CN220532492U - Compensation type hearth pressure sampling and blowing device - Google Patents
Compensation type hearth pressure sampling and blowing device Download PDFInfo
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- CN220532492U CN220532492U CN202322148189.6U CN202322148189U CN220532492U CN 220532492 U CN220532492 U CN 220532492U CN 202322148189 U CN202322148189 U CN 202322148189U CN 220532492 U CN220532492 U CN 220532492U
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- 238000005070 sampling Methods 0.000 title claims abstract description 58
- 238000007664 blowing Methods 0.000 title abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000010926 purge Methods 0.000 claims description 28
- 238000009530 blood pressure measurement Methods 0.000 claims description 11
- 238000010408 sweeping Methods 0.000 claims description 11
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a compensation type hearth pressure sampling and blowing device which comprises an oil-water separator, a compressed air pressure gauge, a compressed air pressure regulating valve, a compressed air pipeline, a rotameter, a blowing pipeline, a blowing regulating valve, a hearth pressure sampling tube, a blowing pipe, a hearth pressure guiding and measuring pipeline and a pressure transmitter. The utility model can effectively avoid the phenomenon of ash accumulation and blockage of the hearth pressure sampling pipeline in the sampling process, simultaneously reduces the maintenance amount of overhaulers and improves the working efficiency of the production field.
Description
Technical Field
The utility model relates to the field of purging of hearth pressure sampling pipelines, in particular to a design of a compensating hearth pressure sampling pipeline purging device.
Background
The furnace pressure of the boiler directly represents whether the combustion working condition of the boiler is stable or not, and is an important parameter for control and monitoring of operators, and the measured value of the furnace pressure directly relates to a boiler protection system, so that the measurement of a furnace pressure signal is inaccurate, and the safety of the whole unit is directly affected. Therefore, accurate measurement of boiler furnace pressure has important roles in maintaining the combustion temperature in the boiler furnace, analyzing the characteristics of combustion conditions in the furnace, flue operation conditions and the like. Because the hearth pressure measurement sampling device of the existing design is in the micro-positive pressure working condition of the boiler, dust impurities in the boiler can enter the sampling pipeline along with the hearth pressure, dust is slowly accumulated in the sampling pipeline, the sampling pipeline is blocked, the hearth pressure measurement is invalid, and the hearth pressure protection action and the machine unit stop can be caused when the hearth pressure measurement is serious. The existing maintenance means are to arrange personnel to manually clean at regular intervals, so that the workload of thermal personnel is increased. In addition, when the hearth pressure sampling pipeline is manually cleaned, the boiler hearth pressure protection function is required to be withdrawn, and a great potential safety hazard is brought to the operation of the boiler. According to the current state of boiler operation, to guarantee the accuracy of furnace pressure measurement, first, the smoothness of the sampling pipeline needs to be guaranteed, so how to keep the smoothness of the sampling pipeline is a problem which is worth focusing on the current site.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a compensating type hearth pressure sampling and blowing device with reasonable structural design, which solves the problem that a hearth pressure sampling pipe on a production site is easy to accumulate ash.
The utility model solves the problems by adopting the following technical scheme: the utility model provides a compensation formula furnace pressure sampling sweeps device, characterized by includes oil water separator, compressed air pressure gauge, compressed air pressure regulating valve, compressed air pipeline, rotameter, sweeps the pipeline, sweeps governing valve, furnace pressure sampling tube, sweeps pipe, furnace pressure and draws pressure measurement pipeline and pressure transmitter, oil water separator, compressed air pressure gauge, compressed air pressure regulating valve and rotameter install on compressed air pipeline in proper order, compressed air pipeline and sweeping the pipeline connection, the sweeping pipeline is through sweeping governing valve and sweeping the pipe intercommunication, the sweeping pipe stretches into the inside of furnace pressure sampling tube, furnace pressure sampling tube installs on the stove wall, furnace pressure draws pressure measurement pipeline and furnace pressure sampling tube's inside intercommunication, pressure transmitter installs on furnace pressure draws pressure measurement tube way.
Furthermore, a sampling pipeline connector is further connected to the hearth pressure guiding and measuring pipeline.
Furthermore, the hearth pressure sampling cylinder is obliquely arranged on the furnace wall.
Compared with the prior art, the utility model has the following advantages and effects: the phenomenon that the hearth pressure sampling pipeline is blocked by accumulated ash in the sampling process can be effectively avoided, meanwhile, the maintenance amount of overhaulers is reduced, and the working efficiency of a production field is improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present utility model.
In the figure: the device comprises an oil-water separator 1, a compressed air pressure gauge 2, a compressed air pressure regulating valve 3, a compressed air pipeline 4, a rotameter 5, a purging pipeline 6, a purging regulating valve 7, a hearth pressure sampling tube 8, a purging pipe 9, a furnace wall 10, a sampling pipeline joint 11, a hearth pressure leading pressure measuring pipeline 12 and a pressure transmitter 13.
Detailed Description
The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.
Examples.
Referring to fig. 1, in this embodiment, a compensated furnace pressure sampling and purging device includes an oil-water separator 1, a compressed air pressure gauge 2, a compressed air pressure regulating valve 3, a compressed air pipeline 4, a rotameter 5, a purging pipeline 6, a purging regulating valve 7, a furnace pressure sampling tube 8, a purging pipe 9, a furnace pressure leading pressure measuring pipeline 12 and a pressure transmitter 13, wherein the oil-water separator 1, the compressed air pressure gauge 2, the compressed air pressure regulating valve 3 and the rotameter 5 are sequentially installed on the compressed air pipeline 4, the compressed air pipeline 4 is connected with the purging pipeline 6, the purging pipeline 6 is communicated with the purging pipe 9 through the purging regulating valve 7, the purging pipe 9 extends into the furnace pressure sampling tube 8, the furnace pressure sampling tube 8 is obliquely installed on a furnace wall 10, the furnace pressure leading pressure measuring pipeline 12 is communicated with the interior of the furnace pressure sampling tube 8, the pressure transmitter 13 is installed on the furnace pressure leading pressure measuring pipeline 12, and a sampling pipeline joint 11 is further connected on the furnace pressure leading pressure measuring pipeline 12.
In this embodiment, in order to solve the problem of dust blockage in the furnace pressure sampling tube 8, the furnace pressure sampling tube 8 is continuously purged by adopting compressed air with adjustable pressure, so that dust in the furnace pressure sampling tube 8 is removed in real time, and an ideal anti-blockage effect is achieved.
In this embodiment, compressed air meeting the purging standard is purged to the furnace pressure sampling tube 8 through the purging tube 9 via the purging tube 6, so as to purge the furnace pressure sampling tube 8 in real time, the furnace pressure guiding and measuring tube 12 samples the furnace pressure, the connection point of the compressed air and the furnace pressure sampling tube 8 is located at the tube wall of the purging tube 9, the outlet of the purging tube 9 is located below the connection point, and the measured furnace pressure parameter is transmitted to the control system through the pressure transmitter 13, so as to realize real-time monitoring of the furnace pressure parameter.
When the hearth pressure sampling device works, the measurement accuracy of hearth pressure is directly affected by ash accumulation and blockage of a sampling device pipeline, and the pressure transmitter 13 is affected by the measurement accuracy, so that zero drift of the pressure transmitter 13 is easily caused, and certain pressure is brought to hearth pressure protection and automatic regulation. The utility model adopts the aerodynamic principle, and can ensure that the sampling of the hearth pressure is not influenced while the purging is anti-blocking.
As shown in FIG. 1, the hearth pressure sampling measurement position is shown at A in the figure, the sampling position is shown at L in the figure, and the pressure at L of A is equalized by using a hydrodynamic pressure compensation method.
From the Bernoulli equation:
Δp in formula (1) x Resistance loss between A and L;
since the flow potential difference and the density difference of the gas with the two sections of A, L are negligible, the method is characterized in that:
ρ A gH A ＝ρ L gH L (2)
therefore, the formula (1) can be simplified as:
as can be seen from the formula (3), the following is true
It can be achieved that the pressure measurement at a is equivalent to the pressure value in the furnace at L, i.e.:
P A ＝P L (5)
since the purge gas densities at a and L are substantially the same, namely:
ρ A ＝ρ L (6)
it can be deduced from the flow continuity equation:
from the fluid mechanical resistance calculation methodThe drag loss between points a and L is related to the on-way drag coefficient, local drag coefficient, fluid density, kinetic energy. Z is the equivalent resistance coefficient between A and L, the resistance loss deltap x The expression can be as follows:
substituting the formulas (6) to (8) into the formula (4), and obtaining the finished product:
further simplifying the above formula (9) to obtain effective compensation conditions:
p in the above A 、P L Pressure at A, L, respectively;
ρ A 、ρ L the density of the purge gas at A, L, respectively;
V A 、V L the flow rates of the purge gas at A, L, respectively;
H A 、H L the elevations of the positions at A, L respectively;
z is the equivalent resistance coefficient of the sweeping from the section A to the section L;
S A 、S L flow areas of the sections at A, L respectively;
g is gravitational acceleration.
The measurement effect is not affected by the change of the gas source pressure and the gas flow rate, which is obtained by the formula (10). Through the design and test calibration of the hearth pressure sampling tube 8, the structural condition of the hearth pressure sampling tube meets the requirement of (10), and finally the sampling point pressure P is obtained A Is equivalent to the true pressure P of the furnace L The measuring result of the hearth pressure can be prevented from being influenced by the pressure of the purging gas source and the flow of the purging gas.
Through the embodiment, ash deposition and blockage of a hearth pressure sampling pipeline are avoided during the running of the unit, and a good effect is achieved in practical application.
What is not described in detail in this specification is all that is known to those skilled in the art.
Furthermore, the foregoing description of the utility model is provided by way of example only. All equivalent changes in construction, features and principles of the utility model according to the inventive concept are intended to be encompassed by the scope of the utility model. Those skilled in the art may make various modifications, additions and substitutions to the described embodiments without departing from the scope of the utility model as defined in the accompanying claims.
Claims (3)
1. The utility model provides a compensation formula furnace pressure sampling sweeps device, characterized by, includes oil water separator (1), compressed air pressure gauge (2), compressed air pressure regulating valve (3), compressed air pipeline (4), rotameter (5), sweeps pipeline (6), sweeps governing valve (7), furnace pressure sampling tube (8), sweeps pipe (9), furnace pressure and draws pressure measurement pipeline (12) and pressure transmitter (13), oil water separator (1), compressed air pressure gauge (2), compressed air pressure regulating valve (3) and rotameter (5) install in proper order on compressed air pipeline (4), compressed air pipeline (4) are connected with sweeping pipeline (6), sweeping pipeline (6) are through sweeping governing valve (7) and sweeping pipe (9) intercommunication, sweeping pipe (9) stretches into the inside of furnace pressure sampling tube (8), furnace pressure sampling tube (8) are installed on furnace wall (10), furnace pressure draws pressure measurement pipeline (12) and the inside intercommunication of furnace pressure sampling tube (8), pressure transmitter (13) are drawn pressure measurement pipeline (12) and are installed on furnace pressure transmission pipeline (12).
2. The compensated furnace pressure sampling purge device according to claim 1, wherein the furnace pressure leading pressure measuring pipe (12) is further connected with a sampling pipe joint (11).
3. The compensated furnace pressure sampling purge device according to claim 1, wherein the furnace pressure sampling cartridge (8) is mounted obliquely to the furnace wall (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322148189.6U CN220532492U (en) | 2023-08-10 | 2023-08-10 | Compensation type hearth pressure sampling and blowing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322148189.6U CN220532492U (en) | 2023-08-10 | 2023-08-10 | Compensation type hearth pressure sampling and blowing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220532492U true CN220532492U (en) | 2024-02-27 |
Family
ID=89973853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322148189.6U Active CN220532492U (en) | 2023-08-10 | 2023-08-10 | Compensation type hearth pressure sampling and blowing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220532492U (en) |
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2023
- 2023-08-10 CN CN202322148189.6U patent/CN220532492U/en active Active
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