CN219245121U

CN219245121U - Flue gas sampling pond

Info

Publication number: CN219245121U
Application number: CN202222948963.7U
Authority: CN
Inventors: 范友; 宋庆飞
Original assignee: Qingdao Zhonghe Electric Power Technology Development Co ltd
Current assignee: Qingdao Zhonghe Electric Power Technology Development Co ltd
Priority date: 2022-11-06
Filing date: 2022-11-06
Publication date: 2023-06-23
Anticipated expiration: 2032-11-06

Abstract

The utility model discloses a flue gas sampling pool, which comprises an outer pipe, wherein an inner pipe is arranged in the outer pipe, a side pipe is arranged at the upper end of the inner pipe, a multipoint sampling air outlet is arranged at the bottom of the outer pipe, a multipoint sampling air inlet is arranged at the left side of the upper end of the outer pipe, an ammonia escape detection hole is arranged at the bottom of the multipoint sampling air inlet, a CEMS detection hole is arranged at the bottom of the ammonia escape detection hole, a comparison hole is arranged at the bottom of the CEMS detection hole, an ash bucket is arranged in the outer pipe, an ash discharging valve is arranged at the left side of the ash bucket, an air locking flap valve is arranged at the bottom of the ash bucket, and flue gas sampled in the flue gas sampling pool is low in dust content and does not have blockage, so that dust removal and sampling are facilitated, and accurate measurement of the NOX value and the ammonia escape value of a flue gas component entering the measuring pool is ensured.

Description

Flue gas sampling pond

Technical Field

The utility model relates to the technical field of flue gas sampling, in particular to a flue gas sampling pool.

Background

In the denitration project of the coal-fired power plant, in order to accurately implement ammonia injection, the NOX value is particularly important as a depending factor of ammonia injection, so that the NOX value is accurately obtained as a central weight, a flue gas sampling pool is needed to be used for obtaining the accurate NOX value, and under the condition that the flue gas sampling structure is reasonable, the total amount of denitration ammonia injection and the components of an ammonia injection branch pipe are controlled by the NOX value to control the opening of a valve, so that the accuracy of ammonia injection is ensured;

the flue gas sampling pool in the current market is characterized in that a sampling pipe is connected with a flue, a plurality of test points are arranged at the outlet of the sampling pipe, multipoint sampling test is carried out, the accuracy of a test structure is improved, and normally the sampling test can carry out two tests of ammonia escape in-situ measurement and CEMS flue extraction measurement, so that the NOX value is more scientifically and accurately judged, and the more accurate NOX value is convenient to obtain;

however, the flue gas sampling pool on the market still has the following problems: the flue gas sampling pond in the present market is in ammonia escape detection and CEMS flue detection time measuring, generally all set up in the pipeline outside, can't handle the dust of detection hole and pipeline inside, leads to great dust in the flue gas to enter into test pipeline, blocks up the pipeline easily, influences normal sample and detection, also can let CEMS extraction probe block up easily, and the filter must be frequently changed, causes the inaccuracy in the measurement to the detection hole does not set up better seal structure with being connected of pipeline, causes the gas leakage condition easily, is inconvenient for concentrating the sample, pollutes external environment easily.

Aiming at the problems, the novel design is carried out on the basis of the original flue gas sampling pool.

Disclosure of Invention

The utility model aims to provide a flue gas sampling pool, which aims to solve the problems that in the prior art, when ammonia escape detection and CEMS flue detection are carried out, the flue gas sampling pool is generally arranged outside a pipeline, dust in a detection hole and the interior of the pipeline cannot be treated, so that larger dust in flue gas can enter a test pipeline and easily block the pipeline to influence normal sampling and detection, a good sealing structure is not arranged in the connection of the detection hole and the pipeline, the air leakage is easy to cause, the centralized sampling is inconvenient, and the external environment is easy to pollute.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a flue gas sampling pond, includes the outer tube, the inside inner tube that is provided with of outer tube, and the inner tube upper end is provided with the side tube, the outer tube bottom is provided with the multipoint sampling gas outlet, outer tube upper end left side is provided with the multipoint sampling air inlet, and the multipoint sampling air inlet bottom is provided with ammonia escape detection hole to ammonia escape detection hole bottom is provided with CEMS detection hole, and CEMS detection hole bottom is provided with compares the hole, the inside ash bucket that is provided with of outer tube, and ash bucket left side is provided with the unloading valve, ash bucket bottom is provided with lock gas flap valve.

Preferably, an inner tube is arranged inside the outer tube, the inner tube and the outer tube form a sampling tube, the inner tube is communicated with the side tube, and the left side of the inner tube is connected with the ammonia escape detection hole, the CEMS detection hole and the comparison hole through a sealing mechanism at the opening side.

Preferably, the bottom of the outer tube is converged with the side tube, the smoke is in downward external rotation in the outer tube, and the smoke in the inner tube is in upward internal rotation.

Preferably, the upper ends of the convergence ports of the outer pipe and the side pipe are provided with air locking flap valves, the air locking flap valves are used for changing the flue gas wind direction, and the upper ends of the air locking flap valves are provided with ash hoppers.

Preferably, the ash bucket comprises a bottom plate, side plates and a rotating shaft, wherein the bottom plate is provided with air holes through which dust cannot pass, the air holes are uniformly distributed on the bottom plate, the upper end of the bottom plate is welded with the side plates, the inclination angles of the side plates are consistent with those of the outer tube, the rotating shaft is arranged on the left side of the bottom plate, the upper end of the rotating shaft is connected with an ash discharge valve, and the ash discharge valve is arranged on the left side of the outer tube.

Preferably, the sealing mechanism comprises an I-shaped piece, a convex ball, an inserting cylinder, a sealing strip and a sealing ring, the I-shaped piece is connected with the convex ball through a connecting rod, the upper end of the convex ball is clamped with the inserting cylinder, the sealing strip is arranged between the inserting cylinder and the I-shaped piece, and a three-layer sealing ring is arranged between the inserting cylinder and the ammonia escape detection hole.

Compared with the prior art, the utility model has the beneficial effects that: the flue gas sampling pool;

1. the flue gas enters the outer tube through the multipoint sampling air inlet, downward rotating outer swirl is formed in the outer tube, the flue gas flows to the air locking flap valve at the bottom of the sampling detection pool along with the outer swirl, smoke dust can sink and fall at the ash bucket due to the action of wind speed flow, the ash bucket is provided with the ash unloading valve on the side face, the flue gas forms lower flue gas containing dust, the flue gas enters the inner tube, the left side of the inner tube is provided with an ammonia escape detection hole, a CEMS detection hole and a comparison hole, multipoint sampling test can be realized, the sampled flue gas contains dust lower, blockage can not occur, and dust removal and sampling are more facilitated.

2. Through all having set up sealing mechanism in ammonia escape detection hole, CEMS detection hole and the junction of comparison hole and outer tube and inner tube, with I-shaped piece card in the opening part of outer tube and inner tube, insert again and insert a section of thick bamboo for insert the recess and the convex ball mutual block of section of thick bamboo, still set up the sealing strip between inserting a section of thick bamboo and I-shaped piece, avoided the entering of outside air, set up three-layer sealing washer between inserting a section of thick bamboo and ammonia escape detection hole gap, guaranteed the gas tightness, can prevent revealing of inside flue gas when preventing outside air entering.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a flue gas sampling tank according to the present utility model;

FIG. 2 is a schematic perspective view of the inner and outer tubes of the present utility model;

FIG. 3 is a schematic view of the ash bucket structure of the present utility model;

fig. 4 is a schematic view of the sealing mechanism of the present utility model in a front cross-section.

In the figure: 1. an outer tube; 2. an inner tube; 3. a side pipe; 4. a multi-point sampling air outlet; 5. multipoint sampling air inlets; 6. ammonia escape detection holes; 7. CEMS detection wells; 8. an alignment hole; 9. an ash discharge valve; 10. an ash bucket; 1001. a bottom plate; 1002. a side plate; 1003. a rotating shaft; 11. locking the air flap valve; 12. a sealing mechanism; 1201. an I-shaped piece; 1202. a convex ball; 1203. a plug cylinder; 1204. a sealing strip; 1205. and (3) sealing rings.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a flue gas sampling pond, including outer tube 1, the inside inner tube 2 that is provided with of outer tube 1, and inner tube 2 upper end is provided with side tube 3, outer tube 1 bottom is provided with multi-point sampling gas outlet 4, outer tube 1 upper end left side is provided with multi-point sampling gas inlet 5, and multi-point sampling gas inlet 5 bottom is provided with ammonia escape detection hole 6, and ammonia escape detection hole 6 bottom is provided with CEMS detection hole 7, CEMS detection hole 7 bottom is provided with the hole of comparing in addition 8, outer tube 1 inside is provided with ash bucket 10, and ash bucket 10 left side is provided with unloading valve 9, ash bucket 10 bottom is provided with lock gas flap valve 11.

The inside inner tube 2 that is provided with of outer tube 1, and inner tube 2 and outer tube 1 constitute the sampling tube to inner tube 2 link up with side tube 3, and the ammonia escape detection hole 6, CEMS detection hole 7 and comparison hole 8 are connected through opening side's sealing mechanism 12 in inner tube 2 left side, can guarantee the multipoint sampling.

The bottom of the outer tube 1 is converged with the side tube 3, and the flue gas is in downward outer rotational flow at the outer tube 1, and the flue gas in the inner tube 2 is in upward inner rotational flow, so that the flow direction of the flue gas is changed, and dust falls off.

The outer tube 1 and the side tube 3 gather mouthful upper end and are provided with lock gas flap valve 11, and lock gas flap valve 11 is used for changing the flue gas wind direction to lock gas flap valve 11 upper end is provided with ash bucket 10, conveniently collects the dust that drops.

The ash bucket 10 is including bottom plate 1001, curb plate 1002 and pivot 1003, and bottom plate 1001 is provided with the gas pocket that the dust can't pass through to gas pocket evenly distributed is on bottom plate 1001, and bottom plate 1001 upper end welding has curb plate 1002, and curb plate 1002 inclination is unanimous with the inclination of outer tube 1, and bottom plate 1001 left side is provided with pivot 1003, and the pivot 1003 upper end is connected with ash discharge valve 9, and ash discharge valve 9 sets up in outer tube 1 left side, can conveniently clear up ash bucket 10.

The sealing mechanism 12 comprises an I-shaped piece 1201, a convex ball 1202, an insert cylinder 1203, a sealing strip 1204 and a sealing ring 1205, wherein the I-shaped piece 1201 is connected with the convex ball 1202 through a connecting rod, the insert cylinder 1203 is clamped at the upper end of the convex ball 1202, the sealing strip 1204 is arranged between the insert cylinder 1203 and the I-shaped piece 1201, and a three-layer sealing ring 1205 is arranged between the insert cylinder 1203 and the ammonia escape detection hole 6, so that the whole device has better air tightness.

Working principle: when the flue gas sampling pool is used, firstly, flue gas enters the outer pipe 1 through the multipoint sampling air inlet 5, downward rotating external rotation flow is formed in the outer pipe 1, and flows to the air locking flap valve 11 at the bottom of the sampling detection pool along with the external rotation flow, due to the action of wind speed flow, the flue gas can sink and fall on the ash bucket 10, the ash bucket 10 is provided with the ash discharging valve 9 on the upper side surface, at the moment, the flue gas forms low-dust flue gas, so that the air locking flap valve 11 cannot be turned, the flue gas is blocked from moving upwards, and enters the inner pipe 2, the left side of the inner pipe 2 is provided with the ammonia escape detection hole 6, the CEMS detection hole 7 and the comparison hole 8, multipoint sampling test can be realized, then the flue gas flows to the multipoint sampling air outlet 4 through the side pipe 3, the return of the gas is completed, and when the flue gas after dust removal enters the internal measurement pool, the measurement is performed under the operation of the extraction type ammonia escape and CEMS system, when the ash bucket 10 needs to be cleaned, only the ash discharging valve 9 is required to be rotated outwards, the ash discharging valve 9 and the bottom plate 1001 are connected with the rotating shaft 1003, the bottom plate 1001 is inclined at the moment, dust at the upper end of the bottom plate 1001 falls off, the bottom plate 1001 is provided with air holes through which only air passes, the dust is prevented from falling off, in order to improve the tightness of the whole sampling pool, the joints of the ammonia escape detection hole 6, the CEMS detection hole 7 and the comparison hole 8 with the outer tube 1 and the inner tube 2 are provided with sealing mechanisms 12, the I-shaped piece 1201 is clamped at the openings of the outer tube 1 and the inner tube 2, the insertion barrel 1203 is inserted, the groove of the insertion barrel 1203 is clamped with the convex ball 1202, a sealing strip 1204 is further arranged between the insertion barrel 1203 and the I-shaped piece 1201, the entry of external air is avoided, a three-layer sealing ring 1205 is arranged between the insertion barrel 1203 and the gap of the ammonia escape detection hole 6, ensuring tightness, which is not described in detail in the present description, belongs to the prior art known to the person skilled in the art.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a flue gas sampling pond, includes outer tube (1), its characterized in that: the inside of the outer tube (1) is provided with an inner tube (2), the upper end of the inner tube (2) is provided with a side tube (3), the bottom of the outer tube (1) is provided with a multipoint sampling air outlet (4), the left side of the upper end of the outer tube (1) is provided with a multipoint sampling air inlet (5), the bottom of the multipoint sampling air inlet (5) is provided with an ammonia escape detection hole (6), and ammonia escape detection hole (6) bottom is provided with CEMS detection hole (7), and CEMS detection hole (7) bottom is provided with comparison hole (8) moreover, the inside ash bucket (10) that is provided with of outer tube (1), and ash bucket (10) left side is provided with ash discharge valve (9), ash bucket (10) bottom is provided with lock gas flap valve (11).

2. A flue gas sampling cell according to claim 1, wherein: the inner tube (2) and the outer tube (1) form a sampling tube, the inner tube (2) is communicated with the side tube (3), and the left side of the inner tube (2) is connected with an ammonia escape detection hole (6), a CEMS detection hole (7) and a comparison hole (8) through an opening side sealing mechanism (12).

3. A flue gas sampling cell according to claim 1, wherein: the bottom of the outer tube (1) is converged with the side tube (3), the smoke is in downward outer swirling flow in the outer tube (1), and the smoke in the inner tube (2) is in upward inner swirling flow.

4. A flue gas sampling cell according to claim 1, wherein: the outer pipe (1) and the side pipe (3) are assembled and mouthful upper end is provided with lock gas flap valve (11), and lock gas flap valve (11) are used for changing flue gas wind direction to lock gas flap valve (11) upper end is provided with ash bucket (10).

5. A flue gas sampling cell according to claim 1, wherein: the ash bucket (10) comprises a bottom plate (1001), side plates (1002) and a rotating shaft (1003), wherein the bottom plate (1001) is provided with air holes through which dust cannot pass, the air holes are uniformly distributed on the bottom plate (1001), the upper end of the bottom plate (1001) is welded with the side plates (1002), the inclination angle of the side plates (1002) is consistent with that of the outer tube (1), the rotating shaft (1003) is arranged on the left side of the bottom plate (1001), the upper end of the rotating shaft (1003) is connected with an ash discharge valve (9), and the ash discharge valve (9) is arranged on the left side of the outer tube (1).

6. A smoke sampling cell according to claim 2, wherein: sealing mechanism (12) are including worker's shaped piece (1201), protruding ball (1202), insert a section of thick bamboo (1203), sealing strip (1204) and sealing washer (1205), and worker's shaped piece (1201) are connected protruding ball (1202) through the connecting rod to protruding ball (1202) upper end block has inserts a section of thick bamboo (1203), be provided with sealing strip (1204) between inserting a section of thick bamboo (1203) and worker's shaped piece (1201), be provided with three-layer sealing washer (1205) between inserting a section of thick bamboo (1203) and ammonia escape detection hole (6).