A device and method for measuring the dust removal efficiency of an industrial flue gas dust remover

Abstract

The present application relates to a kind of device and method for measuring the dust removal efficiency of industrial flue gas dust collector, the device includes dust collector, dust collector includes inlet, first outlet, second outlet, the device further includes: dust concentration measuring instrument, set in the flue gas passage before the inlet of dust collector, for measuring the initial concentration of dust in flue gas;Automatic unloading ash measuring device is set on the dust removal channel of dust collector, including vertically arranged pipeline, first valve is sequentially arranged from top to bottom in the pipeline, a pair of second valve, material level meter and timer are arranged between a pair of second valve;Dust collector first outlet is connected to tail gas recovery system by gas outlet channel, and second outlet is connected to automatic unloading ash measuring device by dust removal channel;Automatic unloading ash measuring device dust outlet is communicated with post-processing process device.The present application realizes the accurate measurement of the dust removal efficiency of industrial flue gas dust collector, quantitative test dust removal effect, prompt reasonable instrument equipment maintenance time, and it has important significance to industrial flue gas purification.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial flue gas purification, and particularly to a device and method for measuring dust removal efficiency of an industrial flue gas dust remover. BACKGROUND

[0002] With the increasing environmental pressure, the state has put forward higher requirements for the process equipment, pollution control technology, environmental management level and emission limit value of industrial furnaces, and has accelerated the development of industrial enterprises towards green and environmentally friendly direction. At present, dust removers are widely used in the prevention and control of atmospheric pollutants and play a key role in the dust removal process.

[0003] Dust removal efficiency is the most intuitive technical indicator of dust removal effect. The traditional method is to measure the dust concentration at the inlet and outlet of the dust remover for calculation. However, under some harsh conditions of high temperature and high dust concentration, the dust concentration measuring instrument will not be accurate if it is used continuously for a long time, and it needs to be cleaned and replaced regularly. However, when to maintain the instrument is only based on the subjective experience of the operator, which is not conducive to fine production.

[0004] Therefore, there is an urgent need for new process methods and devices to solve the technical problems of low safety in production accuracy and low accuracy in measuring the dust removal efficiency of industrial flue gas dust removers in the prior art. SUMMARY

[0005] The present application provides a device and method for measuring the dust removal efficiency of an industrial flue gas dust remover, which can solve the technical problems of dust concentration measuring instruments that cannot work continuously for a long time and the difficulty in determining the maintenance time under high temperature and high dust conditions. The present application can safely and accurately measure the dust removal efficiency of industrial flue gas dust removers in production accuracy.

[0006] In a first aspect, the present application provides a device for measuring the dust removal efficiency of an industrial flue gas dust remover, comprising a dust remover, wherein the dust remover comprises an inlet, a first outlet and a second outlet, and the device further comprises:

[0007] a dust concentration measuring instrument arranged in the flue gas channel at the front end of the inlet of the dust remover, for measuring the initial dust concentration in the flue gas;

[0008] an automatic ash unloading measuring device arranged on the dust removal channel of the dust remover, comprising a vertically arranged pipeline, wherein a first valve and a pair of second valves are arranged on the pipeline from top to bottom, and a material level meter and a timer are arranged between the pair of second valves;

[0009] The first outlet of the dust remover is connected to the tail gas recovery system through an air outlet channel, and the second outlet is connected to the automatic ash unloading measuring device through the dust removal channel; and the dust outlet of the automatic ash unloading measuring device is connected to a post-processing process device. The post-processing process device includes but is not limited to an ash storage bin, a water seal slag pool and a solid waste treatment plant.

[0010] The dust concentration measuring instrument is located at the front end of the dust remover inlet, and is used for measuring the initial dust concentration, and the dust in the flue gas is removed in the dust remover.

[0011] Preferably, the material level meter is electrically connected with a pair of second valves through the control unit, and the opening and closing of the pair of second valves is controlled.

[0012] Preferably, the first valve is a manual gate valve, and the opening and closing of the first valve is manually controlled by a person; the second valve is a pneumatic double gate valve, and the opening and closing of the second valve is controlled by the material level meter and the control unit. The manual gate valve is used for maintenance, the material level meter is used for detecting whether the dust removal ash reaches the calibrated volume, and the opening and closing state of the pneumatic double gate valve is controlled by the material level meter signal; the dust removal ash is automatically unloaded and measured by the automatic ash unloading measuring device to realize the interlocking control of the material level signal, and finally the dust removal ash is transported to the post-processing process device. The manual gate valve is kept in an open state under the normal operation state of the system, and is closed in emergency situations such as faults and maintenance.

[0013] Preferably, the pneumatic double gate valve comprises a pneumatic upper gate valve and a pneumatic lower gate valve, and the material level meter is located between the pneumatic upper gate valve and the pneumatic lower gate valve.

[0014] Preferably, the material level meter sends a control signal to control the opening and closing of the pneumatic upper gate valve and the pneumatic lower gate valve when the material level of the dust removal ash reaches a preset position; and the material level meter is provided with at least one. The types of the material level meter include, but are not limited to, a laser material level meter, a radar material level meter, a mechanical material level meter and the like.

[0015] Preferably, a warning component is arranged in the device, and the warning component comprises:

[0016] A dust removal efficiency calculation module is configured to receive an input signal, calculate a dust removal efficiency, and output a dust removal efficiency signal;

[0017] A comparison module is configured to receive the dust removal efficiency signal sent by the dust removal efficiency calculation module, compare the dust removal efficiency signal with a design threshold value and a full efficiency value, and output a comparison result signal;

[0018] A prompt module is configured to receive the comparison result signal output by the comparison module, and output prompt information according to the received comparison result signal.

[0019] In another aspect of the present application, a method for measuring the dust removal efficiency of an industrial flue gas dust remover based on the device is provided, and the method comprises the following steps:

[0020] The pneumatic lower gate valve is closed, the manual gate valve and the pneumatic upper gate valve are opened, and a timer starts timing at the same time;

[0021] The industrial flue gas is introduced into the flue gas pipeline, flows through the dust collector, and is introduced into the tail gas recovery system through the first outlet through the gas outlet channel, the dust is removed in the dust collector and is introduced into the automatic ash unloading measuring device through the second outlet;

[0022] When the amount of ash reaches the full bin preset position, the level gauge generates a full bin signal, and the timer records and displays the first dust accumulation time T i ;

[0023] The upper valve of the pneumatic gate valve is closed, and the lower valve of the pneumatic gate valve is opened to start unloading ash.

[0024] After completing the unloading of ash once, the above steps are repeated.

[0025] Preferably, when the amount of ash reaches the full bin preset position, the level gauge sends a full bin signal, and the control unit sends a control instruction to control the opening of the lower valve of the pneumatic gate valve and the closing of the upper valve of the pneumatic gate valve to unload ash; when the level gauge measures that the level reaches the empty bin preset position, i.e. after the unloading of ash is completed, an empty bin signal is sent, and the control unit receives the empty bin signal and sends a control instruction to close the lower valve of the pneumatic gate valve and open the upper valve of the pneumatic gate valve to perform the next dust accumulation and unloading action.

[0026] Preferably, the method further comprises,

[0027] An input signal is obtained, and a dust removal efficiency is calculated; the input signal includes the industrial flue gas concentration C measured by a dust concentration measuring instrument, the industrial flue gas flow rate v, the flue gas pipeline cross-sectional area S, the first dust accumulation time T displayed by the timer, the predicted density of the ash pile ρ, the first dust accumulation volume V, and the total number of unloading n. i The dust concentration measuring instrument has a remote data transmission function and is installed on the flue gas pipeline at the front end of the dust collector inlet to detect the initial dust concentration and provide data for the calculation of the dust removal efficiency.

[0028] Preferably, when the dust removal efficiency is greater than a design threshold value and less than 100%, the prompt module prompts that the state is normal; when the dust removal efficiency is less than the design threshold value, the prompt module prompts that the dust concentration measuring instrument needs to be calibrated and maintained or the dust removal efficiency of the dust collector is not up to standard; when the dust removal efficiency is greater than 100%, the prompt module prompts that the dust concentration measuring instrument needs to be calibrated and maintained.

[0029] Further, the calculation formula of the dust removal efficiency is:

[0030]

[0031] Wherein, η is the dust removal efficiency; M1 is the initial ash amount of the flue gas per unit time; M2 is the dust removal ash amount per unit time.

[0032] Further, the calculation formula of the dust removal efficiency is:

[0033]

[0034] Wherein, V is the first accumulated dust volume, n is the total dust discharge times, p is the density of the predicted dust pile, S is the cross-sectional area of the flue gas pipeline, v is the flue gas flow rate, T i is the first accumulated dust time, C is the concentration measured by the dust concentration measuring instrument;

[0035] The calculation formula of the dust removal efficiency is stored in the dust removal efficiency calculation module.

[0036] In the present application, if the industrial flue gas is high-temperature flue gas, the device and the attached connecting pipeline need to be insulated to prevent condensation.

[0037] In the present application, the industrial flue gas includes but is not limited to non-ferrous, metallurgical, and power industries, and the dust collector includes but is not limited to electrostatic precipitators and bag dust collectors.

[0038] The present application has the advantages of providing a new industrial flue gas dust collector dust removal efficiency measuring device and a method for measuring the dust removal efficiency of the industrial flue gas dust collector based on the device, which can accurately measure the dust removal efficiency of the industrial flue gas dust collector, quantitatively test the dust removal effect, prompt the reasonable instrument equipment maintenance time, and strengthen the sealing of the flue gas dust discharge system to prevent the leakage of harmful industrial flue gas during the dust discharge process, which is of great significance for industrial flue gas purification. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic diagram of the whole industrial flue gas dust collector dust removal efficiency measuring device.

[0040] Figure 2 is a schematic diagram of the automatic dust discharge measuring device.

[0041] Figure 3 is a schematic diagram of the warning component module connection.

[0042] Figure 4 is a schematic diagram of the control principle of the second valve.

[0043] Number: 1, dust concentration measuring instrument; 2, automatic dust discharge measuring device; 2-1, first valve; 2-2a, upper valve of pneumatic plug valve; 2-2b, lower valve of pneumatic plug valve; 2-3, level meter; 210, warning component; 211, calculation module; 212, comparison module; 213, prompting module; 230, control unit; 2-4, timer; 2-5, vertical pipeline; 3, post-processing device; 4, dust collector; 5, tail gas recovery system. DETAILED DESCRIPTION

[0044] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] The first aspect of the present application provides a device for measuring the dust removal efficiency of an industrial flue gas dust remover, referring to Figure 1 , comprising a dust remover 4, the dust remover 4 comprising an inlet, a first outlet, a second outlet, the device further comprising:

[0047] A dust concentration measuring instrument 1 is arranged in the flue gas passage in front of the inlet of the dust remover 4, and is used to measure the initial concentration of dust in the flue gas;

[0048] An automatic ash unloading measuring device 2, referring to Figure 2 , is arranged on the dust removal passage of the dust remover 4, and comprises a vertically arranged pipeline 2-5, a first valve 2-1, a pair of second valves arranged in sequence from top to bottom on the pipeline 2-5, a material level meter 2-3 and a timer 2-4 arranged between the pair of second valves;

[0049] The first outlet of the dust remover 4 is connected to the tail gas recovery system 5 through the gas outlet passage, and the second outlet is connected to the automatic ash unloading measuring device 2 through the dust removal passage; the dust outlet of the automatic ash unloading measuring device 2 is communicated with the post-processing process device 3.

[0050] Preferably, the material level meter 2-3 is electrically connected with the pair of second valves through a control unit 230 to control the opening and closing of the pair of second valves.

[0051] Preferably, the first valve 2-1 is a manual gate valve, which is opened and closed manually; the second valve is a pneumatic double gate valve, which is opened and closed by the level meter 2-3 and the control unit 230.

[0052] Preferably, the pneumatic double gate valve comprises a pneumatic upper gate valve 2-2a and a pneumatic lower gate valve 2-2b, and the level meter 2-3 is located between the pneumatic upper gate valve 2-2a and the pneumatic lower gate valve 2-2b.

[0053] Preferably, the level meter 2-3 sends a control signal to control the opening and closing of the pneumatic upper gate valve 2-2a and the pneumatic lower gate valve 2-2b when the dust level reaches a preset position; and the level meter 2-3 is provided with at least one.

[0054] Preferably, referring to Figure 3 , the device is provided with a warning component 210, which comprises:

[0055] A dedusting efficiency calculation module 211 is configured to receive an input signal, calculate the dedusting efficiency, and output a dedusting efficiency signal;

[0056] A comparison module 212 is configured to receive the dedusting efficiency signal sent by the dedusting efficiency calculation module 211, compare the dedusting efficiency signal with a design threshold and a full efficiency value, and output a comparison result signal;

[0057] A prompt module 213 is configured to receive the comparison result signal output by the comparison module 212, and output prompt information according to the received comparison result signal.

[0058] In another aspect of the present application, a method for measuring the dedusting efficiency of an industrial flue gas deduster based on the device is provided, which comprises the following steps:

[0059] The pneumatic lower gate valve 2-2b is closed, the manual gate valve and the pneumatic upper gate valve 2-2a are opened, and the timer 2-4 starts timing at the same time;

[0060] Industrial flue gas is introduced into the flue gas pipeline, flows through the deduster 4, and then is introduced into the tail gas recovery system 5 through the first outlet and the gas passage, and the dust is removed in the deduster 4 and introduced into the automatic dust unloading measuring device 2 through the second outlet;

[0061] When the amount of dust reaches the preset position of full bin, the full bin signal is generated by the level meter 2-4, and the timer 2-4 records and displays the first dust accumulation time T i ;

[0062] The pneumatic upper gate valve 2-2a is closed, and the pneumatic lower gate valve 2-2b is opened to start unloading dust;

[0063] After completing the unloading of dust once, the above steps are repeated.

[0064] Preferably, referring to Figure 4 When the amount of ash reaches the full bin preset position, the material level meter 2-3 sends a full bin signal, and the control unit 230 sends a control instruction to control the opening of the lower valve 2-2b of the pneumatic insertion plate valve and the closing of the upper valve 2-2a of the pneumatic insertion plate valve to unload the ash; When the material level meter 2-3 measures that the material level reaches the empty bin preset position, i.e. after the unloading of the ash is completed, an empty bin signal is sent, and the control unit 230 receives the empty bin signal and sends a control instruction to close the lower valve 2-2b of the pneumatic insertion plate valve and open the upper valve 2-2a of the pneumatic insertion plate valve to perform the next ash accumulation and unloading action.

[0065] Preferably, the method further comprises,

[0066] The input signal is obtained, and the dust removal efficiency is calculated; the input signal includes the industrial flue gas concentration C measured by the dust concentration measuring instrument 1, the industrial flue gas flow rate v, the flue gas pipeline cross-sectional area S, and the once-accumulation time T displayed by the timer 2-4 i , the predicted density of the ash pile ρ, the once-accumulation volume V, and the total unloading times n.

[0067] Preferably, when the dust removal efficiency is greater than the design threshold value and less than 100%, the prompt module 213 prompts that the state is normal; when the dust removal efficiency is less than the design threshold value, the prompt module 213 prompts that “the dust concentration measuring instrument 1 needs to be calibrated and maintained or the dust removal efficiency of the dust remover is not up to standard”; when the dust removal efficiency is greater than 100%, the prompt module 213 prompts that “the dust concentration measuring instrument 1 needs to be calibrated and maintained”.

[0068] Further, the calculation formula of the dust removal efficiency is:

[0069]

[0070] Wherein, η is the dust removal efficiency; M1 is the initial ash amount of the flue gas per unit time; M2 is the dust removal ash amount per unit time.

[0071] Further, the calculation formula of the dust removal efficiency is:

[0072]

[0073] Wherein, V is the once-accumulation volume, n is the total unloading times, ρ is the predicted density of the ash pile, S is the flue gas pipeline cross-sectional area, v is the flue gas flow rate, T i is the once-accumulation time, and C is the concentration measured by the dust concentration measuring instrument 1.

[0074] The calculation formula of the dust removal efficiency is stored in the dust removal efficiency calculation module 211.

[0075] Embodiment

[0076] The application provides a device for measuring dust removal efficiency of an industrial flue gas dust remover, comprising a dust concentration measuring instrument 1, an automatic ash unloading measuring device 2, a post-processing process device 3 and a dust remover 4; the dust concentration measuring instrument 1 is located at the front end of the inlet of the dust remover 4 and is used for measuring the initial dust concentration; the dust in the flue gas is removed in the dust remover 4; the first outlet of the dust remover 4 is connected to a tail gas recovery system 5 through an air outlet channel, and the second outlet is connected to the automatic ash unloading measuring device 2 through a dust outlet channel; the automatic ash unloading measuring device 2 comprises a manual plug valve, a pneumatic double plug valve, a material level meter 2-3, a timer 2-4 and a vertical pipeline 2-5; the manual plug valve 2-1 is used for maintenance; the material level meter 2-3 is used for detecting whether the dust removal ash reaches the calibrated volume; the opening and closing state of the pneumatic double plug valve 2-2 is controlled by the signal of the material level meter 2-3; the dust removal ash is automatically unloaded and the dust removal ash amount is measured by the material level signal interlocking control of the automatic ash unloading measuring device 2, and finally the dust removal ash is transported to the post-processing process device 3. The dust concentration measuring instrument 1 is a commercially available instrument, has a remote data transmission function, is installed on the pipeline at the front end of the inlet of the dust remover 4, is used for detecting the initial dust concentration and provides data for the calculation of the dust removal efficiency. The post-processing process device 3 comprises but is not limited to a dust storage bin, a water seal slag pool and a solid waste treatment plant and the like, and the unloaded dust is recycled. If the industrial flue gas is high-temperature flue gas, the device and the attached connecting pipeline need to be insulated to prevent dewing. The measurement period should be selected under the condition that the working condition is stable, the data fluctuation is small in a short time, the measurement result is universal and representative. The industrial flue gas comprises but is not limited to non-ferrous, metallurgical and power industries and the like, and the dust remover comprises but is not limited to an electrostatic dust remover and a bag dust remover and the like.

[0077] As Figure 2As shown, the automatic ash unloading measuring device 2 comprises a manual gate valve, a pneumatic double gate valve, a level meter 2-3, a timer 2-4 and a vertical pipeline 2-5. Among them, the manual gate valve, the pneumatic double gate valve, the level meter 2-3 and the timer 2-4 are installed on the vertical pipeline 2-5, the upper end of the automatic ash unloading measuring device 2 is connected with the ash unloading port of the dust collector 4, and the lower end is connected with the post-processing process device 3. Among them, the manual gate valve is kept open in the normal operation state of the system, and is closed in emergency situations such as failure and maintenance. Among them, the pneumatic double gate valve comprises a pneumatic upper gate valve 2-2a and a pneumatic lower gate valve 2-2b, and the opening and closing state thereof is controlled by the signal of the level meter 2-3. Among them, the level meter 2-3 is located between the pneumatic upper gate valve 2-2a and the pneumatic lower gate valve 2-2b, and the arrangement position can be determined according to the volume of the theoretically calculated ash and the pipeline size, so that the volume between the level meter 2-3 and the pneumatic lower gate valve 2-2b satisfies the condition that the theoretically calculated ash is equal to or greater than the single cycle time. The level meter 2-3 is a commercially available instrument, and its types include but are not limited to laser level meter, radar level meter, mechanical level meter, etc. Among them, the timer 2-4 is a commercially available instrument.

[0078] The method for measuring the dust removal efficiency of an industrial flue gas dust collector based on the device in the embodiment comprises the following steps:

[0079] (1) The industrial flue gas enters the dust collector 4 through the dust concentration measuring instrument 1. According to the concentration and flow rate shown by the dust concentration measuring instrument 1 under the stable state, combined with the cross-sectional area of the pipeline, the initial ash amount M1 of the flue gas per unit time is calculated. Among them, M1=SvC, wherein S is the cross-sectional area of the flue gas pipeline, v is the flow rate shown by the existing equipment (such as the flow rate measuring instrument installed on the flue gas pipeline) when the flue gas is introduced, and C is the concentration measured by the dust concentration measuring instrument 1.

[0080] (2) The automatic ash unloading measuring device 2 is automatically unloaded by adopting the level signal interlocking control, wherein the ash unloading process comprises the following steps:

[0081] ①The manual gate valve 2-1 is kept open in the normal operation state of the system, and the initial condition is that the pneumatic upper gate valve 2-2a and the pneumatic lower gate valve 2-2b are both in the closed state, the space volume surrounded by the full-batch preset level position of the level meter 2-3, the pneumatic lower gate valve 2-2b and the vertical pipeline 2-5 is the first accumulated ash volume V;

[0082] ②The pneumatic upper gate valve 2-2a is opened, and at the same time, the timer 2-4 starts timing;

[0083] ③When the material level meter 2-4 has a feedback signal, i.e. the fly ash amount reaches V, the upper valve 2-2a of the pneumatic plug valve is closed, and the timer 2-4 records and displays the time T i ;

[0084] ④The lower valve 2-2b of the pneumatic plug valve is opened to start the fly ash unloading, and this state lasts for a certain set value time t, so that the fly ash between the pneumatic double plug valves 2-2 is completely emptied, and one fly ash unloading is completed, wherein the set value t is determined by the actual working condition of the industrial flue gas dust removal, and the value interval is 0.1-3 min, and the actual working condition of the industrial flue gas dust removal includes but is not limited to the flue gas amount, the flue gas temperature, the dust content, the pipeline size and the fly ash properties and the like;

[0085] ⑤The steps ②-④ are repeated to realize the process circulation.

[0086] (3) The single fly ash unloading amount is constant V, the counting data of the timer 2-4 is the fly ash unloading times n, and the sum of the time T i displayed by the timer 2-4 in each fly ash unloading is the time required for the cumulative fly ash volume to reach nV, and the fly ash quality is calculated in combination with the pre-measured fly ash bulk density, the fly ash amount M2 per unit time is calculated by the fly ash unloading times and the required time. Wherein, V is the fly ash accumulation volume, n is the total fly ash unloading times, T i is the fly ash accumulation time recorded by the timer 2-4, and ρ is the measured fly ash bulk density, which is a known quantity obtained by pre-measuring the fly ash pile unloaded from the dust collector.

[0087] (4) The ratio of the fly ash amount M2 per unit time to the initial fly ash amount M1 per unit time is the industrial flue gas dust collector dust removal efficiency. When the dust removal efficiency is greater than the design value of the dust collector dust removal efficiency and less than 100%, it is prompted that “the state is normal”; when the dust removal efficiency is less than the design value of the dust collector dust removal efficiency, it is prompted that “the dust concentration measuring instrument 1 needs to be calibrated and maintained or the dust collector dust removal efficiency is not up to standard”; when the dust removal efficiency is greater than 100%, it is prompted that “the dust concentration measuring instrument 1 needs to be calibrated and maintained”.

[0088] Referring to the figures, the present application provides a method for measuring the dust removal efficiency of an industrial flue gas dust collector based on the device, which comprises the following steps:

[0089] The lower valve 2-2b of the pneumatic plug valve is closed, the manual plug valve and the upper valve 2-2a of the pneumatic plug valve are opened, and the timer 2-4 starts timing at the same time;

[0090] The industrial flue gas is introduced into the flue gas pipeline, flows through the dust collector 4, is introduced into the tail gas recovery system 5 through the gas outlet channel through the first outlet, the dust is removed in the dust collector 4 and is introduced into the automatic fly ash unloading measuring device 2 through the second outlet;

[0091] When the ash amount reaches the full bin preset position, the material level meter 2-3 sends a full bin signal, and the timer 2-4 records and displays the ash accumulation time T i When the material level meter 2-3 measures that the material level reaches the empty bin preset position, i.e. after the ash removal is completed, an empty bin signal is sent, the control unit 230 receives the empty bin signal and sends a control instruction to close the pneumatic insert valve lower valve 2-2b and open the pneumatic insert valve upper valve 2-2a, and the next ash accumulation and removal operation is performed.

[0092] The calculation module 211 receives the input signal and calculates the dust removal efficiency, and sends the dust removal efficiency to the comparison module 212. The comparison module 212 compares the calculated dust removal efficiency with the preset design threshold and the full efficiency value (i.e. 100%) respectively. When the dust removal efficiency is greater than the design threshold and less than 100%, the prompt module 213 prompts that the state is normal. When the dust removal efficiency is less than the design threshold, the prompt module 213 prompts that “the dust concentration measuring instrument 1 needs to be calibrated and maintained or the dust removal efficiency of the dust remover is not up to standard”. When the dust removal efficiency is greater than 100%, the prompt module 213 prompts that “the dust concentration measuring instrument 1 needs to be calibrated and maintained”. Further, the prompt module 213 can prompt in the form of image or voice.

[0093] In the description of the present specification, the description of the terms “one embodiment”, “some embodiments”, “exemplary embodiment”, “example”, “specific example”, or “some examples” means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0094] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A device for measuring the dust removal efficiency of an industrial flue gas dust remover, comprising a dust remover (4) comprising an inlet, a first outlet, a second outlet, characterized in that, Also include: Dust concentration measuring instrument (1), set in the flue gas channel before the inlet of dust collector (4), for measuring the initial concentration of dust in flue gas; Automatic ash unloading measuring device (2) is arranged on the dust outlet channel of dust collector (4), for measuring the dust removal efficiency of dust collector (4), which includes vertically arranged pipeline (2-5), first valve (2-1) is arranged on the pipeline (2-5) from top to bottom, a pair of second valves, the pair of second valves includes pneumatic gate valve upper valve (2-2a) and pneumatic gate valve lower valve (2-2b), level meter (2-3) and timer (2-4) are arranged between the two; Wherein, the dust removal efficiency is the ratio of dust removal ash quantity per unit time and initial ash quantity per unit time of flue gas, the unit time dust removal ash quantity is calculated by the total ash quantity accepted by pneumatic gate valve lower valve (2-2b) in unit time; The method for measuring the dust removal efficiency includes closing pneumatic gate valve lower valve (2-2b), opening manual gate valve and pneumatic gate valve upper valve (2-2a), and timer (2-4) starts timing at the same time; Industrial flue gas is introduced into the flue gas pipeline, flows through dust collector (4), and then is introduced into tail gas recovery system (5) through the first outlet and the gas outlet channel, dust is removed in dust collector (4) and is introduced into automatic ash unloading measuring device (2) through the second outlet; When the ash amount reaches the full bin preset position, the material level meter (2-3) generates a full bin signal, and the timer (2-4) records and displays the once-ash accumulation time T i ; Close pneumatic gate valve upper valve (2-2a) and open pneumatic gate valve lower valve (2-2b) to start ash unloading; After completing the ash unloading once, repeat the above steps; The first outlet of dust collector (4) is connected to tail gas recovery system (5) through the gas outlet channel, the second outlet is connected to automatic ash unloading measuring device (2) through the dust outlet channel, and the dust outlet of automatic ash unloading measuring device (2) is connected to post treatment device (3).

2. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 1, characterized in that, The level meter (2-3) is electrically connected with the pair of second valves through the control unit (230) to control the opening and closing of the pair of second valves.

3. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 1, characterized in that, The first valve (2-1) is a manual gate valve, which is opened and closed manually; the second valve is a pneumatic double gate valve, which is opened and closed by the level meter (2-3) and the control unit (230).

4. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 3, characterized in that, The level meter (2-3) sends a control signal to control the opening and closing of pneumatic gate valve upper valve (2-2a) and pneumatic gate valve lower valve (2-2b) when the dust level reaches the preset position; the level meter (2-3) is provided with at least one.

5. The device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 1, characterized in that, Warning component (210) is arranged in the device, which includes: Dust removal efficiency calculation module (211) for receiving input signal, calculating dust removal efficiency and outputting dust removal efficiency signal; Comparison module (212) for receiving dust removal efficiency signal sent by dust removal efficiency calculation module (211), comparing with design threshold and full efficiency value, and outputting comparison result signal; Prompt module (213) for receiving comparison result signal output by comparison module (212), and outputting prompt information according to the received comparison result signal.

6. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 5, characterized in that, When the ash amount reaches the full bin preset position, the material level meter (2-3) sends a full bin signal, and the control unit (230) sends a control instruction to control the opening of the pneumatic plug valve lower valve (2-2b) and the closing of the pneumatic plug valve upper valve (2-2a) to unload the ash; when the material level meter (2-3) measures that the material level reaches the empty bin preset position, i.e. after the unloading of the ash is completed, an empty bin signal is sent, the control unit (230) receives the empty bin signal and sends a control instruction to close the pneumatic plug valve lower valve (2-2b) and open the pneumatic plug valve upper valve (2-2a) to perform the next ash accumulation and unloading action.

7. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 6, characterized in that, The method further comprises, The input signal includes the industrial flue gas concentration C, the industrial flue gas flow rate v, the flue gas pipeline cross-sectional area S, and the once dust deposition time T displayed by the timer (2-4) measured by the dust concentration measuring instrument (1) i , the predicted density of the ash pile ρ, the once dust deposition volume V, and the total ash unloading times n.

8. The device for measuring the dust removal efficiency of an industrial flue gas dust collector according to claim 7, characterized in that, When the dust removal efficiency is greater than the design threshold value and less than 100%, the prompt module (213) prompts that the state is normal; when the dust removal efficiency is less than the design threshold value, the prompt module (213) prompts that "the dust concentration measuring instrument (1) needs to be calibrated and maintained or the dust removal efficiency of the dust collector is not up to standard"; when the dust removal efficiency is greater than 100%, the prompt module (213) prompts that "the dust concentration measuring instrument (1) needs to be calibrated and maintained".

9. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 8, characterized in that, The calculation formula of the dust removal efficiency is: Wherein, η is the dust removal efficiency; M1 is the initial ash amount of the flue gas per unit time; M2 is the dust removal ash amount per unit time.

10. A device for measuring the dust removal efficiency of an industrial flue gas dust remover according to claim 9, characterized in that, The calculation formula of the dust removal efficiency is: where V is the volume of the accumulated dust, n is the total number of times of dust discharge, p is the density of the dust pile, S is the cross-sectional area of the flue gas pipeline, v is the flue gas flow rate, T i is the time of the accumulated dust, and C is the concentration measured by the dust concentration measuring instrument (1). The calculation formula of the dust removal efficiency is stored in the dust removal efficiency calculation module (211). The calculation formula of the dust removal efficiency is: The calculation formula of the dust removal efficiency is stored in the dust removal efficiency calculation module (211).

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