Pulverized coal bunker CO gas analysis device

Abstract

The utility model relates to the technical field of gas detection, in particular to a pulverized coal bunker CO gas analysis device which comprises a sampling probe (1), a cleaning structure is arranged on the sampling probe (1); the sampling probe (1) is connected with a detection module; the cleaning structure is used for removing smoke dust, impurities and condensates attached to the surface of the probe and components in the probe by applying reverse airflow into the sampling probe, so that the measurement accuracy is kept, the service life of equipment is prolonged, the maintenance workload is reduced, the sampling flow stability is ensured, and the system reliability is enhanced; the detection module can be used for removing water and possibly residual small particles in the sampled flue gas as well as tiny liquid drops or condensates possibly generated in the dehumidification process; the accurate detection of the CO gas concentration by the device can be effectively realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas detection, specifically, the utility model relates to a pulverized coal bunker CO gas analysis device. BACKGROUND

[0002] As a commonly used fuel in industrial production, especially in the power, steel and cement industries, coal powder has significant safety hazards during storage and use; CO gas accumulation in the coal bunker is easily caused by the following reasons; coal powder self-heating and oxidation reaction: when coal powder is stored for a long time, the CO content may gradually increase due to its own oxidation reaction or spontaneous combustion tendency; especially in the case where a large amount of heat generated during coal powder grinding is not fully dissipated, the temperature in the bunker rises, accelerating the oxidation process of the coal powder.

[0003] Moisture control and self-flow risk: when the moisture content of coal powder is lower than its inherent moisture, not only can it cause the coal powder to become more fluid, but also can affect the thermal balance of the oxidation reaction due to insufficient moisture, further exacerbating the generation of CO.

[0004] Poor ventilation and local hot spots: the internal structure of the coal bunker is complex, and when the ventilation conditions are not ideal, local high-temperature areas are easily formed, increasing the risk of CO accumulation; in addition, the unevenness of the coal powder accumulation state can also cause uneven distribution of oxygen, local oxygen depletion and CO enrichment.

[0005] In view of the above risks, domestic and foreign safety production regulations and standards usually require strict safety monitoring of the coal bunker, including real-time monitoring of the CO gas concentration, to prevent the occurrence of major safety accidents such as fire and explosion; under the complex working conditions of the coal bunker (such as high dust, large temperature and humidity fluctuations), traditional analysis equipment can be disturbed, resulting in a decrease in measurement accuracy and poor data stability; and some systems lack advanced data analysis, alarm linkage, remote monitoring and other functions, and cannot meet the requirements of modern industrial automation and informatization; at the same time, the existing sampling probe is difficult to clean and is prone to blockage, affecting normal sampling work.

[0006] The applicant found, through a search, that Chinese patent document No. CN106290720A disclosed a gas injection mask CO&H2 detection device and detection method on January 4, 2017. Among them, the CO&H2 wireless detector of the gas injection mask CO&H2 detection device is installed on a closed circuit and moves together, and sends the measured CO&H2 concentration value to the controller; the positioner is used to track the position of the CO&H2 wireless detector, and sends the position information of the CO&H2 wireless detector to the controller; the controller establishes a mapping relationship between the CO&H2 concentration value and the position information, and obtains the CO&H2 concentration value of each position; the device cannot solve the above technical problems.

[0007] Therefore, in order to improve or solve the above at least one problem, it is necessary to optimize the existing CO detection device. Utility model content

[0008] The utility model discloses a kind of coal powder bin CO gas analysis devices, which can accurately detect the CO gas concentration in coal powder bin, and the sampling probe is easy to clean.

[0009] To solve the above technical problems, the utility model takes the technical scheme: a kind of coal powder bin CO gas analysis device, including sampling probe;Clean structure is equipped on the sampling probe;Sampling probe is connected with detection module.

[0010] The sampling probe includes a sealing column;The bottom of the sealing column is connected with a sampling front extension probe rod;The top of the sealing column is connected with a flue gas sampling port;A filter element is provided in the sealing column;The cleaning structure is provided on the side surface of the sealing column.

[0011] The cleaning structure includes an outer backflush pipe and an inner backflush pipe;The outer backflush pipe and the inner backflush pipe are both provided on the sealing column and communicate with the inside of the sealing column;The outer backflush pipe is provided on both sides of the filter element;The inner backflush pipe is provided on the side of the sealing column away from the flue gas sampling port and on the top of the filter element.

[0012] The filter element includes a filter section;A connecting section is provided on the top of the filter section;A connecting block is provided on the top of the sealing column;A first air groove, a second air groove and a connecting hole are respectively provided on the connecting block;The first air groove and the second air groove both communicate with the connecting hole;The first air groove is connected with the inner backflush pipe;The second air groove is connected with the flue gas sampling port;The connecting section is connected in the connecting hole, and the inside of the connecting section communicates with the connecting hole.

[0013] An installation hole is provided on the end of the sealing column away from the connecting block;The end of the sampling front extension probe rod is connected in the installation hole;A fixing plate is provided on the end of the sealing column;The fixing plate extends outward along the edge of the sealing column;A flange is sleeved on the sampling front extension probe rod;The flange is connected with the fixing plate.

[0014] The detection module includes an explosion-proof cabinet;An electromagnetic valve is provided in the explosion-proof cabinet;One end of the electromagnetic valve is connected with the flue gas sampling port;The other end of the electromagnetic valve is connected with a condenser.

[0015] The condenser is connected with a fine filter;The fine filter is connected with the output end of the condenser.

[0016] The fine filter is connected with a CO gas detector;The CO gas detector is connected with a flow sensor;The flow sensor is connected with a gas diaphragm pump.

[0017] The controller is arranged in the explosion-proof cabinet; the CO gas detector and the flow sensor are connected with the controller; the explosion-proof cabinet is provided with an alarm lamp on one side; the alarm lamp is connected with the controller.

[0018] The inner wall of the sealing column and the sampling front extension probe rod is provided with a Teflon layer; the filter core is a powder sintered filter core; the outer back flushing pipe and the inner back flushing pipe are connected with a blower.

[0019] The application has the following beneficial effects:

[0020] 1. The sampling probe of the application is vertically installed on the top of the coal powder bin; the sampling probe is connected with a detection module; sampling gas is filtered to remove large particle dust through the sampling probe in sequence, water vapor is removed by a condenser, and after depth dust and moisture removal through a secondary fine filter, the sampling gas enters a CO analysis module for concentration determination; and then flow detection is performed through a flow sensor;

[0021] The flue gas often contains a certain amount of moisture, which not only may interfere with the accurate determination of the CO concentration, but also may cause condensation in the flue or the internal analysis instrument under low temperature conditions, affecting the normal operation of the system; therefore, the flue gas after preliminary filtration subsequently enters a moisture removal link; after moisture removal, the flue gas further passes through a secondary filtration step, which can remove possible residual small particles and small droplets or condensates that may be generated in the moisture removal process; accurate detection of the CO gas concentration can be effectively realized.

[0022] According to the CO concentration, the controller can control the nitrogen spraying time to ensure timely and effective fire prevention, while avoiding resource waste; through rigorous design and intelligent control, the entire system realizes accurate monitoring of the CO concentration in the coal powder bin and dynamic management of fire risk.

[0023] 2. The sampling probe of the application is provided with a cleaning structure; the cleaning structure includes an outer back flushing pipe and an inner back flushing pipe; the inner back flushing pipe can output gas, which enters a filtering section through a first gas groove, a connecting hole and a connecting section in sequence; two outer back flushing pipes are arranged on both sides of the filtering section; the outer back flushing pipe and the inner back flushing pipe cooperate to remove smoke dust, impurities and condensates attached to the surface of the probe and internal components by applying reverse airflow to the inside of the sampling probe, maintain measurement accuracy, prolong equipment life, reduce maintenance workload, ensure stable sampling flow, and enhance system reliability;

[0024] The sampling probe is internally provided with a Teflon layer, has strong corrosion resistance, can protect the structure and prolong the service life; the filter core adopts a powder sintered filter core, the powder sintered filter core is easy to be back-flushed, has good cleaning effect and can effectively restore the filtering performance; this makes the filter core have a long service life, can be repeatedly used and reduces the operation cost; and the good high-temperature resistance and corrosion resistance are suitable for filtering operations in high-temperature, acid and alkali and other harsh environments.

[0025] 3、The application adopts the adjustable frequency diaphragm pump combined with the flow sensor, adjusts the sampling rate through real-time feedback of the flow data, stabilizes the sampling airflow, guarantees the accurate and reliable detection data, judges whether the sampling head is blocked through the flow meter, and needs to further manually clean the filter core; the device processes the CO concentration data detected by the equipment, links the control system and the nitrogen spray fire extinguishing system, realizes real-time linkage control, adjusts the CO concentration in the pulverized coal bin, accurately controls the nitrogen spray time, saves nitrogen and saves cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] The specific embodiments of the utility model will be further described in detail below in combination with the drawings, in which:

[0027] Figure 1 It is a structure schematic view of the sampling probe of the coal powder bin CO gas analysis device.

[0028] Figure 2 It is a sectional view of the sampling probe of the coal powder bin CO gas analysis device.

[0029] Figure 3 It is a structure schematic view of the detection module of the coal powder bin CO gas analysis device.

[0030] The marks in the above drawings are all:

[0031] The marks in the drawings are:

[0032] 1, sampling probe, 101, sealing column, 102, sampling front extension probe rod, 103, flue gas sampling port, 104, filter core,

[0033] 2, outer back flushing pipe,

[0034] 3, inner back flushing pipe,

[0035] 4, filter section, 401, connecting section,

[0036] 5, connecting block, 501, first air groove, 502, second air groove, 503, connecting hole,

[0037] 6, mounting hole, 601, fixed plate, 602, flange,

[0038] 7, explosion-proof cabinet, 701, electromagnetic valve, 702, condenser, 703, fine filter, 704, CO gas detector, 705, flow sensor, 706, gas diaphragm pump,

[0039] 8, controller, 801, alarm lamp. DETAILED DESCRIPTION

[0040] The specific embodiments of the present application will be further described in detail below with reference to the drawings, and the purpose is to help the technical personnel in the field to have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present application, and to help them to implement it.

[0041] Figure 1 The pulverized coal bin CO gas analysis device shown comprises a sampling probe 1; the sampling probe 1 is provided with a cleaning structure; the sampling probe 1 is connected with a detection module.

[0042] The cleaning structure removes the soot, impurities and condensate attached to the surface of the probe and the internal components by applying a reverse airflow to the inside of the sampling probe 1, maintains measurement accuracy, prolongs equipment life, reduces maintenance workload, ensures stable sampling flow, enhances system reliability; the detection module can remove moisture and possible residual small particulate matter in the sampling flue gas and tiny droplets or condensate that may be generated in the dehumidification process; it can effectively realize accurate detection of the CO gas concentration of the device.

[0043] The sampling probe 1 comprises a sealing column 101; the bottom of the sealing column 101 is connected with a sampling front extension probe 102; the top of the sealing column 101 is connected with a flue gas sampling port 103; a filter element 104 is arranged in the sealing column 101; the cleaning structure is arranged on the side surface of the sealing column 101.

[0044] The sealing column 101 is provided with a cavity; the sampling front extension probe 102 is a circular tube structure, connected to the bottom of the sealing column 101 and in communication with the cavity; the filter element 104 is a hollow bottle-shaped structure; the sampling flue gas enters the cavity from the sampling front extension probe 102, then enters the filter element 104, and is output to the detection module from the flue gas sampling port 103 after filtration.

[0045] The cleaning structure comprises an outer blowback pipe 2 and an inner blowback pipe 3; the outer blowback pipe 2 and the inner blowback pipe 3 are both arranged on the sealing column 101 and in communication with the inside of the sealing column 101; the outer blowback pipe 2 is arranged on both sides of the filter element 104; the inner blowback pipe 3 is arranged on the side of the sealing column 101 away from the flue gas sampling port 103 and on the top of the filter element 104.

[0046] The end of the outer backflushing pipe 2 and the end of the inner backflushing pipe 3 are connected with the air supply machine; the two outer backflushing pipes 2 are connected on the two sides of the sealing column 101 respectively, which can blow the inner wall of the sealing column 101 and the outer wall of the filter core 104; the inner backflushing pipe 3 is connected on the top of the sealing column 101, which can blow the inside of the filter core 104; the sampling flue gas is guided into the sealing column 101 through the sampling front extension probe 102, and the flue gas is filtered in the cavity through the filter core 104, and the filtered flue gas flows out from the flue gas sampling port 103 to the next stage; in order to maintain the filtering efficiency of the filter core 104, the compressed air is sprayed out alternately through the outer backflushing pipe 2 and the inner backflushing pipe 3 to clean the dust particles attached to the outer surface of the filter core 104.

[0047] The filter core 104 comprises a filtering section 4; the top of the filtering section 4 is provided with a connecting section 401; the top of the sealing column 101 is provided with a connecting block 5; the connecting block 5 is respectively provided with a first air groove 501, a second air groove 502 and a connecting hole 503; the first air groove 501 and the second air groove 502 are in communication with the connecting hole 503; the first air groove 501 is connected with the inner backflushing pipe 3; the second air groove 502 is connected with the flue gas sampling port 103; the connecting section 401 is connected in the connecting hole 503, and the inside of the connecting section 401 is in communication with the connecting hole 503.

[0048] The connecting section 401 and the filtering section 4 are an integral structure; the filtering section 4 is a circular pipe structure, and the diameter is smaller than that of the filtering section 4; the connecting block 5 is detachably connected with the top of the sealing column 101; when cleaning, the inner backflushing pipe 3 outputs air, which passes through the first air groove 501, the connecting hole 503, the connecting section 401 into the filtering section 4 in turn, and then is blown out to the outside of the filtering section 4; when sampling, the flue gas is filtered through the filtering section 4, and is output to the detection module from the connecting section 401 and the flue gas sampling port 103.

[0049] The end of the sealing column 101 away from the connecting block 5 is provided with a mounting hole 6; the end of the sampling front extension probe 102 is connected in the mounting hole 6; the end of the sealing column 101 is provided with a fixed plate 601; the fixed plate 601 extends outward along the edge of the sealing column 101; the sampling front extension probe 102 is sleeved with a flange 602; the flange 602 is connected with the fixed plate 601.

[0050] The flange 602 is bolted with the fixed plate 601, which can realize that the sampling probe 1 is installed at the designated detection position of the coal powder bin.

[0051] The detection module comprises an explosion-proof cabinet 7; the explosion-proof cabinet 7 is provided with an electromagnetic valve 701; one end of the electromagnetic valve 701 is connected with the flue gas sampling port 103; the other end of the electromagnetic valve 701 is connected with a condenser 702.

[0052] The electromagnetic valve 701 can control the opening and closing of the air pipe of the sampled flue gas output by the flue gas sampling port 103, and can control the flow of the gas. The condenser 702 can deeply cool the sampled flue gas, and use the low-temperature condition to promote the condensation and separation of the moisture in the flue gas, and effectively remove the moisture.

[0053] The condenser 702 is connected with a fine filter 703, and the fine filter 703 is connected with the output end of the condenser 702.

[0054] The flue gas after cooling and dehumidification is further deeply purified by the fine filter 703. The fine filter 703 is a high-efficiency particulate air (HEPA) filter, which can ensure that the flue gas has been highly purified and does not contain solid or liquid impurities that may affect the analysis results when reaching the CO concentration measurement link.

[0055] The fine filter 703 is connected with a CO gas detector 704, the CO gas detector 704 is connected with a flow sensor 705, and the flow sensor 705 is connected with a gas diaphragm pump 706.

[0056] The CO gas detector 704 can accurately detect the CO gas concentration in the sampled flue gas, the flow sensor 705 can detect the flow of the sampled flue gas in real time to avoid low emission efficiency caused by abnormal flow, and the gas diaphragm pump 706 can discharge the sampled gas into the air.

[0057] The explosion-proof cabinet 7 is provided with a controller 8, the CO gas detector 704 and the flow sensor 705 are connected with the controller 8, one side of the explosion-proof cabinet 7 is provided with an alarm lamp 801, and the alarm lamp 801 is connected with the controller 8.

[0058] The controller 8 is a DCS system. When the CO gas detector 704 detects that the CO concentration in the sampled flue gas exceeds the safety threshold, the alarm lamp 801 will light red to prompt personnel to take immediate action. If the flow sensor 705 detects that the flue gas emission flow decreases to below the preset lower limit value, the alarm lamp 801 is yellow, which warns that there may be problems such as poor emission, equipment failure or deviation of operating parameters, and reminds the operator to quickly troubleshoot and adjust to ensure the normal operation of the system and the compliance of the flue gas emission.

[0059] The inner wall of the sealing column 101 and the sampling front extension probe rod 102 is provided with a Teflon layer, the filter core 104 is a powder sintered filter core, and the outer backflush pipe 2 and the inner backflush pipe 3 are connected with a blower.

[0060] The sealing column 101 and the sampling front extension probe 102 are internally provided with a Teflon layer, which is highly corrosion resistant and can protect the structure to prolong its service life; the filter element 104 adopts a powder sintered filter element, which is easy to perform reverse flow cleaning, has good cleaning effect and can effectively restore the filtering performance; this makes the filter element 104 have a long service life and can be repeatedly used, thereby reducing the operation cost; and the good high-temperature resistance and corrosion resistance are suitable for filtering operations in high-temperature, acid and alkali and other harsh environments.

[0061] The specific working process of the utility model is as follows:

[0062] The sampling flue gas is guided into the sealing column 101 by the sampling front extension probe 102 deep into the flue gas source; the flue gas is efficiently filtered in the sealing column 101 through the filter element 104, and the large particle dust therein is removed, and the filtered flue gas flows out from the flue gas sampling port 103 to enter the next stage processing; in order to maintain the filtering efficiency of the filter element 104, the system alternately sprays compressed air through the outer back flushing port 2 and the inner back flushing port 3 to clean the dust particles attached to the outer surface of the filter element 104.

[0063] The flue gas preliminarily processed by the sampling probe 1 is introduced into the condenser 702 through the electromagnetic valve 701 to be deeply cooled; the flue gas after cooling and dehumidification is further deeply purified through the fine filter 703; the purified flue gas then enters the CO gas detector 704, and then the flue gas is monitored in real time through the flow sensor 705; the sampling gas is discharged into the air under the driving of the gas diaphragm pump 706.

[0064] When the CO gas detector 704 detects that the CO concentration in the sampling flue gas exceeds the safety threshold, the alarm lamp 801 will light red to prompt personnel to take immediate measures; if the flow sensor 705 monitors that the flue gas discharge flow decreases below the preset lower limit value, the alarm lamp 801 is yellow, which warns that there may be problems such as poor emission, equipment failure or deviation of operating parameters, and reminds the operator to quickly troubleshoot and adjust to ensure the normal operation of the system and the compliance of the flue gas emission.

[0065] The utility model is described above in conjunction with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or without improvement, the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions, which are within the protection scope of the utility model.

Claims

1. A pulverized coal bunker CO gas analyzing device, characterized by: Including sampling probe (1), the sampling probe (1) is equipped with cleaning structure, the sampling probe (1) is connected with detection module, The sampling probe (1) includes sealing column (101), the bottom of sealing column (101) is connected with sampling front extension probe rod (102), the top of sealing column (101) is connected with flue gas sampling port (103), filter core (104) is arranged in sealing column (101), the cleaning structure is arranged on the side of sealing column (101), The cleaning structure includes outer backflush pipe (2) and inner backflush pipe (3), the outer backflush pipe (2) and the inner backflush pipe (3) are arranged on the sealing column (101) and are communicated with the inside of the sealing column (101), the outer backflush pipe (2) is arranged on both sides of the filter core (104), the inner backflush pipe (3) is arranged on the side of the sealing column (101) away from the flue gas sampling port (103) and is arranged on the top of the filter core (104), The filter core (104) includes filter section (4), the top of filter section (4) is provided with connecting section (401), the top of sealing column (101) is provided with connecting block (5), the first air groove (501), the second air groove (502) and the connecting hole (503) are respectively arranged on the connecting block (5), the first air groove (501) and the second air groove (502) are communicated with the connecting hole (503), the first air groove (501) is connected with the inner backflush pipe (3), the second air groove (502) is connected with the flue gas sampling port (103), the connecting section (401) is connected in the connecting hole (503) and the inside of connecting section (401) is communicated with the connecting hole (503).

2. A coal bunker CO gas analyzing device according to claim 1, characterized in that: The end of the sealing column (101) away from the connecting block (5) is provided with mounting hole (6), the end of the sampling front extension probe rod (102) is connected in the mounting hole (6), the end of the sealing column (101) is provided with fixed plate (601), the fixed plate (601) extends outward along the edge of the sealing column (101), the sampling front extension probe rod (102) is sleeved with flange (602), the flange (602) is connected with the fixed plate (601).

3. A coal bunker CO gas analysis device according to claim 2, characterized by: The detection module includes explosion-proof cabinet (7), the electromagnetic valve (701) is arranged in the explosion-proof cabinet (7), one end of the electromagnetic valve (701) is connected with the flue gas sampling port (103), the other end of the electromagnetic valve (701) is connected with condenser (702).

4. A CO gas analysis device for a pulverized coal bunker according to claim 3, characterized by: The condenser (702) is connected with fine filter (703), the fine filter (703) is connected with the output end of the condenser (702).

5. A CO gas analysis device for a pulverized coal bunker according to claim 4, characterized in that: The fine filter (703) is connected with CO gas detector (704), the CO gas detector (704) is connected with flow sensor (705), the flow sensor (705) is connected with gas diaphragm pump (706).

6. A CO gas analysis device for a pulverized coal bunker according to claim 5, characterized by: The controller (8) is arranged in the explosion-proof cabinet (7); the CO gas detector (704) and the flow sensor (705) are connected with the controller (8); the explosion-proof cabinet (7) is provided with an alarm lamp (801) on one side; the alarm lamp (801) is connected with the controller (8).

7. A coal bunker CO gas analysis device according to any one of claims 2 to 6, characterized in that: The inner wall of the sealing column (101) and the sampling front extension probe rod (102) is provided with a Teflon layer; the filter core (104) is a powder sintered filter core; the outer blowback pipe (2) and the inner blowback pipe (3) are both connected with a wind supply fan.

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