阅读说明：本技术 换热管在线检漏装置及其在线检漏方法 (The online leakage detection apparatus of heat exchanger tube and its online leak hunting method ) 是由 张添 张丽彬 姜峰 于 2019-09-30 设计创作，主要内容包括：本发明公开了换热管在线检漏装置及其在线检漏方法。换热管在线检漏装置包括换热器、主机、报警器、湿度传感器和信号放大器。换热器包括外壳和热管,外壳内设有安装空间,热管固装在外壳之安装空间内。外壳还设有多个贯穿安装空间内外的安装孔,多个安装孔沿外壳轴向间隔布置,每个安装孔上都安装有上述的湿度传感器；信号放大器与湿度传感器连接,主机与信号放大器连接以获实时湿度值,主机设定湿度报警阀值且依据实时湿度值和湿度报警阀值判断是否产生报警指令,若产生报警指令则传送给报警器以使报警器发出报警信号。它具有如下优点：通过湿度信号检漏,能及时判断热管是否泄露,在泄漏时及时提醒维护人员采取相应措施。(The invention discloses the online leakage detection apparatus of heat exchanger tube and its online leak hunting methods.The online leakage detection apparatus of heat exchanger tube includes heat exchanger, host, alarm, humidity sensor and signal amplifier.Heat exchanger includes shell and heat pipe, is equipped with installation space in shell, heat pipe is packed in the installation space of shell.Shell is additionally provided with multiple mounting holes inside and outside installation space, and multiple mounting holes are fitted with above-mentioned humidity sensor in shell axial direction arranged for interval, each mounting hole；Signal amplifier is connect with humidity sensor, host is connect to obtain real-time wet angle value with signal amplifier, host setting humidity alarm threshold values and judge whether to generate alarm command according to real-time wet angle value and humidity alarm threshold values, if generating alarm command sends alarm to so that alarm sending alarm signal.It it has the following advantages: hunting leak by moisture signal, can judge in time whether heat pipe is revealed, remind maintenance personnel to take corresponding measure in time in leakage.)

1. the online leakage detection apparatus of heat exchanger tube, including heat exchanger, host and alarm, the heat exchanger includes shell and heat pipe, institute It states and is equipped with installation space in shell, the heat pipe is packed in the installation space of shell, and the host connects alarm；Its feature It is: further includes humidity sensor and signal amplifier；The shell is additionally provided with multiple mounting holes inside and outside installation space, The multiple mounting hole is fitted with above-mentioned humidity sensor in shell axial direction arranged for interval, each mounting hole；Institute It states signal amplifier to connect with humidity sensor, the host is connect to obtain real-time wet angle value, the host with signal amplifier It sets humidity alarm threshold values and judges whether to generate alarm command according to real-time wet angle value and humidity alarm threshold values, if generating alarm Instruction then sends alarm to so that alarm issues alarm signal.

2. the online leakage detection apparatus of heat exchanger tube according to claim 1, it is characterised in that: the multiple mounting hole is along enclosure axis It is arranged to uniform intervals.

3. the online leakage detection apparatus of heat exchanger tube according to claim 1, it is characterised in that: the heat pipe is located among heat exchanger Axis.

4. the online leakage detection apparatus of heat exchanger tube according to claim 1, it is characterised in that: the humidity sensor is from shell It is placed in and is fixed on inside heat exchanger in mounting hole.

5. the online leakage detection apparatus of heat exchanger tube according to claim 1, it is characterised in that: it further include display, the host It is connected with display with the humidity of different parts in real-time display heat exchanger.

6. the online leakage detection apparatus of heat exchanger tube according to claim 1, it is characterised in that: per adjacent in the multiple mounting hole The spacing of two mounting holes is 0.5~2m.

7. the online leakage detection apparatus of heat exchanger tube according to claim 1, it is characterised in that: each described humidity sensor It is equipped with an above-mentioned alarm.

8. the online leak hunting method of the online leakage detection apparatus of heat exchanger tube according to claim 2, it is characterised in that: include:

Step 1, the humidity sensor of multiple mounting holes is all sequentially composed of number, and humidity sensor obtains real-time humidity signal；

Step 2, signal amplifier connects humidity sensor to amplify real-time humidity signal；

Step 3, host obtains real-time humidity signal and generates real-time wet angle value, sentences according to real-time wet angle value and humidity alarm threshold values It is disconnected whether to generate alarm command, alarm is transferred to if generating alarm command so that alarm issues alarm signal.

9. the online leak hunting method of heat exchanger tube according to claim 8, it is characterised in that: each humidity sensor is matched Equipped with an alarm；

The step 3 includes:

Step 31, host obtains real-time humidity signal and generates real-time wet angle value；

Step 32, judge the real-time wet angle value of the humidity sensor of adjacent two number along the high-temperature gas flowing direction of heat exchanger Difference whether be greater than humidity alarm threshold values, if more than alarm command is then generated, above-mentioned adjacent two number is i and i-1, will be alarmed Instruction sends i number to or/and i-1 numbers corresponding alarm.

Technical field

The present invention relates to fever technical field of power generation more particularly to a kind of online leakage detection apparatus of heat exchanger tube and its online leak detections Method.

Background technique

Heat exchanger tube is the important component of UTILIZATION OF VESIDUAL HEAT IN low temperature electric precipitator, is generally disposed at boiler air preheater and is exported to electricity and removes In dirt device flue or at deduster import loudspeaker, heat transferring medium is mesolow water, to absorb flue gas waste heat at the end of boiler.Due to Heat exchanger tube is completely encapsulated in loudspeaker or flue, and interior humidity need to maintain a very low state to heat-exchanger rig at work, is changed Breakage on heat pipe will lead to the leakage of the water in water pipe, can substantially change heat-exchanger rig interior humidity, if there is leak, not only shadow Equipment operation is rung, the water leaked when more serious can flow into other electrical equipments, such as electric precipitator, will cause in electric duster ash bucket The stifled ash of accumulated ash into lump, ash bucket, the defeated ash of ash-transmission system are unsmooth, and then threaten electric precipitator safety.In view of the above technical problems, Chinese Patent database discloses: 1, the patent application of CN102967420A, and the online leakage detection apparatus of the heat exchanger tube of the patent application is logical The sound of the intensity and frequency anomaly that generate when detection leakage is crossed to predict whether that leakage will be generated；2, CN100529706B is used In the on-line checking of pipe heat exchanger leakage point and the device of prevention leakage, whether it generates leakage using pressure differential detection；3, CN104949806A, a kind of heat recovery heat exchanger leak detection apparatus, it detects whether to generate leakage using current method；It is above-mentioned Solution the device is complicated, and its prejudge result lack whether reliable data confirm that heat pipe is revealed in the recent period.

Summary of the invention

The present invention provides the online leakage detection apparatus of heat exchanger tube and its online leak hunting methods, and which overcome exchange heat in background technique Deficiency present in pipe leakage detection apparatus.

The present invention solve the used technical solution of its technical problem first is that:

The online leakage detection apparatus of heat exchanger tube, including heat exchanger, host and alarm, the heat exchanger include shell and heat pipe, Installation space is equipped in the shell, the heat pipe is packed in the installation space of shell, and the host connects alarm；Also wrap Include humidity sensor and signal amplifier；The shell is additionally provided with multiple mounting holes inside and outside installation space, the multiple Mounting hole is fitted with above-mentioned humidity sensor in shell axial direction arranged for interval, each mounting hole；The signal is put Big device is connect with humidity sensor, and the host is connect to obtain real-time wet angle value, the host setting humidity with signal amplifier Alarming threshold value and according to real-time wet angle value and humidity alarm threshold values judge whether generate alarm command, passed if generating alarm command Alarm is given so that alarm issues alarm signal.

Among one embodiment: the multiple mounting hole is arranged along shell axial direction uniform intervals.

Among one embodiment: the heat pipe is located at the central axes of heat exchanger.

Among one embodiment: the humidity sensor is placed in from the mounting hole of shell and is fixed on inside heat exchanger.

Among one embodiment: further including display, the host is connected with display with different in real-time display heat exchanger The humidity at position.

Among one embodiment: the spacing in the multiple mounting hole per adjacent two mounting hole is 0.5~2m.

Among one embodiment: each described humidity sensor is equipped with an above-mentioned alarm.

The present invention solve the used technical solution of its technical problem second is that:

The online leak hunting method of the online leakage detection apparatus of above-mentioned heat exchanger tube, comprising:

Step 1, the humidity sensor of multiple mounting holes is all sequentially composed of number, and humidity sensor obtains real-time humidity letter Number；

Step 2, signal amplifier connects humidity sensor to amplify real-time humidity signal；

Step 3, host obtains real-time humidity signal and generates real-time wet angle value, according to real-time wet angle value and humidity alarm valve Value judges whether generation alarm command, is transferred to alarm if generating alarm command so that alarm issues alarm signal Number.

Among one embodiment: each humidity sensor is equipped with an alarm；

The step 3 includes:

Step 31, host obtains real-time humidity signal and generates real-time wet angle value；

Step 32, judge the real-time wet of the humidity sensor of adjacent two number along the high-temperature gas flowing direction of heat exchanger Whether the difference of angle value is greater than humidity alarm threshold values, and if more than alarm command is then generated, above-mentioned adjacent two number is i and i-1, will Alarm command sends i number to or/and i-1 numbers corresponding alarm.

The technical program compared with the background art, it has the following advantages:

It is hunted leak by moisture signal, can judge in time whether heat pipe is revealed, remind maintenance personnel to take in time in leakage Corresponding measure.

Judge along heat exchanger high-temperature gas flowing direction it is adjacent two number humidity sensors real-time wet angle value it Whether difference is greater than humidity alarm threshold values, then heat pipe leakage position can be according to judging at the humidity mutation that humidity sensor is experienced Out, it can find simultaneously accurately to judge heat pipe leakage position and degree in time, maintenance personnel is reminded to take corresponding measure；Present apparatus structure Simply, at low cost, leak point can be found and be positioned at heat pipe generation leakage initial stage, both avoid electrical equipment due to heat pipe leakage It is impaired, and the remaining life of heat exchanger is taken full advantage of, save equipment cost.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and specific embodiments.

Fig. 1 is the structural schematic diagram of the online leakage detection apparatus of heat exchanger tube of specific embodiment；

Fig. 2 is the mounting structure main view of the sensor of the online leakage detection apparatus of heat exchanger tube of specific embodiment.

Fig. 3 is the mounting structure top view of the sensor of the online leakage detection apparatus of heat exchanger tube of specific embodiment.

Specific embodiment

Fig. 1 to Fig. 3, a kind of online leakage detection apparatus of heat exchanger tube, including heat exchanger 1, humidity sensor 2, signal is please referred to put Big device 3, host 4, display 5, alarm 6.

The heat exchanger 1 includes shell 1.2 and heat pipe 1.1, and the shell 1.2 is interior equipped with installation space and multiple through peace The mounting hole inside and outside space is filled, along the axial uniform intervals arrangement of shell 1.2, the spacing per adjacent two mounting hole is multiple mounting holes 0.5~2m；The heat pipe 1.1 is installed in shell 1.2 and arranges along 1 central axes of heat exchanger；Pacify on each mounting hole Equipped with humidity sensor 2, the humidity sensor 2 in the mounting hole of 1 shell of heat exchanger from being placed in and be fixed in heat exchanger 1 Portion.

The signal amplifier 3 is connect by conducting wire with humidity sensor 2, for amplifying the signal of sensor 2；The master Machine 4 is connect with signal amplifier 3 by conducting wire to obtain real-time wet angle value, and the display 5 is connect with host 4, with real-time display The humidity of different parts in heat exchanger 1, the host 4 set humidity alarm threshold values and according to real-time wet angle value and humidity alarm valve Value judges whether to generate alarm command and sends alarm command to alarm 6, wherein the host 4 such as directlys adopt counter i.e. It can determine whether, PLC control system such as can be used in the host 4.The alarm 6 is connect with host 4, when receiving alarm command Alarm signal is issued, the signal that the alarm issues is acoustical signal and optical signal, such as buzzer and light flash.

When work, the drying high-temperature gas in heat exchanger 1 flows into air inlet pipe, if heat pipe does not leak, interior water is less And can quickly volatilize, if heat pipe leaks, initial stage leakage increases dry gas humidity, it is sensed by humidity sensor 2, The electric signal of humidity sensor 2 passes to host 4 by the amplification of signal amplifier 3, and the humidity value of different humidity sensor 2 is shown Show on display 5, if flowing direction along high-temperature gas, from the subsequent humidity of the humidity ratio of some position forward greatly to more than certain A setting threshold values, then host 4 judges occur heat pipe leakage between these two positions, and generates alarm command, the alarm Device receives the report for police service instruction to sound an alarm.

The online leak hunting method of the online leakage detection apparatus of heat exchanger tube, it is characterised in that: include:

Step 1, the humidity sensor of multiple mounting holes is all sequentially composed of number 1 ... N, each humidity sensor are arranged There is an alarm, the number of the alarm identical as the corresponding number of humidity sensor is also 1 ... N, humidity sensor Obtain real-time humidity signal；

Step 2, signal amplifier connects humidity sensor to amplify real-time humidity signal；

Step 3, host obtains real-time humidity signal and generates real-time wet angle value, according to real-time wet angle value and humidity alarm valve Value judges whether generation alarm command, is transferred to alarm if generating alarm command so that alarm issues alarm signal Number, among the present embodiment: the step 3 includes:

Step 31, host obtains real-time humidity signal and generates real-time wet angle value；

Step 32, judge the real-time wet of the humidity sensor of adjacent two number along the high-temperature gas flowing direction of heat exchanger Whether the difference of angle value is greater than humidity alarm threshold values, and if more than alarm command is then generated, above-mentioned adjacent two number is i and i-1, then The region that judgement number is i between the two humidity alarm threshold values of i-1 leaks, by alarm command send to i number or/ Corresponding alarm is numbered with i-1, which issues alarm signal.

To verify the leak detection effect of present embodiment and to the influence factor of leak detection effect, following data is using control Quantity method processed judges the position of leak source by the numerical fluctuations size of 4 instruments, and default humidity variation threshold values is set as 0.5%, Leak source position is located between 3 and 4 simultaneously, and air inlet is at 4.

(1) influence of the temperature to leak detection effect, such as table one:

(2) influence of the water temperature to leak detection effect, such as table two:

(3) influence of the hydraulic pressure to leak detection effect, such as table three:

(4) influence of the humidity sensor position to leak detection effect, such as table four:

Experiment conclusion:

From table one: temperature is higher, and it is longer to reach humidity variation threshold time.

From table two: water temperature is higher, but it is shorter to reach humidity variation threshold time.Analysis is the reason for this is that water temperature is got over The speed of height, water evaporation is faster, and the speed of humidity variation is faster.

From table three: hydraulic pressure is bigger, and on initial humidity without influence, but it is shorter to reach humidity variation threshold time.Point It is that hydraulic pressure is bigger that it, which analyses reason, and leakage flow is bigger, and the variation of the humidity caused by breakage is faster.

From table four: effect is slightly good when humidity sensor position is in heat exchanger top and middle part, and is significantly better than Bottom.The reason for this is that higher in heat exchanger internal temperature, moisture largely exists in gaseous form, can rise to heat exchanger for analysis Upper middle part.

It is larger to the default undulating value time effects of instrument arrival to compare 4 tables, temperature and hydraulic pressure.Water temperature and humidity sensor It is smaller that device position reaches default undulating value time effects to instrument.

So environment smoke temperature where heat exchanger tube should be as small as possible, and heat exchanger tube hydraulic pressure should be as far as possible in controllable range Greatly, however the position of water temperature and humidity sensor can take most economical, convenient and fast mode rationally to control.This sampling instrument is detecting When can also alarm in first time, staff overhaul according to the position of alarm, loss is preferably minimized.

The above is only the preferred embodiment of the present invention, the range implemented of the present invention that therefore, it cannot be limited according to, i.e., according to Equivalent changes and modifications made by the invention patent range and description, should still be within the scope of the present invention.