CN209878712U

CN209878712U - Novel constant speed flue gas sampling detects device

Info

Publication number: CN209878712U
Application number: CN201920405474.2U
Authority: CN
Inventors: 张玉磊; 孙继波; 王棋
Original assignee: Shandong Guohuan Lihong Testing Co Ltd
Current assignee: Shandong Guohuan Lihong Testing Co Ltd
Priority date: 2019-03-28
Filing date: 2019-03-28
Publication date: 2019-12-31
Anticipated expiration: 2029-03-28

Abstract

The utility model discloses a novel constant speed flue gas sampling detection device, which comprises a detection device and a gas collection device, wherein the detection device comprises an outer shell, the gas collection device comprises a gas guide rod, the right end of the upper surface of the outer shell is provided with a cylindrical shell, the inside of the cylindrical shell is provided with a flue gas detection device, the upper end surface of the cylindrical shell is provided with a conical shell, the inner side surface of the conical shell is provided with a three-way pipe, the air inlet of the three-way pipe passes through the conical shell, the first air outlet of the three-way pipe is connected with the inner side surface of the cylindrical shell through a second flow guide pipe, the second flow guide pipe is provided with a second electromagnetic valve, the inside of the outer shell is provided with an air suction pump, a filter box, a lithium battery pack and a single chip microcomputer, the novel constant speed flue gas sampling detection device has compact structure and, the sealing cover plate is convenient to maintain, and the smoke can be cooled and filtered through the iron wire filter screen.

Description

Novel constant speed flue gas sampling detects device

Technical Field

The utility model relates to an environmental monitoring equipment technical field specifically is a novel constant speed flue gas sampling detects device.

Background

In recent years, with the continuous development of economy, the haze problem becomes more serious, and the high social attention is attracted. The increase of PM2.5 particles in the air is the main reason of haze formation. PM2.5 particles emitted by a fixed pollution source are an important source of air PM2.5, and how to reasonably monitor PM2.5 in exhaust gas of the fixed pollution source has great significance for establishing control measures and emission standards of PM2.5 pollution. At present, no sampling method for PM2.5 particulate matters is available, and only a sampling method for total particulate matters is available.

At present, relevant standards for the particulate matter in the exhaust gas of a fixed pollution source for the detection of gaseous pollutants are GB/T16157-1996, HJ/T76-2007 and the like. The above standards all suggest that sampling of particulate and gaseous pollutants in the exhaust of stationary pollution sources should follow the principle of isokinetic sampling. The principle of constant-speed sampling is as follows: the particulate matters have certain mass, and can not change direction along with the airflow completely due to the inertia effect of the self motion in the flue, so that constant-speed sampling is needed to obtain a representative smoke dust sample from the flue, namely the flow rate of the smoke dust is equal to the sampling speed. The specification of ' HJ/T76-2007 ' technical requirements and detection methods of fixed pollution source continuous monitoring systems ': "when the flow rate is more than 10m/s, the relative error of the speed is not more than +/-10%; when the flow velocity is less than or equal to 10m/s, the relative error of the velocity does not exceed +/-12% ".

The flue gas of different velocity of flow is sampled, and the flue gas sampling mouth is placed in the middle of the air current main part, and the sampling mouth keeps little negative pressure state. When the flow rate of flue gas is greater than the sampling speed, the partial gas flow that goes to the inner edge of the sampling port and the small particles carried by the partial gas flow can change the flow direction and do not enter the sampling nozzle, and some large particles carried by the partial gas flow can continue to advance according to the original direction under the larger inertia due to the larger mass, so that the sampling concentration of the large particles entering the sampling nozzle is higher than the real concentration of a main body. When the flow rate of the flue gas is lower than the sampling speed, a part of the airflow which travels to the outer edge of the sampling port and small particles carried by the airflow are sucked into the sampling nozzle, and a part of large particles carried by the airflow cannot enter the sampling nozzle along with the airflow with the changed direction under the condition of larger inertia due to larger mass, so that the sampling concentration of the large particles is lower than the real concentration. When the speed of the air flow main body is equal to the sampling speed, the air flow traveling to the edge of the sampling port cannot change the flow direction, and the particles carried by the air flow main body cannot change the movement direction, so that the sampling concentration is equal to the real concentration. When the existing flue gas sampling detection device samples flue gas, the sampling data is often not accurate enough due to the fact that local fluctuation possibly occurs in the flow velocity of the flue gas. Sampling hole on the chimney is that the enterprise opens by oneself in the actual operation in-process, therefore the sampling point of chimney mostly all is located the eminence, and current flue gas sampling detection device mostly relies on ground testing platform to carry out the flue gas and detects, and when the flue gas conveyed detection device from the sampling point, because the pipe is too long often can lead to the dust that carries in the flue gas to gather in the inside of pipe to the influence detects the precision.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a novel constant speed flue gas sampling detection device, can high efficiency carry out the sampling detection to the flue gas, the use of administering for the environment has brought the facility, can bear it in addition and detect near the sampling hole, further promoted the utility model discloses an availability factor can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a novel constant-speed flue gas sampling and detecting device comprises a detecting device and a gas collecting device, wherein the detecting device comprises an outer shell, the gas collecting device comprises a gas guide rod, the right end of the upper surface of the outer shell is provided with a cylindrical shell, the inside of the cylindrical shell is provided with a flue gas detecting device, the upper end surface of the cylindrical shell is provided with a conical shell, the inner side surface of the conical shell is provided with a three-way pipe, the air inlet of the three-way pipe penetrates through the conical shell, the first air outlet of the three-way pipe is connected with the inner side surface of the cylindrical shell through a second flow guide pipe, the second flow guide pipe is provided with a second electromagnetic valve, the inside of the outer shell is provided with an air extracting pump, a filter box, a lithium battery pack and a single chip microcomputer, the inside of the filter box is provided with an iron wire filter screen, the inner side surface of the cylindrical shell, be equipped with first solenoid valve on the first honeycomb duct, the air inlet of aspiration pump passes through the pipe and links to each other with the left end face of rose box, and the trailing flank of shell body is equipped with the baffle, and both ends are equipped with the braces that two bilateral symmetry set up about the trailing flank of baffle, the right-hand member face of air guide rod is equipped with the connector, and the left end face of air guide rod is equipped with the gas collecting channel, and the lateral surface and the medial surface of gas collecting channel are equipped with first baroceptor and second baroceptor respectively, and the input of singlechip is connected with the output electricity of lithium cell group, and the output of singlechip is connected with the input electricity of first solenoid valve, second solenoid valve and aspiration pump, singlechip and first baroceptor and.

As a preferred technical scheme of the utility model, the leading flank of shell body is equipped with maintenance window, and the one end that the leading flank of shell body is close to maintenance window is equipped with sealed apron.

As an optimal technical scheme of the utility model, the upper surface left end of shell body is equipped with the pipe of discharging fume, and the gas outlet of aspiration pump passes through the pipe and links to each other with the air inlet of discharging fume the pipe.

As a preferred technical scheme of the utility model, the lateral surface right-hand member of air guide rod has cup jointed thermal-insulated handle, and one side that the lateral surface of thermal-insulated handle is close to the connector is equipped with the handle.

As an optimized technical scheme of the utility model, the up end sealing connection of toper casing has the upper cover plate.

Compared with the prior art, the beneficial effects of the utility model are that: this novel constant speed flue gas sampling detection device, compact structure, convenient operation can be very convenient carry out the sample detection to the flue gas fast, and the setting of braces has made things convenient for carrying, and the setting of sealed apron has made things convenient for the maintenance of equipment, can cool down and filter the flue gas through the iron wire filter screen.

Drawings

FIG. 1 is a schematic structural diagram of a detection device;

FIG. 2 is a cross-sectional view of a detection device;

fig. 3 is a schematic structural view of a gas collecting device.

In the figure: the device comprises an outer shell 1, a smoke exhaust pipe 2, a sealing cover plate 3, a cylindrical shell 4, a conical shell 5, an upper cover plate 6, a first flow guide pipe 7, a partition plate 8, a 9-strap, a single chip microcomputer 10, a first electromagnetic valve 11, a three-way pipe 12, a lithium battery pack 13, a second electromagnetic valve 14, a second flow guide pipe 15, an air guide rod 16, a smoke detection device 17, a third flow guide pipe 18, a filter box 19, an iron wire filter screen 20, a handle 21, a connector 22, a suction pump 23, a first air pressure sensor 24, a second air pressure sensor 25 and a gas collection hood 26.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a novel constant-speed flue gas sampling and detecting device comprises a detecting device and a gas collecting device, wherein the detecting device comprises an outer shell 1, a maintenance window is arranged on the front side surface of the outer shell 1, a sealing cover plate 3 is arranged at one end, close to the maintenance window, of the front side surface of the outer shell 1, the arrangement of the sealing cover plate 3 facilitates the maintenance of equipment, the gas collecting device comprises a gas guide rod 16, a cylindrical shell 4 is arranged at the right end of the upper surface of the outer shell 1, a flue gas detecting device 17 is arranged inside the cylindrical shell 4, a conical shell 5 is arranged on the upper end surface of the cylindrical shell 4, the upper end surface of the conical shell 5 is connected with an upper cover plate 6 in a sealing manner, a three-way pipe 12 is arranged on the inner side surface of the conical shell 5, an air inlet of the three-way pipe 12 penetrates through the conical shell 5, a first air outlet of the three, an air suction pump 23, a filter box 19, a lithium battery pack 13 and a single chip microcomputer 10 are arranged inside an outer shell 1, an iron wire filter screen 20 is arranged inside the filter box 19, the smoke can be cooled and filtered through the iron wire filter screen 20, the inner side surface of a cylindrical shell 4 is connected with the right end surface of the filter box 19 through a third guide pipe 18, a second air outlet of a three-way pipe 12 is connected with the upper surface of the filter box 19 through a first guide pipe 7, a first electromagnetic valve 11 is arranged on the first guide pipe 7, an air inlet of the air suction pump 23 is connected with the left end surface of the filter box 19 through a guide pipe, a smoke exhaust pipe 2 is arranged at the left end of the upper surface of the outer shell 1, an air outlet of the air suction pump 23 is connected with an air inlet of the smoke exhaust pipe 2 through a guide pipe, a partition plate 8 is arranged on the rear side surface of the outer shell 1, two left, the right-hand member face of air guide bar 16 is equipped with connector 22, the lateral surface right-hand member of air guide bar 16 has cup jointed thermal-insulated handle, one side that thermal-insulated handle's lateral surface is close to connector 22 is equipped with handle 21, the left end face of air guide bar 16 is equipped with gas collecting channel 26, gas collecting channel 26's lateral surface is equipped with first baroceptor 24 and second baroceptor 25 respectively with the medial surface, singlechip 10's input is connected with the output electricity of lithium cell group 13, singlechip 10's output and first solenoid valve 11, second solenoid valve 14 and aspiration pump 23's input electricity are connected, singlechip 10 and first baroceptor 24 and second baroceptor 25 both way junction, this novel flue gas sampling detection device, compact structure, and convenient operation, can be very convenient carry out sampling detection to the flue gas fast.

When in use: the operation workman will through braces 9 the utility model discloses bear the sampling point of flue gas pipeline, it is continuous with connector 22 with the air inlet of pipe with three-way pipe 12, send into the inside of chimney with gas collecting channel 26 through the sample connection that sets up at the chimney sampling point, first solenoid valve 11 opens from this time, second solenoid valve 14 closes, take the flue gas out by singlechip 10 control aspiration pump 23, detect the inside and outside pressure differential of gas collecting channel 26 simultaneously by setting up first baroceptor 24 and second baroceptor 25 on gas collecting channel 26, when the inside and outside pressure differential of gas collecting channel 26 is the same, singlechip 10 controls first solenoid valve 11 and closes, second solenoid valve 14 opens, the flue gas enters into among the gas detection device 17, detect the flue gas by gas detection device 17.

The utility model can be operated conveniently, occupies little space when in use, and is convenient for operation and use; the smoke can be accurately sampled and detected, and the use convenience is improved; the braces 9 are arranged to facilitate the carrying of the utility model, and the use convenience is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel constant velocity flue gas sampling detection device, includes detection device and gas collection system, and detection device includes shell body (1), and gas collection system includes air guide rod (16), its characterized in that: the right end of the upper surface of the outer shell (1) is provided with a cylindrical shell (4), a smoke detection device (17) is arranged inside the cylindrical shell (4), the upper end surface of the cylindrical shell (4) is provided with a conical shell (5), the inner side surface of the conical shell (5) is provided with a three-way pipe (12), an air inlet of the three-way pipe (12) penetrates through the conical shell (5) to be arranged, a first air outlet of the three-way pipe (12) is connected with the inner side surface of the cylindrical shell (4) through a second guide pipe (15), the second guide pipe (15) is provided with a second electromagnetic valve (14), the outer shell (1) is internally provided with an air suction pump (23), a filter box (19), a lithium battery pack (13) and a single chip microcomputer (10), the inner part of the filter box (19) is provided with an iron wire filter screen (20), the inner side surface of the cylindrical shell (4), a second air outlet of the three-way pipe (12) is connected with the upper surface of the filter box (19) through a first guide pipe (7), a first electromagnetic valve (11) is arranged on the first guide pipe (7), an air inlet of the air pump (23) is connected with the left end surface of the filter box (19) through a guide pipe, a partition plate (8) is arranged on the rear side surface of the outer shell (1), two bilaterally symmetrically arranged braces (9) are arranged at the left end and the right end of the rear side surface of the partition plate (8), a connector (22) is arranged on the right end surface of the air guide rod (16), a gas collecting hood (26) is arranged on the left end surface of the air guide rod (16), a first air pressure sensor (24) and a second air pressure sensor (25) are respectively arranged on the outer side surface and the inner side surface of the gas collecting hood (26), the input end of the single chip microcomputer (10) is electrically connected with the output end, The second electromagnetic valve (14) is electrically connected with the input end of the air pump (23), and the singlechip (10) is bidirectionally connected with the first air pressure sensor (24) and the second air pressure sensor (25).

2. The novel constant velocity flue gas sampling and detecting device of claim 1, characterized in that: the front side of the outer shell (1) is provided with a maintenance window, and one end, close to the maintenance window, of the front side of the outer shell (1) is provided with a sealing cover plate (3).

3. The novel constant velocity flue gas sampling and detecting device of claim 1, characterized in that: the left end of the upper surface of the outer shell (1) is provided with a smoke exhaust pipe (2), and an air outlet of the air pump (23) is connected with an air inlet of the smoke exhaust pipe (2) through a guide pipe.

4. The novel constant velocity flue gas sampling and detecting device of claim 1, characterized in that: the right end of the outer side surface of the air guide rod (16) is sleeved with a heat insulation handle, and one side, close to the connector (22), of the outer side surface of the heat insulation handle is provided with a handle (21).

5. The novel constant velocity flue gas sampling and detecting device of claim 1, characterized in that: the upper end face of the conical shell (5) is connected with an upper cover plate (6) in a sealing mode.