Online flue gas sampling and filtering device with electrostatic dust collection function

Abstract

The utility model discloses a flue gas on-line sampling and filtering device with electrostatic precipitation, which belongs to the technical field of flue gas sampling and filtering, and comprises a probe, a probe rod, a flange and a filter element, the probe is fixedly connected with the flange and is assembled outside a chimney along with the flange, the end part of the probe rod is assembled on the flange and is communicated with the probe, and the filter element is connected with the probe. One end of the probe rod extends into the chimney, the other end of the probe rod extends into the chimney, an air inlet is formed in the end, located on one side in the chimney, of the probe rod, electrodes are arranged in the probe rod, the upper end of the probe rod is a positive electrode, and the lower end of the probe rod is a negative electrode, so that an electrostatic field is formed on the pipe wall of the probe rod; the filter element is arranged in the probe, a sampling pipe communicated with the filter element extends out of the probe, and the sampling pipe is communicated with a first electromagnetic valve. During sampling, dust particles mixed in smoke can be adsorbed, and the situation that sampling cannot be carried out normally and the data accuracy is affected due to the fact that the filter element is blocked is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas sampling filter technical field, specifically related to a kind of flue gas on-line sampling filter device with electrostatic dust removal. BACKGROUND

[0002] With the popularization of green, environmental protection concept, current domestic and foreign enterprises pay attention to pollution-free production, in the desulfurization and denitrification process of related enterprises such as oil refinery, a large amount of flue gas will be generated, flue gas equipment will be used to reasonably monitor flue gas, to prevent flue gas discharged into the atmosphere from causing acid rain and causing environmental and air pollution, after the flue gas sampling and filtering process, the monitoring data accuracy of flue gas can be effectively improved;But the existing flue gas sampling and filtering device has the problem that the dust in the flue gas adheres to the filter element of the filtering device, causing blockage, resulting in that sampling cannot be normally carried out, affecting data accuracy. SUMMARY

[0003] The main purpose of the utility model is to solve the above-mentioned technical problems to some extent, and a kind of flue gas on-line sampling filter device with electrostatic dust removal is provided, which can adsorb mixed dust particles in flue gas during sampling, avoid filter element blockage, resulting in that sampling cannot be normally carried out, affecting data accuracy.

[0004] The above-mentioned problems solved by the utility model are realized by the following technical schemes:

[0005] A kind of flue gas on-line sampling filter device with electrostatic dust removal is provided, including probe, probe rod, flange and filter element, the probe is fixedly connected with the flange, and is assembled with flange outside the chimney, the end of the probe rod is assembled in the flange and is communicated with the probe, its other end extends into the chimney, and the end of its side in the chimney is provided with air inlet, and electrode is arranged in the probe rod, wherein the upper end of the probe rod is positive electrode, and the lower end of the probe rod is negative electrode, to form electrostatic field on the wall of the probe rod;

[0006] The filter element is arranged in the probe, and the sampling pipe communicated with the probe is arranged outside the probe, the sampling pipe is provided with first electromagnetic valve, one end of the first electromagnetic valve is provided with air supply pipe, the air supply pipe is provided with second electromagnetic valve, the first electromagnetic valve, second electromagnetic valve and electrode are electrically connected with the controller arranged outside the chimney.

[0007] In some embodiments, the temperature sensor arranged in the probe is electrically connected with the controller.

[0008] In some embodiments, the flow meter is arranged outside the sampling pipe, and the flow meter is electrically connected with the controller.

[0009] In some embodiments, the filter element adopts a spherical structure filter element.

[0010] In some embodiments, the fixed seat is arranged inside the probe rod along the length direction, and the electrode is fixed to the fixed seat and assembled in the probe rod.

[0011] In some embodiments, the limiting seat arranged on the outer wall of the probe rod is attached to the flange and fixedly connected through bolts.

[0012] The above technical solutions provided by the present application have the following advantages compared with the prior art:

[0013] The probe rod is arranged in the chimney, and the electrode is arranged inside the probe rod, so that an electrostatic field is formed on the pipe wall of the probe rod, thereby performing electrostatic dust removal on the flue gas, and the flue gas after dust removal enters the probe and then enters the filter element, and the mixed dust particles in the flue gas are adsorbed on the pipe wall of the probe rod through the electrostatic field, and the dust particles not adsorbed by the probe rod are filtered by the filter element, thereby ensuring the accuracy of the sampling data, and the compressed air injected through the air supply pipe can reverse blow the outer wall of the filter element and the probe rod, remove the accumulated dust particles, and avoid clogging of the filter element. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the structures shown in these drawings without creative labor.

[0015] Figure 1 The structure diagram of the flue gas online sampling and filtering device with electrostatic dust removal of the present application.

[0016] Explanation of reference numerals:

[0017] 100 - chimney; 1 - probe; 2 - probe rod; 3 - flange; 4 - filter element; 5 - limiting seat; 6 - electrode; 7 - fixed seat; 8 - sampling tube; 9 - first electromagnetic valve; 10 - air supply pipe; 11 - second electromagnetic valve; 12 - controller; 13 - temperature sensor; 14 - flow meter. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0019] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, and the like), the directional indications are only used to explain the relative positional relationship, movement condition and the like between components in a certain specific posture, and if the specific posture changes, the directional indications also change accordingly.

[0020] In addition, if the embodiments of the present application involve descriptions such as "first", "second" and the like, the descriptions of "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0021] As shown in the Figure 1 The utility model provides a kind of flue gas on-line sampling filter device with electrostatic dust removal, including probe 1, probe rod 2, flange 3 and filter core 4, probe 1 is fixedly connected with flange 3, and with flange 3 assembly is in chimney 100 outside, the end of probe rod 2 passes through flange 3 and is communicated with probe 1, the abutment 5 of the outer wall of probe rod 2 is attached with flange 3 and is fixedly connected by bolt, this connection structure mode guarantees the stability of the position of probe rod 2, another end of probe rod 2 is inserted into the inside of chimney 100, the end of probe rod 2 located in the inside of chimney 100 side is equipped with air inlet, and electrode 6 is equipped in probe rod 2, fixed seat 7 is equipped in the length direction of probe rod 2, electrode 6 is fixedly arranged in fixed seat 7, and is assembled in probe rod 2 with fixed seat 7, so as to the dismounting replacement of electrode 6 whole, wherein the upper end of probe rod 2 is positive electrode 6, and the lower end of probe rod 2 is negative electrode 6, to form electrostatic field in the pipe wall of probe rod 2.

[0022] The filter core 4 is arranged in the probe 1, and a sampling pipe 8 in communication with the probe 1 extends to the outside of the probe 1, wherein the filter core 4 is a spherical structure filter core 4, the spherical structure has the largest surface area, the most filtering micropores, the smallest plugging probability, the longest filtering time, the sampling pipe 8 is in communication with a first electromagnetic valve 9, one end of the first electromagnetic valve 9 is in communication with a blast pipe 10, the blast pipe 10 is provided with a second electromagnetic valve 11, and the first electromagnetic valve 9, the second electromagnetic valve 11 and the electrode 6 are electrically connected with a controller 12 arranged outside the chimney 100.

[0023] In the embodiment, the probe rod 2 is arranged in the chimney 100, and the electrode 6 is arranged in the probe rod 2, so that an electrostatic field is formed on the wall of the probe rod 2, flue gas enters the probe rod from the air inlet, the electrostatic field performs electrostatic dust removal on the flue gas, the dust-removed flue gas enters the probe 1 from the air inlet and then enters the filter core 4, and the dust particles mixed in the flue gas are adsorbed on the wall of the probe rod 2 through the electrostatic field, and the dust particles not adsorbed by the probe rod 2 are filtered by the filter core 4, so that the accuracy of the sampling data is ensured, and the compressed air injected through the blast pipe 10 can perform reverse blowing on the outer wall of the filter core 4 and the probe rod 2, so that the accumulated dust particles are removed, and the filter core 4 is prevented from being blocked.

[0024] Further, the temperature sensor 13 arranged in the probe 1 is electrically connected with the controller 12, the temperature sensor 13 senses the temperature in the probe 1, the sampling pipe 8 is provided with a flow meter 14 in communication with the outside, and the flow meter 14 is electrically connected with the controller 12, so that the flow change in the sampling pipe 8 is monitored through the flow meter 14.

[0025] When the continuous sampling time reaches 24 hours or the flow meter 14 monitors that the sampling flow in the sampling pipe 8 is insufficient, the controller 12 feeds back the received information to the first electromagnetic valve 9, the second electromagnetic valve 11 and the electrode 6, so that the electrostatic field adsorption of the probe 1 and the compressed air input are linked, at this time, the electrode 6 does not work, the electrostatic field on the wall of the probe rod 2 is closed, the first electromagnetic valve 9 cuts off the sampling of the sampling pipe 8 and is in communication with the blast pipe 10, the second electromagnetic valve 11 is opened, the compressed air outside the probe 1 is input into the blast pipe 10, and then the compressed air enters the sampling pipe 8 to blow the accumulated dust particles on the outer wall of the filter core 4 and the probe rod 2; at the same time, when the temperature sensor 13 senses that the temperature of the probe 1 is lower than 120℃, the second electromagnetic valve 11 is closed, and the probe 1 is waited to rise to 150℃ to continue blowing, so that pulse blowing is formed, so that the heating effect of the probe 1 is always maintained, the temperature is not seriously lowered due to continuous blowing of the low-temperature compressed air, the water vapor in the sample is condensed to accelerate the dust adsorption, the compressed air pressure is higher, the blowing force is higher, and the blowing effect is better, so that the above process is repeated, when the total sampling cutoff time reaches 3 minutes, the controller 12 sends a signal to close the second electromagnetic valve 11, the first electromagnetic valve 9 cuts back to the sampling of the sampling pipe 8, and at the same time, the controller 12 controls the electrode 6 to work, the electrostatic field on the wall of the probe rod 2 is opened, and normal sampling is realized.

[0026] The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. An online sampling and filtration device for flue gas with electrostatic dust removal, characterized in that, The device includes a probe, a probe rod, a flange, and a filter element. The probe is fixedly connected to the flange and is assembled on the outside of the chimney along with the flange. One end of the probe rod is assembled on the flange and communicates with the probe. The other end of the probe rod extends into the inside of the chimney, and an air inlet is provided at the end of the probe rod located on the inside side of the chimney. An electrode is provided inside the probe rod, wherein the upper end of the probe rod is a positive electrode and the lower end of the probe rod is a negative electrode, so as to form an electrostatic field on the tube wall of the probe rod. The filter element is located inside the probe, and a sampling tube connected to it extends to the outside of the probe. The sampling tube is connected to a first solenoid valve, one end of which is connected to an air supply pipe. A second solenoid valve is installed on the air supply pipe. The first solenoid valve, the second solenoid valve, and the electrode are electrically connected to a controller installed outside the chimney.

2. The online flue gas sampling and filtration device with electrostatic dust removal according to claim 1, characterized in that, The temperature sensor installed inside the probe is electrically connected to the controller.

3. The online flue gas sampling and filtration device with electrostatic dust removal according to claim 1, characterized in that, A flow meter is externally connected to the sampling tube, and the flow meter is electrically connected to the controller.

4. The online sampling and filtration device for flue gas with electrostatic dust removal according to claim 1, characterized in that, The filter element adopts a spherical structure.

5. The online flue gas sampling and filtration device with electrostatic dust removal according to claim 1, characterized in that, The probe rod has a fixed seat inside along its length, and the electrode is fixed to the fixed seat and assembled inside the probe rod along with the fixed seat.

6. The online sampling and filtration device for flue gas with electrostatic dust removal according to claim 1, characterized in that, The limiting seat on the outer wall of the probe rod is attached to the flange and fixedly connected by bolts.

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