074 A CN 114199074A CN 202111337863 A CN202111337863 A CN 202111337863A CN 114199074 A CN114199074 A CN 114199074A
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- Prior art keywords
- storage tank
- heat exchanger
- assembly
- outlet
- rust
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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
- F28G13/00—Appliances or processes not covered by groups F28G1/00 - F28G11/00; Combinations of appliances or processes covered by groups F28G1/00 - F28G11/00
-
- 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
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/12—Fluid-propelled scrapers, bullets, or like solid bodies
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a heat exchanger rust removal system and a rust removal process thereof, which comprise the following steps: the bracket is used for mounting the heat exchanger on the bracket; a storage tank which contains a rust remover or clean water; the outlet assembly and the inlet assembly are respectively connected to an inlet and an outlet of the heat exchanger through flanges; a liquid outlet of the storage tank is communicated to the inlet assembly through the ball valve, the water pump inlet assembly, the water pump and the adjusting assembly, and the outlet assembly is communicated to the storage tank through the adjusting valve. The heat exchanger rust removal system and the rust removal process thereof have good rust removal effect and can remove rust on both the shell pass and the tube pass.
Description
Technical Field
The invention relates to a system and a process for removing rust on a wound tube type heat exchanger, and belongs to the technical field of heat exchangers.
Background
The heat exchanger is a heat exchange device with compact structure and high efficiency, is widely applied to industries such as metallurgy, petroleum, pharmacy, ships, textile chemical industry, medicines, food and the like, and is excellent equipment for realizing the purposes of heating, cooling, heat recovery, quick sterilization and the like.
Meanwhile, in order to prevent rusting, an extremely thin, firm, fine and stable chromium-rich oxide film (protective film) is generally generated on the surface of the stainless steel heat exchanger to prevent oxygen atoms from continuously permeating and oxidizing, so that the rust resistance is obtained. However, when the heat exchanger is used in cooling exchange occasions for a long time, the surface protective film and the stainless steel heat exchanger shell or tube body are different in thermal expansion coefficient, so that the protective film is inevitably cracked, and in addition, the heat conducting medium is continuously eroded, the protective film is continuously damaged, so that oxygen atoms in liquid are continuously infiltrated or iron atoms in metal are continuously separated out to form loose iron oxide, and the metal surface in the heat exchanger shell or tube body is continuously rusted. Therefore, manual brushing and rust removal are required to be performed regularly, but the manual rust removal efficiency is low, and rust removal operation cannot be performed on corner positions, so that the effect is not satisfactory.
Nowadays, people start to commonly adopt a rust removal system to replace a conventional manual mode, but the conventional rust removal system has a single operation mode and can only remove rust on a shell pass, for example, a shell-and-tube heat exchanger convenient for shell rust removal disclosed in Chinese patent CN201821429018.3 is additionally provided with a rust removal pipeline to realize passive rust removal, and the rust removal effect is common; for this reason, some enterprises have developed a shell-and-tube heat exchanger convenient for shell rust removal, as disclosed in chinese patent CN202022556723.3, which achieves active rust removal by means of steam scouring, but has high energy consumption and low rust removal efficiency. In view of the foregoing, a need exists for a system and process that can perform rust removal operations on both the shell side and the tube side of a heat exchanger.
Disclosure of Invention
The invention aims to overcome the defects and provide the heat exchanger rust removal system and the rust removal process which have good rust removal effect and can remove rust on both the shell pass and the tube pass.
The purpose of the invention is realized as follows:
a heat exchanger rust cleaning system, comprising:
the bracket is used for mounting the heat exchanger on the bracket;
a storage tank which contains a rust remover or clean water;
the outlet assembly and the inlet assembly are respectively connected to an inlet and an outlet of the heat exchanger through flanges;
a liquid outlet of the storage tank is communicated to the inlet assembly through the ball valve, the water pump inlet assembly, the water pump and the adjusting assembly, and the outlet assembly is communicated to the storage tank through the adjusting valve.
The invention relates to a rust removal process for a heat exchanger, which comprises the following process steps of:
step 1, filling a rust remover: a liquid outlet of the storage tank filled with the rust remover is communicated with a tube pass inlet of the heat exchanger through the inlet assembly after passing through the ball valve, the water pump inlet assembly, the water pump and the adjusting assembly, and meanwhile, a tube pass outlet of the heat exchanger is connected to the storage tank through the outlet assembly; after the assembly is finished and the rust remover is checked to be correct, opening the ball valve, and starting the water pump to fill the rust remover in the storage tank into a heat exchange pipe of the heat exchanger through the inlet assembly;
step 2, recycling the rust remover: opening a regulating valve on a pipeline connecting the outlet assembly and the storage tank to enable the rust remover to flow back into the storage tank from a tube side outlet of the heat exchanger, and closing the regulating valve after the liquid level in the storage tank stops rising;
step 3, cleaning: removing the outlet assembly and the inlet assembly from the connection with the tube pass inlet and outlet of the heat exchanger, cleaning each heat exchange tube by using a sponge ball or a sponge column, connecting the outlet assembly and the inlet assembly with the tube pass inlet and outlet of the heat exchanger, replacing the storage tank containing the rust remover in the step 1 and the step 2 by using the storage tank containing clear water, and repeating the step 1 and the step 2 after the water pump is connected with the storage tank containing clear water; and wiping each heat exchange tube once by using a sponge ball or a sponge column.
Preferably, in step 2, the residual rust remover in the water pump and the pipeline is discharged through the water pump inlet assembly.
Preferably, in step 3, the water returned from the storage tank containing clear water is treated by a reverse osmosis method and then discharged.
Preferably, in step 3, the method for cleaning or wiping the sponge ball or the sponge column comprises the following steps: the outer diameter of the sponge ball or the sponge column is equal to the inner diameter of the heat exchange tube, after the sponge ball or the sponge column is plugged into the heat exchange tube, the inflating joint connected with a compressed air source is inserted into the heat exchange tube, the inflating joint is a rubber tube, the outer diameter of the rubber tube is slightly larger than the inner diameter of the heat exchange tube, the rubber tube is inserted into the heat exchange tube, and then compressed air is introduced to enable the sponge ball to rush out of the heat exchange tube under the pressure action of the air, so that the cleaning or wiping operation of the heat exchange tube is realized.
The invention relates to a rust removal process for a heat exchanger, which comprises the following process steps of:
step 1, filling a rust remover: a liquid outlet of the storage tank filled with the rust remover is communicated with a shell pass inlet of the heat exchanger through an inlet assembly after passing through a ball valve, a water pump inlet assembly, a water pump and an adjusting assembly, and a shell pass outlet of the heat exchanger is connected to the storage tank through an outlet assembly; after the assembly is finished and the assembly is checked to be correct, opening the ball valve, and starting the water pump to fill the rust remover in the storage tank into the shell pass channel of the heat exchanger through the inlet assembly;
step 2, recycling the rust remover: opening a regulating valve on a pipeline connecting the outlet assembly and the storage tank to enable the rust remover to flow back into the storage tank from the shell side outlet of the heat exchanger, and closing the regulating valve after the liquid level in the storage tank stops rising;
step 3, cleaning: and (3) replacing the storage tank containing the rust remover in the step (1) and the step (2) with the storage tank containing the clear water, and repeating the step (1) and the step (2) after the water pump is connected with the storage tank containing the clear water.
Compared with the prior art, the invention has the beneficial effects that:
the invention has good rust removal effect, can remove rust on both the shell pass and the tube pass, particularly under the conditions of serious scaling and complex components, is difficult to clean by a common physical method, and wastes time and labor in the disassembly and cleaning process.
Drawings
FIG. 1 is a schematic structural diagram of a rust removal system of a heat exchanger.
Wherein:
the device comprises an outlet assembly 1, a bolt 2, a nut 3, a gasket 4, a support 5, an inlet assembly 6, an adjusting assembly 7, a water pump 8, a water pump inlet assembly 9, a ball valve 10 and a storage tank 11;
and a drain valve 7.1.
Detailed Description
Referring to fig. 1, the invention relates to a rust removing process for a heat exchanger, which comprises the following steps:
step 1, filling a rust remover: the method comprises the steps that firstly, a tubular heat exchanger to be derusted is installed on a support 5 through bolts 2, nuts 3 and gaskets 4, after a derusting system (the derusting system consists of an outlet assembly 1, an inlet assembly 6, an adjusting assembly 7, a water pump 8, a water pump inlet assembly 9 and a ball valve 10) is assembled and checked to be correct, the ball valve is opened, the water pump is started to fill a derusting agent in a derusting agent medicine box (the derusting agent medicine box is formed by filling derusting liquid in a storage tank 11) into a heat exchange tube of the heat exchanger (or a shell pass channel of the heat exchanger) through a tube pass inlet of the heat exchanger (or a shell pass inlet of the heat exchanger), so that the derusting agent continuously flows into the tube pass of the heat exchanger (or the shell pass of the heat exchanger), and the liquid flow is controlled to be about 80m thick bamboo/h through the adjusting assembly;
step 2, recycling the rust remover: opening a ball valve and an adjusting valve of a rust remover medicine box to enable the rust remover to flow back into the rust remover medicine box from a heat exchanger tube pass outlet (or a heat exchanger shell pass outlet), and closing the ball valve and the adjusting valve of the rust remover medicine box after the liquid level in the rust remover medicine box stops rising; then, residual rust remover in the water pump and the pipeline is discharged through a water pump suction inlet and a liquid discharge valve 7.1 on the pipeline of the adjusting assembly 7, and the rust remover is recovered by a clean barrel;
step 3, cleaning: removing a connecting flange between the rust removal system and a heat exchanger tube pass inlet and outlet (or a heat exchanger shell pass inlet and outlet), cleaning each heat exchange tube once by using a sponge ball, recovering the connection between the rust removal system and the heat exchanger tube pass inlet and outlet (or the heat exchanger shell pass inlet and outlet), connecting a water pump with a cleaning water tank (the cleaning water tank is formed by filling clear water in a storage tank 11), and cleaning the heat exchanger tube pass (or the heat exchanger shell pass) according to the step 1;
note: cleaning water is clean and the content of chloride ions is not more than 25mg/L, draining the water after cleaning, and drying by using a hot air blower;
and 4, treating the water returned by the cleaning water tank by a reverse osmosis method, and discharging the water after the water reaches the environmental protection standard.
Step 5, wiping the heat exchange tube by using the sponge balls again after cleaning; wherein, the wiping process of the sponge ball is as follows: the outer diameter of the sponge ball is equal to the inner diameter of the heat exchange tube, after the sponge ball is plugged into the heat exchange tube, the inflation joint connected with a compressed air source is inserted into the heat exchange tube, the inflation joint is a rubber tube, the outer diameter of the rubber tube is slightly larger than the inner diameter of the heat exchange tube, 1-2 notch grooves are formed in the head of the rubber tube along the axial direction of the rubber tube, the rubber tube is conveniently inserted into the heat exchange tube, then compressed air is introduced to enable the sponge ball to be pushed out of the heat exchange tube under the pressure action of the air, and therefore cleaning or wiping operation of the heat exchange tube is achieved;
in addition: it should be noted that the above-mentioned embodiment is only a preferred embodiment of the present patent, and any modification or improvement made by those skilled in the art based on the above-mentioned conception is within the protection scope of the present patent.
Claims (6)
1. A rust removal process for a heat exchanger is characterized by comprising the following steps: the process comprises the following steps:
step 1, filling a rust remover: a liquid outlet of a storage tank (11) filled with a rust remover is communicated with a heat exchanger tube pass inlet through an inlet assembly (6) after passing through a ball valve (10), a water pump inlet assembly (9), a water pump (8) and an adjusting assembly (7), and meanwhile, a heat exchanger tube pass outlet is connected to the storage tank (11) through an outlet assembly (1); after the assembly is finished and the assembly is checked to be correct, the ball valve (10) is opened, the water pump (8) is started to fill the rust remover in the storage tank (11) into a heat exchange pipe of the heat exchanger through the inlet assembly (6);
step 2, recycling the rust remover: opening a regulating valve on a pipeline connecting the outlet assembly (1) and the storage tank (11) to enable the rust remover to flow back into the storage tank (11) from a tube pass outlet of the heat exchanger, and closing the regulating valve after the liquid level in the storage tank (11) stops rising;
step 3, cleaning: removing the outlet assembly (1) and the inlet assembly (6) from the connection with the tube pass inlet and outlet of the heat exchanger, cleaning each heat exchange tube by using a sponge ball or a sponge column, connecting the outlet assembly (1) and the inlet assembly (6) with the tube pass inlet and outlet of the heat exchanger, replacing the storage tank (11) containing the rust remover in the step 1 and the step 2 by using the storage tank (11) containing clear water, and repeating the step 1 and the step 2 after the water pump (8) is connected with the storage tank (11) containing clear water; and wiping each heat exchange tube once by using a sponge ball or a sponge column.
2. The rust removal process for the heat exchanger as claimed in claim 1, wherein the rust removal process comprises the following steps: in step 2, the water pump (8) and the residual rust remover in the pipeline are discharged through the water pump inlet assembly (9).
3. The rust removal process for the heat exchanger as claimed in claim 1, wherein the rust removal process comprises the following steps: in the step 3, the water returned by the storage tank (11) filled with clear water is treated by a reverse osmosis method and then discharged.
4. The rust removal process for the heat exchanger as claimed in claim 1, wherein the rust removal process comprises the following steps: in the step 3, the method for cleaning or wiping the sponge ball or the sponge column comprises the following steps: the outer diameter of the sponge ball or the sponge column is equal to the inner diameter of the heat exchange tube, after the sponge ball or the sponge column is plugged into the heat exchange tube, the inflating joint connected with a compressed air source is inserted into the heat exchange tube, the inflating joint is a rubber tube, the outer diameter of the rubber tube is slightly larger than the inner diameter of the heat exchange tube, the rubber tube is inserted into the heat exchange tube, and then compressed air is introduced to enable the sponge ball to rush out of the heat exchange tube under the pressure action of the air, so that the cleaning or wiping operation of the heat exchange tube is realized.
5. A rust removal process for a heat exchanger is characterized by comprising the following steps: the process comprises the following steps:
step 1, filling a rust remover: a liquid outlet of a storage tank (11) filled with a rust remover is communicated with a shell pass inlet of the heat exchanger through an inlet assembly (6) after passing through a ball valve (10), a water pump inlet assembly (9), a water pump (8) and an adjusting assembly (7), and meanwhile, a shell pass outlet of the heat exchanger is connected to the storage tank (11) through an outlet assembly (1); after the assembly is finished and the assembly is checked to be correct, the ball valve (10) is opened, the water pump (8) is started to fill the rust remover in the storage tank (11) into a shell side channel of the heat exchanger through the inlet assembly (6);
step 2, recycling the rust remover: opening a regulating valve on a pipeline connecting the outlet component (1) and the storage tank (11) to enable the rust remover to flow back into the storage tank (11) from a shell side outlet of the heat exchanger, and closing the regulating valve after the liquid level in the storage tank (11) stops rising;
step 3, cleaning: and (3) replacing the storage tank (11) containing the rust remover in the step (1) and the step (2) with the storage tank (11) containing the clear water, and repeating the step (1) and the step (2) after the water pump (8) is connected with the storage tank (11) containing the clear water.
6. The utility model provides a heat exchanger rust cleaning system which characterized in that: comprises the following steps:
a bracket (5) for mounting the heat exchanger on the bracket (5);
a storage tank (11) which contains a rust remover or clean water;
the outlet assembly (1) and the inlet assembly (6) are respectively connected to an inlet and an outlet of the heat exchanger through flanges;
a liquid outlet of the storage tank (11) is communicated to the inlet assembly (6) through the ball valve (10), the water pump inlet assembly (9), the water pump (8) and the adjusting assembly (7), and the outlet assembly (1) is communicated to the storage tank (11) through the adjusting valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111337863.4A CN114199074A (en) | 2021-11-12 | 2021-11-12 | Heat exchanger rust removal system and rust removal process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111337863.4A CN114199074A (en) | 2021-11-12 | 2021-11-12 | Heat exchanger rust removal system and rust removal process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114199074A true CN114199074A (en) | 2022-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111337863.4A Pending CN114199074A (en) | 2021-11-12 | 2021-11-12 | Heat exchanger rust removal system and rust removal process |
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| CN (1) | CN114199074A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101221027A (en) * | 2008-01-23 | 2008-07-16 | 清华大学 | In-position cleaning method for town regenerated water plate type heat exchanger |
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| KR20180092646A (en) * | 2017-02-10 | 2018-08-20 | (주)제스엔지니어링 | A sponge ball filled with a hydrophilic gas and a filling method and an apparatus thereof. |
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| CN208920949U (en) * | 2018-07-30 | 2019-05-31 | 抚顺欣和石化设备制造有限公司 | Heat exchanger with automatic cleaning function assembles equipment |
| CN209857434U (en) * | 2019-01-08 | 2019-12-27 | 南京天源重工设备有限公司 | Refrigeration heat exchanger convenient to scale removal |
| CN211601715U (en) * | 2019-12-31 | 2020-09-29 | 山东九泽换热系统有限公司 | Online cleaning device for heat exchanger |
| CN212512684U (en) * | 2020-06-28 | 2021-02-09 | 华能山东发电有限公司烟台发电厂 | Full-automatic on-line cleaning device for plate heat exchanger for heat supply network system |
| CN214120924U (en) * | 2020-12-28 | 2021-09-03 | 阳新鹏富矿业有限公司 | Cleaning device for plate-fin heat exchanger |
| CN113446895A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Mixed washing of printed circuit board formula heat exchanger and maintenance device |
-
2021
- 2021-11-12 CN CN202111337863.4A patent/CN114199074A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4350202A (en) * | 1979-08-14 | 1982-09-21 | Kleiber & Schulz, Inc. | Extractor for recirculating cleaning bodies in a fluid-circulation system |
| DE3929782A1 (en) * | 1989-09-07 | 1990-03-29 | Siemens Ag | Cleaning of heat exchanger tubes - by driving cleaning balls through tubes by water pressure |
| CN101221027A (en) * | 2008-01-23 | 2008-07-16 | 清华大学 | In-position cleaning method for town regenerated water plate type heat exchanger |
| CN202304582U (en) * | 2011-10-12 | 2012-07-04 | 江苏河海新能源有限公司 | Cleaner for shell-and-tube heat exchanger |
| CN203100539U (en) * | 2012-12-13 | 2013-07-31 | 中国石油化工股份有限公司 | Movable type heat exchanger cleaning device |
| CN203190879U (en) * | 2013-04-25 | 2013-09-11 | 北京君盛能源科技有限公司 | Automatic shell-and-tube heat exchanger cleaning device with flowing rubber balls |
| CN105369262A (en) * | 2015-10-28 | 2016-03-02 | 天津亿利科能源科技发展股份有限公司 | Anti-scaling agent for natural gas heat exchanger and cleaning method |
| TWM521717U (en) * | 2015-12-22 | 2016-05-11 | Eming Med Biotech Co Ltd | Sponge ball in-line automatic cleaning system for shell and tube heat exchanger piping |
| CN205607239U (en) * | 2016-05-01 | 2016-09-28 | 何铁民 | Ground heating coil scale removal belt cleaning device |
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| CN208920949U (en) * | 2018-07-30 | 2019-05-31 | 抚顺欣和石化设备制造有限公司 | Heat exchanger with automatic cleaning function assembles equipment |
| CN209857434U (en) * | 2019-01-08 | 2019-12-27 | 南京天源重工设备有限公司 | Refrigeration heat exchanger convenient to scale removal |
| CN211601715U (en) * | 2019-12-31 | 2020-09-29 | 山东九泽换热系统有限公司 | Online cleaning device for heat exchanger |
| CN212512684U (en) * | 2020-06-28 | 2021-02-09 | 华能山东发电有限公司烟台发电厂 | Full-automatic on-line cleaning device for plate heat exchanger for heat supply network system |
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