CN204490020U - Ash-transmission system blocks up grey checkout facility - Google Patents
Ash-transmission system blocks up grey checkout facility Download PDFInfo
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- CN204490020U CN204490020U CN201420860476.8U CN201420860476U CN204490020U CN 204490020 U CN204490020 U CN 204490020U CN 201420860476 U CN201420860476 U CN 201420860476U CN 204490020 U CN204490020 U CN 204490020U
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Abstract
Propose a kind of ash-transmission system and block up grey checkout facility, belong to flying ash in electric power plant transportation art.This equipment comprises multiple pneumatic test set, described multiple pneumatic test set is arranged on the gas transmission line of ash-transmission system with preset pitch, each in described multiple pneumatic test set comprises air valve and air pressure difference sensor, one end of described air valve is communicated with described gas transmission line, the other end is communicated with the first tracheae of the first pressure interface being connected to described air pressure difference sensor, to make when described air valve is opened, the pressure that the air-flow in described gas transmission line produces is passed into by described first tracheae in the first pressure chamber of described air pressure difference sensor; Second pressure interface of described air pressure difference sensor is communicated with air by the second tracheae, to make to pass into barometric pressure in the second pressure chamber of described air pressure difference sensor.This programme solves the problem cannot finding out rapidly inner pipeline plug ash point, has accurately the plurality of advantages such as time saving and energy saving fast.
Description
Technical field
The utility model belongs to flying ash in electric power plant conveying technology field, particularly relates to a kind of ash-transmission system and blocks up grey checkout facility.
Background technology
In prior art, flying ash in electric power plant delivery system adopts malleation thick and thin phase burner mode, and after putting into operation, ash conveying pipe latch up phenomenon is one of fault of more difficult eliminating.Ash-transmission system blocks up ash can cause ash bucket dust stratification, and dust collection efficiency is reduced, and is unfavorable for the protection of power station environment.Existing ash-transmission system unimpeded mode is pipeline place after outlet storehouse pump and installs a unimpeded pipe and manual unimpeded valve (as shown in Figure 1) between ash bucket, the pressure in pipeline and ash bucket negative pressure is utilized to be discharged in ash bucket by the ash in pipeline, until the defeated grey pressure of ash-transmission system pressure transformer display drops to 0bar, then restart ash-transmission system to run, if also have stifled ash to occur, continue to repeat above-mentioned unimpeded process.But, if the stifled ash of pipeline is away from unimpeded valve position, so unimpeded process repeatedly will could drain into the ash in pipeline in ash bucket completely, time serious, unimpeded valve does not have the effect of ash discharge, this needs to tear pipe inspection open, extend the idle time of ash-transmission system, too increase the work capacity of operation and service personnel.
Utility model content
In order to overcome the above-mentioned problem existed in prior art, the utility model proposes the checkout facility that a kind of pipeline blocks up ash, can investigate pipeline quickly and accurately and block up grey part, use manpower and material resources sparingly cost.
For realizing above object, the utility model proposes a kind of ash-transmission system and block up grey checkout facility, described ash-transmission system blocks up grey checkout facility and comprises multiple pneumatic test set, described multiple pneumatic test set is arranged on the gas transmission line of ash-transmission system with preset pitch, each in wherein said multiple pneumatic test set comprises air valve and air pressure difference sensor, one end of described air valve is communicated with described gas transmission line, the other end is communicated with the first tracheae of the first pressure interface being connected to described air pressure difference sensor, to make when described air valve is opened, the pressure that air-flow in described gas transmission line produces is passed into by described first tracheae in the first pressure chamber of described air pressure difference sensor, second pressure interface of described air pressure difference sensor is communicated with air by the second tracheae, to make to pass into barometric pressure in the second pressure chamber of described air pressure difference sensor.
According to an aspect of the present utility model, described air pressure difference sensor has the telltale 103 of display force value.
According to an aspect of the present utility model, described ash-transmission system blocks up grey checkout facility and also comprises the alert device be connected with described multiple pneumatic test set.
According to an aspect of the present utility model, described alert device comprises multiple interface circuit, multiple subtraction circuit, multiple comparator circuit and combined aural and visual alarm, wherein: each of described multiple interface circuit is connected with an air pressure difference sensor; Two input ends of each subtraction circuit of described multiple subtraction circuit are connected with the mouth of adjacent two interface circuits respectively, and described two adjacent interface circuits are connected to two air pressure difference sensors adjacent on position respectively; An input end of each comparator circuit of described multiple comparator circuit is connected with the mouth of described subtraction circuit, and another input end receives predetermined threshold value; The mouth of described multiple comparator circuit is connected with combined aural and visual alarm.
According to an aspect of the present utility model, described air valve is manual ball valve.
As can be seen here, according to this programme, gas transmission line is divided into the multistage being connected to multiple pneumatic test set, like this, just can judges that stifled ash has appearred in which segmentation of gas transmission line easily by the draught head obtained between adjacent pneumatic test set; In addition, additionally provide a kind of alarm circuit of the signal that gives the alarm more easily, occurred stifled ash with which segmentation of automatic-prompting testing staff, decreased the work capacity of testing staff, improve detection efficiency, decrease standing time.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing ash-transmission system unimpeded mode;
Fig. 2 is the overall installation site plan blocking up grey checkout facility according to the ash-transmission system of the utility model embodiment;
Fig. 3 is the detailed schematic of the stifled grey checkout facility according to the utility model embodiment;
Fig. 4 is the detailed schematic of the alert device of stifled grey checkout facility according to another embodiment of the utility model.
Detailed description of the invention
The following stated is better embodiment of the present utility model, does not therefore limit protection domain of the present utility model.
When boiler normally runs, flying dust is accumulated in electric duster ash bucket exit.Then entering the concentrated phase MD pump that each outlet below is installed, take pressurized air as power, through Geldart-D particle to terminal ash storehouse.MD pumping system is according to the defeated ash of frequency interval of setting, and such as eight pumps share a transfer line, deliver to cinder storehouse.Defeated grey process is that the storehouse pump inlet dome valve on a pipeline is opened, and ash falls under gravity in pump.During filler, blow off valve opens the air discharge making to replace.Each MD pump is equipped with level-sensing device, indicates whether fill material.When level-sensing device is capped, through a short delay, pump is completely filled, import dome valve and exhaust valve closure.This can continue repetition until 2 MD pumps are filled, remaining admission valve and exhaust valve closure.When all admission valves and exhaust valve closure and after sealing, outlet pump fluidization air valve and Gas mixing valve are opened.Fluidization air valve order on MD pump is opened, and there is short time gap centre, and last main pump fluidization air valve is opened.Ash is entered transfer line by the conveying air entering MD pumping system from pump, finally sends into grey storehouse.When material is discharged into terminal ash storehouse, delivery pressure reduces, and be positioned at the pressure transformer display <0.3Barg on main pump pipeline, conveying choker relief valve is closed, and circulation terminates.And when defeated grey pressure increase in defeated grey process to 4Barg maintenance is not fallen, can think that stifled ash appears in ash-transmission system, but as shown in Figure 1, because ash pipeline line is very long, accurately cannot judge stifled grey particular location.
In order to overcome this problem, as shown in Figure 2, described ash pipeline line 100 installs multiple pneumatic test set with preset space length.In one embodiment, described preset space length is 10 to 20 meters.
The structure of each pneumatic test set is described below with reference to Fig. 3.
As shown in Figure 3, described pneumatic test set comprises air valve 101 and air pressure difference sensor 102, one end of described air valve 101 is communicated with described gas transmission line 100, the other end is communicated with the tracheae 104 of one of them pressure interface being connected to described air pressure difference sensor 102, as can be seen here, when air valve 101 is opened, the pressure that air-flow in described gas transmission line 100 produces passes in a pressure chamber of described air pressure difference sensor 102 by tracheae 104, another pressure interface of described air pressure difference sensor 102 is communicated with air by tracheae 105, what pass in another pressure chamber of that is air pressure difference sensor is barometric pressure, like this, when air valve 101 is opened, described air pressure difference sensor 102 can detect the difference of pressure of gas transmission line between the air pressure and barometric pressure at this air valve 101 place.
See Fig. 2 and Fig. 3, each pneumatic test set in multiple pneumatic test set comprises structure mentioned above, like this, when occurring stifled grey 106 in the gas transmission line between two adjacent pneumatic test set, see the compressed-air actuated air flow line in Fig. 2 and Fig. 3 shown in arrow, in pneumatic test set before stifled ash 106, the force value of air pressure difference sensor is more much bigger than the force value of air pressure difference sensor in the pneumatic test set after stifled ash 106, this is because the impact that pressurized air is subject to stifled ash causes the gas transmission line increased pressure before stifled ash, and the gas transmission line after stifled ash is unobstructed.
Therefore, in one embodiment, described air pressure difference sensor has the telltale of display force value.In this case, as described above, when grey pressure increase defeated in defeated grey process is not fallen to 4Barg maintenance, all air valves in described multiple pneumatic test set can be opened the line pressure making described air pressure difference sensor measurement each air valve place place by testing staff, when the difference of pressure of adjacent two air pressure difference sensor displays is higher than predetermined value, can think that the gas transmission line between these two air pressure difference sensors exists stifled ash.
In addition, because the length of gas transmission line 101 is longer, testing staff goes to scene to check that the force value of air pressure difference sensor can waste many time one by one, therefore, as shown in Figure 4, in another embodiment, described stifled grey checkout facility also has the alert device 200 be connected with all air pressure difference sensors.Below, the particular hardware structure of described alert device 200 is described with reference to Figure 4.
Described alert device 200 has multiple interface circuit 201, each of described multiple interface circuit 201 is connected with each in multiple air pressure difference sensor, that is, interface circuit is identical with the quantity of air pressure difference sensor and carried out connecting one to one.Like this, described interface circuit can accept the signal (such as voltage) from the output of air pressure difference sensor.Described alert device 200 also has multiple subtraction circuit 202, each two input ends of described multiple subtraction circuit are connected with the mouth of adjacent two interface circuits respectively, described two adjacent interface circuits correspond respectively to two air pressure difference sensors adjacent on position, like this, the output of subtraction circuit is the difference of the output signal of adjacent two air pressure difference sensors; Described alert device 200 also has multiple comparator circuit 203, an input end of each comparator circuit is connected with the mouth of described subtraction circuit, another input end receives predetermined threshold value, that is, comparator circuit is for judging that whether the difference of pressure of adjacent vacant draught head sensor is higher than predetermined threshold value; The mouth of described multiple comparator circuit is connected with combined aural and visual alarm 204.When described comparator circuit exports the high level signal higher than predetermined threshold value, described combined aural and visual alarm (being such as multiple flash light) can send corresponding sound and light signal.Such as, when the comparator circuit be connected with the first and second adjacent air pressure difference sensors judges force value higher than predetermined threshold value, export high level signal to the flash light that is connected with this comparator circuit thus the signal that flashes, like this, testing staff just can judge that the gas transmission line between the first and second air pressure difference sensors there occurs stifled ash.Certainly, described combined aural and visual alarm can be other forms, such as buzzer phone, loudspeaker, telltale etc.
In one embodiment of the invention, described air valve is manual ball valve.
Should note; the detailed description of the invention that the utility model proposes and application are only the object of explanation; not as the restriction to the utility model protection domain, those skilled in the art can modify to meet actual needs to detailed description of the invention of the present utility model.
Claims (5)
1. ash-transmission system blocks up a grey checkout facility, it is characterized in that:
Described ash-transmission system blocks up grey checkout facility and comprises multiple pneumatic test set, and described multiple pneumatic test set is arranged on the gas transmission line of ash-transmission system with preset pitch, wherein
Each in described multiple pneumatic test set comprises air valve and air pressure difference sensor, one end of described air valve is communicated with described gas transmission line, the other end is communicated with the first tracheae of the first pressure interface being connected to described air pressure difference sensor, to make when described air valve is opened, the pressure that the air-flow in described gas transmission line produces is passed into by described first tracheae in the first pressure chamber of described air pressure difference sensor; Second pressure interface of described air pressure difference sensor is communicated with air by the second tracheae, to make to pass into barometric pressure in the second pressure chamber of described air pressure difference sensor.
2. ash-transmission system according to claim 1 blocks up grey checkout facility, it is characterized in that:
Described air pressure difference sensor has the telltale of display force value.
3. ash-transmission system according to claim 1 and 2 blocks up grey checkout facility, it is characterized in that:
Described ash-transmission system blocks up grey checkout facility and also comprises the alert device be connected with described multiple pneumatic test set.
4. ash-transmission system according to claim 3 blocks up grey checkout facility, it is characterized in that:
Described alert device comprises multiple interface circuit, multiple subtraction circuit, multiple comparator circuit and combined aural and visual alarm, wherein:
Each of described multiple interface circuit is connected with an air pressure difference sensor;
Two input ends of each subtraction circuit of described multiple subtraction circuit are connected with the mouth of adjacent two interface circuits respectively, and described two adjacent interface circuits are connected to two air pressure difference sensors adjacent on position respectively;
An input end of each comparator circuit of described multiple comparator circuit is connected with the mouth of each subtraction circuit of described multiple subtraction circuit, and another input end of each comparator circuit of described multiple comparator circuit receives predetermined threshold value;
The mouth of each comparator circuit of described multiple comparator circuit is connected with combined aural and visual alarm.
5. ash-transmission system according to claim 1 blocks up grey checkout facility, it is characterized in that:
Described air valve is manual ball valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860476.8U CN204490020U (en) | 2014-12-30 | 2014-12-30 | Ash-transmission system blocks up grey checkout facility |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420860476.8U CN204490020U (en) | 2014-12-30 | 2014-12-30 | Ash-transmission system blocks up grey checkout facility |
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| CN204490020U true CN204490020U (en) | 2015-07-22 |
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| CN201420860476.8U Active CN204490020U (en) | 2014-12-30 | 2014-12-30 | Ash-transmission system blocks up grey checkout facility |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114476690A (en) * | 2021-12-09 | 2022-05-13 | 大连海大自动化控制工程有限公司 | Automatic clear stifled device of defeated grey system of thermal power plant |
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2014
- 2014-12-30 CN CN201420860476.8U patent/CN204490020U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114476690A (en) * | 2021-12-09 | 2022-05-13 | 大连海大自动化控制工程有限公司 | Automatic clear stifled device of defeated grey system of thermal power plant |
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