CN210907242U

CN210907242U - Pressure taking purging device for measuring boiler pressure

Info

Publication number: CN210907242U
Application number: CN201921842067.4U
Authority: CN
Inventors: 王亚东; 王立波
Original assignee: Datang Binzhou Power Generation Co ltd
Current assignee: Datang Binzhou Power Generation Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-07-03
Anticipated expiration: 2029-10-28

Abstract

The utility model discloses a get pressure and sweep device for measuring boiler pressure belongs to and gets pressure technical field. The utility model discloses a get and press the purge tube, get and press purge tube one end to be used for being linked together with furnace, get and press the other end and the air supply of purge tube to be linked together, the air supply loops through deareator and flow controller and sweeps gas to getting to press the intraductal supply of purge, wherein gets to press the purge tube to keep away from furnace and serve and be provided with and get the pressure tube that is linked together of pressing the purge tube, and the bottom of pressing the purge tube still is provided with the deashing pipe, is equipped with the deashing valve on the deashing pipe. The utility model aims to overcome the not enough of the easy jam of current boiler pressure taking device, provide a pressure taking sweeps device for measuring boiler pressure, can solve the boiler and get the problem that pressure taking device blockked up and measure inaccurately, and need not carry out the manual work and sweep, alleviateed workman's intensity of labour greatly, provide effectual data assurance for the safe operation of boiler.

Description

Pressure taking purging device for measuring boiler pressure

Technical Field

The utility model relates to a get and press technical field, more specifically say, relate to a get and press device that sweeps for measuring boiler pressure.

Background

At present, the pressure measurement of pressure measurement areas such as primary air pressure, secondary air pressure, tertiary air pressure, hearth pressure, smoke pressure and the like of a boiler in a power plant generally adopts a conventional pressure measurement mode, namely, a common anti-blocking pressure measurement device is additionally arranged for measurement. When the boiler is in positive pressure combustion, impurities such as dust in the boiler can enter the pressure tapping pipe under the action of the pressure of the hearth, and the dust is slowly accumulated in the pressure tapping pipe for a long time to cause serious blockage of the pressure tapping pipe, so that continuous measurement of the pressure is influenced, serious hidden dangers are brought to normal combustion and safe operation of the boiler, and the blockage situation is more prominent particularly for a circulating fluidized bed boiler.

Through retrieval, a large number of patents have been disclosed about anti-blocking pressure tapping devices, such as chinese patent application No.: 2013201638400, the name of invention creation is: the utility model provides a pressure pipe anti-blocking device is pressed to the pressure pipe, this application discloses a pressure pipe anti-blocking device is pressed to the pressure pipe, is equipped with first cut-off valve once between pressure valve and the pressure valve, adds the blowback between pressure valve and the first cut-off valve and sweeps the pipeline, and the blowback is swept and is equipped with second trip valve, manometer and blowback air supply pressure valve on the pipeline, and the blowback is swept the pipeline and is communicated with each other with high-pressure nitrogen gas pipeline. According to the scheme, the online back flushing of the pressure tapping pipeline is realized in a full-automatic timing or manual mode through the high-pressure nitrogen of the circulating air supplementing system and the cut-off valve bank, so that the problems of blockage of the pressure tapping pipe due to positive pressure and solid dust, frequent dredging of operators and equipment shutdown caused by the blockage of the pressure tapping pipe are solved.

Also as in chinese patent application No.: 2017219078401, the name of invention creation is: the application discloses a purging device for a negative pressure sampling tube of a boiler hearth, which comprises a sampling purging tube, a sampling device, a flow controller and an air pressure adjusting device, wherein the sampling purging tube is connected with the sampling device; the sampling device is communicated with the sampling purging pipe; one end of the sampling purging pipe is communicated with a boiler hearth, and the other end of the sampling purging pipe is communicated with the flow controller and the air pressure adjusting device in sequence through a pipeline; the sampling device is used for connecting the pressure measurement display instrument, and the air pressure adjusting device is used for adjusting the air pressure and flowing the air with changed pressure into the sampling purging pipe through the flow controller. Both the two schemes are good exploration of the anti-blocking pressure tapping device, but the research on the anti-blocking pressure tapping device in the industry is never stopped.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the not enough of the easy jam of current boiler pressure taking device, provide a pressure taking sweeps device for measuring boiler pressure, can solve the boiler and get the problem that pressure taking device blockked up and measure inaccurately, and need not carry out the manual work and sweep, alleviateed workman's intensity of labour greatly, provide effectual data assurance for the safe operation of boiler.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a get pressure and sweep device for measuring boiler pressure, including getting pressure and sweep the pipe, get pressure and sweep pipe one end and be used for being linked together with furnace, get the other end that presses the pipe and sweep the pipe and be linked together with the air supply, the air supply loops through deareator and flow controller and sweeps gas to getting the intraductal supply of pressure and sweep, wherein gets to press and sweep the pipe and keep away from furnace one to serve and be provided with and get the pressure pipe that presses the pipe to be linked together, and the bottom of pressing the pipe of sweeping still is provided with the deashing pipe, is equipped with the deashing valve on the deashing.

As a further improvement, the bottom of the ash removal pipe is provided with an impurity collector, and the bottom of the impurity collector is provided with a blowoff valve.

As the utility model discloses further improvement gets and presses the ascending section that sweeps the pipe and include the descending branch that is linked together with furnace and is linked together with flow controller, descending branch and ascending section are V style of calligraphy structure, and wherein the junction of descending branch and ascending section is provided with the deashing pipe downwards, is provided with on the ascending section and gets and press the pipe.

As a further improvement, the impurity collector is provided with an air dryer.

As a further improvement, the pressure-taking purging pipe is connected with the flow controller through a metal hose.

As a further improvement, the flow controller is provided with a pressure display instrument.

As a further improvement, the pressure tapping pipe is kept away from the one end of the pressure tapping purging pipe and is connected with the transmitter.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the utility model discloses a pressure taking sweeps device for measuring boiler pressure, after the air supply passed through gas-water separator and flow controller, its quality and pressure flow all reached the requirement of sweeping, and then the admission sweep pipe gets into the pressure taking sweep pipe and sweeps, adopts the automatic mode of sweeping, need not carry out artifical sweeping, has alleviateed workman's intensity of labour greatly, has improved the productivity effect; and the pressure of the purging gas is greater than that of the measuring point, so that the problems that the pressure-taking purging pipe is easily blocked by dust and is easily burnt in a high-temperature state are solved.

(2) The utility model discloses a get pressure and sweep device for measuring boiler pressure gets pressure and sweeps the pipe and include the descending branch that is linked together with furnace and the ascending branch that is linked together with flow controller, and descending branch and ascending branch are V style of calligraphy structure, get the V style of calligraphy structural design that presses and sweep the pipe, can guarantee that the dust in the descending branch of V-arrangement both sides and the ascending branch can all concentrate on the lower by the dead weight, realized that the dust falls from concentrating, can not influence the accuracy of getting pressure yet.

(3) The utility model discloses a get pressure and sweep device for measuring boiler pressure, the junction of descending branch and ascending branch is provided with the deashing pipe downwards for to getting pressure to sweep the intraductal accumulation of dust clearance discharge, and the deashing is managed and is equipped with the deashing valve, simultaneously, gets to be provided with on the pipe and gets and press the valve. When the ash is required to be removed, the pressure removal valve is only required to be closed, and the ash removal valve is opened to complete the cleaning of the dust in the pressure removal blowing pipe.

(4) The utility model discloses a get pressure and sweep device for measuring boiler pressure, deashing socle portion is provided with impurity collector for collect the processing to the intraductal impurity of deashing, impurity collector bottom is provided with the blowoff valve. Wherein, an air dryer is arranged in the impurity collector and is used for absorbing the condensed water coming out of the hearth.

(5) The utility model discloses a get pressure and sweep device for measuring boiler pressure, gas-water separator can carry out gas, water autosegregation to the sweep gas that the air supply provided, gets rid of the impurity in the sweep gas, ensures that flow controller does not receive the pollution of water, has improved flow controller's life, makes it to guarantee long-time reliable operation.

Drawings

Fig. 1 is a schematic structural diagram of a pressure-taking purging device for measuring boiler pressure according to the present invention.

The reference numerals in the schematic drawings illustrate:

100. a hearth; 210. a pressure-taking purging pipe; 211. a descending section; 212. a rising section; 213. a dust removal pipe; 214. an ash removal valve; 220. a pressure sampling pipe; 230. a transmitter; 240. a metal hose; 250. a flow controller; 260. a gas-water separator; 270. a gas source; 280. an impurity collector; 281. a blowoff valve.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be further described with reference to the following examples.

Example 1

As shown in fig. 1, the pressure-taking purging device for measuring the boiler pressure according to the embodiment includes a pressure-taking purging pipe 210, one end of the pressure-taking purging pipe 210 is used for being communicated with a furnace 100, the other end of the pressure-taking purging pipe 210 is communicated with a gas source 270, the gas source 270 supplies a purging gas into the pressure-taking purging pipe 210 sequentially through a gas-water separator 260 and a flow controller 250, that is, the purging gas provided by the gas source 270 sequentially passes through the gas-water separator 260 and the flow controller 250, and then is introduced into the pressure-taking purging pipe 210 to purge dust in the pressure-taking purging pipe 210. Specifically, in the present embodiment, the pressure-taking purge pipe 210 is connected to the flow controller 250 through a metal hose 240. The gas-water separator 260 can automatically separate gas and water from the purge gas provided by the gas source 270, remove impurities in the purge gas, ensure that the flow controller 250 is not polluted, prolong the service life of the flow controller 250, and ensure long-term reliable operation. After the purge gas passes through the gas-water separator 260 and the flow controller 250, the mass and the pressure flow of the purge gas reach the purge requirement, and then the purge gas is introduced into the pressure-taking purge pipe 210 to purge dust accumulated in the pressure-taking purge pipe 210, the whole process adopts an automatic purge mode, manual purge is not needed, the labor intensity of workers is greatly reduced, and the production benefit is improved; and the pressure of the purging gas is greater than the pressure of the measuring point, so that the problems that the pressure-taking purging pipe 210 is easily blocked by dust and is easily burnt in a high-temperature state are solved.

In this embodiment, a pressure tapping pipe 220 communicated with the pressure tapping purging pipe 210 is arranged at one end of the pressure tapping purging pipe 210, which is far away from the furnace 100, and a pressure compensation unit is arranged inside the pressure tapping purging pipe 210, so that the pressure of a measuring point on the furnace 100 on the pressure tapping purging pipe 210 is the same as the pressure of a measuring point on the pressure tapping pipe 220 under the compensation action of the pressure compensation unit by the wind pressure measured in the furnace 100, thereby ensuring the accuracy of pressure tapping of the pressure tapping pipe 220. One end of the pressure sampling pipe 220, which is far away from the pressure sampling purging pipe 210, is connected to the transmitter 230, and the transmitter 230 is used for measuring the wind pressure sampled by the pressure sampling pipe 220 and transmitting the wind pressure to an operation display screen of a worker, so as to conveniently monitor the change condition of the pressure in the furnace 100 at any time.

The bottom of this embodiment middling pressure purge pipe 210 still is provided with deashing pipe 213 for the dust that accumulates in pressure taking purge pipe 210 is cleared up and is discharged, and is equipped with deashing valve 214 on the deashing pipe 213, and simultaneously, is provided with pressure taking valve on the pressure taking pipe 220. When the ash needs to be removed, the ash removal valve 214 is opened by closing the pressure removal valve, so that the dust in the pressure removal purging pipe 210 can be removed. The bottom of the ash removing pipe 213 is provided with a foreign matter collector 280, and the bottom of the foreign matter collector 280 is provided with a blow-down valve 281. Wherein, an air dryer is arranged in the impurity collector 280 for absorbing the condensed water from the hearth 100.

The pressure sampling purging pipe 210 in this embodiment includes a descending section 211 communicated with the furnace 100 and an ascending section 212 communicated with the flow controller 250, the descending section 211 and the ascending section 212 are in a V-shaped structure, the connection part of the descending section 211 and the ascending section 212 is provided with an ash removing pipe 213 downwards, and the ascending section 212 is provided with a pressure sampling pipe 220. The V-shaped structural design of the pressure-taking purging pipe 210 can ensure that dust in the descending section 211 and the ascending section 212 on two sides of the V shape can be concentrated at the lowest position by self weight, so that the self-descending concentration of the dust is realized, and the pressure-taking accuracy cannot be influenced.

In this embodiment, the flow controller 250 is provided with a pressure display instrument for detecting the pressure of the purge gas introduced into the pressure measurement purge pipe 210, so as to facilitate observation and adjust the purge pressure at any time. The measurement principle of the pressure measuring device in the embodiment is that a method of continuously blowing the blowing gas with constant external air pressure in the measuring point is utilized, the measuring point can be prevented from being blocked, meanwhile, after compensation of the compensation unit, differential pressure generated by the pressure of the back blowing gas is eliminated, and the accuracy of the measured value is ensured.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A pressure taking purging device for measuring boiler pressure is characterized in that: including getting pressure purge tube (210), it is used for being linked together with furnace (100) to get pressure purge tube (210) one end, it is linked together with air supply (270) to get the other end of pressure purge tube (210), air supply (270) loop through deareator (260) and flow controller (250) and sweep gas to getting pressure purge tube (210) interior supply, wherein get pressure purge tube (210) keep away from furnace (100) serve be provided with get pressure tube (220) that are linked together with getting pressure purge tube (210), and the bottom of pressing purge tube (210) still is provided with deashing pipe (213), be equipped with deashing valve (214) on deashing pipe (213).

2. A pressure taking purge apparatus for measuring boiler pressure according to claim 1, wherein: the bottom of the ash removing pipe (213) is provided with an impurity collector (280), and the bottom of the impurity collector (280) is provided with a blow-down valve (281).

3. A pressure taking purge apparatus for measuring boiler pressure according to claim 1 or 2, characterized in that: the pressure-taking purging pipe (210) comprises a descending section (211) communicated with the hearth (100) and an ascending section (212) communicated with the flow controller (250), the descending section (211) and the ascending section (212) are of V-shaped structures, an ash-removing pipe (213) is arranged at the joint of the descending section (211) and the ascending section (212) downwards, and a pressure-taking pipe (220) is arranged on the ascending section (212).

4. A pressure taking purge apparatus for measuring boiler pressure according to claim 3, wherein: an air dryer is disposed within the impurity collector (280).

5. A pressure taking purge apparatus for measuring boiler pressure according to claim 1, wherein: the pressure-taking purging pipe (210) is connected with the flow controller (250) through a metal hose (240).

6. A pressure taking purge apparatus for measuring boiler pressure according to claim 1, wherein: the flow controller (250) is provided with a pressure display instrument.

7. A pressure taking purge apparatus for measuring boiler pressure according to any of claims 1-2 or 4 or 5 or 6, characterized in that: one end of the pressure sampling pipe (220) far away from the pressure sampling purging pipe (210) is connected with the transmitter (230).