CN211601712U - Novel plate heat exchanger washs device - Google Patents
Novel plate heat exchanger washs device Download PDFInfo
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- CN211601712U CN211601712U CN201921744054.3U CN201921744054U CN211601712U CN 211601712 U CN211601712 U CN 211601712U CN 201921744054 U CN201921744054 U CN 201921744054U CN 211601712 U CN211601712 U CN 211601712U
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- heat exchanger
- plate heat
- cleaning
- outlet
- pipeline
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Abstract
The utility model relates to a novel plate heat exchanger cleaning device, which comprises a clean water tank, wherein the clean water tank is connected with a liquid inlet of a plate heat exchanger to be cleaned through a cleaning liquid inlet pipeline and is connected with a liquid outlet of the plate heat exchanger to be cleaned through a cleaning liquid return pipeline; the cleaning liquid inlet pipeline is provided with a chemical cleaning pump, the inlet of the chemical cleaning pump is connected with the water outlet of the clean water tank, and the outlet of the chemical cleaning pump is connected with the liquid inlet of the plate heat exchanger to be cleaned; the inlet and the outlet of the chemical cleaning pump are connected through a recirculation pipeline; the recycling pipeline is connected with a spraying doser, the inlet of the spraying doser is connected with the water outlet of the clean water tank through the recycling pipeline, and the outlet of the spraying doser is connected with the liquid inlet of the plate heat exchanger to be cleaned through the recycling pipeline. The utility model discloses under the condition of not dismantling plate heat exchanger, wash plate heat exchanger, the clearance calcium magnesium scale that can be fine to save time makes the heat exchanger reach anticipated heat transfer ability.
Description
Technical Field
The utility model discloses heat exchanger washs technical field, especially relates to a novel plate heat exchanger washs device.
Background
The evaporative concentration crystallization technology (MVR) adopted by the desulfurization wastewater zero-discharge process mainly comprises three units of pretreatment, evaporative concentration, crystallization and the like. The plate heat exchanger exchanges heat and heats the effluent of the pretreatment system. The effluent of the pretreatment system contains calcium, magnesium, iron and other ions. The ions form corresponding calcium, magnesium and iron salts in water, such as CaCO3、Ca(HCO3)2、CaSO4、Mg(HCO3)2、MgCO3、MgSO4、Mg(OH)2And the like. Calcium salts are the main component responsible for fouling of heat exchangers. After magnesium is dissolved in water, Mg (OH)2 precipitates are generated after thermal decomposition, and sludge or scale is formed. With some iron oxide attached. The thickness of calcium and magnesium scales is increased, the thermal resistance of the heat exchanger is obviously increased, and the heat transfer efficiency is obviously reduced; after scaling, the flow area of the fluid is reduced, so that equipment is blocked, and the energy consumption of the water pump is increased; the scale layer is deposited on the heat exchange surface, and hot spot corrosion under the scale is easy to occur, so that the heat exchange surface is perforated, the safety of equipment is damaged, and accidents are easy to cause. Due to the fact thatTherefore, the machine is difficult to clean.
The existing cleaning method of the plate heat exchanger is to disassemble the plate heat exchanger manually, then to wash the plate by high pressure water, and then to reinstall the system. The treatment difficulty is high, the descaling effect is poor, and organic scale is difficult to remove. The cleaning method has the advantages of large workload, long time and poor labor condition, and easily causes certain influence on the installation clearance and the equipment performance of the equipment in the dismounting and reinstalling processes, thereby influencing the installation precision and the service life of the equipment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel plate heat exchanger washs device under the condition of not dismantling plate heat exchanger, washs plate heat exchanger, the clearance calcium magnesium scale that can be fine to save time, make the heat exchanger reach anticipated heat transfer ability.
The utility model provides a novel cleaning device for a plate heat exchanger, which comprises a clean water tank, wherein the clean water tank is connected with a liquid inlet of the plate heat exchanger to be cleaned through a cleaning liquid inlet pipeline and is connected with a liquid outlet of the plate heat exchanger to be cleaned through a cleaning liquid return pipeline;
the cleaning liquid inlet pipeline is provided with a chemical cleaning pump, the inlet of the chemical cleaning pump is connected with the water outlet of the clean water tank, and the outlet of the chemical cleaning pump is connected with the liquid inlet of the plate heat exchanger to be cleaned; the inlet and the outlet of the chemical cleaning pump are connected through a recirculation pipeline; the recycling pipeline is connected with a spraying doser, the inlet of the spraying doser is connected with the water outlet of the clean water tank through the recycling pipeline, and the outlet of the spraying doser is connected with the liquid inlet of the plate heat exchanger to be cleaned through the recycling pipeline.
Furthermore, an electric heater, a thermometer and a liquid level switch are arranged in the clear water tank.
Further, the liquid level switch is a magnetic turning plate liquid level meter.
Furthermore, a thermometer and a pH meter are arranged on the cleaning liquid inlet pipeline.
Furthermore, filter screens are arranged at the inlet of the chemical cleaning pump and the inlet of the injection doser.
Further, the cleaning liquid inlet pipeline is provided with a flowmeter.
Further, the outlet of the chemical cleaning pump is provided with a cleaning pump outlet valve.
Further, the recirculation pipeline is provided with a cleaning pump outlet check valve.
Further, the cleaning box is arranged on the movable trolley through the cleaning box fixing base.
Furthermore, the clear water tank is provided with a waste water discharge pipeline.
Borrow by above-mentioned scheme, through novel plate heat exchanger belt cleaning device, under the condition of not dismantling plate heat exchanger, wash plate heat exchanger, the clearance calcium magnesium scale that can be fine to save time makes the heat exchanger reach anticipated heat transfer ability.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is the structure schematic diagram of the novel plate heat exchanger cleaning device of the present invention.
Reference numbers in the figures:
1-a clear water tank; 11-an electric heater; 12-a liquid level switch; 13-a waste water discharge line;
2-cleaning a liquid inlet pipeline; 21-pumping in a chemical cleaning pump; 22-a recirculation line; 23-jet dosers; 24-purging the pump outlet valve; 25-cleaning an outlet check valve of the pump; 26-a flow meter;
3-a plate heat exchanger to be cleaned;
4-cleaning the liquid return pipeline.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, the present embodiment provides a novel cleaning device for a plate heat exchanger, which includes a clean water tank 1, wherein the clean water tank 1 is connected to a liquid inlet of a plate heat exchanger 3 to be cleaned through a cleaning liquid inlet pipeline 2 (cleaning hose), and is connected to a liquid outlet of the plate heat exchanger 3 to be cleaned through a cleaning liquid return pipeline 4 (cleaning hose);
the cleaning liquid inlet pipeline 2 is provided with a chemical cleaning pump 21, the inlet of the chemical cleaning pump 21 is connected with the water outlet of the clean water tank 1, and the outlet is connected with the liquid inlet of the plate heat exchanger 3 to be cleaned; the inlet and outlet of the chemical cleaning pump 21 are connected through a recirculation pipeline 22; the recirculation pipeline 22 is connected with an injection doser 23, the inlet of the injection doser 23 is connected with the water outlet of the clean water tank 1 through the recirculation pipeline 22, and the outlet of the injection doser 23 is connected with the liquid inlet of the plate heat exchanger 3 to be cleaned through the recirculation pipeline 22.
Through the plate heat exchanger cleaning device, a cleaning circulating system is formed, chemical cleaning agents (different cleaning solvents can be adopted according to different scale sample components) are controlled to be added, the temperature and the concentration of the cleaning solution are controlled, and a corrosion inhibitor with a certain concentration is added; controlling the cleaning flow rate of the heat exchanger; and soaking and cleaning; and (5) circularly cleaning. The plate heat exchanger can be cleaned without disassembling the plate heat exchanger, calcium and magnesium scale can be well removed, time is saved, and the heat exchanger can achieve expected heat exchange capacity. The medicine is added through an external medicine adding system (a chemical cleaning pump, a recirculation pipeline and a jet medicine adding device), so that the medicine can be better dissolved, the medicine adding concentration is controlled, and the small concentration deviation of the medicine in the system is ensured. The whole cleaning device adopts circulating cleaning, and scales can be cleaned after the whole cleaning loop is maintained for 3-4h during cleaning.
This plate heat exchanger belt cleaning device adopts the recirculation of scavenging pump as the power supply of adding the medicine sprayer, need not to dispose the agitator, has solved the inhomogeneous problem of stirring, has saved the medicine, has realized evenly dispensing through recirculation.
In the present embodiment, an electric heater 11, a thermometer, and a liquid level switch 12 are provided in the clean water tank 1.
In the present embodiment, the level switch 12 is a magnetic flip-flop level gauge.
In this embodiment, the cleaning liquid inlet pipe 2 is provided with a thermometer and a pH meter.
In this embodiment, the chemical cleaning pump 21 inlet and the spray doser 23 inlet are provided with a filter screen.
In the present embodiment, the cleaning liquid feed line 2 is provided with a flow meter 26.
In this embodiment, the outlet of the chemical cleaning pump 21 is provided with a cleaning pump outlet valve 24.
In this embodiment the recirculation line 22 is provided with a purge pump outlet check valve 25.
In this embodiment, the cleaning tank 1 is placed on the moving trolley through the cleaning tank fixing base, and the trolley is pulled to move through the moving trolley handle.
In the present embodiment, the clean water tank 1 is provided with a waste water discharge line 13.
The step of cleaning the heat exchanger by using the cleaning device comprises the following steps:
1) and pushing the movable plate heat exchanger device to a corresponding position, and connecting the cleaning liquid inlet pipeline 2 and the cleaning liquid return pipeline 4 to form a temporary chemical cleaning system.
2) And opening a water inlet valve of the clean water tank 1, supplementing demineralized water to submerge a liquid level switch, and stopping supplementing a water source when the liquid level reaches a proper position.
3) The electric heater 11 is started to heat, and the temperature of the clear water tank 1 is raised to the temperature required by the liquid medicine.
4) And starting the chemical cleaning pump 21 to form a cleaning circulation loop with the plate heat exchanger 3 to be cleaned, and heating the whole system to a proper temperature.
5) A suitable corrosion inhibitor is added.
6) According to the analysis of the scale sample, the pickling is started by adding a suitable pickling medium through the spray doser 23, and the electric heater 11 is stopped or started according to the system temperature.
7) And comprehensively considering the pickling end time according to the residual concentration and the pH value of the pickling acid solution.
According to the chemical cleaning guide of a thermal power plant DL/T794-2012, the cleaning agents are sulfamic acid, hydrochloric acid and formic acid (acetic acid) for cleaning, and the concentration is determined as follows:
chemical cleaning agent proportioning
| Cleaning agent | Concentration of | Corrosion inhibitor | Cleaning temperature | Remarks for |
| HCl | ||||
| 3％-5％ | Lan-826 | 30℃-50℃ | Need to be equipped with an acid mist | |
| Sulfamic acid | ||||
| 3％-5％ | Special corrosion inhibitor | 30℃-50℃ | Calcium magnesium | |
| Sodium hydroxide | ||||
| 3％-4％ | / | 30℃-50℃ | Organic scale | |
| High- |
3％-6％ | / | 30℃-60℃ | Oil stain |
Through this belt cleaning device, can avoid heat exchanger scale deposit to block up the back, need frequently to carry out the repetitive work of operation → jam → washing → operation during the operation, effectively solve the problem that the heat exchanger scale deposit leads to the system to stop the operation, improved the validity, the security and the economic nature of system operation, specifically include following technological effect:
1. the movable trolley and the movable cleaning hose are connected with the cleaning interface of the heat exchanger, so that the cleaning requirement of the plate heat exchanger at multiple positions can be met, and convenience and rapidness are realized;
2. the heat exchanger can be integrally and circularly cleaned, and compared with the traditional mechanical disassembly cleaning, the heat exchanger is more time-saving, trouble-saving and labor-saving and has higher working efficiency;
3. selecting sulfamic acid for cleaning according to the requirements of industrial standards and the actual conditions of equipment, wherein the cleaning parameters meet the standard requirements, the cleaning effect is excellent, and the safety is sufficiently guaranteed;
4. the method has the advantages that the actual requirements of the field process are combined, the manufacturing cost is low, the occupied area is small, the structure is compact and light, the recycling value is high, the operability is strong, the effect is good, the method can be developed and applied in systems of the same type, the economic benefit prospect is good, the investment is small, and the return is large;
5. by installing the filter screen, solid impurities can be prevented from entering the heat exchanger system to cause damage to the heat exchanger, and the safety and the reliability of the cleaning system are improved;
6. the cleaning effect is good, the equipment can continue to operate well after cleaning, the operation period of the equipment is prolonged, the equipment replacement cost is saved, and the problem that the system is frequently stopped due to poor water quality is effectively solved.
7. The medicine adding system of the cleaning device utilizes the recirculation of the chemical cleaning pump to provide power, uses the suction capacity of the injection medicine adding device as a dissolving and stirring medicine, can calculate the medicine adding concentration according to the water flow, better realizes the full-effect utilization of the medicine, does not waste the medicine, has more accurate concentration, and prevents the precipitation caused by too large medicine adding amount.
8. The arrangement of the electric heater, the thermometer and the liquid level switch can ensure the safety and the economical efficiency of the chemical cleaning box during heating.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A novel cleaning device for a plate heat exchanger is characterized by comprising a clean water tank, wherein the clean water tank is connected with a liquid inlet of the plate heat exchanger to be cleaned through a cleaning liquid inlet pipeline and is connected with a liquid outlet of the plate heat exchanger to be cleaned through a cleaning liquid return pipeline;
the cleaning liquid inlet pipeline is provided with a chemical cleaning pump, the inlet of the chemical cleaning pump is connected with the water outlet of the clean water tank, and the outlet of the chemical cleaning pump is connected with the liquid inlet of the plate heat exchanger to be cleaned; the inlet and the outlet of the chemical cleaning pump are connected through a recirculation pipeline; the recycling pipeline is connected with a spraying doser, the inlet of the spraying doser is connected with the water outlet of the clean water tank through the recycling pipeline, and the outlet of the spraying doser is connected with the liquid inlet of the plate heat exchanger to be cleaned through the recycling pipeline.
2. The novel cleaning device for the plate heat exchanger as claimed in claim 1, wherein an electric heater, a thermometer and a liquid level switch are arranged in the clean water tank.
3. The novel cleaning device for the plate heat exchanger according to claim 2, wherein the liquid level switch is a magnetic flip plate liquid level meter.
4. The novel cleaning device for the plate heat exchanger according to claim 1, wherein the cleaning liquid inlet pipeline is provided with a thermometer and a pH meter.
5. The novel cleaning device for the plate heat exchanger according to claim 1, wherein the chemical cleaning pump inlet and the injection doser inlet are provided with filter screens.
6. The novel cleaning device for the plate heat exchanger according to claim 1, characterized in that the cleaning liquid inlet pipeline is provided with a flow meter.
7. The novel plate heat exchanger cleaning device according to claim 1, characterized in that the outlet of the chemical cleaning pump is provided with a cleaning pump outlet valve.
8. The novel plate heat exchanger cleaning device according to claim 1, characterized in that the recirculation line is provided with a cleaning pump outlet check valve.
9. The novel cleaning device for the plate heat exchanger according to claim 1, wherein the clean water tank is placed on the moving trolley through a cleaning tank fixing base.
10. A novel plate heat exchanger washing device according to claim 2, characterized in that the clean water tank is provided with a waste water discharge line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921744054.3U CN211601712U (en) | 2019-10-17 | 2019-10-17 | Novel plate heat exchanger washs device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921744054.3U CN211601712U (en) | 2019-10-17 | 2019-10-17 | Novel plate heat exchanger washs device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211601712U true CN211601712U (en) | 2020-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921744054.3U Expired - Fee Related CN211601712U (en) | 2019-10-17 | 2019-10-17 | Novel plate heat exchanger washs device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211601712U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378287A (en) * | 2020-11-16 | 2021-02-19 | 中国石油天然气集团有限公司 | Hot washing device for heat exchanger containing oil medium |
| CN116892845A (en) * | 2023-07-11 | 2023-10-17 | 山东博宇重工科技集团有限公司 | Fin tube heat exchanger with vortex generator |
-
2019
- 2019-10-17 CN CN201921744054.3U patent/CN211601712U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112378287A (en) * | 2020-11-16 | 2021-02-19 | 中国石油天然气集团有限公司 | Hot washing device for heat exchanger containing oil medium |
| CN116892845A (en) * | 2023-07-11 | 2023-10-17 | 山东博宇重工科技集团有限公司 | Fin tube heat exchanger with vortex generator |
| CN116892845B (en) * | 2023-07-11 | 2024-03-08 | 山东博宇重工科技集团有限公司 | Fin tube heat exchanger with vortex generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200929 |