CN209911067U - High-humidity exhaust gas online detection device - Google Patents

Abstract

The application discloses a high-humidity waste gas online detection device which comprises a filter, a dryer, a mixer, an air suction pump, a detector and a first external connecting pipe; the air inlet of the filter is used for receiving high-humidity waste gas, the air inlet of the dryer is connected with the air outlet of the filter through a pipeline, the mixer is provided with two air inlets and one air outlet, the two air inlets of the mixer are respectively connected with the air outlet of the dryer and the first external connecting pipe, the air outlet of the mixer is directly or indirectly connected with the air inlet of the air pump, and the air outlet of the air pump is connected with the air inlet of the detector; the first external connecting pipe is a channel for external fresh air to enter the mixer.

Description

High-humidity exhaust gas online detection device

technical field

The utility model relates to the field of gas deodorization, in particular to an on-line detection device for high-humidity waste gas.

Background technique

With the development of social economy and the rapid increase of population, the atmospheric environment of the earth is deteriorating day by day. In recent years, the discharge of some harmful gases, especially the odor emitted by some odorous gases, has caused people's dissatisfaction. The original air pollution prevention and control work has been far from meeting people's requirements, and odor control has gradually attracted people's attention. Odor is a sensory hazard, which has become one of the seven environmental hazards in the world. There are more than 400,000 to 500,000 kinds of malodorous substances, of which the main components are sulfide-containing, nitrogen-containing, oxide-containing, halogen derivatives and various hydrocarbons. Two, second only to noise.

In recent years, due to the continuous development of urban construction and the reduction of land resources, the location of urban sewage treatment plants is getting closer and closer to residential areas. In the sewage treatment plant, from the pretreatment device to the biochemical treatment device, each unit of sewage treatment produces odor, and the main odor-causing components are sulfur-containing compounds, such as hydrogen sulfide and methyl mercaptan. Odor pollution control has become an important part that cannot be ignored in the design of sewage and sludge treatment projects.

In the odor control process, an important link is the online gas detector. In the deodorization process, we need to know the real-time removal effect of the deodorization process on the malodorous gas, so it is necessary to use an online detector to detect the gas. However, the humidity of the gas is often relatively high, and the online detector is prone to malfunction in a high-humidity environment and cannot be monitored normally, which greatly affects our understanding and grasp of the effect of the deodorization process.

Utility model content

Aiming at the above problems, the utility model proposes an on-line detection device for high-humidity waste gas.

The technical scheme adopted by the utility model is as follows:

An on-line detection device for high-humidity waste gas, comprising a filter, a dryer, a mixer, an air pump, a detector and a first external pipe; the air inlet of the filter is used to receive the high-humidity waste gas, and the air intake of the dryer The port is connected with the air outlet of the filter through a pipeline, the mixer is provided with two air inlets and an air outlet, and the two air inlets of the mixer are respectively connected with the air outlet of the dryer and the first external pipe. The air outlet of the mixer is directly or indirectly connected with the air inlet of the air suction pump, and the air outlet of the air suction pump is connected with the air inlet of the detector; the first external pipe is for the fresh air from the outside to enter the mixer channel.

The working principle of this device is as follows. First, the high-humidity exhaust gas enters the filter to filter out dust substances, then enters the dryer to remove moisture, and then mixes with fresh air in the mixer and is pumped into the detector by the air pump. Discharge after testing.

The device directly filters the dust and moisture in the high-humidity exhaust gas through the pretreatment of the filter and the dryer, without affecting the detector, and the detection is more convenient.

Optionally, it also includes a three-way switch and a second external pipe, the two ports of the three-way switch are respectively connected with the air outlet of the air pump and the mixer, and the second external pipe is installed on the third of the three-way switch. On the port, the second external pipe is for fresh air.

When the detection of high-humidity gas is completed, the three-way switch closes the conduction with the mixer, and then turns on the conduction between the three-way switch and the second external pipe, and the conduction between the three-way switch and the suction pump, so that the fresh air is discharged. The air pump is pumped into the detector, and fresh air can clean the detector, which has a good cleaning and detection effect on the detector. It should be noted that there is always continuity between the three-way switch and the air pump, no matter whether the device is in the test gas state or the cleaning state, when the test is in the state, the three-way switch and the second external pipe are not connected.

Optionally, a flow meter is provided on the first outer pipe.

The flowmeter is used to detect and adjust the amount of fresh air entering the mixer through the first external pipe. After the dust and dehumidification gas is mixed with the fresh air, the sulfide, nitrogen and oxygen in the mixed gas will be mixed. In this way, it can be ensured that the concentration of these gases will not exceed the detection range of the detector. At the same time, because a flow meter is installed on the first outer pipe, the amount of fresh air entering the mixer can be accurately known.

The filters in this case include, but are not limited to, plate filters, pleated filters, bag filters, frame filters, combined filters, and the like. The filter 1 is also detachable, which is convenient for cleaning, replacement and maintenance.

Dryers include but are not limited to atmospheric pressure dryers, vacuum dryers, convection dryers, conduction dryers, radiation dryers, dielectric dryers, etc. The dryer 2 is also detachable for easy cleaning and replacement repair.

The flow meter can adjust the amount of fresh air in the first outer pipe according to the needs, so as to mix with the detection gas in different proportions to adapt to the detection gas of different concentrations, and protect the detector from exceeding the detection range.

The suction volume of the suction pump is generally fixed, and can be replaced with an adjustable suction pump if necessary.

Detectors include but are not limited to electrochemical detectors, infrared detectors, ultraviolet detectors, FID detectors, PID detectors, etc.

Flow meters include, but are not limited to, mass flow meters, rotor flow meters, electromagnetic flow meters, differential pressure flow meters, and the like.

The beneficial effects of the utility model are: through the pretreatment of the filter and the dryer, the dust and moisture in the high-humidity waste gas can be directly filtered out without affecting the detector, and the detection is more convenient.

Description of drawings:

Figure 1 is a schematic diagram of the structure of the high-humidity exhaust gas online detection device.

The reference signs in the figure are: 1, filter, 2, dryer, 3, mixer, 4, three-way switch, 5, air pump, 6, gas detector, 7, flow meter, 801, first external Take over, 802, the second external take over.

Detailed ways:

The present utility model will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, an on-line detection device for high-humidity waste gas includes a filter 1, a dryer 2, a mixer 3, an air pump 5, a detector 6 and a first external pipe 801; The air port is used to receive high-humidity waste gas. The air inlet of the dryer 2 is connected to the air outlet of the filter 1 through a pipeline. The mixer 3 is provided with two air inlets and one air outlet. The two air inlets are respectively connected with the air outlet of the dryer 2 and the first external pipe 801, the air outlet of the mixer 3 is directly or indirectly connected with the air inlet of the air extraction pump 5, and the air outlet of the air extraction pump 5 is connected directly or indirectly. It is connected with the air inlet of the detector 6 ; the first external pipe 801 is a channel for the fresh air from the outside to enter the mixer 3 .

The working principle of the device is as follows. First, the high-humidity exhaust gas enters the filter 1 to filter out dust substances, then enters the dryer 2 to remove moisture, and then mixes with fresh air in the mixer 3 and is pumped into the detector 6 by the air pump 5 , the detector 6 detects the gas and then discharges it.

The device directly filters the dust and moisture in the high-humidity exhaust gas through the pretreatment of the filter 1 and the dryer 2, without affecting the detector 6, and the detection is more convenient.

As shown in FIG. 1, it also includes a three-way switch 4 and a second external pipe 802. The two ports of the three-way switch 4 are respectively connected with the air outlet of the air pump 5 and the mixer 3. The second external pipe 802 Installed on the third port of the three-way switch 4, the second external pipe 802 is fresh air.

When the detection of the high-humidity gas is completed, the three-way switch 4 closes the conduction with the mixer 3 , and then opens the conduction between the three-way switch 4 and the second external pipe 802 and the conduction between the three-way switch 4 and the air pump 5 , so that the fresh air is pumped into the detector 6 by the air pump 5 , and the fresh air can clean the detector 6 , which has a good cleaning and detection effect on the detector 6 . It should be noted that there is always continuity between the three-way switch 4 and the air pump 5, no matter whether the device is in the test gas state or the cleaning state, when the test state is in the test state, there is no connection between the three-way switch 4 and the second external pipe 802. Conductive.

As shown in FIG. 1 , the first outer pipe 801 is provided with a flow meter 7 .

The flow meter 7 is used to detect and adjust the amount of fresh air entering the mixer 3 through the first external pipe 801. After the dedusted and dehumidified gas is mixed with the fresh air, it will make the sulfide and nitrogen-containing compounds in the mixed gas , oxides, halogen derivatives and various hydrocarbons are reduced in proportion, so that it can be ensured that the concentration of these gases will not exceed the detection range of the detector 6 . At the same time, because the flow meter 7 is installed on the first outer pipe 801 , the amount of fresh air entering the mixer 3 can be accurately known.

The filter 1 in this case includes, but is not limited to, a plate filter 1, a pleated filter 1, a bag filter 1, a frame filter 1, a combined filter 1, and the like. The filter 1 is also detachable, which is convenient for cleaning, replacement and maintenance.

The dryer 2 includes, but is not limited to, an atmospheric dryer 2, a vacuum dryer 2, a convection dryer 2, a conduction dryer 2, a radiation dryer 2, a dielectric dryer 2, etc. Detachable, easy to clean, replace and maintain.

The flow meter 7 can adjust the amount of fresh air in the first external pipe 801 as required, so as to be mixed with the detection gas in different proportions to adapt to the detection gas of different concentrations, and protect the detector 6 from exceeding the detection range.

The air extraction volume of the air extraction pump 5 is generally fixed, and can be replaced with an air extraction pump 5 of an adjustable air extraction volume if necessary.

The detector 6 includes, but is not limited to, an electrochemical detector 6 , an infrared detector 6 , an ultraviolet detector 6 , an FID detector 6 , a PID detector 6 and the like.

The flow meters 7 include, but are not limited to, mass flow meters 7 , rotameters 7 , electromagnetic flow meters 7 , differential pressure flow meters 7 and the like.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the contents of the description and accompanying drawings of the present invention is directly or indirectly applied to other related The technical field is similarly included in the protection scope of the present invention.

Claims (3)

1. a high-humidity waste gas on-line detection device, is characterized in that, comprises filter, dryer, mixer, air pump, detector and first external pipe; The air inlet of described filter is used for receiving high-humidity waste gas , the air inlet of the dryer is connected with the air outlet of the filter through the pipeline, the mixer is provided with two air inlets and one air outlet, and the two air inlets of the mixer are respectively connected with the air outlet of the dryer It is connected with the first external pipe, the air outlet of the mixer is directly or indirectly connected with the air inlet of the air pump, and the air outlet of the air pump is connected with the air inlet of the detector; the first external pipe is The passage of outside fresh air into the mixer. 2. The high-humidity exhaust gas on-line detection device according to claim 1, characterized in that it further comprises a three-way switch and a second external pipe, and the two ports of the three-way switch are respectively connected with the air outlet of the air extraction pump and the mixer. Connected, the second external pipe is installed on the third port of the three-way switch, and the second external pipe is fresh air. 3 . The high-humidity exhaust gas online detection device according to claim 1 , wherein a flow meter is provided on the first outer pipe. 4 .

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