CN218725036U

CN218725036U - Remove shared flue monitoring and analyzing device that leaks out

Info

Publication number: CN218725036U
Application number: CN202223215709.2U
Authority: CN
Inventors: 王承亮; 王泽�
Original assignee: Huadian International Power Co ltd Technical Service Branch
Current assignee: Huadian International Power Co ltd Technical Service Branch
Priority date: 2022-07-25
Filing date: 2022-12-02
Publication date: 2023-03-24
Anticipated expiration: 2032-12-02

Abstract

The utility model provides a remove shared flue monitoring analysis device that leaks out, including the sampling gun, a plurality of thief holes have been seted up to the surface of sampling gun, the right side of thief hole is installed in proper order and is kept warm box joint, sampling pipe joint, first isolation ball valve, heat preservation box and flue gas analyzer interface etc.. When the utility model is used for sampling gas, a plurality of sampling guns are simultaneously placed in different positions in a tested flue, and a smoke exhaust fan is connected with the utility model and is opened, so that smoke at different positions in the flue is sucked and stored in a heat preservation box; when detecting, be connected flue gas analysis appearance and flue gas analysis appearance interface, alright detect the inside gas of heat preservation box, thereby the flue gas analysis appearance can be to the oxygen content of the gas that different positions were collected carry out the analysis and whether have the flue condition of leaking out between each monitoring point. The utility model discloses can realize collecting the gas sample of different positions at same time quantum, then carry out the analysis investigation of flue hourglass, the utility model discloses can avoid undulant big because of boiler combustion, adopt different periods to detect and lead to the error big or have the influence of data misleading.

Description

Remove shared flue monitoring and analyzing device that leaks out

Technical Field

The utility model relates to a flue technique field that leaks out especially relates to a remove shared flue monitoring analysis device that leaks out.

Background

The working condition of the tail flue system of the thermal power plant directly influences the plant power consumption rate of the induced draft fan system and the operation safety of the induced draft fan, the key points include that the resistance of parts is large and the air leakage rate of the flue of the negative pressure area is large, so that the output of the induced draft fan is increased, the energy consumption of a unit is increased, the risk of air rushing and stalling of the induced draft fan is increased, the air leakage problem of the tail flue is very difficult to query, and the air leakage point is that air is sucked into the flue instead of being emitted outwards, so that the air leakage point is difficult to search. The flue system is long and works at a high place, so that the difficulty is increased, and common workers who leak air in the flue directly check the air, but the method has low efficiency and is uncontrollable; another method is to indirectly reflect the air leakage condition of the flue in the measuring section through oxygen quantity change by measuring oxygen quantities at different positions, but the measuring method has two problems: firstly, two flue gas analyzers are needed at the same time, the cost is high, and the requirement of a common unit cannot be met; secondly, the flue gas analyzer is used for separate measurement, but because the combustion fluctuation of the boiler is large, if two measuring points are separately measured and the time interval is large, the oxygen amount fluctuation of the boiler per se is large, so that the oxygen amounts measured in two time periods are used for analyzing the air leakage condition of the flue, the error is large, the possibility of misleading the analysis and investigation result exists, and the air leakage investigation work of the flue cannot normally run.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the shortcoming that exists among the prior art, reach and detect the oxygen content and analyze the flue condition of leaking out to the flue gas of different positions in the flue at same time quantum for there is not misleading possibility in little and analysis investigation result of error.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a remove shared flue monitoring analysis device that leaks out, includes the sampling rifle, a plurality of thief holes have been seted up to the surface of sampling rifle, the right side fixed mounting of thief hole has the heat preservation box to connect, the right-hand member that the heat preservation box connects is provided with demountable installation's sampling pipe joint, sampling pipe joint right-hand member is provided with first isolation ball valve, and the right-hand member of first isolation ball valve is provided with the heat preservation box, the right-hand member of heat preservation box is provided with the flue gas analyzer interface.

Preferably, a second isolation ball valve is arranged between the smoke analyzer interface and the heat preservation box, and a detachable smoke exhaust fan interface is arranged at the right end of the smoke analyzer interface.

Preferably, the number of the plurality of sampling holes is seven, the sampling holes are spaced by 0.3m, and the first and seventh sampling holes are 0.5m away from the end; the aperture sizes of the seven sampling holes are 0.5mm, 0.7mm, 1.0mm, 1.4mm, 1.9mm, 2.4mm and 3.1mm in sequence.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

because the utility model discloses set up a plurality of thief holes on the sampling gun, the sampling gun passes through the heat preservation box and connects, sampling pipe connects and keeps warm box, flue gas analyzer interface, smoking fan interface and is connected, then puts into the different positions in being surveyed the flue with a plurality of sampling guns simultaneously, is connected smoking fan and this device, opens the smoking fan and just makes the flue gas in the flue inhale and preserve in the heat preservation box, then sends into the thermostat and waits to examine. When needs examine, be connected flue gas analysis appearance and flue gas analysis appearance interface, alright detect the inside gas of heat preservation box, thereby the flue gas analysis appearance can be to the oxygen content of the gas that different positions were collected carry out the analysis and whether have the flue condition of leaking out between each monitoring point. The utility model discloses can realize collecting the gas sample of different positions at same time quantum, then only use a flue gas analyzer alright carry out the analysis investigation that the flue leaked out, the utility model discloses can avoid undulant big because of boiler combustion, adopt different periods to carry out gas collection and detect and lead to the error big or have the influence of data misleading.

Drawings

Fig. 1 is the utility model provides a remove shared flue monitoring and analysis device spatial structure sketch map that leaks out.

Illustration of the drawings:

1. a sampling gun; 2. a sampling hole; 3. a heat preservation box joint; 4. a sampling pipe joint; 5. a first isolation ball valve; 6. a heat preservation box; 7. a second isolation ball valve; 8. a flue gas analyzer interface; 9. a smoke exhaust fan interface.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the present invention is not limited to the limitations set forth in the following description of the specific embodiments.

Embodiment 1, as shown in fig. 1, the utility model provides a remove shared flue monitoring analysis device that leaks out, including sampling gun 1, a plurality of thief holes 2 have been seted up to sampling gun 1's surface, and sampling gun 1's right side fixed mounting has the heat preservation box to connect 3, and the right-hand member that the heat preservation box connects 3 is provided with demountable installation's sampling tube joint 4, sampling tube joint 4 right-hand member is provided with first isolation ball valve 5, and the right-hand member of first isolation ball valve 5 is provided with heat preservation box 6, and the right-hand member of heat preservation box 6 is provided with flue gas analyzer interface 8. A second isolation ball valve 7 is arranged between the flue gas analyzer interface 8 and the heat preservation box 6, and a detachable smoke exhaust fan interface 9 is arranged at the right end of the flue gas analyzer interface 8.

The utility model provides a sampling gun 1, heat preservation box connect 3, sampling tube joint 4, flue gas analyzer interface 8 and smoking fan interface 9 are the tubular structure, and the external diameter that the box that keeps warm connects 3 usually slightly is less than the external diameter of sampling gun 1, and this structure is convenient to process. The utility model discloses in demountable installation generally be threaded connection, also can be connected modes such as joint. The first isolation ball valve 5 and the second isolation ball valve 7 are connected with adjacent components through threads, and the two valves can be replaced by other valves with the function of isolating gas. The utility model discloses also can not use the second to keep apart ball valve 7, replace the second with stopper or block cap and keep apart ball valve 7 and plug up flue gas analyzer interface 8's outer port, also can prevent equally to store the gas sample in heat preservation box 6 and leak. If the inlet of the used smoke exhaust fan is similar to the size of the probe of the used smoke analyzer, the smoke exhaust fan interface 9 can be omitted, and the smoke exhaust fan and the smoke analyzer can share the smoke analyzer interface 8.

In this embodiment, the number of the plurality of sampling holes 2 is seven, the interval is 0.3m, and the first and seventh sampling holes 2 are 0.5m from the end, and the pore sizes of the seven sampling holes 2 are 0.5mm, 0.7mm, 1.0mm, 1.4mm, 1.9mm, 2.4mm and 3.1mm in sequence, because the diameters of the seven sampling holes 2 are reduced from left to right in sequence, the flue gas of the large-section flue is adsorbed more uniformly, the adsorption energy close to the smoking machine is stronger, and the pore size of the sampling hole 2 close to the smoking machine is smaller. The shape of heat preservation box 6 in this embodiment is oval spheroid, and when this shape was favorable to the flue gas to inhale, original gas outgoing was clean in the heat preservation box, the utility model discloses a heat preservation box also can be other shapes, like ball shape or rectangle box body etc..

The utility model discloses the device can use two simultaneously, also can use more simultaneously, this embodiment has used two, earlier respectively connect 3 and sampling tube joint 4 with the sampling gun of every device through the heat preservation box, and be connected flue gas analyzer interface 8 and smoking fan interface 9, then send into the sampling gun 1 of two devices respectively and draw gas sample by the anterior segment and the back end of survey flue, during the extraction gas sample, be connected smoking fan and smoking fan interface 9, open the switch of smoking fan, through sampling hole 2 alright absorb the flue gas respectively to the anterior segment and the back end of flue, the flue gas is inhaled in the heat preservation box 6, close first isolation ball valve 5 and second isolation ball valve 7, make the flue gas storage in heat preservation box 6, thereby obtain the different positions of flue, the gas sample of same period. And (5) sending the heat preservation box 6 into a thermostat to be detected. When needs examine, be connected flue gas analysis appearance and flue gas analysis appearance interface 8, open second isolation ball valve 7, alright detect the inside gas of heat preservation box 6, through using a flue gas analysis appearance to detect the analysis in proper order to different heat preservation boxes 6 respectively, can obtain the oxygen content of the gas sample that each monitoring point was taken in same period to the analysis investigation flue condition of leaking out. The utility model discloses a gas sample at same time quantum, collection different positions only adopts a flue gas analyzer alright carry out the analysis moreover, has saved the expense, has still avoided because of boiler combustion is undulant big, adopts different periods to collect gas and carries out the analysis and lead to the error big or have the influence of data misleading.

The flue gas analyzer in this embodiment is a high-efficiency flue gas analyzer of desto teso 320, and the device is an existing product (refer to:

https://www.testo.com/zh-CN/testo320gao-xiao-yan-qi-fen-xi-yi/p/0632-3220) to help explain the working process of the present application, the working principle of the flue gas analyzer is now briefly explained: the flue gas analyzer is internally provided with O ₂ And a CO monitoring module, wherein the smoke analyzer is provided with a suction pump, and when the measured smoke is communicated with the smoke analyzer, the smoke analyzer is started, and the suction pump of the smoke analyzer can suck the smoke into the O inside the smoke analyzer ₂ And a CO monitoring module to realize the measurement of the O of the flue gas ₂ And the CO concentration is visually displayed on a display screen, and the smoke is emptied through the measurement of a smoke analyzer. The flue gas analyzer of the utility model can also adopt other models, such as Detuo testo350, as long as it has the analysis air O ₂ And CO concentration functions.

The utility model discloses when monitoring the analysis to the gas in the heat preservation box 6, with the flue gasThe analyzer is connected with a smoke analyzer interface 8 in the device, then a second isolation ball valve 7 is opened, the smoke analyzer is started, and the smoke in the heat preservation box can be sucked by a suction pump of the smoke analyzer to enter the O inside the smoke analyzer ₂ And a CO monitoring module, thereby realizing the measurement of the smoke O in the heat preservation box ₂ And the CO concentration is visually displayed on a display screen, and the air leakage condition inside the flue can be obtained through the gas oxygen-containing data of different positions given by the flue gas analyzer. Flue air leakage rate calculation formula: flue air leakage rate (%) = ([ O) ₂ ] ₂ -[O ₂ ] ₁ )/(21-[O ₂ ] ₂ ) 90 (%). Wherein [ O ] ₂ ] ₁ Oxygen concentration at a sampling point 1 on the upstream of a flue gas flow of a tail flue of a boiler; [ O ] ₂ ] ₂ The oxygen concentration of the flue gas flow of the tail flue of the boiler relative to the downstream sampling point of the sampling point 1.

Additionally, the utility model discloses when extracting the gas sample, the adjustment door of accessible smoke ventilator entry realizes the regulation and the control to extraction flue gas volume, and the smoke ventilator of general industrial use all has this function, because the flue before boiler afterbody to the draught fan all is in the negative pressure state, and smoke ventilator is exerted oneself and is minimum negative pressure in pressing boiler afterbody flue, carries out the check and decides and leaves 30% allowance, just so can ensure that the flue gas is normally taken out. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may apply the equivalent embodiments modified or modified by the above technical contents disclosed as equivalent variations to other fields, but any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a remove shared flue monitoring analysis device that leaks out, includes sampling gun (1), its characterized in that: a plurality of thief holes (2) have been seted up to the surface of thief gun (1), have heat preservation box joint (3) at the right side fixed mounting of thief hole (2), the right-hand member that heat preservation box connects (3) is provided with demountable installation's sampling tube joint (4), sampling tube joint (4) right-hand member is provided with first isolation ball valve (5), and the right-hand member of first isolation ball valve (5) is provided with heat preservation box (6), the right-hand member of heat preservation box (6) is provided with flue gas analyzer interface (8).

2. The mobile sharing type flue air leakage monitoring and analyzing device according to claim 1, characterized in that: a second isolation ball valve (7) is arranged between the smoke analyzer interface (8) and the heat preservation box (6), and a detachable smoke exhaust fan interface (9) is arranged at the right end of the smoke analyzer interface (8).

3. The mobile sharing type flue air leakage monitoring and analyzing device according to claim 1 or 2, characterized in that: the number of the plurality of sampling holes (2) is seven, the spacing is 0.3m, and the distance between the first sampling hole (2) and the seventh sampling hole (2) and the end part is 0.5m; the pore diameters of the seven sampling holes (2) are 0.5mm, 0.7mm, 1.0mm, 1.4mm, 1.9mm, 2.4mm and 3.1mm in sequence.