CN109099758A - A kind of heat exchanger online backwashing system and purging method - Google Patents
A kind of heat exchanger online backwashing system and purging method Download PDFInfo
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- CN109099758A CN109099758A CN201811315108.4A CN201811315108A CN109099758A CN 109099758 A CN109099758 A CN 109099758A CN 201811315108 A CN201811315108 A CN 201811315108A CN 109099758 A CN109099758 A CN 109099758A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000011001 backwashing Methods 0.000 title claims abstract description 24
- 238000010926 purge Methods 0.000 title abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 116
- 238000004140 cleaning Methods 0.000 claims abstract description 50
- 238000005406 washing Methods 0.000 claims abstract description 10
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 238000011897 real-time detection Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 9
- 230000000717 retained effect Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 238000005352 clarification Methods 0.000 claims description 4
- 230000002045 lasting effect Effects 0.000 claims 1
- 239000012535 impurity Substances 0.000 abstract description 14
- 239000012530 fluid Substances 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000004080 punching Methods 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 3
- 239000013043 chemical agent Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000053 physical method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 210000004262 dental pulp cavity Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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 present invention relates to heat exchanger cleaning technique field, especially a kind of heat exchanger online backwashing system and purging method.Wherein system includes heat exchanger body, high-temperature inlet water pipe, high-temperature water outlet pipe, low temperature outlet pipe and low temperature water inlet pipe；High-temperature inlet water pipe is equipped with the first shut-off valve, first row air valve and first pressure gauge, and high-temperature water outlet pipe is equipped with the second shut-off valve, the first drain valve and second pressure gauge；Third shut-off valve, the second drain valve and third pressure gauge are housed on low temperature water inlet pipe, the 4th shut-off valve, second row air valve and the 4th pressure gauge are housed on low temperature outlet pipe.The present invention is by controlling each switch valve, exhaust valve and drain valve, the fluid of cooperation heat exchanger system on-line operation itself carries out inverse circulation and flows to high-speed punching washing scale and impurity on backing, it is not necessary that heat exchanger disintegrates, it is rinsed without external connection power or by chemical reagent；And without shutting down for a long time, removing and prevention fouling of heat exchangers can be effectively prevented from.
Description
Technical field
The present invention relates to heat exchanger cleaning technique field, especially a kind of heat exchanger online backwashing system and flushing side
Method.
Background technique
With the fast development of central heating and central air-conditioning, heat exchanger is increasingly used in heat exchange system
In.Since structure is complicated for heat exchanger inner flow passage, narrow space often will appear some blockings and fouling in heat exchanger use process
Problem.
But currently used several heat exchanger cleaning techniques in use there is a problem in that:
1, chemical cleaning method after heat exchanger disintegrates, using chemical immersion plate, is removed after dirt is dissolved,
This method needs to stop using heat exchanger for a long time, can not use during equipment is run, being used for a long time has one to equipment
Fixed corrosivity, once and leakage of medicament cleaning personnel may be damaged.
2, ablution in medical fluid injection heat exchanger will be cleaned using external device, this Method And Principle is by the broken of external force
Broken impact improves cleaning efficiency.Heat exchange such as the utility model patent of Patent No. (ZL201020129869.3), in the patent
Device cleaning technique is needed by external force, while being also to be cleaned by chemical agent.
3, after plate disintegrating, dirt is directly removed using hard object, this side is used for a long time and easily causes heat exchanger plate
Perforation, can not normal use.
4, the above method usually uses after finding heat exchanger fouling, does not have the effect of prevention fouling of heat exchangers,
And it needs to shut down for a long time.
5, since the exhaust pipe and tapping pipe bore very little installed on heat exchanger inlet and outlet pipeline in the prior art only have
DN15-20mm can not carry out blowdown；Meanwhile heat exchanger lacks the monitoring means of system at runtime, can not determine that it is stifled in time
Plug and fouled condition are cleared up in time；Moreover, in the prior art, the exhaust pipe installed on heat exchanger inlet and outlet pipeline and sluicing
Pipe generallys use a root canal road and links together, and concentration leads to discharge outlet, causes heat exchanger interior media can not emptying.It is above-mentioned to lack
It falls into and causes heat exchanger on-line cleaning difficult to realize and maintenance.
Summary of the invention
In view of the deficiency of the prior art, the purpose of the present invention is to provide one kind can be realized on-line cleaning,
And heat exchanger blocking and scaling degree can be found in time, and by dividing system running pressure setting and system operational parameters
Analysis, using physical method by the scale or impurity removal system of the also incomplete calcification being attached on heat exchanger heat-transfer surface, effectively
A kind of heat exchanger online backwashing system and purging method for preventing fouling of heat exchangers.
To achieve the goals above, first technical solution that the present invention uses are as follows:
A kind of heat exchanger online backwashing system, it includes heat exchanger body and is respectively arranged at heat exchanger body or so two
The high temperature lateral line and low temperature lateral line of side；The high temperature lateral line include be installed in respectively high temperature on the left of heat exchanger body into
The inner end of water pipe and high-temperature water outlet pipe, the high-temperature inlet water pipe is connected with the inner end of high-temperature water outlet pipe；The low temperature lateral line
Including the low temperature outlet pipe and low temperature water inlet pipe being installed on the right side of heat exchanger body respectively, the inner end of the low temperature water inlet pipe with it is low
The inner end of warm outlet pipe is connected；
First shut-off valve is installed on the high-temperature inlet water pipe, the second shut-off valve, institute are installed on the high-temperature water outlet pipe
It states on high-temperature inlet water pipe and first row air valve and first pressure gauge, institute is installed between the first shut-off valve and heat exchanger body
It states on high-temperature water outlet pipe and the first drain valve and second pressure gauge is installed between the second shut-off valve and heat exchanger body；
Third shut-off valve is installed on the low temperature water inlet pipe, the 4th shut-off valve, institute are installed on the low temperature outlet pipe
It states on low temperature water inlet pipe and the second drain valve and third pressure gauge, institute is installed between third shut-off valve and heat exchanger body
It states on low temperature outlet pipe and second row air valve and the 4th pressure gauge is installed between the 4th shut-off valve and heat exchanger body；
Be communicated with the first connecting tube between the first row air valve and second row air valve, one end of first connecting tube with
Drainage pipeline is connected, and the second connecting tube, second connecting tube are communicated between first drain valve and the second drain valve
One end be connected with drainage pipeline.
Preferably, the high-temperature inlet water pipe is installed in the upper end on the left of heat exchanger body, and the high-temperature water outlet pipe is installed in
Lower end on the left of heat exchanger body；The low temperature water inlet pipe be installed in the lower end on the right side of heat exchanger body and with high-temperature water outlet pipe pair
Bit distribution, the low temperature outlet pipe are installed in the upper end on the right side of heat exchanger body and with high-temperature inlet water pipe to bit distribution.
Preferably, be installed with the first differential pressure pick-up between the high-temperature inlet water pipe and high-temperature water outlet pipe, the low temperature into
The second differential pressure pick-up is installed between water pipe and low temperature outlet pipe.
Preferably, the first temperature is also equipped on the high-temperature water outlet pipe and between the second shut-off valve and heat exchanger body
Degree is counted or the first temperature sensor, is also equipped on the low temperature water inlet pipe and between third shut-off valve and heat exchanger body
Second temperature meter or second temperature sensor.
Preferably, the pipe diameter of first connecting tube and the second connecting tube is 32-40mm.
Second technical solution that the present invention uses are as follows:
A kind of heat exchanger online backflushing washing method, it includes heat exchanger online backwashing system, and the heat exchanger is anti-online
Rinse-system is a kind of above-mentioned heat exchanger online backwashing system, and the heat exchanger online backflushing washing method includes pipeline blockage
Detect alarming step, high temperature side pipeline-cleaning step and low temperature side pipeline-cleaning step；
The pipeline blockage detection alarming step includes establishing standard volume, and real-time detection reality corresponding with standard volume is joined
Number, when the actual parameter amount of being above standard certain proportion, sends corresponding pipeline blockage alarm signal, is alarmed according to pipeline blockage
High temperature side pipeline-cleaning step or low temperature side pipeline-cleaning step is individually performed in signal, or successively executes high temperature side pipeline-cleaning
Step and low temperature side pipeline-cleaning step；
The high temperature side pipeline-cleaning step includes:
Step A: closing the first shut-off valve and the second shut-off valve in high temperature lateral line, opens first row air valve and first and lets out
Water valve, the water whole emptying that will be retained in high temperature lateral line；
Step B: closing the first drain valve on high-temperature water outlet pipe, opens the second shut-off valve on high-temperature water outlet pipe rapidly,
The flushing pressure flushing flowed to the inverse circulation of the very fast flow velocity generated under higher pressure difference using water in high temperature lateral line is changed
Hot device, after water breakthrough in first row air valve, continual rinsing 30-50s, and the second shut-off valve is first closed after the completion of flushing, then beat
The first drain valve is opened, the water emptying that will be retained in high temperature lateral line；
Step C: the process of step B is repeated after the water flowed out in first row air valve becomes clarification, closes first
Drain valve；
Step D: slowly opening the second shut-off valve, first row air valve is closed after being full of water in high temperature lateral line, and open
First shut-off valve, to restore high temperature lateral line normal operation；
The low temperature side pipeline-cleaning step includes:
Step H: closing the third shut-off valve and the 4th shut-off valve in low temperature lateral line, opens second row air valve and second and lets out
Water valve, the water whole emptying that will be retained in low temperature lateral line；
Step I: closing the second drain valve on low temperature water inlet pipe, opens the 4th shut-off valve on low temperature outlet pipe rapidly,
It is rinsed with flushing pressure that the inverse circulation of the very fast flow velocity generated under higher pressure difference using water in low temperature lateral line is flowed to
Heat exchanger, after water breakthrough in second row air valve, continual rinsing 30-50s, and the 4th shut-off valve is first closed after the completion of flushing, then
The second drain valve is opened, the water emptying that will be retained in low temperature lateral line；
Step J: the process of step I is repeated after the water flowed out in second row air valve becomes clarification, closes second
Drain valve；
Step K: slowly opening the 4th shut-off valve, second row air valve is closed after being full of water in low temperature lateral line, and open
Third shut-off valve, to restore low temperature lateral line normal operation.
It preferably, further include executing step L before executing the step H in the low temperature side pipeline-cleaning step, it is described
Step L is the first shut-off valve and the second shut-off valve closed in high temperature lateral line；It further include executing step after executing the step K
Rapid M, the step M are the first shut-off valve and the second shut-off valve opened in high temperature lateral line, normal to restore high temperature lateral line
Operation.
Preferably, in pipeline blockage detection alarming step, with the first differential pressure pick-up and the second differential pressure pick-up
Parameter establishes corresponding standard volume respectively；
When the actual parameter of real-time detection to the first differential pressure pick-up is greater than corresponding standard volume certain proportion, send high
Warm lateral line alarm signal executes high temperature side pipeline-cleaning step according to high temperature lateral line alarm signal；
When the actual parameter of real-time detection to the second differential pressure pick-up is greater than corresponding standard volume certain proportion, send low
Warm lateral line alarm signal executes low temperature side pipeline-cleaning step according to low temperature lateral line alarm signal.
Preferably, in the pipeline blockage detection alarming step, with the first thermometer or the first temperature sensor and second
Difference between thermometer or second temperature sensor establishes standard volume, when the first thermometer of real-time detection or the first temperature sensing
When the actual parameter amount of being above standard certain proportion between device and second temperature meter or second temperature sensor, Tube Sheet of Heat Exchanger is sent
Road alarm signal successively executes high temperature side pipeline-cleaning step according to heat exchange manifold alarm signal and low temperature side pipeline-cleaning walks
Suddenly.
Preferably, the inverse circulation flow direction of water is rushed in the high temperature side pipeline-cleaning step and low temperature side pipeline-cleaning step
Pressure is washed to be all larger than equal to 0.2MPa.
As the above scheme is adopted, heat exchanger online backwashing system of the invention by by each switch valve,
Exhaust valve and drain valve are controlled, and the inverse circulation of fluid progress of cooperation heat exchanger system on-line operation itself flows to high-speed punching and washes
Scale and impurity on heat exchanger fin.Unlike existing heat-exchange system, first row air valve is equipped on high-temperature inlet water pipe, and
Second row air valve is equipped on low temperature outlet pipe, first row air valve and second row air valve pass through the first connecting tube and drainage pipeline phase
Connection；Simultaneously the first drain valve is installed on high-temperature water outlet pipe, and is equipped with the second drain valve on low temperature water inlet pipe, first lets out
Water valve and the second drain valve are connected by the second connecting tube with drainage pipeline.Based on above-mentioned heat exchanger online backwashing system,
Online side's purging method of the invention is in short time (3-5 by the side that in heat exchanger flushing process, heat exchanger is rinsed
Minute) shutdown status, without carrying out equipment disintegration, and the other side of heat exchanger still can operate normally, hardly right
Normal operation has an impact.Simultaneously the principle of the present invention be impurity by heat-exchange system pressure itself, inside heat exchanging device and
Rust deposite is rinsed, and without chemical agent, without in addition setting power source, each period that can be run in heat exchanger is real
It applies.Meanwhile each valve part of rinse-system can be used cooperatively with heat-exchange system existing facility.And backwash of the invention
Operation can use manual operation, heat exchanger interface Shuttoff Valve can also be transform as electronic Shuttoff Valve, by specific
Computer program carries out backwash operation automatically.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be defined by the claims
Implement with the multitude of different ways of covering.
As shown in Figure 1, a kind of heat exchanger online backwashing system provided in an embodiment of the present invention, it includes heat exchanger body
A and the high temperature lateral line and low temperature lateral line being respectively arranged at left and right sides of heat exchanger body a；Wherein high temperature lateral line includes point
The high-temperature inlet water pipe 1 and high-temperature water outlet pipe 2 not being installed on the left of heat exchanger body a, the inner end of high-temperature inlet water pipe 1 and high-temperature water outlet
The inner end of pipe 2 is connected；Low temperature lateral line include be installed in respectively low temperature outlet pipe 11 on the right side of heat exchanger body a and low temperature into
The inner end of water pipe 10, low temperature water inlet pipe 10 is connected with the inner end of low temperature outlet pipe 11；First is equipped on high-temperature inlet water pipe 1
Shut-off valve 3 is equipped with the second shut-off valve 4 on high-temperature water outlet pipe 2, on high-temperature inlet water pipe 1 and is located at the first shut-off valve 3 and changes
First row air valve 5 and first pressure gauge 6 are installed between hot device ontology a, on high-temperature water outlet pipe 2 and are located at the second shut-off valve 4
First drain valve 7 and second pressure gauge 8 are installed between heat exchanger body a；Third pass is installed on low temperature water inlet pipe 10
Disconnected valve 12, is equipped with the 4th shut-off valve 13 on low temperature outlet pipe 11, on low temperature water inlet pipe 10 and is located at third shut-off valve 12
Second drain valve 14 and third pressure gauge 15 are installed between heat exchanger body a, on low temperature outlet pipe 11 and are located at the 4th
Second row air valve 16 and the 4th pressure gauge 17 are installed between shut-off valve 13 and heat exchanger body a；In first row air valve 5 and second
The first connecting tube b is communicated between exhaust valve 16, one end of the first connecting tube b is connected with drainage pipeline d, in the first drain valve
7 and second are communicated with the second connecting tube c between drain valve 14, and one end of the second connecting tube c is connected with drainage pipeline d.
Unlike existing heat-exchange system, first row air valve 5 is equipped on high-temperature inlet water pipe 1, and be discharged in low temperature
Pipe 11 is equipped with second row air valve 16, and first row air valve 5 and second row air valve 16 pass through the first connecting tube b and drainage pipeline d phase
Connection；Simultaneously the first drain valve 7 is installed on high-temperature water outlet pipe 2, and is equipped with the second drain valve 14 on low temperature water inlet pipe 10,
First drain valve 7 and the second drain valve 14 are connected by the second connecting tube c with drainage pipeline d.It as a result, can be by opening each
It closes valve, exhaust valve and drain valve to be controlled, the fluid (such as water) of cooperation heat exchanger system on-line operation itself carries out inverse circulation
It flows to high-speed punching and washes scale and impurity on backing, it is not necessary that heat exchanger disintegrates, without external connection power or by change
Reagent is learned to be rinsed；And without shutting down for a long time, removing and prevention fouling of heat exchangers can be effectively prevented from.
Good heat transfer effect in order to obtain, the high-temperature inlet water pipe 1 of the present embodiment are installed in upper on the left of heat exchanger body a
End, high-temperature water outlet pipe 2 are installed in the lower end on the left of heat exchanger body a；Low temperature water inlet pipe 10 is installed on the right side of heat exchanger body a
Lower end and with high-temperature water outlet pipe 2 to bit distribution, low temperature outlet pipe 11 be installed in the upper end on the right side of heat exchanger body a and and high temperature into
Water pipe 1 is to bit distribution.The counterflow heat exchange between high temperature lateral line and low temperature lateral line can be formed as a result, i.e., in high temperature lateral line
In, the liquid in heat exchanger enters heat exchanger body a from the high-temperature inlet water pipe 1 on heat exchanger body top, after cooling, from lower part
2 outflow heat exchanger ontology a of high-temperature water outlet pipe；And in low temperature lateral line, liquid, which then enters from the low temperature water inlet pipe 10 of lower part, to exchange heat
Device ontology a, the 11 outflow heat exchanger ontology a of low temperature outlet pipe after heating, from top.
Further, it as first preferred embodiment, is filled between the high-temperature inlet water pipe 1 and high-temperature water outlet pipe 2 of the present embodiment
Equipped with the first differential pressure pick-up 19, the second differential pressure pick-up 20 is installed between low temperature water inlet pipe 10 and low temperature outlet pipe 11.Root
According to the analysis of heat exchanging device pressure parameter: plate heat exchanger is in normal operating condition, due to high temperature lateral line and low temperature side pipe
Flow in road meets design requirement, therefore the pressure loss of the medium in runner is substantially invariable；But if heat exchanger
There is scale or impurity in a side runner in ontology a, and when blocking runner, the resistance that liquid medium flows in the side runner is damaged
Mistake will greatly increase；When actual motion, when the differential pressure that differential pressure transmitter 19 or 20 measures on the inlet tube and outlet tube of heat exchanger side
Value, compared with the differential pressure standard volume of the side runner, deviation is greater than certain proportion (such as 30%), it can be determined that is the heat exchanger effluent
There is the case where blocking in road.The first differential pressure pick-up 19 or the real-time measured parameters of the second differential pressure pick-up 20 can be passed through as a result,
It compared with differential pressure standard volume, that is, can determine whether high temperature side pipeline or low temperature lateral line generate scale and impurity, i.e., whether occur
Blocking.
Further, as the second preferred embodiment, on the high-temperature water outlet pipe 2 of the present embodiment and it is located at the second shut-off valve 4
It is also equipped with the first thermometer or the first temperature sensor 9 between heat exchanger body a, on low temperature water inlet pipe 10 and is located at the
Second temperature meter or second temperature sensor 18 are also equipped between three shut-off valves 12 and heat exchanger body a.According to heat exchanging device
The analysis of temperature parameter: when plate heat exchanger is in normal operating condition, the flow of high temperature lateral line and low temperature lateral line is basic
Constant, heat exchanger temperature difference is also substantially invariable；It, should but if scale or impurity occurs in a certain side runner of heat exchanger
Rate-of flow in side runner will be reduced, and heat exchanger temperature difference is caused to change, i.e., high temperature side medium outlet temperature with
Low temperature side medium entrance temperature gap increases.When actual motion, when the first thermometer on high temperature side outlet pipe or the first temperature pass
Second temperature meter or the temperature gap of second temperature sensor 18 on sensor 9 and low temperature side water inlet pipe, with design standard temperature difference
It compares, deviation is greater than certain proportion (such as 60%), it can be determined that there is the case where blocking for heat exchanger.As a result, using first
The real-time measurement values of temperature gap between thermometer or the first temperature sensor 9 and second temperature meter or second temperature sensor 18
It compared with normal temperature difference, that is, can determine whether the pipeline in heat exchanger generates scale and impurity, i.e., whether block.This reality
It applies in the second pressure gauge 8 and low temperature side outlet pipe that can be also observed simultaneously in example on heat exchanger high temperature lateral line high temperature outlet pipe
4th pressure gauge 17 illustrates the side heat exchanger runner when the numerical value that wherein any one piece of pressure gauge is shown is lower than design pressure
It may be blocked.
Further, the pipe diameter of the first connecting tube b and the second connecting tube c of the present embodiment are 32-40mm.As a result,
Pipe diameter using the first connecting tube b and the second connecting tube c is not less than 32mm, the water that can will be retained in heat exchanger body a
Timely emptying, and by heat exchanger body a scale and impurity clear up away in time.
Based on above-mentioned heat exchanger online backwashing system, the embodiment of the invention also provides a kind of heat exchanger online backwashings
Method, it includes heat exchanger online backwashing system, and the heat exchanger online backwashing system is that a kind of above-mentioned heat exchanger exists
Line back-purge system, heat exchanger online backflushing washing method further include pipeline blockage detection alarming step, high temperature side pipeline-cleaning step
Rapid and low temperature side pipeline-cleaning step；
The pipeline blockage detection alarming step includes establishing standard volume, and real-time detection reality corresponding with standard volume is joined
Number, when the actual parameter amount of being above standard certain proportion, sends corresponding pipeline blockage alarm signal, is alarmed according to pipeline blockage
High temperature side pipeline-cleaning step or low temperature side pipeline-cleaning step is individually performed in signal, or successively executes high temperature side pipeline-cleaning
Step and low temperature side pipeline-cleaning step；
The high temperature side pipeline-cleaning step includes:
Step A: closing the first shut-off valve 3 and the second shut-off valve 4 in high temperature lateral line, opens first row air valve 5 and the
One drain valve 7, the water whole emptying that will be retained in high temperature lateral line；
Step B: closing the first drain valve 7 on high-temperature water outlet pipe, opens the second shut-off valve on high-temperature water outlet pipe rapidly
4, it is rinsed with the flushing pressure of the inverse circulation flow direction of the very fast flow velocity generated under higher pressure difference using water in high temperature lateral line
Heat exchanger, after water breakthrough in first row air valve 5, continual rinsing 30-50s, and the second shut-off valve 4 is first closed after the completion of flushing,
The first drain valve 7, the water emptying that will be retained in high temperature lateral line are opened again；
Step C: the process of step B is repeated after the water flowed out in first row air valve 5 becomes clarification, closes first
Drain valve 7；
Step D: slowly opening the second shut-off valve 4, first row air valve 5 is closed after being full of water in high temperature lateral line, and beat
The first shut-off valve 3 is opened, to restore high temperature lateral line normal operation.
The low temperature side pipeline-cleaning step includes:
Step H: closing the third shut-off valve 12 and the 4th shut-off valve 13 in low temperature lateral line, opens 17 He of second row air valve
Second drain valve 18, the water whole emptying that will be retained in low temperature lateral line；
Step I: closing the second drain valve 14 on low temperature water inlet pipe 10, and the 4th opened rapidly on low temperature outlet pipe 11 is closed
Disconnected valve 13, with the flushing pressure of the inverse circulation flow direction of the very fast flow velocity generated under higher pressure difference using water in low temperature lateral line
Carry out flushing heat exchanging device, after water breakthrough in second row air valve 16, continual rinsing 30-50s, and the 4th pass is first closed after the completion of flushing
Disconnected valve 13, then open the second drain valve 14, the water emptying that will be retained in low temperature lateral line；
Step J: after repeating the process of step I until the water that flows out becomes clarification in second row air valve 16, the is closed
Two drain valves 14；
Step K: when slowly open the 4th shut-off valve 13, after in low temperature lateral line be full of water after close second row air valve 16,
And third shut-off valve 12 is opened, to restore low temperature lateral line normal operation.
Based on arrangement above, either high temperature side pipeline-cleaning or low temperature side pipeline-cleaning, it is required to arrange when rinsing
Medium in empty heat exchanger.Inside heat exchanger during emptying, heat exchanger can be discharged with water flow in partial impurities, and emptying changes
After hot device, the impurity being adsorbed on plate can greatly reduce absorption of the impurity on plate due to drying out and drying shrinkage
Power.And the adverse current of heat exchanging device, due to heat exchanger inner flow passage structure winding complex, in proper flow state, is changed to flushing
Impurity inside hot device, which is once adsorbed on plate, the more to be pushed away the more tight by water flow, can not loosen discharge.Method of the present invention is using inverse
Flow direction is rinsed, and when the flow direction of medium in heat exchanger and contrary normal operation, is made in very high pressure and flow velocity
Under, after strongly washing away heat exchanger fin surface, it can make to be adsorbed on impurity on plate, continuous loose or dislocation.After heat exchanger emptying, lead to
Cross the water-filling into heat exchanger rapidly, manufacture high flow rate and steam-water mixing hits plate, generate powerful shock wave, accelerating impurity from
Peeling effect on plate, to reach good flushing effect.
The invention proposes a kind of methods for carrying out heat exchanger clean and maintenance using physical method online.That is, in heat exchanger
In flushing process, the side that heat exchanger is rinsed is in short time (3-5 minutes) shutdown status, without carrying out equipment disintegration, and
And the other side of heat exchanger still can operate normally, and hardly have an impact to normal operation.The principle of the present invention simultaneously
It is that impurity and rust deposite by heat-exchange system pressure itself, inside heat exchanging device is rinsed, without chemical agent, is not necessarily to
In addition power source is set, each period that can be run in heat exchanger implements.Meanwhile each valve part of rinse-system can be with
Heat-exchange system existing facility is used cooperatively.Backwash operation of the invention can use manual operation, heat exchanger can also be connect
Shuttoff Valve transform electronic Shuttoff Valve as at mouthful, by specific computer program, carries out backwash operation automatically.
Further, when rinsing low temperature lateral line, to avoid adhering on low-temperature side heat exchanger in the case where high temperature side toasts
Impurity is hardened, further includes executing step L before executing the step H in the low temperature side pipeline-cleaning step of the present embodiment, described
Step L is the first shut-off valve 3 and the second shut-off valve 4 closed in high temperature lateral line；It further include executing after executing the step K
Step M, the step M are the first shut-off valve 3 and the second shut-off valve 4 opened in high temperature lateral line, to restore high temperature lateral line
It operates normally.
Further, as first preferred embodiment, the pipeline blockage of the present embodiment is detected in alarming step, poor with first
The parameter of pressure sensor 19 and the second differential pressure pick-up 20 establishes corresponding standard volume respectively；When real-time detection is passed to the first differential pressure
When the actual parameter of sensor 19 is greater than corresponding standard volume certain proportion (such as 30%), high temperature lateral line alarm signal, root are sent
High temperature side pipeline-cleaning step is executed according to high temperature lateral line alarm signal；When real-time detection to the reality of the second differential pressure pick-up 20
When parameter is greater than corresponding standard volume certain proportion, low temperature lateral line alarm signal is sent, according to low temperature lateral line alarm signal
Execute low temperature side pipeline-cleaning step.
Further, as the second preferred embodiment, the pipeline blockage of the present embodiment is detected in alarming step, with the first temperature
Degree meter or the difference between the first temperature sensor 9 and second temperature meter or second temperature sensor 18 establish standard volume, work as reality
When detect actual parameter between the first thermometer or the first temperature sensor 9 and second temperature meter or second temperature sensor 18
When the amount of being above standard certain proportion (such as 60%), send heat exchange manifold alarm signal, according to heat exchange manifold alarm signal according to
Secondary execution high temperature side pipeline-cleaning step and low temperature side pipeline-cleaning step.
Further, in the high temperature side pipeline-cleaning step of the present embodiment and low temperature side pipeline-cleaning step water inverse circulation
The flushing pressure of flow direction is all larger than equal to 0.2MPa.It needs to set flushing pressure when rinsing.After impurity falls off, only
It after flow velocity is greater than the suspension flow velocity of impurity inside heat exchanger, could be taken away by water flow, heat exchanger is discharged.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (10)
1. a kind of heat exchanger online backwashing system, it is characterised in that: it includes heat exchanger body and is respectively arranged at heat exchanger
High temperature lateral line and low temperature lateral line at left and right sides of ontology；The high temperature lateral line includes being installed in a heat exchanger body left side respectively
The high-temperature inlet water pipe and high-temperature water outlet pipe of side, the inner end of the high-temperature inlet water pipe are connected with the inner end of high-temperature water outlet pipe；It is described
Low temperature lateral line includes the low temperature outlet pipe and low temperature water inlet pipe being installed on the right side of heat exchanger body respectively, the low temperature water inlet pipe
Inner end be connected with the inner end of low temperature outlet pipe；
First shut-off valve is installed on the high-temperature inlet water pipe, the second shut-off valve, the height are installed on the high-temperature water outlet pipe
First row air valve and first pressure gauge, the height are installed in warm water pipe and between the first shut-off valve and heat exchanger body
First drain valve and second pressure gauge are installed on warm outlet pipe and between the second shut-off valve and heat exchanger body；
Third shut-off valve is installed on the low temperature water inlet pipe, the 4th shut-off valve is installed on the low temperature outlet pipe, it is described low
Second drain valve and third pressure gauge are installed in warm water pipe and between third shut-off valve and heat exchanger body, it is described low
Second row air valve and the 4th pressure gauge are installed on warm outlet pipe and between the 4th shut-off valve and heat exchanger body；
The first connecting tube, one end of first connecting tube and draining are communicated between the first row air valve and second row air valve
Pipeline is connected, and is communicated with the second connecting tube between first drain valve and the second drain valve, and the one of second connecting tube
End is connected with drainage pipeline.
2. a kind of heat exchanger online backwashing system as described in claim 1, it is characterised in that: the high-temperature inlet water pipe installing
Upper end on the left of heat exchanger body, the high-temperature water outlet pipe are installed in the lower end on the left of heat exchanger body；The low temperature water inlet
Pipe is installed in the lower end on the right side of heat exchanger body and with high-temperature water outlet pipe to bit distribution, and the low temperature outlet pipe is installed in heat exchanger
Upper end on the right side of ontology and with high-temperature inlet water pipe to bit distribution.
3. a kind of heat exchanger online backwashing system as described in claim 1, it is characterised in that: the high-temperature inlet water pipe and height
It is installed with the first differential pressure pick-up between warm outlet pipe, is installed with the second differential pressure between the low temperature water inlet pipe and low temperature outlet pipe
Sensor.
4. a kind of heat exchanger online backwashing system as described in claim 1, it is characterised in that: on the high-temperature water outlet pipe and
The first thermometer or the first temperature sensor, the low temperature water inlet are also equipped between the second shut-off valve and heat exchanger body
Second temperature meter or second temperature sensor are also equipped on pipe and between third shut-off valve and heat exchanger body.
5. a kind of heat exchanger online backwashing system as described in claim 1, it is characterised in that: first connecting tube and the
The pipe diameter of two connecting tubes is 32-40mm.
6. a kind of heat exchanger online backflushing washing method, it is characterised in that: it includes heat exchanger online backwashing system, the heat exchange
Device online backwashing system is a kind of heat exchanger online backwashing system of any of claims 1-4, the heat exchange
Device online backflushing washing method includes pipeline blockage detection alarming step, high temperature side pipeline-cleaning step and low temperature side pipeline-cleaning
Step；
The pipeline blockage detection alarming step includes establishing standard volume, and real-time detection actual parameter corresponding with standard volume,
When the actual parameter amount of being above standard certain proportion, corresponding pipeline blockage alarm signal is sent, according to pipeline blockage alarm signal
Number, high temperature side pipeline-cleaning step or low temperature side pipeline-cleaning step is individually performed, or successively execute high temperature side pipeline-cleaning step
Rapid and low temperature side pipeline-cleaning step；
The high temperature side pipeline-cleaning step includes:
Step A: closing the first shut-off valve and the second shut-off valve in high temperature lateral line, opens first row air valve and first and sluices
Valve, the water whole emptying that will be retained in high temperature lateral line；
Step B: closing the first drain valve on high-temperature water outlet pipe, opens the second shut-off valve on high-temperature water outlet pipe, rapidly with benefit
It is lasting to rush after water breakthrough in first row air valve with the flushing pressure flushing heat exchanging device of the inverse circulation flow direction of water in high temperature lateral line
30-50s is washed, and first closes the second shut-off valve after the completion of flushing, then opens the first drain valve, will be retained in high temperature lateral line
Water emptying；
Step C: the process of step B is repeated after the water flowed out in first row air valve becomes clarification, first is closed and sluices
Valve；
Step D: slowly opening the second shut-off valve, first row air valve is closed after being full of water in high temperature lateral line, and open first
Shut-off valve, to restore high temperature lateral line normal operation；
The low temperature side pipeline-cleaning step includes:
Step H: closing the third shut-off valve and the 4th shut-off valve in low temperature lateral line, opens second row air valve and second and sluices
Valve, the water whole emptying that will be retained in low temperature lateral line；
Step I: closing the second drain valve on low temperature outlet pipe, opens the 4th shut-off valve on low temperature outlet pipe, rapidly with benefit
With the flushing pressure of the inverse circulation flow direction of water in low temperature lateral line come flushing heat exchanging device, after water breakthrough in second row air valve, continue
30-50s is rinsed, and first closes the 4th shut-off valve after the completion of flushing, then open the second drain valve, will be stayed in low temperature lateral line
The water emptying deposited；
Step J: the process of step I is repeated after the water flowed out in second row air valve becomes clarification, second is closed and sluices
Valve；
Step K: slowly opening the 4th shut-off valve, second row air valve is closed after being full of water in low temperature lateral line, and open third
Shut-off valve, to restore low temperature lateral line normal operation.
7. a kind of heat exchanger online backwashing system as claimed in claim 6, it is characterised in that: the low temperature side pipeline-cleaning
It further include executing step L before executing the step H in step, the step L is the first shutdown closed in high temperature lateral line
Valve and the second shut-off valve；It further include executing step M after executing the step K, the step M is to open in high temperature lateral line
First shut-off valve and the second shut-off valve, to restore high temperature lateral line normal operation.
8. a kind of heat exchanger online backflushing washing method as claimed in claim 6, it is characterised in that: the pipeline blockage detection report
In alert step, corresponding standard volume is established respectively with the parameter of the first differential pressure pick-up and the second differential pressure pick-up；
When the actual parameter of real-time detection to the first differential pressure pick-up is greater than corresponding standard volume certain proportion, high temperature side is sent
Pipeline alarm signal executes high temperature side pipeline-cleaning step according to high temperature lateral line alarm signal；
When the actual parameter of real-time detection to the second differential pressure pick-up is greater than corresponding standard volume certain proportion, low temperature side is sent
Pipeline alarm signal executes low temperature side pipeline-cleaning step according to low temperature lateral line alarm signal.
9. a kind of heat exchanger online backflushing washing method as claimed in claim 6, it is characterised in that: the pipeline blockage detection report
In alert step, the difference in terms of the first thermometer or the first temperature sensor and second temperature or between second temperature sensor is built
Vertical standard volume, when between the first thermometer of real-time detection or the first temperature sensor and second temperature meter or second temperature sensor
The actual parameter amount of being above standard certain proportion when, send heat exchange manifold alarm signal, according to heat exchange manifold alarm signal
Successively execute high temperature side pipeline-cleaning step and low temperature side pipeline-cleaning step.
10. a kind of heat exchanger online backflushing washing method as claimed in claim 6, it is characterised in that: the high temperature lateral line is clear
The flushing pressure for washing the inverse circulation flow direction of water in step and low temperature side pipeline-cleaning step is all larger than equal to 0.2MPa.
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