Online powder detection device for carbon black tail gas

Abstract

The utility model relates to the technical field of carbon black tail gas, in particular to an online powder detection device for carbon black tail gas. The utility model aims to provide a device capable of detecting whether carbon black tail gas contains carbon black powder or not in real time, namely an online powder detection device for the carbon black tail gas. Comprising a pressure difference sensor, a pressure difference transmitter and a digital display instrument, the pressure difference sensor is connected with the pressure difference transmitter in a matched mode, and the digital display instrument is connected with the negative pressure pipeline in a matched mode. The pressure difference transmitter is electrically connected with the digital display instrument, two detection ports of the pressure difference transducer are communicated with the other end of the positive pressure pipeline and the other end of the negative pressure pipeline respectively, and a throttling element of the pressure difference transducer is a filter screen. The carbon black tail gas on-line powder detection device can realize on-line real-time detection of carbon black tail gas powder.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon black tail gas, in particular to an on-line powder detection device for carbon black tail gas. Background Technique

[0002] In the existing carbon black industry, in the carbon black collection process, the carbon black flue gas containing carbon black powder sent from the upstream section is filtered by a bag filter to separate the carbon black powder from the carbon black tail gas. The separated carbon black powder is then sent to the pneumatic conveying pipeline through the main bag airtight valve, and is sent to the collecting bag filter for collection by the air conveying fan and then transported to the downstream granulation; for the filtered carbon black tail gas, a part of it is still sent back to the main bag after being pressurized by the main bag reverse blower and used as the main bag reverse blowing gas in a cycle, and another part is sent to the power plant boiler for combustion power generation or the carbon black tail gas furnace for combustion heating after being pressurized by the tail gas pressurizing fan. However, if the filtration efficiency of the carbon black tail gas is low and the carbon black tail gas contains carbon black powder, it will cause abnormal production of downstream carbon black tail gas users. For example, the combustion efficiency of the power plant boiler or the carbon black tail gas furnace is low, the steam temperature is on the low side, the temperature of the flue gas after combustion is high, and the sulfur dioxide emission data exceeds the standard, resulting in environmental pollution. If these abnormal situations are not discovered and processed in time, it will cause the entire carbon black production system to be unable to operate stably and safely, resulting in poisoning of the desulfurization liquid of the tail gas user and accidents of exceeding the environmental protection data standard. Therefore, there is an urgent need for a device that can detect in real time whether the carbon black tail gas contains carbon black powder. Summary of the Invention

[0003] The purpose of the utility model is to provide a device that can detect in real time whether the carbon black tail gas contains carbon black powder, that is, an on-line powder detection device for carbon black tail gas.

[0004] The utility model is realized by adopting the following technical scheme:

[0005] An on-line powder detection device for carbon black tail gas includes a negative pressure pipeline whose one end is communicated with the inlet pipeline of the tail gas pressurizing fan, a positive pressure pipeline whose one end is communicated with the outlet pipeline of the tail gas pressurizing fan, and a differential pressure sensing component. The differential pressure sensing component includes a differential pressure sensor, a differential pressure transmitter, and a digital display instrument. The differential pressure sensor is adaptively connected to the differential pressure transmitter, and the differential pressure transmitter is electrically connected to the digital display instrument. The two detection ports of the differential pressure sensor are respectively communicated with the other end of the positive pressure pipeline and the other end of the negative pressure pipeline, and the throttling element of the differential pressure sensor is a filter screen.

[0006] Working principle: When the carbon black tail gas contains carbon black powder, the filter screen will be blocked, resulting in a change in the differential pressure between the two detection ports of the differential pressure sensor, so as to remind the operator to make timely process adjustments, reduce losses, and ensure the safe and stable operation of the carbon black production system.

[0007] Further, an inlet valve is provided on the negative pressure pipeline, and an outlet valve is provided on the positive pressure pipeline, which is convenient for use during maintenance.

[0008] Further, a test pipe orifice is provided on the negative pressure pipeline. The test pipe orifice is located between the inlet valve and the differential pressure sensor, and a test valve is arranged on the test pipe orifice. After the differential pressure sensing component is installed, it can be tested. During the test, the tail gas pressurizing fan is turned on, the inlet valve and the outlet valve are opened, and at the same time the test valve is opened. Carbon black powder is introduced at the test pipe orifice to test whether the differential pressure sensing component can detect the carbon black powder contained in the carbon black tail gas when the carbon black tail gas contains carbon black powder.

[0009] Further, a backflush pipe orifice is provided on the positive pressure pipeline. The backflush pipe orifice is located between the outlet valve and the differential pressure sensor, and a backflush valve is arranged on the backflush pipe orifice. After the differential pressure sensing component is tested through the test pipe orifice, the inlet valve and the outlet valve are closed, the backflush valve is opened, and compressed air is backflushed at the backflush pipe orifice, so as to backflush the carbon black powder remaining on the filter screen during the test out of the test pipe orifice, avoiding the carbon black powder remaining on the filter screen from affecting the test result.

[0010] Further, the device further includes an alarm component. The alarm component includes a controller and an alarm. The input end of the controller is connected to the differential pressure transmitter, and the output end of the controller is connected to the alarm. The controller receives the differential pressure signal sent by the differential pressure transmitter and judges the received differential pressure signal, and controls whether the alarm operates according to the judgment result, which is convenient for timely alarm to remind the operator that the carbon black tail gas contains carbon black powder and deal with it in time.

[0011] Further, the nominal diameters of both the positive pressure pipeline and the negative pressure pipeline are 50 mm, and the nominal diameters of both the test pipe orifice and the backflush pipe orifice are 20 mm.

[0012] The beneficial effects produced by the present utility model are as follows: The on-line powder detection device for carbon black tail gas described in the present utility model can realize on-line real-time detection of carbon black tail gas, can discover problems in the first time, effectively reduces the occurrence of accidents such as poor boiler combustion efficiency, poisoning of desulfurization liquid of tail gas users, and environmental protection data exceeding the standard caused by the carbon black powder contained in the carbon black tail gas, and ensures the safe and stable operation of the entire carbon black production system. Description of the Drawings

[0013] The drawings here are incorporated into the description and form a part of this description, showing the embodiments in line with the present utility model, and are used together with the description to explain the principle of the present utility model.

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] In the figure: 1 - tail gas pressurizing fan, 2 - inlet pipeline, 3 - outlet pipeline, 4 - positive pressure pipeline, 5 - negative pressure pipeline, 6 - differential pressure sensing component, 7 - filter screen, 8 - inlet valve, 9 - outlet valve, 10 - test pipe orifice, 11 - test valve, 12 - backwashing pipe orifice, 13 - backwashing valve. Specific embodiments

[0017] In order to be able to more clearly understand the above objects, features and advantages of the present invention, the following will further describe the solution of the present invention. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0018] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. It should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0019] Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all the embodiments.

[0020] The following will detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0021] Such as Figure 1As shown in the figure, an on-line powder detection device for carbon black tail gas includes a negative pressure pipeline 5 whose one end is connected to the inlet pipeline 2 of the tail gas pressurizing fan 1, a positive pressure pipeline 4 whose one end is connected to the outlet pipeline 3 of the tail gas pressurizing fan 1, and a differential pressure sensing component 6. The differential pressure sensing component 6 includes a differential pressure sensor, a differential pressure transmitter, and a digital display instrument. The differential pressure sensor is adaptively connected to the differential pressure transmitter, and the differential pressure transmitter is electrically connected to the digital display instrument. The two detection ports of the differential pressure sensor are respectively connected to the other end of the positive pressure pipeline 4 and the other end of the negative pressure pipeline 5. The throttling element of the differential pressure sensor is a filter screen 7.

[0022] Working principle: When the carbon black tail gas contains carbon black powder, the filter screen 7 will be blocked, resulting in a change in the differential pressure between the two detection ports of the differential pressure sensor, so as to remind the operators to make process adjustments in time, reduce losses, and ensure the safe and stable operation of the carbon black production system.

[0023] During specific implementation, an inlet valve 8 is provided on the negative pressure pipeline 5, and an outlet valve 9 is provided on the positive pressure pipeline 4, which is convenient for use during maintenance.

[0024] During specific implementation, a test pipe orifice 10 is provided on the negative pressure pipeline 5. The test pipe orifice 10 is located between the inlet valve 8 and the differential pressure sensor, and a test valve 11 is equipped on the test pipe orifice 10. After the differential pressure sensing component 6 is installed, the differential pressure sensing component 6 can be tested. During the test, the tail gas pressurizing fan 1 is turned on, the inlet valve 8 and the outlet valve 9 are opened, and at the same time the test valve 11 is opened. Carbon black powder is introduced at the test pipe orifice 10 to test whether the differential pressure sensing component 6 can detect the carbon black powder contained in the carbon black tail gas when the carbon black tail gas contains carbon black powder.

[0025] During specific implementation, a backwashing pipe orifice 12 is provided on the positive pressure pipeline 4. The backwashing pipe orifice 12 is located between the outlet valve 9 and the differential pressure sensor, and a backwashing valve 13 is equipped on the backwashing pipe orifice 12. After the differential pressure sensing component 6 is tested through the test pipe orifice 10, the inlet valve 8 and the outlet valve 9 are closed, the backwashing valve 13 is opened, and compressed air is backwashed at the backwashing pipe orifice 12, so as to blow out the carbon black powder remaining on the filter screen 7 during the test from the test pipe orifice 10, and avoid the carbon black powder remaining on the filter screen 7 from affecting the detection results.

[0026] During specific implementation, the device further includes an alarm component. The alarm component includes a controller and an alarm. The input end of the controller is connected to the differential pressure transmitter, and the output end of the controller is connected to the alarm. The controller receives the differential pressure signal sent by the differential pressure transmitter and judges the received differential pressure signal, and controls whether the alarm acts according to the judgment result, so as to alarm and remind the operators in time that the carbon black tail gas contains carbon black powder and deal with it in time.

[0027] In this specific embodiment, the nominal diameters of the positive pressure pipeline 4 and the negative pressure pipeline 5 are both 50 mm, and the nominal diameters of the test pipe orifice 10 and the backflush pipe orifice 12 are both 20 mm.

[0028] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Although the foregoing embodiments have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the respective embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. An on-line powder detection device for carbon black tail gas, characterized in that, It includes a negative pressure pipeline (5) with one end communicating with the inlet pipeline (2) of the tail gas pressurizing fan (1), a positive pressure pipeline (4) with one end communicating with the outlet pipeline (3) of the tail gas pressurizing fan (1), and a differential pressure sensing assembly (6). The differential pressure sensing assembly (6) includes a differential pressure sensor, a differential pressure transmitter, and a digital display instrument. The differential pressure sensor is adaptively connected to the differential pressure transmitter, and the differential pressure transmitter is electrically connected to the digital display instrument. The two detection ports of the differential pressure sensor are respectively communicated with the other end of the positive pressure pipeline (4) and the other end of the negative pressure pipeline (5). The throttling element of the differential pressure sensor is a filter screen (7).

2. The on-line powder detection device for carbon black tail gas according to claim 1, characterized in that, An inlet valve (8) is provided on the negative pressure pipeline (5), and an outlet valve (9) is provided on the positive pressure pipeline (4).

3. An on-line powder detection device for carbon black tail gas according to claim 2, characterized in that, A test pipe orifice (10) is provided on the negative pressure pipeline (5). The test pipe orifice (10) is located between the inlet valve (8) and the differential pressure sensor, and a test valve (11) is provided on the test pipe orifice (10).

4. An on-line powder detection device for carbon black tail gas according to claim 3, characterized in that, An anti-blowing pipe orifice (12) is provided on the positive pressure pipeline (4). The anti-blowing pipe orifice (12) is located between the outlet valve (9) and the differential pressure sensor, and an anti-blowing valve (13) is provided on the anti-blowing pipe orifice (12).

5. An on-line powder detection device for carbon black tail gas according to claim 4, characterized in that, The device further includes an alarm assembly. The alarm assembly includes a controller and an alarm. The input end of the controller is connected to the differential pressure transmitter, and the output end of the controller is connected to the alarm.

6. The on-line powder detection device for carbon black tail gas according to claim 5, characterized in that, The nominal diameters of both the positive pressure pipeline (4) and the negative pressure pipeline (5) are 50 mm, and the nominal diameters of both the test pipe orifice (10) and the anti-blowing pipe orifice (12) are 20 mm.

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