Negative pressure filtering type dust removal system and method suitable for humid environment

Abstract

The invention discloses a negative-pressure filtering type dust removal system and method suitable for a humid environment, and relates to the technical field of negative-pressure filtering type dust removal, and the negative-pressure filtering type dust removal system suitable for the humid environment is characterized in that a negative-pressure filtering container is arranged, and a filtering chamber is arranged in the negative-pressure filtering container; the negative pressure filtering container comprises an inlet pipeline and an outlet pipeline communicated with the inlet pipeline, and the inlet pipeline and the outlet pipeline are both communicated with the filtering chamber; a vent valve is connected in the inlet pipeline, and a fan is connected in the outlet pipeline; a flow obtaining element and a heater are further connected into the inlet pipeline. Differential pressure sensor sets are arranged in the inlet pipeline and the outlet channel. The filter cartridge is arranged in the filter chamber; the rotary driving assembly is connected with the filter cartridge and is used for driving the filter cartridge to rotate; the control assembly is connected with the negative pressure filtering container, and the control assembly comprises a master control instrument and a data control instrument connected with the master control instrument; wherein the master controller is used for judging whether the resistance state of the filter chamber is a high-resistance state or not so as to adjust the rotating speed of the filter cartridge to be an expected rotating speed.

Description

Technical Field

[0001] The present application relates to the technical field of negative pressure filtration dust removal, and in particular to a negative pressure filtration dust removal system and method suitable for humid environments. Background Art

[0002] Industrial dust hazards are one of the main hazards that restrict industrial safety production. Its hazards are mainly reflected in the following three aspects, namely, causing dust explosions, inducing pneumoconiosis, and causing environmental pollution. For example, a large amount of dust is generated in the production process of coal mines, especially on the excavation working face. Due to the poor ventilation capacity of the tunnel, a large amount of respirable dust will accumulate, causing coal mine dust disasters.

[0003] In a humid production environment, traditional filtering and dust removal systems face some challenges. When using a filter cartridge dust collector for dust removal, dust can easily stick to the surface of the filter cartridge and is difficult to remove, causing clogging and damage to the filter element and secondary pollution. If it is not replaced in time, the dust removal efficiency of the filtering and dust removal system will be greatly reduced. In addition, in the existing control of the filter cartridge for rotating dust cleaning and dust removal, if the filter cartridge rotates too slowly, the dust may stay in the filter cartridge for too long, affecting the separation and removal of the dust, resulting in unsatisfactory dust removal effects. It may also cause a lot of dust to accumulate in the filter cartridge, increasing the risk of clogging, thereby affecting the continuous operation of the equipment. If the filter cartridge rotates too fast, it will increase the wear and energy consumption of the equipment, which may shorten the life of the equipment and increase maintenance costs. Based on the current background of industrial dust prevention and control, in order to solve the above problems, the present application proposes a negative pressure filtering dust removal system and method suitable for humid environments. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to propose a negative pressure filtering dust removal system and method suitable for humid environments, wherein the dust removal system can not only achieve excellent dust removal and cleaning effects in humid environments, but also avoid filter element clogging and secondary pollution.

[0005] The present application provides a negative pressure filtration dust removal system suitable for a humid environment, comprising:

[0006] A negative pressure filtration container, wherein the negative pressure filtration container has a filtration chamber;

[0007] The negative pressure filtration container comprises an inlet pipe and an outlet pipe connected to the inlet pipe, wherein the inlet pipe and the outlet pipe are both connected to the filter chamber; a vent valve is connected to the inlet pipe, and a fan is connected to the outlet pipe; a flow acquisition element and a heater are also connected to the inlet pipe, and a differential pressure sensor group is provided in the inlet pipe and the outlet channel;

[0008] A filter cartridge, wherein the filter cartridge is disposed in the filter chamber;

[0009] A rotation drive assembly, the rotation drive assembly is connected to the filter cartridge and is used to drive the filter cartridge to rotate;

[0010] A control component is connected to the negative pressure filter container, and the control component includes a general controller and a data controller connected to the general controller; wherein the general controller is used to determine whether the resistance state of the filter chamber is a high resistance state, so as to adjust the rotation speed of the filter cartridge.

[0011] The negative pressure filtering dust removal system suitable for a humid environment provided in the present application also includes: a brushing assembly, arranged on one side of the filter cartridge, for brushing dust on the filter cartridge;

[0012] A first pulse jet cleaning subsystem, the first pulse jet cleaning subsystem comprising a first jet pipe, a first pulse valve, a first air storage tank and a first nozzle, wherein the first jet pipe is connected to the first pulse valve, the first air storage tank and the first nozzle respectively, and the first pulse jet cleaning subsystem is connected to the negative pressure filter container;

[0013] The second pulse jet cleaning subsystem includes a second jet pipe and a second pulse valve, the second jet pipe is connected to the second pulse valve, and the second pulse jet cleaning subsystem is connected to the negative pressure filter container.

[0014] The negative pressure filtering dust removal system suitable for humid environments provided in the present application also includes an ash unloading subsystem, which includes an ash unloading valve and an ash unloading chamber, and the ash unloading chamber is connected to the ash unloading valve; the ash unloading subsystem is arranged at the bottom of the negative pressure filtering container, and is configured to remove the dust after the dust dropped from the filter cartridge reaches a predetermined weight.

[0015] The present application also provides a negative pressure filtration dust removal method suitable for a humid environment, comprising:

[0016] The pressure difference between the inlet pipe of the negative pressure filtration container and the outlet pipe of the negative pressure filtration container is obtained by a pressure difference sensor group;

[0017] The flow rate of the dust-laden airflow in the filter chamber is obtained by a flow acquisition element;

[0018] According to the flow rate of the dust-laden airflow in the filter chamber and the pressure difference between the inlet pipe and the outlet pipe, it is determined whether the resistance state of the filter chamber is a high resistance state;

[0019] If it is determined that the resistance state of the filter chamber is a high resistance state, the rotary drive assembly is controlled to drive the filter cartridge to rotate at a desired rotation speed.

[0020] The present application provides a negative pressure filtration dust removal method suitable for a humid environment, and further includes: monitoring the weight m of dust dropped by the filter cartridge in the dust unloading chamber; n , set the rated weight of dust in the dust unloading chamber to M δ , when m n ≥M δ At the same time, the dust in the dust unloading room is unloaded.

[0021] The present application provides a negative pressure filtering dust removal method suitable for a humid environment, further comprising: increasing the temperature of the dust-laden airflow entering the filter chamber by ΔT based on a heater, wherein the relative humidity RH of the dust-laden airflow in the inlet duct is lower than a predetermined value.

[0022] The present application provides a negative pressure filtration dust removal method suitable for a humid environment, and also includes: closing the ventilation valve and opening a first pulse jet cleaning subsystem, wherein the first pulse jet cleaning subsystem sprays the filter cartridge according to a set amount of spray air.

[0023] In summary, this application mainly has the following beneficial effects:

[0024] Beneficial effects of the present invention:

[0025] The negative pressure filtration dust removal system suitable for humid environments provided by the present application is connected to the filter cartridge drive by means of a rotary drive assembly and a brush assembly. In a humid environment, the dust around the filter cartridge tends to stick and clump. When the filter chamber reaches a certain resistance, the rotary drive assembly will drive the filter cartridge to rotate, and use centrifugal force to discharge part of the dust on the filter material around the filter cartridge. During the rotation process, the brush assembly will also brush off the dust adhering to the surface of the filter cartridge, thereby achieving the best dust cleaning effect.

[0026] The negative pressure filtration dust removal method provided by the present application is suitable for humid environments. According to the flow rate of the dust-laden airflow and the pressure difference between the inlet pipe and the outlet pipe, it is determined whether the resistance state of the filter chamber is a high resistance state; if it is determined that the resistance state of the filter chamber is a high resistance state, the filter cartridge is controlled to rotate at a desired speed. The filter cartridge rotates at the desired speed, and centrifugal force is used to discharge part of the dust on the filter material around the filter cartridge. During the rotation process, the brushing component will also brush off the dust adhering to the surface of the filter cartridge, thereby achieving the best dust cleaning effect.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a structural schematic diagram of a negative pressure filtering dust removal system suitable for a humid environment provided in an embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the filter cartridge structure in a negative pressure filtering dust removal system suitable for a humid environment provided in an embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the truncated cone lining structure in a negative pressure filtering dust removal system suitable for humid environments provided in an embodiment of the present application.

[0032] Figure 4 It is a structural schematic diagram of the connection between the filter cartridge and the rotary drive assembly in a negative pressure filtering dust removal system suitable for humid environments provided in an embodiment of the present application.

[0033] Figure 5 It is a structural schematic diagram of a negative pressure filtering dust removal system suitable for humid environments provided in another embodiment of the present application.

[0034] Reference numerals:

[0035] 1. Inlet pipe; 2. Ventilation valve; 3. Temperature and humidity sensor; 4. Flow meter; 5. Pressure difference sensor group; 6. Heater; 7. Filter cartridge; 8. Filter material; 9. Cone lining filter element; 10. Cylindrical roller bearing; 11. Flower plate; 12. Cleaning brush; 13. Fixed pipe; 14. Rotating shaft; 15. Motor; 16A. First nozzle; 17A. First blowing pipe; 17B. Second blowing pipe; 18A. First pulse valve; 18B. Second pulse valve; 19. First air storage tank; 20. First pressure sensor; 21. Weight sensor; 22. Ash discharge valve; 23. Ash discharge chamber; 24. Filter chamber; 25. Cleaning chamber; 26. Main controller; 27. Fan; 28. Outlet pipe; 29. ​​Data controller. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0038] It should be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0039] It should be understood that, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same items or similar items with substantially the same functions and effects. For example, the first groove and the second groove are only used to distinguish different grooves, and their order is not limited. Those skilled in the art can understand that the words "first", "second", etc. do not limit the quantity and execution order, and the words "first", "second", etc. do not necessarily limit them to be different.

[0040] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0041] The inventors of the present application have discovered that in a humid environment, moisture in the environment will enter the filtration dust removal system in different forms along with the dust-laden airflow, causing the filtration resistance of the dust removal system to increase faster and making cleaning difficult.

[0042] In view of this, refer to Figure 1-Figure 5 , the present application provides a negative pressure filtering dust removal system suitable for a humid environment, comprising:

[0043] A negative pressure filtration container, wherein the negative pressure filtration container has a filtration chamber 24;

[0044] The negative pressure filtration container comprises an inlet pipe 1 and an outlet pipe 28 connected to the inlet pipe 1, wherein the inlet pipe 1 and the outlet pipe 28 are both connected to the filter chamber 24; a vent valve 2 for controlling the entry of gas is arranged in the inlet pipe 1, and a fan 27 is arranged in the outlet pipe 28; a flow acquisition element and a pressure difference sensor group 5 are also arranged between the inlet pipe 1 and the outlet pipe 28; the flow acquisition element can be a flow meter 4 or other components capable of achieving equivalent functions;

[0045] The filter cartridge 7 is arranged in the filter chamber 24, and the dust-laden airflow flows from the inlet pipe 1 into the filter chamber 24, and flows through the filter cartridge 7 to the outlet pipe 28;

[0046] A rotation drive assembly is connected to the filter cartridge 7 and is used to drive the filter cartridge 7 to rotate; the rotation drive assembly may be a motor 15, or other components capable of achieving equivalent functions;

[0047] A brushing assembly, arranged on one side of the filter cartridge 7, for brushing away dust on the filter cartridge 7;

[0048] A control component, the control component is connected to the negative pressure filtration container, and the control component includes a main controller and a data controller connected to the main controller;

[0049] The main controller is used to determine whether the resistance state of the filter chamber is a high resistance state according to the flow rate of the dust-laden airflow and the pressure difference between the inlet pipe and the outlet pipe, so as to adjust the rotation speed of the filter cartridge to the desired rotation speed.

[0050] In a humid environment, dust around the filter cartridge 7 tends to stick and clump. When the filter chamber 24 reaches a certain resistance, the rotary drive assembly will drive the filter cartridge 7 to rotate, and use centrifugal force to discharge part of the dust on the filter material 8 provided on the side of the filter cartridge 7. During the rotation process, the brushing assembly will also brush off the dust adhering to the surface of the filter cartridge 7, thereby achieving the best cleaning effect.

[0051] In this embodiment, a temperature and humidity sensor 3 can be provided on the inner wall of the inlet pipe 1 by bolts or other means to monitor the temperature and relative humidity at the inlet pipe 1. In order to facilitate monitoring of the flow rate of the dust-laden airflow through the inlet pipe 1, a flow meter 4 can also be provided in the inlet pipe 1 by bolts or other means. A pressure difference sensor group 5 can be provided between the inlet pipe 1 and the outlet pipe 28, and the pressure difference sensor group 5 includes sensors respectively provided at the inlet pipe 1 and the outlet pipe 28; it is used to monitor the pressure difference (i.e., pressure change) at the inlet and outlet of the filter chamber 24 of the dust removal system. In addition, the inlet pipe 1 can also be provided with a heater 6 (which can be purchased on the market), which increases the temperature by the heater 6 and thereby reduces the relative humidity of the filter chamber 24, thereby ensuring that the relative humidity in the filter chamber 24 is always lower than a preset threshold value (such as 70%).

[0052] It can be understood that the heating temperature required by the heater 6 can be set according to the relative humidity in the filter chamber 24, and the relative humidity of the filter chamber 24 can be further controlled by controlling the temperature of the filter chamber 24.

[0053] See also Figure 1 As shown, the negative pressure filtering dust removal system may include a cleaning chamber 25, a filtering chamber 24 and an ash unloading chamber 23 arranged from top to bottom.

[0054] In addition, it can also include a first pulse jet cleaning subsystem and a brushing assembly arranged in the cleaning chamber 25, wherein the first pulse jet cleaning subsystem can be arranged above the filter cartridge 7, and is used to spray gas to the filter cartridge 7, and the first pulse jet cleaning subsystem includes a first spray pipe 17A, a first nozzle 16A arranged on the first spray pipe 17A, a first pulse valve 18A arranged on the front side of the first spray pipe 17A, a first air storage tank 19A connected to the first spray pipe 17A for air supply, and a first pressure sensor 20A located inside the first air storage tank 19A. The first nozzle 16A can be placed vertically like the filter cartridge 7, each first nozzle 16A is in a straight line with the corresponding filter cartridge 7, and the distance between the first nozzle 16A and the filter cartridge 7 can be 2-3cm, and the object sprayed by the first nozzle 16A of the cleaning chamber 25 is compressed air. The first nozzle 16A sprays the compressed air evenly around the filter cartridge 7 and the truncated cone lining filter element 9 at a certain speed, thereby improving the cleaning efficiency of the cleaning chamber.

[0055] The brushing assembly is arranged on one side of the filter cartridge 7 and is used for brushing the dust on the filter cartridge 7 . The brushing assembly includes a fixing pipe 13 fixed on the ceiling and a cleaning brush 12 connected to the fixing pipe 13 .

[0056] A conical lining filter element 9 is provided in the filter cartridge 7, and the bottom surface of the conical lining filter element 9 is sleeved on the bottom surface of the filter cartridge 7 to increase the filtering area of ​​the filter material 8. The first pulse jet cleaning subsystem can not only better spray the compressed air sprayed from the first nozzle 16A around the filter cartridge 7, but also clean the conical lining filter element 9, thereby further improving the cleaning efficiency.

[0057] In addition, in some embodiments, in order to facilitate the discharge of dust, the negative pressure filtration dust removal system may further include an ash discharge subsystem, which is arranged at the bottom of the negative pressure filtration container. After the dust dropped from the filter cartridge 7 reaches a predetermined weight, the ash discharge subsystem can remove the dust. The ash discharge subsystem includes an ash discharge valve 22 and an ash discharge chamber 23, and the ash discharge chamber 23 is connected to the ash discharge 22. A weight sensor 21 is provided on the right side of the wall of the ash discharge chamber 23, and the weight sensor 21 is used to monitor the weight of dust in the ash discharge chamber 23. When the dust weight reaches a specified value, the main controller 26 automatically starts to open the ash discharge valve 22 to discharge the dust.

[0058] When a fixed cleaning cycle is reached, a control command is issued through the main controller 26 to automatically open the first pulse valve 18A to achieve cleaning. During the dust cleaning process, if the pressure difference sensor group 5 monitors the pressure difference of the dust-containing airflow in the inlet pipe 1 and sends it to the main controller 26, when the pressure difference reaches the set value, the main controller 26 issues a corresponding control command to operate the motor 15 under the filter cartridge 7. The motor 15 drives the rotating shaft 14 and the filter cartridge 7 to rotate in turn, and uses centrifugal force to clean the dust attached to the filter cartridge 7. A cleaning brush 12 can be provided on the side of the filter cartridge 7 to brush the filter cartridge 7 during its rotation. The cleaning brush 12 can better clean the dust adhering to the filter cartridge 7.

[0059] Preferably, the truncated cone lining filter element 9 is fixed inside the filter cartridge 7, the bottom circle of the truncated cone lining filter element 9 can coincide with the bottom circle of the filter cartridge 7, and the height of the truncated cone lining filter element 9 can be 1-3 cm lower than the height of the filter cartridge 7, preferably 2 cm.

[0060] Preferably, the filter material 8 can be a composite electret filter material, that is, a composite nanofiber filter material 8 obtained by electrostatic spinning after mixing modified polyurethane and polyvinyl butyral. The filter material 8 is sleeved on the filter cartridge 7. The filter material 8 can filter dust and prevent dust from sticking.

[0061] Preferably, in the embodiment of the present application, the fixing tube 13 can be fixed to the flower plates 11 on both sides above the filter cartridge 7 by bolts or other means, so that the cleaning brush 12 is fixed to both sides of the filter cartridge 7, and the cleaning brush 12 brushes the surrounding of the filter cartridge 7 when the filter cartridge 7 rotates.

[0062] Under a fixed cleaning cycle, the master controller 26 can issue a control command to automatically close the vent valve 2 and open the first pulse valve 18A. When the filtering resistance of the filter chamber 24 is large, the motor 15 and the rotating shaft 14 drive the filter cartridge 7 to rotate during pulse cleaning, and the cleaning brushes 12 on both sides of the filter cartridge 7 will brush off part of the dust adhering to the filter material of the filter cartridge 7. When the filtering resistance of the filter chamber 24 is small, the filter cartridge 7 remains stationary and pulse spray cleaning is performed directly.

[0063] In the above embodiment, the pressure difference sensor group 5 is used to monitor the pressure difference of the dust-containing airflow in the inlet pipe 1 and the outlet pipe 28, and the flow meter 4 is used to monitor the flow rate of the dust-containing airflow at the inlet pipe 1. The outlet pipe 28 is provided with a temperature and humidity sensor 3 and a fan 27. The temperature and humidity sensor 3 is used to monitor the humidity and temperature of the dust-containing airflow at the outlet pipe 28, and the fan 27 is used to extract clean air.

[0064] The dust-laden airflow is controlled to enter the filter chamber 24 through the vent valve 2. When the temperature and humidity sensor 3 detects that the humidity of the dust-laden airflow in the inlet pipe 1 is high, the heater 6 is started to control the relative humidity of the filter chamber 24 by increasing the temperature. The filter cartridge 7 in the filter chamber 24 is a cylindrical structure and is placed vertically, the purpose is to let part of the dust fall freely by its own weight. The filter material 8 on the filter cartridge 7 is a composite electret filter material, that is, a composite nanofiber filter material 8 obtained by electrostatic spinning after a mixture of modified polyurethane and polyvinyl butyral. The composite nanofiber filter material 8 has excellent air permeability and waterproof properties, good pore structure, and high specific surface area, so it can achieve high air permeability. At the same time, the filter material 8 has a certain waterproof performance, which can effectively prevent moisture penetration.

[0065] Reference Figure 1 and Figure 4 The top of the filter cartridge 7 is rotatably connected to the ceiling. The specific rotatable connection method can be:

[0066] The top of the filter cartridge 7 is connected to the ceiling 11 through a cylindrical roller bearing 10, which is composed of a top outer ring support rod, a plurality of rolling balls, and a leather cover, wherein a plurality of (preferably fourteen in the embodiment of the present application) evenly distributed rolling balls are respectively arranged inside the top outer ring support rod, and the upper part of the top outer ring support rod is wrapped by a leather cover to prevent dust from entering, and the outer ring support rod can be stuck on the ceiling 11 and can rotate relative to the ceiling 11 through the rolling balls. By setting the cylindrical roller bearing 10, the filter cartridge 7 can be fixed, and the filter cartridge 7 can rotate relative to the ceiling 11.

[0067] Of course, the rotational connection between the top of the filter cartridge 7 and the ceiling can also be achieved through other similar structures, which will not be explained here one by one.

[0068] Reference Figure 1 The pressure difference sensor group 5 is connected to the inlet pipe 1 and the outlet pipe 28, and is used to receive the pressure difference signal of the dust-containing airflow and transmit it to the data controller 29. After processing the signal, the data controller 29 transmits the pressure difference data to the main controller 26. When the fixed cleaning cycle is reached, the main controller 26 controls the pulse valve 18 to open. When the resistance of the filter cartridge 7 reaches a certain level, the main controller 26 automatically turns on the motor 15 to drive the filter cartridge 7 to rotate at a certain speed, and the cleaning brush 12 also starts to scrub the dust stuck around the filter cartridge 7.

[0069] In the examples of this application, see Figure 1As shown, a data controller 29 is connected to the right side of the filter dust removal device of the filter dust removal system, which is respectively connected to the differential pressure sensor group 5, the temperature and humidity sensor 3, and the weight sensor 21. After the sensor signals of the differential pressure sensor group 5, the temperature and humidity sensor 3, and the weight sensor 21 are transmitted to the data controller 29, the data controller 29 processes the data and then transmits it to the main controller 26, which issues a corresponding control instruction. When an error occurs in a part of the system, the main controller 26 issues a stop control instruction.

[0070] In some embodiments, see Figure 5 As shown, a second pulse blowing cleaning subsystem can also be set on the left side of the inner wall of the ash unloading chamber 23. The main controller 26 automatically starts to open the ash unloading valve 22 and at the same time opens the second pulse blowing cleaning subsystem on the left side of the inner wall of the ash unloading chamber 23 to spray compressed air to prevent dust blockage at the ash unloading valve 22, so as to better remove the dust accumulated in the ash unloading chamber 23.

[0071] In some embodiments, the present application further provides a negative pressure filtration dust removal method suitable for a humid environment, comprising:

[0072] Step S100, obtaining the pressure difference between the inlet pipe 1 and the outlet pipe 28;

[0073] Step S200, judging whether the resistance state of the filter chamber 24 is a high resistance state according to the flow rate of the dust-laden airflow and the pressure difference between the inlet pipe 1 and the outlet pipe 28; wherein the high resistance state is a state where the resistance of the filter chamber is higher than a preset resistance;

[0074] Step S300: If it is determined that the resistance state of the filter chamber 24 is a high resistance state, the filter cartridge 7 is controlled to rotate at a desired rotation speed.

[0075] According to the flow rate of the dust-laden airflow and the pressure difference between the inlet pipe 1 and the outlet pipe 28, it is determined whether the resistance state of the filter chamber 24 is a high resistance state; if it is determined that the resistance state of the filter chamber 24 is a high resistance state, the filter cartridge 7 is controlled to rotate at a desired speed. The filter cartridge 7 rotates at the desired speed, and uses centrifugal force to discharge part of the dust on the filter material 8 around the filter cartridge 7. During the rotation process, the brushing component will also brush off the dust adhering to the surface of the filter cartridge 7, thereby achieving the best cleaning effect.

[0076] In step S200, it includes:

[0077] Step S201: Determine the resistance state of the filter chamber 24 according to formula (1). If it is a high resistance state (i.e. ) then start the rotation mode of the filter cartridge 7; if it is in the low resistance state (i.e. ) the filter cartridge 7 remains stationary and the motor 15 stops working. ΔP and Q1 are the pressure difference α when the dust-laden airflow passes through the clean filter cartridge 7.

[0078] Value and flow rate, ΔP, Q2 are the pressure difference and flow rate of the dust-laden airflow when it passes through the dust filter cartridge 7, which are monitored by the pressure difference sensor group 5 and the flowmeter 4.

[0079]

[0080] Step S300 includes:

[0081] Step S301: If the filter chamber 24 is in a high resistance state, the main controller 26 starts the rotation mode of the filter cartridge 7 while opening the first pulse valve 18A. At this time, the rotation speed required for the filter cartridge 7 to rotate is calculated according to formula (2):

[0082]

[0083] In the formula: k is the redundancy coefficient, which is 1.3; f is the power supply frequency; G is the pole pair number of the motor 15; ΔP is the pressure difference between the dust-laden airflow at the inlet pipe 1 and the outlet pipe 28, which is monitored by the pressure difference sensor group 5, and ΔP is the set rated pressure difference between the inlet pipe 1 and the outlet pipe 28.

[0084] δ

[0085] Step S302: The speed N of the filter cartridge 7 is determined. Based on this, the power P1 required to be set for the motor 15 is calculated by formula (3):

[0086]

[0087] Wherein: m is the mass of the filter cartridge 7; t is the power compensation coefficient, which is 1.25; N is the rotation speed of the filter cartridge 7; π is 3.14; R is the radius of the filter cartridge 7; η3 and η4 are the efficiency and transmission efficiency of the motor 15 respectively.

[0088] Through the above scheme, the power of the motor 15 can be calculated according to the high resistance state, and then the main controller 26 issues a control instruction to control the power of the motor 15, so as to control the filter cartridge 7 to rotate at a desired speed.

[0089] Furthermore, in some embodiments, the dust removal method further comprises:

[0090] Step S400: monitor the weight m of the dust dropped from the filter cartridge 7 in the dust unloading chamber 23. n , set the rated weight of dust in the dust discharge chamber 23 to M δ , when m n ≥M δ When the dust in the dust unloading chamber 23 is unloaded, the dust unloading operation is performed.

[0091] Wherein, in step S400, the dust removal operation of the dust in the dust removal chamber 23 includes:

[0092] Step S401, open the ash discharge valve 22 and the second pulse valve 18B through the main controller 26, and spray compressed air from the second spray pipe 17B to the ash discharge valve 22, wherein the pulse spraying amount Q1 of the sprayed compressed air is calculated by the following formula (4):

[0093]

[0094] Wherein, l is the pulse injection amount compensation coefficient, which can be 1.5 in this embodiment, α is the injection amount required per unit area of ​​the ash discharge valve 22, which can be 4L in this embodiment, S is the area of ​​the ash discharge valve 22, which can be measured in advance, and m n M is the weight of dust accumulated in the dust discharge chamber 23, δ It is the rated weight of dust in the ash unloading chamber 23.

[0095] Furthermore, in some embodiments, the dust removal method may further include:

[0096] Step S500: Based on the heater 6, the temperature of the dust-laden airflow entering the filter chamber 24 is increased by ΔT, wherein the relative humidity RH of the dust-laden airflow in the inlet duct 1 is lower than a predetermined value, and the temperature change value ΔT required for the dust-laden airflow temperature to be increased is calculated by the following formula (5):

[0097]

[0098] Where: ΔP is the pressure difference between the dust-laden airflow in the inlet pipe 1 and the outlet channel, which is monitored by the pressure difference sensor group 5 connecting the inlet pipe 1 and the outlet pipe 28; V is the volume of the filter chamber 24, ρ is the density of the dust-laden airflow, r is the gas constant of the dust-laden airflow, Q is the dust-laden gas flow rate, RH 额 For the set relative humidity rating, take 70%.

[0099] In the embodiment of the present application, the temperature change value ΔT required for the dust-laden airflow to be increased is obtained from the previous step. At this time, the heating power P1 required to be set when the heater 6 is running is further calculated, and is calculated by formula (6):

[0100]

[0101] In the formula: k is the redundancy coefficient, which is taken as 1.45 considering other losses in the dust removal system; Q is the dust-laden gas flow rate, which is monitored by the flowmeter 4; ρ is the density of the dust-laden airflow; T0 is the temperature of the dust-laden airflow passing through the inlet pipe 1 without heating, and T1 is the temperature of the dust-laden airflow passing through the outlet pipe 28 after heating, which are respectively monitored by the temperature and humidity sensor 3 of the inlet pipe 1 and the temperature and humidity sensor 3 of the outlet pipe 28; C is the specific heat capacity of the dust-laden airflow, which is taken as 0.24; η1 and η2 are the efficiency of the heater 6 and the efficiency of the fan 27.

[0102] Through step S500, the main controller 26 can calculate the heating power P1 that needs to be set when the heater 6 is running, and then the main controller 26 sets the power of the heater according to the heating power P1, thereby controlling the temperature increase ΔT of the dust-laden airflow.

[0103] In some embodiments, step S600 is also included: closing the ventilation valve 2 and opening the first pulse jet cleaning subsystem, and the first pulse jet cleaning subsystem sprays the filter cartridge 7 according to the set spray air volume.

[0104] Specifically, after the dust removal system has been running for a certain period of time, some dust will adhere to the filter material 8 around the filter cartridge 7, and it is stipulated that pulse cleaning is performed every certain period of time (for example, 4 minutes or 5 minutes, which is set according to the actual situation). At this time, the main controller 26 automatically closes the ventilation valve 2 and opens the pulse cleaning device. The first pulse spray cleaning subsystem sets the air volume for each pulse spray to be calculated by formula (7), and controls the spray volume by controlling the pressure of the air tank 19. When the air tank 19A reaches the rated pressure value, the pulse valve 18A is closed, and the rated pressure value of the air tank 19A to be set is calculated according to formula (8).

[0105] Q2=qnΔPπdL (7)

[0106] Wherein: q is the required spraying volume of the filter material per unit area on the filter cartridge 7, which is 10L; n is the number of the first nozzles 16A; ΔP is the pressure difference of the dust-laden airflow at the outlet pipe 28 and the inlet pipe 1 of the dust removal system, which is monitored by the pressure difference sensor group 5; π is 3.14; d is the diameter of the filter cartridge 7; and L is the height of the filter cartridge 7.

[0107]

[0108] Where: Q2 is the amount of air injected each time; P0 is the static pressure in the first air storage tank 19A before injection, P 额 is the rated pressure value set in the first gas storage tank 19A, which is monitored by the pressure sensor 20 in the first gas storage tank 19A; P θ is the standard atmospheric pressure; V is the volume of the first gas storage tank 19A.

[0109] When the dust removal system automatically opens the first pulse valve 18A for dust removal, the main controller 26 can also execute formula (1).

[0110] In summary, the present application has the following effects: (1) In a humid environment, dust around the filter cartridge 7 is easy to stick and clump. The present invention places the filter cartridge 7 vertically, and a truncated cone lining filter element 9 is provided inside the filter cartridge 7. During pulse cleaning, the gas can be better sprayed around the filter cartridge 7. A cylindrical roller bearing 10 is provided at the connection between the filter cartridge 7 and the flower plate 11. When the filter chamber 24 reaches a certain resistance, the motor 15 and the rotating shaft 14 will drive the filter cartridge 7 to rotate, and use centrifugal force to discharge part of the dust on the filter material 8 around the filter cartridge 7. During the rotation process, the cleaning brush 12 will also brush off the dust adhering to the surface of the filter cartridge 7, thereby achieving the best cleaning effect.

[0111] (2) In a humid environment, each subsystem is provided with a corresponding sensor module, which is respectively located in the filter chamber 24, the dust discharge chamber 23, and the inlet pipe 1. The sensor at the inlet pipe 1 mainly monitors the relative humidity, temperature, and pressure difference of the dust-laden airflow in the inlet pipe 1. The temperature in the filter chamber 24 is controlled by the heater 6 in the inlet pipe 1, thereby controlling the dryness in the filter chamber 24. Under a fixed cleaning cycle, the main controller 26 controls the pulse cleaning device to open the first pulse valve 18, and the first nozzle 16 sprays compressed air to perform regular cleaning on the filter cartridge 7 to prevent dust from adhering to the filter material 8 and improve the dust removal efficiency.

[0112] (3) Under other environmental conditions, the dust removal system automatically identifies the sensor signals of each subsystem and transmits them to the data controller 29. The data controller 29 processes the signals into data and feeds them back to the main controller 26. The main controller 26 automatically opens the corresponding valves to perform filtering, cleaning, dust unloading and other operations. The linkage reaction of the dust removal system realizes intelligent dust removal.

[0113] A negative pressure filtering dust removal device comprises a memory and a processor; wherein the memory is used to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to implement any of the method steps described.

[0114] A readable storage medium stores computer instructions, which, when executed by a processor, implement any of the method steps described above.

[0115] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A negative pressure filtration dust removal system suitable for humid environments, characterized in that: include: A negative pressure filtration container, wherein the negative pressure filtration container has a filtration chamber; The negative pressure filtration container comprises an inlet pipe and an outlet pipe connected to the inlet pipe, wherein the inlet pipe and the outlet pipe are both connected to the filter chamber; a vent valve is connected to the inlet pipe, and a fan is connected to the outlet pipe; a flow acquisition element and a heater are also connected to the inlet pipe, and a differential pressure sensor group is provided in the inlet pipe and the outlet channel; A filter cartridge, wherein the filter cartridge is disposed in the filter chamber; A rotation drive assembly, the rotation drive assembly is connected to the filter cartridge and is used to drive the filter cartridge to rotate; A control component, the control component is connected to the negative pressure filtration container, and the control component includes a main controller and a data controller connected to the main controller; The main controller is used to determine whether the resistance state of the filter chamber is a high resistance state, so as to adjust the rotation speed of the filter cartridge to the desired rotation speed.

2. The negative pressure filtering dust removal system suitable for humid environments according to claim 1 is characterized in that: Also includes: A brushing assembly, arranged on one side of the filter cartridge, for brushing away dust on the filter cartridge; A first pulse jet cleaning subsystem, the first pulse jet cleaning subsystem comprising a first jet pipe, a first pulse valve, a first air storage tank and a first nozzle, wherein the first jet pipe is connected to the first pulse valve, the first air storage tank and the first nozzle respectively, and the first pulse jet cleaning subsystem is connected to the negative pressure filter container; The second pulse jet cleaning subsystem includes a second jet pipe and a second pulse valve, the second jet pipe is connected to the second pulse valve, and the second pulse jet cleaning subsystem is connected to the negative pressure filter container.

3. The negative pressure filtering dust removal system suitable for humid environments according to claim 1, characterized in that: It also includes an ash unloading subsystem, which includes an ash unloading valve and an ash unloading chamber, and the ash unloading chamber is connected to the ash unloading valve; the ash unloading subsystem is arranged at the bottom of the negative pressure filter container, and is configured to remove the dust after the dust dropped from the filter cartridge reaches a predetermined weight.

4. A negative pressure filtration dust removal method suitable for a humid environment, characterized in that: include: The pressure difference between the inlet pipe of the negative pressure filtration container and the outlet pipe of the negative pressure filtration container is obtained by a pressure difference sensor group; The flow rate of the dust-laden airflow in the filter chamber is obtained by a flow acquisition element; According to the flow rate of the dust-laden airflow in the filter chamber and the pressure difference between the inlet pipe and the outlet pipe, it is determined whether the resistance state of the filter chamber is a high resistance state; If it is determined that the resistance state of the filter chamber is a high resistance state, the rotary drive assembly is controlled to drive the filter cartridge to rotate at a desired rotation speed.

5. The negative pressure filtration dust removal method suitable for a humid environment according to claim 4, characterized in that: According to the flow rate of the dust-laden airflow and the pressure difference between the inlet and outlet pipes, it is judged whether the resistance state of the filter chamber is a high resistance state, including: Determine the resistance state of the filter chamber according to formula (1); If it is in a high resistance state, the filter cartridge's rotation mode is started; if it is in a low resistance state, the filter cartridge remains stationary and the rotation drive assembly stops working; Among them, ΔP and Q1 are the pressure difference and flow rate of the dust-laden airflow passing through the clean filter cartridge, ΔP and α Q2 is the pressure difference and flow rate of the dust-laden air flow passing through the filter cartridge.

6. The negative pressure filtering dust removal method suitable for a humid environment according to claim 4, characterized in that: If it is determined that the resistance state of the filter chamber is a high resistance state, controlling the filter cartridge to rotate at a desired rotation speed comprises: If the filter chamber is in a high resistance state, the main controller controls the filter cartridge to rotate. At this time, the required rotation speed of the filter cartridge is calculated according to formula (2): Where: k is the surplus coefficient; f is the power frequency; G is the number of pole pairs of the rotary drive component; ΔP is the pressure difference of the dust-laden airflow at the inlet and outlet pipes, which is monitored by the pressure difference sensor group; ΔPδ is the rated pressure difference between the inlet and outlet pipes. According to the filter cartridge speed N, the power P1 required for the rotary drive assembly is determined by formula (3): Where: m is the mass of the filter cartridge; t is the power compensation coefficient, which is 1.25; N is the rotation speed of the filter cartridge; π is 3.14; R is the radius of the filter cartridge; η3 and η4 are the efficiency and transmission efficiency of the rotary drive assembly, respectively; According to the power P1, the rotation speed of the filter cartridge is adjusted to a desired rotation speed.

7. The negative pressure filtering dust removal method suitable for a humid environment according to claim 4, characterized in that: The dust removal method further comprises: monitoring the weight m of the dust dropped from the filter cartridge in the dust removal chamber n , set the rated weight of dust in the dust unloading chamber to M δ , when m n ≥M δ At the same time, the dust in the dust unloading room is unloaded.

8. The negative pressure filtering dust removal method suitable for a humid environment according to claim 7, characterized in that: Carry out dust removal operations on the dust in the dust removal room, including: Get the pulse injection volume Q1; The main controller opens the ash discharge valve and the pulse valve, and adjusts the compressed air sprayed from the spray pipe to the ash discharge valve according to the pulse spraying amount Q1; Among them, the pulse injection amount Q1 of the compressed air is calculated by the following formula: Where l is the pulse injection amount compensation coefficient, α is the injection amount required per unit ash discharge valve area, S is the area of ​​the ash discharge valve, m n is the weight of dust accumulated in the dust unloading chamber, M δ It is the rated weight of dust in the ash unloading chamber.

9. The negative pressure filtration dust removal method suitable for a humid environment according to claim 4, characterized in that: Also includes: Based on the heater raising the temperature of the dust-laden airflow entering the filter chamber by ΔT, wherein the relative humidity RH of the dust-laden airflow in the inlet duct is lower than a predetermined value, the temperature change value ΔT required for the dust-laden airflow temperature to be raised is calculated by the following formula: Where: ΔP is the pressure difference between the inlet pipe and the outlet channel of the dust-laden airflow, V is the volume of the filter chamber, ρ is the density of the dust-laden airflow, r is the gas constant of the dust-laden airflow, Q is the dust-laden gas flow rate, RH 额 is the set relative humidity rating.

10. The negative pressure filtering dust removal method suitable for a humid environment according to claim 4, characterized in that: Also includes: The ventilation valve is closed and the first pulse jet cleaning subsystem is turned on, and the first pulse jet cleaning subsystem sprays the filter cartridge according to the set spray air volume; The air volume of each pulse spray of the first pulse spray cleaning subsystem is calculated by formula (7), and the spray volume is controlled by controlling the pressure of the first air storage tank. When the first air storage tank reaches the rated pressure value, the first pulse valve is closed, and the rated pressure value to be set for the first air storage tank is calculated according to formula (8); Q2=qnΔPπdL (7) Where: q is the required spraying volume of the filter material per unit area on the filter cartridge, which is 10L; n is the number of the first nozzles; ΔP is the pressure difference of the dust-laden airflow at the outlet and inlet pipes of the dust removal system, which is monitored by the pressure difference sensor group; π is 3.14; d is the diameter of the filter cartridge; L is the height of the filter cartridge; Where: Q2 is the amount of air injected each time; P0 is the static pressure in the first air storage tank 19 before injection, P 额 is the set rated pressure value in the first gas storage tank, which is monitored by the pressure sensor in the first gas storage tank; P θ is the standard atmospheric pressure; V is the volume of the first gas storage tank.

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