CN209783999U - Unit combined type flue gas composition on-line monitoring system - Google Patents
Unit combined type flue gas composition on-line monitoring system Download PDFInfo
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- CN209783999U CN209783999U CN201920265365.5U CN201920265365U CN209783999U CN 209783999 U CN209783999 U CN 209783999U CN 201920265365 U CN201920265365 U CN 201920265365U CN 209783999 U CN209783999 U CN 209783999U
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Abstract
The utility model relates to a unit combination formula flue gas composition on-line monitoring system, including a plurality of flue gas composition on-line monitoring units, flue gas composition on-line monitoring unit is including flue gas sampling device (1), flue gas flow straightener (3), mixed buffer tank (4), flue gas preprocessor (5), air exhaust device (6), clean flue gas pipe (7), Y type three way valve (11) and independent flue (2) of the multiunit that connects gradually, flue gas sampling device (1) the other end in place flue (2), a plurality of flue gas composition on-line monitoring units all are connected with flue gas analysis device (10) and control chip (12) through Y type three way valve (11). Compared with the prior art, the utility model discloses the structure is simplified, with low costs, detection efficiency is high, has solved the single-point measurement and has not representative problem, increases test result's stability simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the boiler thermal test and specifically relates to a unit combination formula flue gas composition on-line monitoring system is related to.
Background
In a boiler thermal test, flue gas component measurement is an important work, and directly influences the thermal efficiency of a boiler, the air leakage rate of an air preheater and the test result of an SCR flue gas denitration system. The precision of the existing flue gas analyzer completely meets the requirements of engineering styles, so that a flue gas sample becomes a key factor influencing a test result. In order to make the sampled flue gas sample representative, a full-section grid method is adopted in international and domestic standards.
Some test items (such as an ammonia spraying optimization adjustment test or a performance test of an SCR denitration system) require to obtain the distribution condition of a flue gas component concentration field on the cross section of a flue, the general test mode is that dozens of flue gas sampling measuring points are arranged on a measuring section according to a grid, a flue gas sampling pipe is arranged at each measuring point, a flue gas sampling pump is used for pumping the flue gas at the measuring point to a flue gas analysis device through the flue gas sampling pipes with the lengths of several meters, and the point-by-point measurement is carried out until all the measuring points are completely measured; when the measuring points are switched, the connection and disconnection operations of the sampling tube and the flue gas analysis device are carried out, so that the time for measuring one measuring point is several minutes, the time for measuring all measuring points of one section is several hours, when the test working conditions are more, the accumulated consumed time is even longer, the test working efficiency is very low, and the performance test and the progress of the adjustment test work are seriously influenced.
Some test items (such as air preheater air leakage test) require that the smoke of two flues is synchronously sampled at multiple measuring points, at the moment, two sets of instruments are needed, the smoke analysis device is expensive and large in size, and the field test is very inconvenient to carry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a unit combination formula flue gas composition on-line monitoring system that multi-pipeline that can effectively improve test work efficiency, shorten test time, effectively realize the flue gas switches sample and the synchronous sample of multiple measurement stations in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
The utility model provides a unit combination formula flue gas composition on-line monitoring system, includes flue gas analysis device, control chip and a plurality of flue gas composition on-line monitoring unit, each flue gas composition on-line monitoring unit respectively including the flue gas sampling device, flue gas flow straightener, mix buffer tank, flue gas preprocessor, air exhaust device, clean flue gas pipe and the Y type three way valve that connect gradually, flue gas sampling device one end in place in the flue, Y type three way valve include evacuation valve and flue gas analysis inlet valve, evacuation valve be connected with clean flue gas pipe, the Y type three way valve of each flue gas composition on-line monitoring unit all is connected with control chip, the flue gas analysis inlet valve of each Y type three way valve all is connected with flue gas analysis device.
Preferably, the flue gas sampling device include sealed dish and a plurality of sampling tube, the sampling tube pass sealed dish and go deep into the flue, sealed dish on be equipped with the sealed hole that is used for inserting the thermocouple, sealed downthehole edge be equipped with be used for with the sealed sealing washer of thermocouple.
Preferably, the flue gas flow equalizing device comprises a plurality of flue gas flow equalizing units, the adjacent flue gas flow equalizing units are connected with each other through a detachable joint to form a flue gas channel, one end of the flue gas channel is sealed, and the other end of the flue gas channel is an outlet.
Preferably, the connection structure among the flue gas sampling device, the flue gas flow equalizing device, the mixing buffer tank, the flue gas preprocessor, the air extractor, the flue gas analyzer and the Y-shaped three-way valve is a silicone tube.
Preferably, the Y-shaped three-way valve is made of all copper materials and is of an independent switch structure, a valve core switch of the Y-shaped three-way valve is a spherical switch, and joints are all pagoda heads.
Preferably, the material of the mixed buffer tank is transparent organic glass.
Compared with the prior art, the utility model has the advantages of it is following:
(1) The utility model discloses the structure is simplified, with low costs, under the prerequisite that does not increase flue gas analyzer, effectively shortens monitoring time, improves detection efficiency to can effectively realize switching sample and the synchronous sample of multiple measuring points to the multitube way of flue gas composition, solve the problem that single-point measurement does not have the representativeness.
(2) Because two paths of detection systems share one flue gas analysis device, the test uncertainty caused by adopting different measurement and analysis instruments is also reduced.
(3) A sampling tube of the flue gas sampling device penetrates through the sealing disc and goes deep into the flue, so that synchronous sampling of multi-point flue gas components and synchronous sampling of multi-point flue gas temperature can be realized simultaneously; the sealing disc is also provided with a sealing hole for inserting a thermocouple, and a sealing ring for sealing with the thermocouple is arranged on the inner edge of the sealing hole, so that the sealing performance is good.
(4) The flue gas flow straightener adopts unit combination formula design, and the equipment is convenient, easily carries, and simple structure is durable, adjusts in a flexible way, can reduce and connect required silicone tube between the unit, reduces the possibility of revealing and the work load that alleviates the system and look for leaks to through each unit integration together, be convenient for operate, maintain and in time discover the trouble, improve the experimental work efficiency of field personnel.
(5) The utility model provides a connecting pipe all adopts silica gel to make, high temperature resistant.
(6) The Y-shaped three-way valve is made of all copper materials, is integrally manufactured, is resistant to high temperature, high pressure and chemical corrosion, is controlled by an independent switch, adopts a spherical switch principle for a valve core, is tightly sealed, and is easy to open and close; the three-way joint is designed as a pagoda head, and is convenient to connect with a silicone tube.
(7) The material of the mixed buffer tank is transparent organic glass, and the mixed buffer tank has attractive appearance, is firm and durable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
Fig. 2 is a schematic structural diagram of a Y-shaped three-way valve.
Reference numerals:
1 is a flue gas sampling device; 2 is a flue; 3 is a flue gas flow equalizing device; 4 is a mixing buffer tank; 5, a smoke preprocessor; 6 is an air extractor; 7 is a clean flue gas pipe; 8 is an emptying valve; 9 is a flue gas analysis inlet valve; 10 is a flue gas analysis device; 11 is a Y-shaped three-way valve; 1-1, 1-2, 1-3, 2-1, 2-2, 2-3, 3-1, 3-2, 3-3, 4-1, 4-2, 4-3, 5-1, 5-2, 5-3, 6-1, 6-2, 6-3, 7-1, 7-2, 7-3, 8-1, 8-2 and 8-3 are smoke sampling measuring points; and 12 is a control chip.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
examples
The embodiment provides a unit combined type online smoke component monitoring system, as shown in fig. 1. The embodiment is realized by the following steps: A. the two paths of smoke component online monitoring units B respectively comprise a plurality of groups of smoke sampling devices 1, and the smoke sampling devices 1 of the A, B paths of smoke component online monitoring units correspond to each group. The flue gas sampling device 1 is arranged in a flue 2 according to a full-section grid method, each sampling tube of the flue gas sampling device 1 is connected with a corresponding flue gas flow equalizing device 3, and the flue gas flow equalizing devices 3 equalize and mix flue gas so as to realize uniform and consistent flue gas quantity of each sampling point. The flue gas of each flue gas component on-line monitoring unit is pumped out from the flue 2 through each sampling tube, and is sent into a mixing buffer tank 4 through a flue gas flow equalizing device 3; the mixing buffer tank 4 is connected with a smoke preprocessor 5 and an air extractor 6, and sends smoke into a clean smoke pipe 7; the flue gas analysis device 10 is respectively connected with the two clean flue gas pipes 7 through two Y-shaped three-way valves 11, and the two Y-shaped three-way valves 11 are both connected with the control chip 12. The Y-shaped three-way valve 11 is provided with two joints, namely an emptying valve 8 and a flue gas analysis inlet valve 9, which are shown in figure 2; the flue gas analysis inlet valve 9 is positioned between the clean flue gas pipe 7 and the flue gas analysis device 10, and 1-1, 1-2, 1-3, 2-1, 2-2, 2-3, 3-1, 3-2, 3-3, 4-1, 4-2, 4-3, 5-1, 5-2, 5-3, 6-1, 6-2, 6-3, 7-1, 7-2, 7-3, 8-1, 8-2 and 8-3 are flue gas sampling measuring points.
During detection and analysis, two working modes of multi-pipeline switching sampling and multi-point synchronous sampling can be adopted, and the control chip 12 controls the Y-shaped three-way valves 11 of the A-way and the B-way to be opened and closed, so that the connection between the smoke component online monitoring units of each way and the smoke analysis device 10 is controlled.
when the multi-pipeline switching sampling is adopted, the flue gas sampling device 1 of each group extracts the flue gas at one flue gas sampling measuring point to the mixing buffer tank 4, the plurality of sampling measuring points of each group sequentially extract the flue gas, the flue gas composition online monitoring unit of the A-pipeline performs the flue gas sampling monitoring analysis of one flue gas sampling measuring point, and the flue gas composition online monitoring unit of the B-pipeline performs the flue gas extraction and discharge of the corresponding flue gas sampling measuring point, so as to empty the clean flue gas pipe 7 and provide conditions for the flue gas monitoring of the B-pipeline. After the monitoring and analysis of the A path is finished, sampling, monitoring and analyzing the smoke of the smoke sampling and measuring points which are used for completing smoke extraction and emission of the B path, simultaneously, the A path performs smoke extraction and emission of the other smoke sampling and measuring points which are not detected, and the whole process alternately performs smoke sampling, monitoring and analysis and smoke extraction and emission on each smoke sampling and measuring point of the two paths of smoke component online monitoring units.
When the synchronous sampling of multiple measuring points is adopted, the flue gas at the sampling measuring points of a plurality of flue gas is regulated by each group of flue gas sampling devices 1 through the corresponding flue gas flow equalizing devices 3, the flow equalization and the coarse filtration of the flue gas are realized, and then the flue gas is sent into the mixing buffer tank 4. A. And B, extracting one path of smoke into the smoke analysis device 10 for detection and analysis, extracting the other path of smoke to a position close to the smoke analysis device 10 for emission, and alternately performing sampling detection and extraction emission on the two paths of smoke.
the smoke extraction and discharge of the smoke obtained from the sampling measuring point is to discharge the smoke into the atmosphere through an evacuation valve 8 on a Y-shaped three-way valve 11, and the smoke flow entering a smoke analysis device 10 can be roughly adjusted through a smoke analysis inlet valve 9.
A sampling tube of the flue gas sampling device 1 penetrates through the sealing disc to deeply penetrate into the flue 2, so that synchronous sampling of multi-point flue gas components and synchronous sampling of multi-point flue gas temperature can be realized simultaneously; the sealing disc is also provided with a sealing hole for inserting a thermocouple, and a sealing ring for sealing with the thermocouple is arranged on the inner edge of the sealing hole, so that the sealing performance is good.
The flue gas flow equalizing device 3 adopts unit combination type design, is convenient to assemble, easy to carry, simple in structure, firm and durable, flexible to adjust, can reduce the silicone tube required for connection between units, reduces the possibility of leakage and lightens the workload of system leakage detection, and is integrated together through each unit, convenient to operate, maintain and timely find faults, and improves the work efficiency of field personnel tests.
The utility model discloses well connecting pipe all adopts silica gel to make, high temperature resistant.
The Y-shaped three-way valve 11 is made of all copper materials, is integrally manufactured, is resistant to high temperature, high pressure and chemical corrosion, is controlled by an independent switch, is tightly sealed and is easily opened and closed because a valve core is a spherical switch; the three-way joint is designed as a pagoda head, and is convenient to connect with a silicone tube.
The mixed buffer tank 4 is made of transparent organic glass, and has attractive appearance, firmness and durability.
The smoke preprocessor 5 and the air extractor 6 use a complete set of equipment, and the air extraction flow is more than 10L/min.
The utility model has the advantages of simplified structure and low cost, effectively shortens the monitoring time, improves the detection efficiency, and can effectively realize the multi-pipeline switching sampling and multi-point synchronous sampling of the smoke components without adding a smoke analyzer, thereby solving the problem that the single-point measurement is not representative; because two paths of detection systems share one flue gas analysis device, the test uncertainty caused by adopting different measurement and analysis instruments is also reduced.
Claims (6)
1. The utility model provides a unit combination formula flue gas composition on-line monitoring system, a serial communication port, including flue gas analysis device (10), control chip (12) and a plurality of flue gas composition on-line monitoring unit, each flue gas composition on-line monitoring unit is respectively including flue gas sampling device (1), flue gas flow straightener (3), mixing buffer tank (4), flue gas preprocessor (5), air exhaust device (6), clean flue gas pipe (7) and Y type three way check valve (11) that connect gradually, flue gas sampling device (1) one end in place in flue (2), Y type three way check valve (11) including evacuation valve (8) and flue gas analysis inlet valve (9), evacuation valve (8) be connected with clean flue gas pipe (7), Y type three way check valve (11) of each flue gas composition on-line monitoring unit all are connected with control chip (12), flue gas analysis inlet valve (9) of each Y type three way check valve (11) all with flue gas analysis device (10) And (4) connecting.
2. The unit combined type online flue gas component monitoring system according to claim 1, wherein the flue gas sampling device (1) comprises a sealing disc and a plurality of sampling tubes, the sampling tubes penetrate through the sealing disc and go deep into the flue (2), the sealing disc is provided with a sealing hole for inserting a thermocouple, and a sealing ring for sealing with the thermocouple is arranged on the inner edge of the sealing hole.
3. the unit-combined online flue gas component monitoring system according to claim 1, wherein the flue gas flow equalizing device (3) comprises a plurality of flue gas flow equalizing units, adjacent flue gas flow equalizing units are connected with each other through detachable joints to form a flue gas channel, one end of the flue gas channel is closed, and the other end of the flue gas channel is an outlet.
4. The unit combined type online smoke composition monitoring system according to claim 1, wherein the connection structure among the smoke sampling device (1), the smoke flow equalizing device (3), the mixing buffer tank (4), the smoke preprocessor (5), the air extractor (6), the smoke analyzer (10) and the Y-shaped three-way valve (11) is a silicone tube.
5. The unit combined type online flue gas component monitoring system according to claim 1, wherein the Y-shaped three-way valve (11) is made of all copper and is of an independent switch structure, a valve core switch of the Y-shaped three-way valve (11) is a ball switch, and joints are all pagoda heads.
6. The unit-combined online smoke composition monitoring system according to claim 1, wherein the material of the mixing buffer tank (4) is transparent organic glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920265365.5U CN209783999U (en) | 2019-03-01 | 2019-03-01 | Unit combined type flue gas composition on-line monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920265365.5U CN209783999U (en) | 2019-03-01 | 2019-03-01 | Unit combined type flue gas composition on-line monitoring system |
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| CN209783999U true CN209783999U (en) | 2019-12-13 |
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| CN201920265365.5U Expired - Fee Related CN209783999U (en) | 2019-03-01 | 2019-03-01 | Unit combined type flue gas composition on-line monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121629A (en) * | 2020-08-07 | 2020-12-25 | 山东大学 | Segmented flow guide plate, flue gas on-line adjusting and flow equalizing device and flow equalizing method |
-
2019
- 2019-03-01 CN CN201920265365.5U patent/CN209783999U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112121629A (en) * | 2020-08-07 | 2020-12-25 | 山东大学 | Segmented flow guide plate, flue gas on-line adjusting and flow equalizing device and flow equalizing method |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |