CN212432687U

CN212432687U - Atmosphere TVOC standard exceeding alarm device applied to industrial plant

Info

Publication number: CN212432687U
Application number: CN202020764962.5U
Authority: CN
Inventors: 刘向美; 赵子进; 贾玉玲; 刘雄伟
Original assignee: Langfang Diyuan Environmental Protection Technology Co ltd
Current assignee: Langfang Diyuan Environmental Protection Technology Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-01-29
Anticipated expiration: 2030-05-11

Abstract

The utility model discloses an over standard alarm device of atmosphere TVOC applied to industrial factory, which comprises a chimney, a sampling head and a detection box, wherein the head end of the sampling head extends into and is fixed in the chimney, and the sampling head is connected with the waste gas inlet of the detection box through a sampling pipe; a flow limiting valve, a filter, an air flow sensor, a humidity sensor, a sampling pump, a PID sensor, a pulse valve, a back flushing pump and a humidity alarm are also arranged in the detection box; the utility model can automatically control the sampling gas flow to prevent the PID sensor from being damaged due to overlarge gas flow, and ensure the accuracy of the measured data; the automatic purging device has an automatic purging function, can perform cleaning work on the smoke dust in the sampling pipe, the sampling head, the sample gas pipe and the PID sensor, avoids the smoke dust concentration from being higher, and ensures that the measurement work is normally performed; the humidity of the sampled gas is monitored in real time, automatic alarm is given when the humidity is too high, a protection mechanism is started for a PID sensor, and the accuracy of measured data is guaranteed.

Description

Atmosphere TVOC standard exceeding alarm device applied to industrial plant

Technical Field

The utility model relates to an environmental protection field, concretely relates to be applied to atmosphere TVOC's of industrial factory alarm device that exceeds standard.

Background

Ambient air enters the PID sensor through the sampler, and the sensor transmits a measured value to the data processing module and performs corresponding conversion and storage; the display part displays all the measurement parameters; the data transmission module transmits all the measured values to the formulation platform; the problems of the existing equipment at present are as follows: the method comprises the following steps that 1, a debugging protection mechanism is lacked, so that an effective protection mechanism cannot be formed on parameters which are easy to damage PID sensors and cause measurement errors to gas flow, humidity and the like, the sensors are easy to damage, and the accuracy of measured values is influenced; 2. the dust-proof purging mechanism of the measuring equipment is lacked, and the normal measurement of the equipment cannot be ensured under the severe working condition that the smoke concentration is higher; 3. the gas inflow can not be automatically controlled, the gas inflow of the sample gas is generally controlled by a float flowmeter in the conventional sample gas collection, but the method can not be incorporated into an automatic control system to realize the adjustment of the gas inflow and the system protection function; 4. the air inlet humidity cannot be controlled, the existing equipment mainly removes water in sample air by means of allochroic silica gel, but due to different working conditions of various places, the maintenance and the replacement are not timely, the service life of a sensor is shortened, even the sensor is damaged, and therefore the problem of how to monitor the air inlet humidity is increased; 5. the cleaning gas with specified pressure can not enter the pipeline, and the purging of the particles attached in the pipeline is completed.

Aiming at the problems, the scheme provides the standard exceeding alarm device applied to the atmosphere TVOC of the industrial factory.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an out-of-standard alarm device for an atmospheric TVOC applied to an industrial factory floor.

According to the technical scheme provided by the embodiment of the utility model, the standard exceeding alarm device applied to the atmosphere TVOC of the industrial factory comprises a chimney, a sampling head and a detection box, wherein the head end of the sampling head extends into and is fixed in the chimney, and the sampling head is connected with the waste gas inlet of the detection box through a sampling pipe; the detection box is internally provided with a flow limiting valve, a filter, an air flow sensor, a humidity sensor, a sampling pump, a PID (proportion integration differentiation) sensor, a pulse valve, a back flushing pump and a humidity alarm; a waste gas outlet is formed in the wall of one side, far away from the sampling head, of the detection box, the waste gas inlet is connected with the waste gas outlet through a sample gas pipe, the waste gas inlet is taken as a left end point, and the flow limiting valve, the filter, the air flow sensor, the humidity sensor, the sampling pump and the PID sensor are sequentially mounted on the sample gas pipe from left to right; the humidity sensor is connected with the humidity alarm through a wire; the detection box is characterized in that a clean air inlet is further formed in the box wall of the detection box, a back-blowing gas pipe is arranged on the sample gas pipe, the right end of the back-blowing gas pipe is connected with the clean air inlet, and the back-blowing pump and the pulse valve are sequentially mounted on the back-blowing gas pipe from right to left.

The utility model discloses in, the left end node setting of blowback gas pipe is in the left side of restriction valve.

The utility model discloses in, exhaust outlet's outer end and exhaust pipe are connected.

The utility model discloses in, waste gas air inlet and exhaust outlet set up respectively on the tank wall of relative direction on the detection case.

The utility model discloses in, waste gas outlet sets up with clean air entry on the same side tank wall of detection case.

The utility model discloses in, the detection case is the square box of cavity form.

The utility model discloses in allochroic silica gel has been placed to the inside of filter.

To sum up, the utility model has the advantages that:

1. the sampling gas flow can be automatically controlled to prevent the PID sensor from being damaged due to overlarge gas flow, and the accuracy of measured data is guaranteed;

2. the automatic purging device has an automatic purging function, can perform cleaning work on the smoke dust in the sampling pipe, the sampling head, the sample gas pipe and the PID sensor, avoids the smoke dust concentration from being higher, and ensures that the measurement work is normally performed;

3. the humidity of the sampled gas is monitored in real time, automatic alarm is given when the humidity is too high, a protection mechanism is started for a PID sensor, and the accuracy of measured data is guaranteed.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a gas moving path diagram of the embodiment;

FIG. 3 is a gas moving path diagram according to the embodiment.

Reference numbers in the figures: 1. the device comprises a chimney, a sampling head, a detection box, a waste gas inlet, a flow limiting valve, a filter chamber, an air flow sensor, a humidity sensor, a sampling pump, a PID (proportion integration differentiation) sensor, a pulse valve, a back-flushing pump, a humidity alarm, a waste gas outlet, a clean air inlet and a clean air outlet, wherein the sampling head is 2, the detection box is 3, the waste gas inlet is 4, the flow limiting valve is 5, the filter chamber is 6, the air flow sensor is 7, the humidity sensor.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1, an overproof alarm device for atmospheric TVOC applied to an industrial plant area includes a chimney 1, a sampling head 2 and a detection box 3, wherein a head end of the sampling head 2 extends into and is fixed inside the chimney 1, and the sampling head 2 is connected with a waste gas inlet 4 of the detection box 3 through a sampling pipe; the detection box 3 is a cavity-shaped square box body; the detection box 3 is also internally provided with a flow limiting valve 5, a filter 6, an air flow sensor 7, a humidity sensor 8, a sampling pump 9, a PID sensor 10, a pulse valve 11, a back flushing pump 12 and a humidity alarm 13; a waste gas outlet 14 is formed in the wall of the detection box 3 on the side far away from the sampling head 2, the waste gas inlet 4 is connected with the waste gas outlet 14 through a sample gas pipe, the waste gas inlet 4 is used as a left end point, and the flow limiting valve 5, the filter 6, the air flow sensor 7, the humidity sensor 8, the sampling pump 9 and the PID sensor 10 are sequentially installed on the sample gas pipe from left to right; the humidity sensor 8 is connected with the humidity alarm 13 through a lead; the wall of the detection box 3 is also provided with a clean air inlet 15, the sample gas pipe is respectively provided with a back-blowing gas pipe, the right end of the back-blowing gas pipe is connected with the clean air inlet 15, and the back-blowing gas pipe is sequentially provided with the back-blowing pump 12 and the pulse valve 11 from right to left.

As shown in fig. 1, the left end node of the blowback gas pipe is disposed on the left side of the flow restriction valve 5.

As shown in fig. 1, the exhaust gas inlet 4 and the exhaust gas outlet 14 are respectively arranged on the opposite walls of the detection box 3; the exhaust gas outlet 14 and the clean air inlet 15 are opened in the same side wall of the detection chamber 3.

In this device, the outer end and the exhaust pipe of exhaust gas outlet 14 are connected, and waste gas can be discharged through handling again, avoids causing the pollution to the environment.

In this device, the allochroic silica gel is placed in the filter 6, and the silica gel changes its color according to the amount of absorbed water.

Example (b):

the measuring process of the device is as follows: referring to fig. 2, the direction of the arrow in fig. 2 is the moving path of the sample gas; waste gas in the chimney 1 passes through the sampling head 2 and then enters the sample gas pipe from the waste gas inlet 4 of the detection box 3 through the sampling pipe, then passes through the flow limiting valve 5 (at the moment, the pulse valve 11 is closed) and the filter 6, passes through the air flow sensor 7, the opening degree of the flow limiting valve 5 is adjusted according to the display numerical value of the air flow sensor 7 until the sample gas flow meets the equipment requirement, then the sample gas enters the probe of the humidity sensor 8, finally enters the interior of the PID sensor 10 through the sampling pump 9, the TVOC of the sample gas is measured by the PID sensor 10, and the waste gas is discharged through the waste gas outlet 14 after measurement.

The back-blowing cleaning process of the device is as follows: referring to fig. 3, the direction of the arrow in fig. 3 is the moving path of the clean air; clean air enters through a clean air inlet 15, a back-blowing pump 12 and a pulse valve 11 on a back-blowing pipe reach set pressure and then enter a back-blowing pipeline, and the clean air can enter a sampling pipe to blow and sweep the sampling pipe and a sampling head; meanwhile, clean air can also enter the PID sensor 10 after passing through the flow limiting valve 5, the filter 6, the air flow sensor 7, the humidity sensor 8 and the sampling pump 9, the PID sensor 10 is purged, and the purged air is discharged through the waste gas outlet 14.

The protection process of the device is as follows: the device opens the flow limiting valve 5 to a smaller opening degree after sampling, the sampling pump 9 starts to work, the air flow sensor 7 detects the air inlet flow at the moment, the opening degree of the flow limiting valve 5 is adjusted according to the detected air inlet flow, when the exhaust gas quantity in the chimney 1 rises and positive pressure purging is generated, the pressure air inlet flow rises, the opening degree of the flow limiting valve 5 is reduced at the moment, and the air inlet quantity is limited; when the allochroic silica gel in the filter 6 absorbs moisture and is saturated, the humidity of the sample gas is over high, the humidity alarm 13 gives an alarm, the sampling work stops after the alarm, the sample gas enters the maintenance work after the sampling work stops, after the allochroic silica gel in the filter 6 is replaced, the humidity sensor 8 is opened to normally purge, clear and alarm, and the normal measurement work is recovered.

The foregoing description is only exemplary of the preferred embodiments of the invention and is provided for the purpose of illustrating the general principles of the invention. Meanwhile, the scope of the present invention is not limited to the specific combinations of the above-described technical features, and other technical features or equivalent features may be combined arbitrarily without departing from the scope of the present invention. For example, the above features and (but not limited to) technical features having similar functions disclosed in the present invention are mutually replaced to form the technical solution.

Claims

1. The standard exceeding alarm device applied to the atmosphere TVOC of the industrial factory area comprises a chimney (1), a sampling head (2) and a detection box (3), wherein the head end of the sampling head (2) extends into and is fixed in the chimney (1), and the sampling head (2) is connected with a waste gas inlet (4) of the detection box (3) through a sampling pipe; the method is characterized in that: a flow limiting valve (5), a filter (6), an air flow sensor (7), a humidity sensor (8), a sampling pump (9), a PID (proportion integration differentiation) sensor (10), a pulse valve (11), a back flushing pump (12) and a humidity alarm (13) are also arranged in the detection box (3); a waste gas outlet (14) is formed in the wall of one side, far away from the sampling head (2), of the detection box (3), the waste gas inlet (4) is connected with the waste gas outlet (14) through a sample gas pipe, the waste gas inlet (4) is taken as a left end point, and the flow limiting valve (5), the filter (6), the air flow sensor (7), the humidity sensor (8), the sampling pump (9) and the PID sensor (10) are sequentially installed on the sample gas pipe from left to right; the humidity sensor (8) is connected with the humidity alarm (13) through a lead; the detection box is characterized in that a clean air inlet (15) is further formed in the box wall of the detection box (3), a back-blowing gas pipe is arranged on the sample gas pipe in a divided mode, the right end of the back-blowing gas pipe is connected with the clean air inlet (15), and the back-blowing gas pipe is sequentially provided with the back-blowing pump (12) and the pulse valve (11) from right to left.

2. The overproof alarm device of atmospheric TVOC applied to industrial factory floor as claimed in claim 1 wherein: the left end node of the back blowing gas pipe is arranged on the left side of the flow limiting valve (5).

3. The overproof alarm device of atmospheric TVOC applied to industrial factory floor as claimed in claim 1 wherein: the outer end of the waste gas outlet (14) is connected with a waste discharge pipeline.

4. The overproof alarm device of atmospheric TVOC applied to industrial factory floor as claimed in claim 1 wherein: the waste gas inlet (4) and the waste gas outlet (14) are respectively arranged on the opposite direction box walls of the detection box (3).

5. The overproof alarm device of atmospheric TVOC applied to industrial factory floor as claimed in claim 1 wherein: the waste gas outlet (14) and the clean air inlet (15) are arranged on the same side wall of the detection box (3).

6. The overproof alarm device of atmospheric TVOC applied to industrial factory floor as claimed in claim 1 wherein: the detection box (3) is a cavity-shaped square box body.

7. The overproof alarm device of atmospheric TVOC applied to industrial factory floor as claimed in claim 1 wherein: allochroic silica gel is placed in the filter (6).