CN118482774A

CN118482774A - Be used for denitration system flue to flow automatically and prevent stifled flue gas flow measuring device

Info

Publication number: CN118482774A
Application number: CN202410395748.XA
Authority: CN
Inventors: 闵国政; 徐铁军; 姚琨; 闵祥硕; 陈晨; 陈天宇; 贾志军
Original assignee: Shandong Xingguang Valley Power Technology Co ltd; Huadian Tengzhou Xinyuan Thermoelectricity Co ltd
Current assignee: Shandong Xingguang Valley Power Technology Co ltd; Huadian Tengzhou Xinyuan Thermoelectricity Co ltd
Priority date: 2024-04-02
Filing date: 2024-04-02
Publication date: 2024-08-13

Abstract

The invention discloses a self-flowing anti-blocking flue gas flow measuring device for a flue of a denitration system, which has the beneficial effects that the design of the device skillfully integrates a differential pressure type flow monitoring, anti-blocking self-cleaning structure and various practical components, and shows high technical innovation and practicability; first, differential pressure flow monitoring is one of the core functions of the device; based on the basic principle of a differential pressure flowmeter, namely Bernoulli equation, the flow is monitored through negative pressure differences in a dynamic pressure meter tube and a static pressure meter tube; the design not only ensures the accuracy of flow monitoring, but also provides key data support for the subsequent anti-blocking self-cleaning function; secondly, the anti-blocking self-cleaning structure is a further bright point of the device.

Description

Be used for denitration system flue to flow automatically and prevent stifled flue gas flow measuring device

Technical Field

The invention relates to the technical field of flue flow measurement equipment, in particular to a self-flowing anti-blocking flue gas flow measurement device for a flue of a denitration system.

Background

A denitration system refers to a device or equipment for reducing or removing nitrogen oxides (NOx) in flue gas, and has a main function of reducing the influence of the nitrogen oxides on the environment. In the fields of thermal power plants, industrial boilers, industrial kilns and the like, the denitration system is widely applied to reduce the pollution to the atmosphere and protect the environment. According to technical classification, the denitration system can be classified into Selective Catalytic Reduction (SCR) denitration, selective non-catalytic reduction (SNCR) denitration, adsorption denitration and the like; first, in the flue of this system, the flue gas contains a large amount of dust and particulates, which are easily deposited in the flue during the flow process, resulting in clogging. The self-flow anti-blocking design can optimize the structure and layout of the flow channel, so that the flue gas can smoothly pass through a measuring area, and the deposition of dust and particles is reduced, thereby preventing blocking; secondly, the blockage can affect the accurate measurement of the flue gas flow, resulting in inaccurate control of the denitration system. By adopting the self-flowing anti-blocking design, the accuracy and the reliability of the flue gas flow measuring device can be ensured, and powerful support is provided for the stable operation of the denitration system; in addition, clogging can also have an impact on the operating efficiency of the denitration system, increasing operating costs. The self-flow anti-blocking design can reduce the maintenance and cleaning frequency, reduce the running cost and improve the overall efficiency of the system, but the self-flow anti-blocking system on the general out-of-stock system is difficult to reduce the influence on flow measurement to the greatest extent, and is difficult to integrate the two together, so that the general device is complex to install, time and labor are wasted when overhauling, and aiming at the problems, the technical means for solving the problems possibly exist in the prior art, but the scheme is intended to provide an alternative or replacement technical scheme.

Disclosure of Invention

The technical scheme of the invention for achieving the purpose is as follows: a self-flowing anti-blocking flue gas flow measurement device for a flue of a denitration system, comprising: the system flue comprises a system flue shell, a shell inner heat preservation layer and a welding flange seat, wherein the shell inner heat preservation layer is arranged in the system flue shell, the welding flange seat is arranged in the shell inner heat preservation layer and is connected with the system flue shell, and a differential pressure type flow monitoring anti-blocking self-cleaning structure is arranged on the welding flange seat;

The differential pressure type flow monitoring anti-blocking self-cleaning structure comprises: an external pressurizing transmitter, a dynamic pressure instrument tube, a static pressure instrument tube, a pair of differential pressure conducting pipelines, a plurality of flue gas flow bearing tube bodies, a pair of external guide pipes and a pair of flow indicators;

The external pressurizing transmitter is connected with the outer side of the system flue shell, the dynamic pressure meter tube is inserted into the welding flange seat, the dynamic pressure meter tube is inserted into the system flue shell, the static pressure meter tube is inserted into the welding flange seat, the static pressure meter tube is inserted into the system flue shell, a pair of differential pressure conduction pipelines are respectively connected with the dynamic pressure meter tube and the static pressure meter tube, a plurality of flue gas circulation bearing pipes are respectively arranged on the pair of differential pressure conduction pipelines, a pair of outer guide pipes are respectively connected with the dynamic pressure meter tube and the static pressure meter tube, a pair of flow indicators are respectively arranged on the pair of outer guide pipes, a pair of outer guide pipes are respectively connected with the external pressurizing transmitter, a plurality of flue gas circulation bearing pipes are respectively provided with a vibration type crystal inclination angle cleaning assembly, and the external pressurizing transmitter is provided with an inclined angle fixing assembly;

In the above description, it is known that the flue gas flow rates in the inlet and outlet flues of the denitration SCR reactor have an extremely important reference effect on the fine operation control of the denitration system, and it is clear that the soot and ammonia gas at high temperature can enter the measuring element and the inner cavity of the pressure guiding pipeline in a manner of impact and diffusion, and are accumulated in an adhering manner. Particularly ammonia gas can crystallize after encountering cold, so that blockage is aggravated, when the flue gas flows in a system flue shell, the heat of the flue gas is protected by an insulating layer in the shell, so that a great amount of crystallization and agglomeration can not occur at the moment, a welding flange seat can bear a dynamic pressure meter tube, a static pressure meter tube and a pair of differential pressure conduction pipelines to hang in the system flue shell, so that a plurality of flue gas flow tube bodies capture the flowing flue gas, the differential pressure flowing in the flue gas is respectively conducted into the dynamic pressure meter tube and the static pressure meter tube through the pair of differential pressure conduction pipelines, and the dynamic pressure meter tube and the static pressure meter tube are respectively connected with an air pressure sensor, so that the flow rate of the flue gas flowing in the system flue shell is measured through the pressure difference; it is also clear that in the denitration system, whether the inlet flue or the outlet flue, the operation is in a negative pressure state, and the pressure in the dynamic pressure meter tube and the static pressure meter tube is lower than the atmospheric pressure outside the flue. The static pressure value is generally in the range of-500 Pa to-3000 Pa, under this condition, two pressure output signals received by the sensor are both negative pressures, therefore, a pair of external guide pipes connected to the external pressurization transmitter can filter and heat external air through an air inlet, an air heater and a dust screen arranged on the external pressurization transmitter, and then automatically and slowly flow into the manometer tube and the hydrostatic meter tube under the condition that the external air pressure is greater than the internal air pressure, so that a small cyclone is formed in the manometer tube and the hydrostatic meter tube, and crystallization siltation is prevented at the position of a cavity where the sensor is connected, a pair of flow indicators arranged on the pair of external guide pipes can display the air flow size in the external guide pipes at this time, and a fine adjustment valve arranged on the flow indicators can make the air flow in the pair of external guide pipes equal, so as to eliminate the influence of flow monitoring (the basic measurement principle of the differential pressure flowmeter is in accordance with Bernoulli equation, wherein after deduction, the core variable is the high pressure P=p and the low pressure P+ is controlled by the differential pressure between the differential pressure sensor and the differential pressure sensor, and the differential pressure sensor is reasonably applied to the positive pressure P+to the hydrostatic meter tube, and the differential pressure sensor is not controlled to the positive pressure P+P+to the differential pressure sensor.

Preferably, the vibration type crystal cleaning assembly comprises: the device comprises a plurality of power bearing chambers, a plurality of top bearing seats, a plurality of bottom bearing seats, a plurality of connecting springs, a plurality of telescopic air rods and a plurality of built-in hollowed-out net pipes;

The power bearing chambers are respectively arranged on the smoke gas circulation bearing pipe bodies, the top bearing seats are respectively arranged in the power bearing chambers, the top bearing seats are respectively inserted into the connecting springs, the bottom bearing seats are respectively arranged on the built-in hollowed-out net pipes, the bottom bearing seats are respectively inserted into the connecting springs, the bottom bearing seats are respectively corresponding to the top bearing seats, the built-in hollowed-out net pipes are respectively arranged in the smoke gas circulation bearing pipe bodies, the telescopic air rods are respectively inserted into the connecting springs, and the telescopic air rods are respectively connected with the top bearing seats and the bottom bearing seats;

It should be noted that, in the above-mentioned, after using this device for a long time, unavoidable impurities such as coal ash can slowly deposit in a plurality of flue gas circulation socket, thereby influence its efficiency of entrapment smoke and dust, only need start the integrated air pump that sets up on the external pressurization changer this moment, integrated air pump is connected with a plurality of flexible gas poles through the pipeline respectively, thereby after inflating or gassing a plurality of flexible gas poles drive a plurality of top and bear seat and a plurality of bottom and bear seat and be close to each other or keep away from, and then make the linking spring that corresponds constantly compressed or tensile, thereby make built-in fretwork network management at the internal up-and-down motion of corresponding flue gas circulation socket, and because built-in fretwork is porous hollow structure, therefore rock from top to bottom and constantly contact flue gas circulation socket internal lateral wall after, coal ash and impurity etc. that are attached to it can drop under vibrations, and take away along with the flue gas, thereby accomplish self-cleaning.

Preferably, the oblique inclination fixing assembly includes: the device comprises a plurality of bolt screwing bases, a plurality of inclination angle extrusion pushing blocks, a plurality of bolt sliding grooves and a plurality of retention locking bolts;

The plurality of bolt screwing bases are respectively and fixedly arranged on the system flue shell, the plurality of inclination angle extrusion pushing blocks are respectively provided with a plurality of bolt sliding grooves, the plurality of inclination angle extrusion pushing blocks are respectively connected with the plurality of bolt screwing bases, the plurality of bolt screwing bases are respectively provided with a plurality of threaded openings, the plurality of retention locking bolts are respectively inserted into the plurality of bolt sliding grooves, and the plurality of retention locking bolts are respectively inserted into the plurality of bolt screwing bases through the plurality of threaded openings;

It should be noted that, in the above description, the external pressurization transmitter is used as a multifunctional integrated component, the frequency of maintaining and installing the external pressurization transmitter is much higher than that of other components, therefore, the external pressurization transmitter is fixed by matching four dip angle extrusion push blocks with four retention locking bolts, four push block coupling grooves are respectively arranged on the external pressurization transmitter side wall, therefore, as long as the four dip angle extrusion push blocks are installed in place and are embedded into the four push block coupling grooves, the installation and fixation can be completed, when the retention locking bolts are screwed, the retention locking bolts can continuously downwards extrude the dip angle extrusion push blocks, so that the dip angle extrusion push blocks are tightly attached to the slope of the screw base, and as the screwing degree is increased, the dip angle extrusion push blocks can also tightly press the side wall of the external pressurization transmitter under the action of the inclined plane of the screw base until the embedded push block coupling grooves are completed, and the universal hexagonal coupling holes arranged on the retention locking bolts can enable the retention locking bolts to be screwed by the hexagonal screws, so that the installation of the rotary screwdriver is convenient.

Preferably, an air inlet is arranged on the external pressurizing transmitter.

Preferably, an air heater is arranged on the external pressurizing transmitter.

Preferably, a fine adjustment valve is arranged on the flow indicator.

Preferably, the built-in hollowed-out net pipe is provided with a wear-resistant coating.

Preferably, the retention locking bolt is provided with a universal hexagonal coupling hole.

Preferably, a dust screen is arranged on the external pressurizing transmitter.

Preferably, the external pressurizing transmitter is provided with an integrated air pump;

Compared with the prior art, the name manufactured by the technical scheme of the invention is as follows: the design of the device skillfully integrates a differential pressure type flow monitoring, anti-blocking self-cleaning structure and various practical components, and shows high technical innovation and practicability; first, differential pressure flow monitoring is one of the core functions of the device; based on the basic principle of a differential pressure flowmeter, namely Bernoulli equation, the flow is monitored through negative pressure differences in a dynamic pressure meter tube and a static pressure meter tube; the design not only ensures the accuracy of flow monitoring, but also provides key data support for the subsequent anti-blocking self-cleaning function; secondly, the anti-blocking self-cleaning structure is a further bright point of the device; according to the structure, external air is introduced, and after being filtered and heated, the external air is automatically guided into a matched dynamic pressure instrument tube and a static pressure instrument tube by utilizing pressure difference; the design can effectively prevent impurities such as ammonia gas, coal ash and the like from being deposited at the joint pipeline of the differential pressure type flowmeter, thereby avoiding the occurrence of blocking; meanwhile, continuous external air flow also plays a role in cleaning the pipeline, so that the stability and reliability of the device are further enhanced; in addition, the addition of the vibration type crystal cleaning component enables the device to be integrally vibration cleaned in a long-term use process. The cleaning mode can effectively remove impurities and crystals attached to the inside of the device, prolongs the service life of the device, reduces the frequency and difficulty of manual cleaning, and reduces the maintenance cost; finally, the design of the oblique inclination angle fixing assembly enables the disassembly, assembly and maintenance of the external pressurizing transmitter to be more convenient; the assembly not only improves the usability of the device, but also reduces the difficulty of maintenance, so that operators can complete related tasks more quickly, and the working efficiency is improved; in conclusion, the device realizes accurate monitoring of flow, effective cleaning of a pipeline and convenient maintenance of the device through ingenious combination of the differential pressure type flow monitoring, the anti-blockage self-cleaning structure and various practical components; the design not only improves the performance and stability of the device, but also reduces the maintenance cost and the use difficulty, and provides powerful technical support for the production operation of related industries.

Drawings

Fig. 1 is a schematic diagram of a front view structure of a flue self-flowing anti-blocking flue gas flow measuring device for a denitration system.

Fig. 2 is an enlarged partial schematic view of "a" in fig. 1.

Fig. 3 is a schematic side view structure of a flue self-flowing anti-blocking flue gas flow measuring device for a denitration system.

Fig. 4 is an enlarged partial schematic view of "B" in fig. 3.

Fig. 5 is a schematic top view of a flue self-flowing anti-blocking flue gas flow measuring device for a denitration system.

Fig. 6 is a schematic diagram of a flue gas flow connection pipe body of the flue gas flow self-flowing anti-blocking flue gas flow measurement device for a denitration system.

In the figure: 1. a system flue housing; 2. a heat preservation layer in the shell; 3. welding a flange seat; 4. an external pressurizing transmitter; 5. a hydrodynamic instrument tube; 6. a hydrostatic instrumentation tube; 7. a differential pressure conductive conduit; 8. a flue gas flow receiving tube body; 9. an outer guide catheter; 10. a flow indicator; 11. a power bearing chamber; 12. a top bearing seat; 13. a bottom bearing seat; 14. a connecting spring; 15. a telescopic air rod; 16. a hollow net pipe is arranged in the hollow net pipe; 17. screwing the bolts on the base; 18. the pushing block is extruded at an inclined angle; 19. a bolt chute; 20. the locking bolt is retained.

Detailed Description

All electric components in the scheme are connected with an adaptive power supply through wires by a person skilled in the art, and an appropriate controller is selected according to actual conditions so as to meet control requirements, specific connection and control sequences, and the electric connection is completed by referring to the following working principles in the working sequence among the electric components, wherein the detailed connection means are known in the art, and the following main description of the working principles and processes is omitted from the description of electric control.

Examples

The present invention will be described in detail with reference to the accompanying drawings, as shown in fig. 1 to 6, a flue self-flowing anti-blocking flue gas flow measuring device for a denitration system, comprising: the system flue comprises a system flue shell 1, a shell inner heat preservation layer 2 and a welding flange seat 3, wherein the shell inner heat preservation layer 2 is arranged in the system flue shell 1, the welding flange seat 3 is arranged in the shell inner heat preservation layer 2, the welding flange seat 3 is connected with the system flue shell 1, and a differential pressure type flow monitoring anti-blocking self-cleaning structure is arranged on the welding flange seat 3; the differential pressure type flow monitoring anti-blocking self-cleaning structure comprises: an external pressurizing transmitter 4, a dynamic pressure meter tube 5, a static pressure meter tube 6, a pair of differential pressure conduction pipelines 7, a plurality of flue gas flow joint pipe bodies 8, a pair of external guide pipes 9 and a pair of flow indicators 10; The external pressurizing transmitter 4 is connected with the outer side of the system flue shell 1, the dynamic pressure meter tube 5 is inserted on the welding flange seat 3, the dynamic pressure meter tube 5 is inserted in the system flue shell 1, the static pressure meter tube 6 is inserted on the welding flange seat 3, the static pressure meter tube 6 is inserted in the system flue shell 1, a pair of differential pressure conduction pipelines 7 are respectively connected with the dynamic pressure meter tube 5 and the static pressure meter tube 6, a plurality of flue gas circulation bearing tubes 8 are respectively arranged on the pair of differential pressure conduction pipelines 7, a pair of external guide pipes 9 are respectively connected with the dynamic pressure meter tube 5 and the static pressure meter tube 6, The pair of flow indicators 10 are respectively arranged on the pair of outer guide pipes 9, the pair of outer guide pipes 9 are respectively connected with the external pressurizing transmitter 4, the plurality of flue gas circulation joint pipes 8 are respectively provided with vibration type crystal cleaning components, and the external pressurizing transmitter 4 is provided with an oblique inclination angle fixing component; the vibratory crystal cleaning assembly includes: the power bearing room comprises a plurality of power bearing rooms 11, a plurality of top bearing seats 12, a plurality of bottom bearing seats 13, a plurality of connecting springs 14, a plurality of telescopic air rods 15 and a plurality of built-in hollowed-out net pipes 16; The power bearing chambers 11 are respectively arranged on the smoke gas circulation connection pipe bodies 8, the top bearing seats 12 are respectively arranged in the power bearing chambers 11, the top bearing seats 12 are respectively inserted on the connecting springs 14, the bottom bearing seats 13 are respectively arranged on the hollow network pipes 16, the bottom bearing seats 13 are respectively inserted on the connecting springs 14, the bottom bearing seats 13 are respectively corresponding to the top bearing seats 12, the hollow network pipes 16 are respectively arranged in the smoke gas circulation connection pipe bodies 8, The plurality of telescopic air rods 15 are respectively inserted into the plurality of connecting springs 14, and the plurality of telescopic air rods 15 are respectively connected with the plurality of top bearing seats 12 and the plurality of bottom bearing seats; The oblique inclination angle fixing assembly comprises: a plurality of bolt screwing bases 17, a plurality of inclination angle extrusion pushing blocks 18, a plurality of bolt sliding grooves 19 and a plurality of retention locking bolts 20; the system flue shell comprises a system flue shell body 1, a plurality of bolt screwing bases 17, a plurality of inclination angle extrusion pushing blocks 18, a plurality of bolt sliding grooves 19, a plurality of inclination angle extrusion pushing blocks 18, a plurality of bolt screwing bases 17, a plurality of fixing locking bolts 20 and a plurality of fixing locking bolts, wherein the plurality of bolt screwing bases 17 are respectively fixedly installed on the system flue shell body 1, the plurality of inclination angle extrusion pushing blocks 18 are respectively provided with the plurality of bolt sliding grooves 19, the plurality of inclination angle extrusion pushing blocks 18 are respectively connected with the plurality of bolt screwing bases 17, the plurality of bolt screwing bases 17 are respectively provided with a plurality of threaded openings, the plurality of fixing locking bolts 20 are respectively inserted in the plurality of bolt sliding grooves 19, and the plurality of fixing locking bolts 20 are respectively inserted in the plurality of bolt screwing bases 17 through the threaded openings.

It is known from fig. 1-6 that the flue gas flow rate in the inlet and outlet flues of the denitration SCR reactor has an extremely important reference function for the fine operation control of the denitration system, and it is clear that the coal ash and the ammonia gas can enter the measuring element and the inner cavity of the pressure guiding pipeline in a impacting and diffusing mode at high temperature and are attached and accumulated. Particularly ammonia gas, can crystallize after encountering cold, so as to cause the blockage to be aggravated, so that when the flue gas flows in the system flue shell 1, the heat of the flue gas is protected by the heat insulation layer 2 in the shell, so that a great amount of crystallization and condensation blocks can not occur at the moment basically, the welding flange seat 3 can bear the dynamic pressure meter tube 5, the static pressure meter tube 6 and the pair of differential pressure conduction pipelines 7 to hang in the system flue shell 1, the plurality of flue gas circulation joint tubes 8 can trap the flowing flue gas, and the differential pressure of the flue gas flowing is respectively conducted into the dynamic pressure meter tube 5 and the static pressure meter tube 6 through the pair of differential pressure conduction pipelines 7, The dynamic pressure gauge pipe 5 and the static pressure gauge pipe 6 are respectively connected with the air pressure sensor, so that the flow rate of the flue gas flowing in the flue shell 1 of the system is measured through pressure difference; it should be clear that the operation of the denitration system, whether the inlet flue or the outlet flue, is in a negative pressure state, and that the air pressure in the dynamic pressure meter tube 5 and the static pressure meter tube 6 is lower than the air pressure outside the flue. The static pressure value is generally in the range of-500 Pa to-3000 Pa, under the condition that two pressure output signals received by the sensor are actually negative pressure, so that a pair of outer guide pipes 9 connected to the external pressurizing transmitter 4 can filter and heat external air through an air inlet, an air heater and a dust screen arranged on the external pressurizing transmitter 4, and then automatically and slowly flow into the dynamic pressure meter tube 5 and the static pressure meter tube 6 under the condition that the external air pressure is larger than the internal air pressure, thereby forming a smaller cyclone in the dynamic pressure meter tube 5 and the static pressure meter tube 6, preventing crystals from accumulating in a cavity connected with the sensor, the pair of flow indicators 10 installed on the pair of outer guide pipes 9 can display the air flow in the outer guide pipes 9 at this time, and the fine adjustment valve installed on the flow indicators 10 can make the air flow in the pair of outer guide pipes 9 equal in flow rate, so as to eliminate the influence on flow monitoring (the basic measurement principle of the differential pressure type flowmeter is to follow bernoulli equation, wherein after deduction, the core variable is the device output differential pressure Pd, pd=psensing-psensing, when the same P timing is applied in the guide pipes of psensing and psensing at the same time, the differential pressure is pd= (psensing+psensing) - (psensing+psensing), we have no effect on the measurements as long as the amount of positive pressure applied to the hydrodynamic meter tube 5 and the hydrostatic meter tube 6 is controlled to be consistent and kept within a reasonable range); After the device is used for a long time, impurities such as coal ash and the like are inevitably deposited in the smoke circulation bearing pipe bodies 8 slowly, so that the efficiency of capturing smoke dust is affected, at the moment, only an integrated air pump arranged on the external pressurizing transmitter 4 is started, and the integrated air pump is respectively connected with the telescopic air rods 15 through pipelines, so that the telescopic air rods 15 are inflated or deflated to drive the top bearing seats 12 and the bottom bearing seats 13 to be close to or far away from each other, the corresponding connecting springs 14 are continuously compressed or stretched, the built-in hollow net pipes 16 move up and down in the corresponding smoke circulation bearing pipe bodies 8, in addition, because the built-in hollowed-out net pipe 16 is of a porous hollowed-out structure, after shaking up and down and continuously contacting the inner side wall of the smoke flow-through joint pipe body 8, coal ash, impurities and the like attached to the built-in hollowed-out net pipe can fall off under vibration and be taken away by smoke along with the smoke, so that self-cleaning is completed; The external pressurizing transmitter 4 is used as a multifunctional integrated component, the maintenance and installation frequency of the external pressurizing transmitter 4 is much higher than that of other components, so that the external pressurizing transmitter 4 is fixed on the outer side wall of the external pressurizing transmitter 4 through the four dip angle extruding push blocks 18 matched with the four retention locking bolts 20, four push block coupling grooves are respectively arranged on the outer side wall of the external pressurizing transmitter 4, so that the installation and the fixation can be completed as long as the four dip angle extruding push blocks 18 are installed in place and are embedded into the four push block coupling grooves, when the retention locking bolts 20 are screwed, the retention locking bolts 20 continuously downwards extrude the dip angle extruding push blocks 18, so that the dip angle extruding push blocks 18 are tightly attached to the slopes of the bolt screwing bases 17, And with the increase of the screwing degree, the dip angle extrusion push block 18 can also tightly press the side wall of the external pressurization transmitter 4 under the action of the inclined surface of the bolt screwing base 17 until the external pressurization transmitter 4 is embedded into the push block coupling groove, so that the external pressurization transmitter 4 is fixed, and the universal hexagonal coupling hole arranged on the retention locking bolt 20 can enable the retention locking bolt 20 to be screwed by a universal hexagonal screwdriver, thereby facilitating the installation.

The above technical solution only represents the preferred technical solution of the present invention, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present invention, and the technical solution falls within the scope of the present invention.

Claims

1. A self-flowing anti-blocking flue gas flow measurement device for a flue of a denitration system, comprising: the system flue shell is characterized in that the shell inner heat preservation layer (2) is arranged in the system flue shell (1), the welding flange seat (3) is arranged in the shell inner heat preservation layer (2), the welding flange seat (3) is connected with the system flue shell (1), and the welding flange seat (3) is provided with a differential pressure type flow monitoring anti-blocking self-cleaning structure;

The differential pressure type flow monitoring anti-blocking self-cleaning structure comprises: an external pressurizing transmitter (4), a dynamic pressure instrument tube (5), a static pressure instrument tube (6), a pair of differential pressure conduction pipelines (7), a plurality of flue gas circulation joint pipe bodies (8), a pair of external guide pipes (9) and a pair of flow indicators (10);

External pressurization changer (4) with system flue casing (1) outside is connected, dynamic pressure meter gauge pipe (5) cartridge is in on welding flange seat (3), just dynamic pressure meter gauge pipe (5) cartridge is in system flue casing (1), static pressure meter gauge pipe (6) cartridge is in on welding flange seat (3), just static pressure meter gauge pipe (6) cartridge is in system flue casing (1), a pair of differential pressure conduction pipe (7) respectively with dynamic pressure meter gauge pipe (5) and static pressure meter gauge pipe (6) are connected, a plurality of flue gas circulation bearing pipe body (8) are installed respectively in a pair of differential pressure conduction pipe (7), a pair of outer guide pipe (9) respectively with dynamic pressure meter gauge pipe (5) and static pressure meter gauge pipe (6) are connected, a pair of flow indicator (10) are installed respectively in a pair of outer guide pipe (9) in system flue casing (1), a pair of outer guide pipe (9) and a pair of outer guide pipe (4) are connected with pressurization assembly (4) are installed respectively to pressurization assembly.

2. The apparatus for self-flowing, anti-blocking flue gas flow measurement of a flue gas for a denitration system of claim 1, wherein the vibratory crystal cleaning assembly comprises: the device comprises a plurality of power bearing chambers (11), a plurality of top bearing seats (12), a plurality of bottom bearing seats (13), a plurality of connecting springs (14), a plurality of telescopic air rods (15) and a plurality of built-in hollowed-out net pipes (16);

The power bearing room (11) is respectively installed on the flue gas circulation bearing pipe body (8), the top bearing seat (12) is respectively installed in the power bearing room (11), the top bearing seat (12) is respectively inserted in the connecting springs (14), the bottom bearing seat (13) is respectively installed in the built-in hollow-out net pipes (16), the bottom bearing seat (13) is respectively inserted in the connecting springs (14), the bottom bearing seat (13) is respectively corresponding to the top bearing seat (12), the built-in hollow-out net pipes (16) are respectively installed in the flue gas circulation bearing pipe body (8), the telescopic air rods (15) are respectively inserted in the connecting springs (14), and the telescopic air rods (15) are respectively connected with the top bearing seats (12) and the bottom bearing seats.

3. The apparatus for measuring flue self-flowing anti-blocking flue gas flow rate of a denitration system according to claim 2, wherein the oblique inclination fixing assembly comprises: a plurality of bolt screwing bases (17), a plurality of inclination angle extrusion pushing blocks (18), a plurality of bolt sliding grooves (19) and a plurality of retention locking bolts (20);

The screw bolt screwing base (17) is fixedly installed on the system flue shell (1), the screw bolt sliding grooves (19) are formed in the dip angle extrusion pushing blocks (18), the dip angle extrusion pushing blocks (18) are connected with the screw bolt screwing base (17), screw thread openings are formed in the screw bolt screwing base (17), the retention locking bolts (20) are inserted into the screw bolt sliding grooves (19), and the retention locking bolts (20) are inserted into the screw bolt screwing base (17) through the screw thread openings.

4. The flue self-flowing anti-blocking flue gas flow measuring device for the denitration system according to claim 3, wherein an air inlet is formed in the external pressurizing transmitter (4).

5. The flue self-flowing anti-blocking flue gas flow measuring device for the denitration system according to claim 4 is characterized in that an air heater is arranged on the external pressurizing transmitter (4).

6. The flue self-flowing anti-blocking flue gas flow measuring device for the denitration system according to claim 5, wherein a fine adjustment valve is arranged on the flow indicator (10).

7. The self-flowing anti-blocking flue gas flow measuring device for the flue of the denitration system according to claim 6, wherein the built-in hollowed-out net pipe (16) is provided with a wear-resistant coating.

8. The flue self-flowing anti-blocking flue gas flow measuring device for a denitration system according to claim 7, wherein the retention locking bolt (20) is provided with a universal hexagonal coupling hole.

9. The flue self-flowing anti-blocking flue gas flow measuring device for the denitration system according to claim 8 is characterized in that a dust screen is arranged on the external pressurizing transmitter (4).

10. The flue self-flowing anti-blocking flue gas flow measuring device for the denitration system according to claim 9, wherein the external pressurizing transmitter (4) is provided with an integrated air pump.