Anti-blocking quick-response flue gas dilution sampling probe

Abstract

The utility model discloses an anti-blocking quick-response flue gas diluting and sampling probe, which is different from a traditional direct extraction and sampling mode through the design of an inertia acceleration filter tube, realizes acceleration and preliminary filtration of entering flue gas, enables impurities in the flue gas to be separated due to inertia effect, and improves the sampling efficiency. Therefore, a rear-end monitoring system can obtain a fresh smoke sample in real time, and the response speed is increased; by means of the function of accelerating separation of impurities in flue gas through inertia pre-extraction, blockage of the filter element is effectively reduced, the service life of the filter element is prolonged, the maintenance period is shortened, the maintenance cost is reduced, the filter element can be applied to heavy pollution occasions, and the application range of dilution sampling is greatly enlarged; according to the sampling probe, the inertial acceleration filter tube is arranged for preliminary filtration, and the flue gas is further purified through the dilution device, so that dual purification and filtration functions are realized, the dilution device is effectively protected, and the stability and reliability of dilution sampling are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas sampling technical field especially, relate to a kind of anti-blocking type fast response flue gas dilution sampling probe. BACKGROUND

[0002] With the gradual improvement of China's industrial production manufacturing level, the monitoring limit of industrial boiler tail gas emission is gradually reduced, and the traditional flue gas emission CEMS system cannot meet the monitoring requirements, and the ordinary dilution method CEMS system has higher requirement on flue gas cleanliness, if the on-site particulate matter concentration is relatively high or the flue gas contains easily crystallized substances, the ordinary dilution sampler uses screen or sintered filter to filter flue gas, but due to the limitation of filtering precision, part of the small particle size of dust particles and other impurities can penetrate the filter.

[0003] Firstly, the dilution device of the dilution sampling method uses the principle of orifice plate throttling to realize dilution ratio control, the diameter of "sound velocity small hole" is very small, and the fine impurities entering the dilution device of the sampler are very easy to block the small hole, causing the dilution device to fail, the filtering efficiency to decrease, and the maintenance cost of the equipment to increase due to the need to clean or replace the filter frequently; secondly, the sampling flow of the ordinary dilution sampler is very small, and fresh sample gas cannot be continuously and quickly obtained, resulting in slow response speed of the rear-end monitoring system. The above reasons lead to the fact that the current dilution method CEMS cannot be fully popularized in the flue gas online analysis industry, and the existing device needs to be improved. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, in order to solve the above technical problems, the utility model provides the following technical scheme: an anti-blocking type fast response flue gas dilution sampling probe, comprising a main unit and a dilution unit;

[0006] The main unit comprises a sample collection flange, the sample collection flange is connected with an inertial acceleration filter pipe, the rear end of the inertial acceleration filter pipe is connected with a heater, the tail end outlet of the heater is connected with a primary sampling connector, the primary sampling connector is connected with a main jet pump, the main jet pump is provided with a main driving gas connector, the outlet of the main jet pump is connected with a sample return pipe, the sample return pipe is connected with an exhaust pipe, and the tail end of the exhaust pipe is provided with a main exhaust connector;

[0007] The dilution unit comprises a dilution device, a secondary sampling joint is connected to an inlet of the dilution device, the secondary sampling joint is in communication with a top opening of the heater, a pipeline is connected between an outlet of the dilution device and a secondary jet pump, a secondary driving air joint for connecting compressed air is arranged on the secondary jet pump, and a dilution sample exhaust joint is connected to an outlet of the secondary jet pump and used for connecting a rear-end analysis device.

[0008] As a preferred scheme of the anti-blocking type fast-response flue gas dilution sampling probe, the sample collection flange is used for connecting a flue gas source and collecting a flue gas sample, and the inertial acceleration filter pipe is arranged behind the sample collection flange and used for accelerating and preliminarily filtering the entering flue gas, so that impurities in the flue gas are separated due to inertial effect.

[0009] As a preferred scheme of the anti-blocking type fast-response flue gas dilution sampling probe, a filter medium is arranged in the inertial acceleration filter pipe, and the filter medium is glass fiber filter medium, which can efficiently capture large-particle impurities in the flue gas and simultaneously allow small-particle and gaseous components in the flue gas to pass through.

[0010] As a preferred scheme of the anti-blocking type fast-response flue gas dilution sampling probe, the heater is used for heating the flue gas to prevent condensate in the flue gas from forming and blocking the pipeline, a secondary sampling opening is formed in a top end of the heater and in communication with the secondary sampling joint, and a main sampling outlet is formed in a tail end of the heater and in communication with the primary sampling joint.

[0011] As a preferred scheme of the anti-blocking type fast-response flue gas dilution sampling probe, the sample back gas pipe is designed in a U-shaped structure and used for preventing gas backflow, and the two ends of the sample back gas pipe are in communication with the main jet pump and the exhaust pipe respectively, and the exhaust pipe is designed in parallel with the heater.

[0012] As a preferred scheme of the anti-blocking type fast-response flue gas dilution sampling probe, the dilution device is provided with a pressure detection joint, the pressure detection joint is used for connecting a pressure detection functional component, and the pressure inside the device can be monitored in real time.

[0013] The anti-blocking type fast-response flue gas dilution sampling probe has the following beneficial effects:

[0014] 1、The inertial acceleration filter pipe is designed, which is different from the traditional direct sampling mode, realizes acceleration and preliminary filtration of the entering flue gas, separates impurities in the flue gas due to inertial effect, and thus ensures that the rear-end monitoring system can obtain fresh flue gas samples in real time and improves the response speed.

[0015] 2、The utility model discloses a function of accelerating the separation of impurities in flue gas through inertial pre-exhaust gas, effectively reduces the plugging of filter core, prolongs the service life of filter core, reduces the maintenance cycle and cost, makes it can be applied in heavy pollution occasion, greatly increases the application range of dilution sampling.

[0016] 3、The utility model discloses not only set up the inertial acceleration filter tube and carry out preliminary filtration, still purify flue gas further through dilution device, realized double purification and filter function, effectively protected dilution device, improved the stability and reliability of dilution sampling. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the technical scheme of the embodiments of the utility model more apparent and easy to understand, the following will briefly introduce the drawings needed in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled person in the art, other drawings can also be obtained according to these drawings without the creative labor, wherein:

[0018] Fig. 1 It is the whole structure schematic diagram of the utility model.

[0019] Fig. 2 It is the mounting structure schematic diagram of the sample back gas pipe of the utility model.

[0020] Fig. 3 It is the specific structure schematic diagram of the dilution unit of the utility model.

[0021] Fig. 4 It is the whole structure schematic diagram of the flue gas dilution sampling probe in prior art.

[0022] In the drawing: 100, main unit;101, sample collection flange;102, inertial acceleration filter tube;103, heater;104, primary sampling connector;105, main jet pump;106, main driving gas connector;107, sample back gas pipe;108, exhaust pipe;109, main exhaust connector;

[0023] 200, dilution unit;201, dilution device;202, secondary sampling connector;203, secondary jet pump;204, secondary driving gas connector;205, dilution sample exhaust connector;206, pressure detection connector. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purpose, features and advantages of the utility model more apparent and easy to understand, the following will make detailed description to the specific implementation of the utility model with the drawing in the specification.

[0025] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be described in detail herein, and the skilled person can make similar generalizations without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0026] Secondly, the "one embodiment" or "embodiment" referred to herein can include specific features, structures or characteristics included in at least one implementation of the present application. "In one embodiment" appearing in different places in this specification does not refer to the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0027] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the cross-sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0028] Referring to Figs. 1-3 For the embodiments of the present application, a rapid-response anti-blocking flue gas dilution sampling probe is provided, comprising a main unit 100 and a dilution unit 200;

[0029] The main unit 100 comprises a sample collection flange 101, which is used to connect a flue gas source and collect a flue gas sample; the sample collection flange 101 is connected with an inertial acceleration filter tube 102, which is arranged behind the sample collection flange 101, and the inertial acceleration filter tube 102 is internally provided with a filter medium, which is a glass fiber filter medium, used for accelerating and preliminarily filtering the entering flue gas, which can efficiently capture large-particle impurities in the flue gas, while allowing small-particle and gaseous components in the flue gas to pass through, so that the impurities in the flue gas are separated due to the inertial effect; the rear end of the inertial acceleration filter tube 102 is connected with a heater 103, which is used to heat the flue gas to prevent the formation of condensate in the flue gas and block the pipeline; the tail end of the heater 103 is provided with a main sampling outlet, which is in communication with a primary sampling connector 104 through the main sampling outlet, and the primary sampling connector 104 is connected with a main jet pump 105, which is arranged with a main driving gas connector 106; the outlet of the main jet pump 105 is connected with a sample back gas pipe 107, which is connected with an exhaust pipe 108, and the tail end of the exhaust pipe 108 is arranged with a main exhaust connector 109; the sample back gas pipe 107 is designed in a U-shaped structure to prevent gas backflow; the two ends of the sample back gas pipe 107 are in communication with the main jet pump 105 and the exhaust pipe 108 respectively, and the exhaust pipe 108 is designed in a parallel structure with the heater 103.

[0030] The dilution unit 200 comprises a dilution device 201, a pressure detection joint 206 is arranged on the dilution device 201, the pressure detection joint 206 is used for connecting a pressure detection functional component, so as to facilitate real-time monitoring of the pressure inside the device; a secondary sampling joint 202 is connected at the inlet of the dilution device 201, a secondary sampling port is formed at the top end of the heater 103, and the secondary sampling port is in communication with the secondary sampling joint 202, the outlet of the dilution device 201 is in communication with a secondary jet pump 203 through a pipeline, a secondary driving gas joint 204 for connecting compressed air is arranged on the secondary jet pump 203, a dilution sample exhaust joint 205 is connected at the outlet of the secondary jet pump 203, and the dilution sample exhaust joint 205 is used for connecting a rear-end analysis device.

[0031] In the embodiment: in actual use, compressed air is introduced into the primary jet pump 105 through the primary driving gas joint 106 on the primary jet pump 105, the primary jet pump 105 is driven to generate negative pressure, and then the flue gas is sampled and the airflow is accelerated; in this process, the negative pressure environment causes the flue gas to enter the sampling head from the sample collection flange 101, under the action of inertial force, a large amount of flue gas samples pass through the inertia acceleration filter pipe 102 at high speed, large-particle impurities in the flue gas are separated and remain on the filter medium in the inertia acceleration filter pipe 102, and the relatively clean flue gas continues to flow backward; the flue gas after preliminary filtration enters the heater 103 for heating, so as to prevent condensate from forming and blocking the pipeline.

[0032] At the same time, pure compressed air for diluting sample gas is introduced into the secondary jet pump 203 through the secondary driving gas joint 204 on the secondary jet pump 203, the gas is not only used for dilution, but also drives the secondary jet pump 203 to generate negative pressure; because the secondary sampling joint 202 is in communication with the secondary jet pump 203, negative pressure is also generated in the secondary sampling joint 202, so that a small amount of sample flue gas is separated from the airflow in the inertia acceleration filter pipe 102, and after filtration by the filter medium, the small amount of sample flue gas directly enters the dilution device 201;

[0033] In this process, the remaining large amount of flue gas after preliminary filtration and impurities is discharged from the sample return pipe 107 to the exhaust pipe 108 and is discharged through the primary exhaust joint 109;

[0034] The sample gas to be measured is mixed with the pure compressed air for diluting sample gas introduced through the secondary jet pump 203 in the dilution device 201, to form a sample gas flow with high cleanliness, and then is sent to the analysis system at the rear end through the dilution sample exhaust joint 205, for further processing and analysis.

[0035] It is worth noting that the whole device is controlled by the controller, and the controller is a common device and belongs to the existing mature technology, so the electrical connection relationship and the specific circuit structure are not described here.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application. It should be included in the scope of the claims of the present application.

Claims

1. A fast-response, anti-blocking flue gas dilution sampling probe, characterized by: It comprises a main body unit (100) and a dilution unit (200); The main unit (100) comprises a sample collection flange (101), the sample collection flange (101) is connected to an inertial acceleration filter tube (102), the rear end of the inertial acceleration filter tube (102) is connected to a heater (103), the tail end outlet of the heater (103) is connected to a primary sampling connector (104), the primary sampling connector (104) is connected to a main jet pump (105), a main driving air connector (106) is arranged on the main jet pump (105), the outlet of the main jet pump (105) is connected to a sample return air pipe (107), the sample return air pipe (107) is connected to an exhaust pipe (108), and the tail end of the exhaust pipe (108) is arranged with a main exhaust connector (109); The dilution unit (200) comprises a dilution device (201), the inlet of the dilution device (201) is connected to a secondary sampling connector (202), the secondary sampling connector (202) is communicated with the top opening of the heater (103), the outlet of the dilution device (201) is communicated with a secondary jet pump (203) through a pipeline, the secondary jet pump (203) is provided with a secondary driving air connector (204) for receiving compressed air, the outlet of the secondary jet pump (203) is connected to a diluted sample exhaust connector (205), and the diluted sample exhaust connector (205) is used to connect to a back-end analysis device.

2. The anti-blocking fast-response flue gas dilution sampling probe according to claim 1, characterized in that: The sample collection flange (101) is used to connect to a smoke source and collect smoke samples. The inertial acceleration filter tube (102) is arranged behind the sample collection flange (101) and is used to accelerate and preliminarily filter the incoming smoke, so that impurities in the smoke are separated due to inertia.

3. The anti-blocking fast-response flue gas dilution sampling probe according to claim 1, characterized in that: The inertial acceleration filter tube (102) is provided with a filter medium inside, and the filter medium is a glass fiber filter medium. The filter medium can efficiently capture large particle impurities in the smoke while allowing small particles and gaseous components in the smoke to pass through.

4. The anti-blocking fast-response flue gas dilution sampling probe according to claim 1, characterized in that: The heater (103) is used to heat the flue gas to prevent condensation in the flue gas from forming and clogging the pipeline; a secondary sampling port is provided at the top end of the heater (103), and is connected to the secondary sampling connector (202) through the secondary sampling port; a main sampling outlet is provided at the tail end of the heater (103), and is connected to the primary sampling connector (104) through the main sampling outlet.

5. The anti-blocking fast-response flue gas dilution sampling probe according to claim 1, characterized in that: The sample return pipe (107) is designed in a U-shaped structure to prevent gas backflow; the two ends of the sample return pipe (107) are respectively connected to the main jet pump (105) and the exhaust pipe (108), and the exhaust pipe (108) and the heater (103) are designed in a parallel structure.

6. The anti-blocking fast-response flue gas dilution sampling probe according to claim 1, characterized in that: The dilution device (201) is provided with a pressure detection connector (206), which is used to connect to a pressure detection functional component to facilitate real-time monitoring of the pressure situation inside the device.

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