A negative pressure filtration type dust removal system and method suitable for a humid environment

Abstract

The application discloses a negative pressure filtering type dust removal system and method suitable for a humid environment, relates to the technical field of negative pressure filtering type dust removal, and discloses the technical scheme of the negative pressure filtering type dust removal system suitable for the humid environment: a negative pressure filtering container, the negative pressure filtering container is internally provided with a filtering chamber; the negative pressure filtering container comprises an inlet pipeline, an outlet pipeline in communication with the inlet pipeline, and the inlet pipeline and the outlet pipeline are in communication with the filtering chamber; an air vent valve is connected in the inlet pipeline, and a fan is connected in the outlet pipeline; a flow acquisition element and a heater are further connected in the inlet pipeline; differential pressure sensor groups are arranged in the inlet pipeline and the outlet pipeline; a filter cartridge is arranged in the filtering chamber; a rotary driving assembly is connected with the filter cartridge and used for driving the filter cartridge to rotate; a control assembly is connected with the negative pressure filtering container, and the control assembly comprises a general control instrument and a data control instrument connected with the general control instrument; wherein the general control instrument is used for judging whether the resistance state of the filtering chamber is a high resistance state, so as to adjust the rotating speed of the filter cartridge to be a desired rotating speed.

Description

TECHNICAL FIELD

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

[0002] Industrial dust hazard is one of the main disasters restricting industrial safety production, and its harm mainly manifests in the following three aspects, i.e. causing dust explosion, 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 tunneling working face, due to poor ventilation capacity of the roadway, a large amount of respirable dust accumulates, and coal mine dust disaster accidents are caused.

[0003] In a humid production environment, the traditional filtration dust removal system faces some challenges. When using a filter cartridge dust collector for dust removal, dust is easily adhered to the surface of the filter cartridge and is not easy to remove, which causes clogging and damage of the filter core and secondary pollution. If not replaced in time, it will greatly reduce the dust removal efficiency of the filtration dust removal system. In addition, in the existing control of filter cartridge rotary dust removal, if the filter cartridge rotation speed is too slow, the dust may stay in the filter cartridge for too long, affecting the separation and removal effect of the dust, making the dust removal effect unsatisfactory, and also causing the dust in the filter cartridge to accumulate more, increasing the risk of clogging, thereby affecting the continuous operation ability of the equipment. If the filter cartridge rotation speed is too fast, it will increase the wear and energy consumption of the equipment, which may cause the service life of the equipment to be shortened, and thus increase the maintenance cost. Based on the background of current industrial dust prevention and control, in order to solve the above problems, the present application provides a negative pressure filtration dust removal system and method suitable for humid environment. SUMMARY

[0004] In view of the deficiencies of the prior art, the purpose of the present application is to provide a negative pressure filtration dust removal system and method suitable for humid environment, wherein the dust removal system can achieve excellent dust removal and dust removal effect in a humid environment, and avoid clogging of the filter core and secondary pollution.

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

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

[0007] The negative pressure filtration container comprises an inlet pipeline, an outlet pipeline in communication with the inlet pipeline, the inlet pipeline and the outlet pipeline are in communication with the filtration chamber; a breather valve is connected in the inlet pipeline, a fan is connected in the outlet pipeline; a flow acquisition element and a heater are further connected in the inlet pipeline, and a differential pressure sensor group is arranged in the inlet pipeline and the outlet pipeline;

[0008] A filter cartridge, the filter cartridge is arranged in the filtration chamber;

[0009] a rotating driving assembly connected with the filter cartridge for driving the filter cartridge to rotate;

[0010] a control assembly connected with the negative pressure filtering container, the control assembly comprising a total control instrument and a data control instrument connected with the total control instrument; wherein the total control instrument is used for judging whether the resistance state of the filtering chamber is a high resistance state, so as to adjust the rotating speed of the filter cartridge.

[0011] In the negative pressure filtering dust removal system suitable for a humid environment provided in the application, a brushing assembly is arranged on one side of the filter cartridge and used for brushing dust on the filter cartridge.

[0012] a first pulse blowing ash removal subsystem, comprising a first blowing pipe, a first pulse valve, a first gas storage tank and a first nozzle, wherein the first blowing pipe is connected with the first pulse valve, the first gas storage tank and the first nozzle respectively, and the first pulse blowing ash removal subsystem is connected with the negative pressure filtering container.

[0013] a second pulse blowing ash removal subsystem, comprising a second blowing pipe and a second pulse valve, wherein the second blowing pipe is connected with the second pulse valve, and the second pulse blowing ash removal subsystem is connected with the negative pressure filtering container.

[0014] In the negative pressure filtering dust removal system suitable for a humid environment provided in the application, a dust unloading subsystem is further provided, comprising a dust unloading valve and a dust unloading chamber, wherein the dust unloading chamber is connected with the dust unloading valve; the dust unloading subsystem is arranged at the bottom of the negative pressure filtering container and configured to remove dust when the dust dropped from the filter cartridge reaches a predetermined weight.

[0015] The application further provides a negative pressure filtering dust removal method suitable for a humid environment, comprising:

[0016] acquiring the pressure difference between the inlet pipe of the negative pressure filtering container and the outlet pipe of the negative pressure filtering container through the differential pressure sensor group;

[0017] acquiring the flow size of the dust-containing airflow in the filtering chamber through the flow acquisition element;

[0018] judging whether the resistance state of the filtering chamber is a high resistance state according to the flow size of the dust-containing airflow in the filtering chamber and the pressure difference between the inlet pipe and the outlet pipe;

[0019] if it is determined that the resistance state of the filtering chamber is a high resistance state, controlling the rotating driving assembly to drive the filter cartridge to rotate at the expected rotating speed.

[0020] The application provides a negative pressure filtering type dust removal method suitable for a humid environment, and further comprises monitoring the weight of dust falling from the filter cartridge in the ash discharging chamber , setting the rated weight of dust in the ash discharging chamber as , when ≥ , performing an ash discharging operation on the dust in the ash discharging chamber.

[0021] The application provides a negative pressure filtering type dust removal method suitable for a humid environment, and further comprises increasing the temperature of dust-containing airflow entering the filter chamber based on a heater , wherein the relative humidity RH of the dust-containing airflow in the inlet pipeline is lower than a predetermined value.

[0022] The application provides a negative pressure filtering type dust removal method suitable for a humid environment, and further comprises closing the ventilation valve and opening the first pulse jet cleaning subsystem, and the first pulse jet cleaning subsystem sprays the filter cartridge according to a set amount of spraying air.

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

[0024] The negative pressure filtering type dust removal system suitable for a humid environment provided by the application is provided with a rotating driving assembly and a brushing assembly, and the rotating driving assembly is drivingly connected with the filter cartridge. In a humid environment, dust around the filter cartridge is prone to be adhered and caked. When the filter chamber reaches a certain resistance, the rotating driving assembly drives the filter cartridge to rotate, and centrifugal force is used to discharge part of dust on filter material around the filter cartridge. In the process of rotation, the brushing assembly also brushes off dust adhered to the surface of the filter cartridge, so that the best dust cleaning effect is achieved.

[0025] The negative pressure filtering type dust removal method suitable for a humid environment provided by the application determines whether the resistance state of the filter chamber is a high resistance state according to the flow size of dust-containing airflow and the pressure difference between the inlet pipeline and the outlet pipeline. 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 an expected rotating speed. The filter cartridge rotates at the expected rotating speed, centrifugal force is used to discharge part of dust on filter material around the filter cartridge, and in the process of rotation, the brushing assembly also brushes off dust adhered to the surface of the filter cartridge, so that the best dust cleaning effect is achieved.

[0026] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0028] Figure 1 is a structural schematic diagram of a negative pressure filtration type dust removal system suitable for a humid environment provided by the embodiments of the present application;

[0029] Figure 2 is a structural schematic diagram of a filter cartridge in a negative pressure filtration type dust removal system suitable for a humid environment provided by the embodiments of the present application;

[0030] Figure 3 is a structural schematic diagram of a circular table lining in a negative pressure filtration type dust removal system suitable for a humid environment provided by the embodiments of the present application;

[0031] Figure 4 is a structural schematic diagram of a connection between a filter cartridge and a rotary driving assembly in a negative pressure filtration type dust removal system suitable for a humid environment provided by the embodiments of the present application;

[0032] Figure 5 is a structural schematic diagram of a negative pressure filtration type dust removal system suitable for a humid environment provided by another embodiment of the present application.

[0033] Reference signs:

[0034] 1, inlet pipeline; 2, breather valve; 3, temperature and humidity sensor; 4, flow meter; 5, differential pressure sensor group; 6, heater; 7, filter cartridge; 8, filter material; 9, circular table lining filter core; 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 gas storage tank; 20, first pressure sensor; 21, weight sensor; 22, ash unloading valve; 23, ash unloading chamber; 24, filter chamber; 25, cleaning chamber; 26, total control instrument; 27, fan; 28, outlet pipeline; 29, data control instrument. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, and all other embodiments obtained by those skilled in the art without creative labor based on the embodiments in the present application also belong to the protection scope of the present application.

[0036] Some embodiments of the present application will be described in detail with reference to the drawings. The following examples and features in the examples described below can be combined with each other in the case of no conflict.

[0037] It should be understood that the terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and the appended claims of the present application, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0038] 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 same items or similar items with basically the same function and role are distinguished by using "first", "second", etc. For example, the first groove and the second groove are only used to distinguish different grooves, and do not limit the sequence. Those skilled in the art can understand that "first", "second", etc. do not limit the quantity and execution order, and "first", "second", etc. also do not necessarily mean different.

[0039] It should be further understood that the term "and / or" used in the specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0040] The present inventors have found that in a humid environment, moisture in the environment will enter the dust removal system with dust-containing airflow in different forms, resulting in problems such as rapid increase in filtration resistance of the dust removal system and difficulty in cleaning dust.

[0041] Therefore, with reference to Figures 1-5 The present application provides a negative pressure filtration type dust removal system suitable for a humid environment, comprising:

[0042] The negative pressure filtration container has a filtration chamber 24 inside;

[0043] The negative pressure filtration container comprises an inlet pipe 1 and an outlet pipe 28 connected with the inlet pipe 1, and the inlet pipe 1 and the outlet pipe 28 are both connected with the filtration chamber 24; a gas inlet valve 2 is arranged in the inlet pipe 1 to control the entry of gas, and a fan 27 is arranged in the outlet pipe 28; a flow acquisition element and a differential pressure sensor group 5 are further arranged between the inlet pipe 1 and the outlet pipe 28; the flow acquisition element can be a flow meter 4 or other components that can achieve the same function;

[0044] A filter cartridge 7 is arranged in the filtration chamber 24, and the dust-containing airflow flows from the inlet pipe 1 into the filtration chamber 24 and flows to the outlet pipe 28 through the filter cartridge 7;

[0045] A rotating driving assembly is in driving connection with the filter cartridge 7 and is configured to drive the filter cartridge 7 to rotate. The rotating driving assembly can be an electric motor 15, or can be another component capable of achieving the same function.

[0046] A brushing assembly is arranged at one side of the filter cartridge 7 and is configured to brush the dust on the filter cartridge 7.

[0047] A control assembly is connected to the negative pressure filter container. The control assembly includes a general control instrument and a data control instrument connected to the general control instrument.

[0048] The general control instrument is configured to determine whether the resistance state of the filter chamber is a high resistance state according to the flow rate of the dust-containing air flow and the pressure difference between the inlet pipe and the outlet pipe, so as to control the rotational speed of the filter cartridge to be the expected rotational speed.

[0049] In a humid environment, the dust around the filter cartridge 7 is prone to stick together. When the filter chamber 24 reaches a certain resistance, the rotating driving assembly drives the filter cartridge 7 to rotate, and uses centrifugal force to discharge a part of the dust on the filter material 8 arranged around the filter cartridge 7. In the process of rotation, the brushing assembly also brushes off the dust sticking to the surface of the filter cartridge 7, so as to achieve the best dust cleaning effect.

[0050] In this embodiment, a temperature and humidity sensor 3 can be arranged on the inner wall of the inlet pipe 1 by means of bolts or other means, so as to monitor the temperature and relative humidity at the inlet pipe 1. In order to facilitate monitoring the flow rate of the dust-containing air flow passing through the inlet pipe 1, a flow meter 4 can also be arranged in the inlet pipe 1 by means of bolts or other means. A differential pressure sensor group 5 can be arranged between the inlet pipe 1 and the outlet pipe 28. The differential pressure sensor group 5 includes sensors arranged at the inlet pipe 1 and the outlet pipe 28 respectively, and is configured to monitor the pressure difference (i.e. pressure change) between the inlet and the 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). The heater 6 is configured to increase the temperature and thus reduce the relative humidity of the filter chamber 24, so as to ensure that the relative humidity in the filter chamber 24 is always lower than a preset threshold (e.g. 70%).

[0051] 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 temperature of the filter chamber 24 is further controlled to control the relative humidity of the filter chamber 24.

[0052] Referring to Figure 1 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 temperature of the filter chamber 24 is further controlled to control the relative humidity of the filter chamber 24.

[0053] Further, the cleaning chamber 25 can be provided with a first pulse spray dust removal sub-system and a brush cleaning assembly. The first pulse spray dust removal sub-system can be arranged above the filter cartridges 7 and used to spray gas to the filter cartridges 7. The first pulse spray dust removal sub-system 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 gas storage tank 19A connected to the first spray pipe 17A for supplying gas, and a first pressure sensor 20A arranged in the first gas storage tank 19A. The first nozzle 16A can be arranged vertically like the filter cartridges 7. Each first nozzle 16A is in a straight line with the opening of the corresponding filter cartridge 7. The distance between the first nozzle 16A and the filter cartridge 7 can be 2-3 cm. The first nozzle 16A of the cleaning chamber 25 sprays compressed air. The first nozzle 16A sprays compressed air at a certain speed and uniformly around the filter cartridges 7 and the circular table inner lining filter element 9, thereby improving the dust removal efficiency of the dust removal chamber.

[0054] The brush cleaning assembly is arranged on one side of the filter cartridges 7 and used to brush the dust on the filter cartridges 7. The brush cleaning assembly includes a fixed pipe 13 fixed to the ceiling and a cleaning brush 12 connected to the fixed pipe 13.

[0055] The circular table inner lining filter element 9 is arranged in the filter cartridge 7 and is sleeved on the bottom surface of the filter cartridge 7. The circular table inner lining filter element 9 can increase the filtering area of the filter material 8. The first pulse spray dust removal sub-system can spray the compressed air sprayed by the first nozzle 16A around the filter cartridges 7 and clean the circular table inner lining filter element 9, thereby further improving the dust removal efficiency.

[0056] In addition, in some embodiments, in order to facilitate the discharge of dust, the negative pressure filtration dust removal system can further include a dust unloading sub-system. The dust unloading sub-system is arranged at the bottom of the negative pressure filtration container. When the dust dropped from the filter cartridges 7 reaches a predetermined weight, the dust unloading sub-system can remove the dust. The dust unloading sub-system includes a dust unloading valve 22 and a dust unloading chamber 23. The dust unloading chamber 23 is connected to the dust unloading valve 22. The right side of the chamber wall of the dust unloading chamber 23 is provided with a weight sensor 21. The weight sensor 21 is used to monitor the weight of the dust in the dust unloading chamber 23. When the weight of the dust reaches a specified value, the total control instrument 26 automatically starts to open the dust unloading valve 22, thereby discharging the dust.

[0057] When the fixed cleaning cycle is reached, the control command is sent by the general control instrument 26 to automatically open the first pulse valve 18A to realize cleaning. During the process of cleaning dust, if the pressure difference sensor group 5 monitors the pressure difference value of the dust-containing airflow in the inlet pipeline 1 and sends it to the general control instrument 26, when the pressure difference value reaches the set value, the general control instrument 26 sends the corresponding control command to make the motor 15 below the filter cartridge 7 work, and the motor 15 drives the rotating shaft 14 and the filter cartridge 7 to rotate in turn, and the dust adhered to the filter cartridge 7 is cleaned by using the centrifugal force. The side of the filter cartridge 7 can be provided with a cleaning brush 12 to brush the filter cartridge 7 during the rotation of the filter cartridge 7, and the cleaning brush 12 can better clean the dust adhered to the filter cartridge 7.

[0058] Preferably, the circular-truncated-cone inner lining filter core 9 is fixed in the filter cartridge 7, the bottom circle of the circular-truncated-cone inner lining filter core 9 can coincide with the bottom circle of the filter cartridge 7, and the height of the circular-truncated-cone inner lining filter core 9 can be 1-3 cm lower than the height of the filter cartridge 7, preferably 2 cm.

[0059] Preferably, the filter material 8 can adopt a composite electret filter material, that is, a composite nanofiber filter material 8 obtained by electrospinning after mixing modified polyurethane and polyvinyl butyral, the filter material 8 is sleeved on the filter cartridge 7, and the filter material 8 can filter dust and prevent dust from adhering.

[0060] Preferably, in the embodiment of the application, the fixed tube 13 can be fixed on the two sides of the filter cartridge 7 by bolts or other ways to fix the cleaning brush 12 on the two sides of the filter cartridge 7, and the cleaning brush 12 brushes the filter cartridge 7 when the filter cartridge 7 rotates.

[0061] Under the fixed cleaning cycle, the general control instrument 26 can send the control command to automatically close the breather valve 2 and open the first pulse valve 18A. When the filtering resistance of the filter chamber 24 is large, the filter cartridge 7 is rotated by the motor 15 and the rotating shaft 14 during the pulse cleaning, and the cleaning brush 12 on the two sides of the filter cartridge 7 brushes away part of the dust adhered 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 in a stationary state, and pulse blowing cleaning is directly performed.

[0062] In the above embodiment, the pressure difference sensor group 5 is used to monitor the pressure difference value of the dust-containing airflow in the inlet pipeline 1 and the outlet pipeline 28, and the flow meter 4 is used to monitor the flow of the dust-containing airflow at the inlet pipeline 1. The outlet pipeline 28 is provided with the temperature and humidity sensor 3 and the fan 27, the temperature and humidity sensor 3 is used to monitor the humidity and temperature of the dust-containing airflow at the outlet pipeline 28, and the fan 27 is used to extract clean air.

[0063] The dust-containing airflow enters the filter chamber 24 through the air vent valve 2, and the heater 6 is started when the temperature and humidity sensor 3 detects that the humidity of the dust-containing airflow in the inlet pipe 1 is high, so as to control the relative humidity of the filter chamber 24 by increasing the temperature. The filter cartridge 7 in the filter chamber 24 is in a cylindrical structure and is vertically placed, and the purpose is to allow a part of the dust to freely fall by gravity. 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 electrospinning after mixing modified polyurethane and polyvinyl butyral. The composite nanofiber filter material 8 has excellent air permeability and waterproof performance, a good pore structure, and a high specific surface area, and thus can achieve high air permeability. Meanwhile, the filter material 8 has a certain waterproof performance and can effectively block the penetration of water.

[0064] With reference to Figure 1 and Figure 4 , the top of the filter cartridge 7 is rotationally connected with the ceiling. The specific rotational connection mode can be as follows:

[0065] The top of the filter cartridge 7 is connected with the ceiling 11 through a cylindrical roller bearing 10, and the cylindrical roller bearing 10 is composed of a top outer ring support rod, a plurality of rolling balls, and a leather sleeve. The top outer ring support rod is internally provided with a plurality of (preferably fourteen in the embodiment of the application) uniformly distributed rolling balls, and the upper part of the top outer ring support rod is wrapped with a leather sleeve to prevent dust from entering. The outer ring support rod can be clamped on the ceiling 11 and rotationally connected with the ceiling 11 through the rolling balls. By arranging the cylindrical roller bearing 10, the filter cartridge 7 can be fixed, and the filter cartridge 7 can rotate relative to the ceiling 11.

[0066] Of course, the top of the filter cartridge 7 can also be rotationally connected with the ceiling through other similar structures, which will not be described one by one here.

[0067] With reference to Figure 1 , the differential pressure sensor group 5 is connected with the inlet pipe 1 and the outlet pipe 28, and is used to receive a pressure difference value signal of the dust-containing airflow and transmit the signal to the data control instrument 29. After processing the signal, the data control instrument 29 transmits the pressure difference value data to the general control instrument 26. When a fixed cleaning period is reached, the general control instrument 26 controls the opening of the pulse valve 18, and when the resistance of the filter cartridge 7 reaches a certain degree, the general control instrument 26 automatically opens the motor 15 to drive the filter cartridge 7 to rotate at a certain speed, and the cleaning brush 12 also starts to brush the dust adhered around the filter cartridge 7.

[0068] In the embodiment of the application, with reference to Figure 1As shown, the filter dust removal device of the filter dust removal system is connected with a data control instrument 29 on the right side, which is connected with 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 control instrument 29, the data control instrument 29 processes the data and then transmits the data to the total control instrument 26, and the total control instrument 26 issues corresponding control instructions. When an error occurs in a part of the system, the total control instrument 26 issues a stop control instruction.

[0069] In some embodiments, referring to Figure 5 As shown, the inner wall left side of the ash discharge chamber 23 can also be provided with a second pulse jet dust cleaning subsystem. The total control instrument 26 automatically starts to open the ash discharge valve 22 and simultaneously opens the second pulse jet dust cleaning subsystem on the inner wall left side of the ash discharge chamber 23 to spray compressed air, so as to prevent dust blockage at the ash discharge valve 22, and the purpose is to better remove the dust accumulated in the ash discharge chamber 23.

[0070] In some embodiments, the application also provides a negative pressure filter type dust removal method suitable for a humid environment, comprising:

[0071] Step S100, obtaining a pressure difference value between the inlet pipeline 1 and the outlet pipeline 28;

[0072] Step S200, judging whether the resistance state of the filter chamber 24 is a high resistance state according to the flow size of the dust-containing airflow and the pressure difference value between the inlet pipeline 1 and the outlet pipeline 28; wherein the high resistance state is a state in which the resistance of the filter chamber is higher than a preset resistance;

[0073] Step S300, if it is determined that the resistance state of the filter chamber 24 is the high resistance state, controlling the filter cartridge 7 to rotate at an expected rotating speed.

[0074] According to the flow size of the dust-containing airflow and the pressure difference value between the inlet pipeline 1 and the outlet pipeline 28, whether the resistance state of the filter chamber 24 is a high resistance state is judged. If it is determined that the resistance state of the filter chamber 24 is the high resistance state, the filter cartridge 7 is controlled to rotate at an expected rotating speed. The filter cartridge 7 rotates at the expected rotating speed, and a part of dust on the filter material 8 around the filter cartridge 7 is discharged by using centrifugal force. In the process of rotation, the dust adhering to the surface of the filter cartridge 7 is also brushed off by the brushing assembly, so that the best dust cleaning effect is achieved.

[0075] In step S200, it includes:

[0076] Step S201, judging the resistance state of the filter chamber 24 according to formula (1). If it is a high resistance state (i.e. ), the rotating mode of the filter cartridge 7 is started; if it is a low resistance state (i.e. ), the filter cartridge 7 remains in a static state and the motor 15 stops working. 、 respectively, are the pressure difference and flow rate of the dust-laden air flow through the clean filter cartridge 7, , respectively, are the pressure difference and flow rate of the dust-laden air flow through the dirty filter cartridge 7, which are monitored by the differential pressure sensor set 5 and the flow meter 4,

[0077] (1).

[0078] Step S300 comprises:

[0079] Step S301, if the filter chamber 24 is in the high resistance state, the total control instrument 26 starts the rotation mode of the filter cartridge 7 while opening the first pulse valve 18A, at this time, the set rotation speed of the filter cartridge 7 required for rotation is calculated according to formula (2):

[0080] (2)

[0081] In the formula, k is the surplus coefficient, which is 1.3; f is the power frequency; G is the pole pair number of the motor 15; is the pressure difference of the dust-laden air flow at the inlet pipe 1 and the outlet pipe 28, which is monitored by the differential pressure sensor set 5, is the set rated pressure difference at the inlet pipe 1 and the outlet pipe 28.

[0082] Step S302, the rotation speed N of the filter cartridge 7 is determined, according to which, the set power required for the motor 15 is calculated by formula (3):

[0083] (3)

[0084] In the formula, 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; is 3.14; R is the radius of the filter cartridge 7; respectively, are the efficiency of the motor 15 and the transmission efficiency.

[0085] Through the above scheme, according to the high resistance state, the power of the motor 15 can be calculated, then the total control instrument 26 sends a control instruction to control the power of the motor 15, that is, the filter cartridge 7 can be controlled to rotate at the desired rotation speed.

[0086] Further, in some embodiments, the dust removal method further comprises:

[0087] Step S400, the weight of the dust falling from the filter cartridge 7 in the ash discharging chamber 23 is monitored , the rated weight of the dust in the ash discharging chamber 23 is set as , when ≥ , the ash discharging operation is performed on the dust in the ash discharging chamber 23.

[0088] In step S400, the dust in the dust discharging chamber 23 is discharged, including:

[0089] In step S401, the total control instrument 26 opens the dust discharging valve 22 and the second pulse valve 18B, and the compressed air in the second blowing pipe 17B is sprayed to the dust discharging valve 22, wherein the pulse spraying amount Q1 of the compressed air is calculated by the following formula (4):

[0090] (4)

[0091] Wherein, l is the pulse spraying amount compensation coefficient, which can be taken as 1.5 in the embodiment, is the spraying amount required for the unit area of the dust discharging valve 22, which can be taken as 4L in the embodiment, and S is the area of the dust discharging valve 22, which can be measured in advance, is the weight of the dust accumulated in the dust discharging chamber 23, is the rated weight of the dust in the dust discharging chamber 23.

[0092] Further, in some embodiments, the dust removal method can further include:

[0093] In step S500, the temperature of the dust-containing airflow entering the filter chamber 24 is raised by the heater 6 , wherein the relative humidity RH of the dust-containing airflow in the inlet pipeline 1 is lower than a predetermined value, and the temperature change value required for the temperature rise of the dust-containing airflow is calculated by the following formula (5):

[0094] (5)

[0095] Wherein: is the pressure difference of the dust-containing airflow in the inlet pipeline 1 and the outlet pipeline, which is monitored by the differential pressure sensor group 5 connected to the inlet pipeline 1 and the outlet pipeline 28; V is the volume of the filter chamber 24, is the density of the dust-containing airflow, r is the gas constant of the dust-containing airflow, and Q is the flow rate of the dust-containing airflow, is the set relative humidity rated value, which is taken as 70%.

[0096] In the embodiment of the present application, the temperature change value required for the temperature rise of the dust-containing airflow obtained from the above step At this time, the heating power required for the heater 6 to be set when running is further calculated , which is calculated by formula (6):

[0097] (6)

[0098] Wherein: k is the rich coefficient, considering other losses in the dust removal system, taking 1.45; Q is the flow of dust-containing gas, monitored by flow meter 4; is the density of the dust-containing gas flow; is the temperature of the dust-containing gas flow through the inlet pipe 1 without heating, is the temperature of the dust-containing gas flow through the outlet pipe 28 after heating, 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 respectively; C is the specific heat capacity of the dust-containing gas flow, taking 0.24; 、 is the efficiency of the heater 6 and the efficiency of the fan 27.

[0099] Through step S500, the total control instrument 26 can calculate the heating power required to be set for the heater 6 when running , then the total control instrument 26 sets the power of the heater according to the heating power , so as to control the temperature rise of the dust-containing gas flow .

[0100] In some embodiments, it further includes step S600: closing the breather valve 2 and opening the first pulse jet cleaning sub-system, and the first pulse jet cleaning sub-system sprays the filter cartridge 7 according to the set amount of jet air.

[0101] Specifically, after the dust removal system runs for a certain period of time, some dust will stick to the filter material 8 around the filter cartridge 7, and it is stipulated to perform pulse cleaning once every certain period of time (for example, it can be 4 minutes or 5 minutes, which is set according to actual conditions). At this time, the total control instrument 26 automatically closes the breather valve 2 and opens the pulse cleaning device, and the amount of air for each pulse jet of the first pulse jet cleaning sub-system is calculated by formula (7), and the jet amount is controlled by controlling the pressure of the gas storage tank 19, and when the gas storage tank 19A reaches the rated pressure value, the pulse valve 18A is closed, and the rated pressure value required to be set for the gas storage tank 19A is calculated according to formula (8):

[0102] (7)

[0103] Wherein: is the jet amount required by the unit area of the filter material on the filter cartridge 7, taking 10L; n is the number of the first nozzle 16A; is the pressure difference value of the dust-containing gas flow at the outlet pipe 28 and the inlet pipe 1 of the dust removal system, monitored by the pressure difference sensor group 5; taking 3.14; d is the diameter of the filter cartridge 7; L is the height of the filter cartridge 7:

[0104] (8)

[0105] In the formula: Q2 is the amount of air per injection; P1 is the static pressure in the first air tank 19A before injection, P2 is the set value of the rated pressure in the first air tank 19A, which is monitored by the pressure sensor 20 in the first air tank 19A; P0 is the standard atmospheric pressure; V is the volume of the first air tank 19A.

[0106] In addition to automatically opening the first pulse valve 18A for dust removal, the total control instrument 26 can also execute formula (1).

[0107] In summary, the present application has the following effects: (1) In a humid environment, dust around the filter cartridge 7 is prone to stick together. The present application vertically places the filter cartridge 7, which is provided with a circular table inner lining filter core 9. During pulse dust removal, gas can be better sprayed around the filter cartridge 7. The filter cartridge 7 is connected to the flower plate 11, which is provided with a cylindrical roller bearing 10. When the filtering chamber 24 reaches a certain resistance, the motor 15 and the rotating shaft 14 will drive the filter cartridge 7 to rotate, using centrifugal force to discharge a portion of the dust on the filter material 8 around the filter cartridge 7. In the process of rotation, the cleaning brush 12 will also brush off the dust sticking to the surface of the filter cartridge 7, thereby achieving the best dust removal effect.

[0108] (2) In a humid environment, each subsystem is provided with a corresponding sensor module, which is located in the filtering chamber 24, the dust discharging chamber 23, and the inlet pipeline 1. The sensor at the inlet pipeline 1 mainly monitors the relative humidity, temperature, and pressure difference of the dust-containing gas flow in the inlet pipeline 1. The temperature in the filtering chamber 24 is controlled by the heater 6 in the inlet pipeline 1, thereby controlling the dryness in the filtering chamber 24. Under a fixed cleaning cycle, the total control instrument 26 controls the pulse cleaning device to open the first pulse valve 18, and the first nozzle 16 sprays compressed air to perform timed cleaning of the filter cartridge 7, preventing dust from sticking to the filter material 8 and improving dust removal efficiency.

[0109] (3) In other environmental conditions, the dust removal system automatically identifies the sensor signals of each subsystem and transmits them to the data control instrument 29. The data control instrument 29 processes the signals into data and feeds them back to the total control instrument 26. The total control instrument 26 automatically opens the corresponding valves for filtering, cleaning, and discharging dust, etc. The linkage reaction of the dust removal system realizes intelligent dust removal.

[0110] A negative pressure filtering type dust removal device, comprising a storage and a processor; wherein the storage is used to store one or more computer instructions, wherein the one or more computer instructions are executed by the processor to realize the method steps of any one of the above.

[0111] A readable storage medium, which stores computer instructions thereon, the computer instructions are executed by a processor to realize the method steps of any one of the above.

[0112] While embodiments of the present application have been shown and described, it is to be understood that the embodiments described are merely divergences and modifications and not limitations of the scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure filtration dust removal method suitable for humid environments, characterized in that, This method is applied to a negative pressure filtration dust removal system suitable for humid environments, the system comprising: A negative pressure filter container, wherein the negative pressure filter container has a filter chamber; The negative pressure filter container includes an inlet pipe and an outlet pipe connected to the inlet pipe. Both the inlet pipe and the outlet pipe are connected to the filter chamber. An air valve is connected inside the inlet pipe, and a fan is connected inside the outlet pipe. A flow acquisition element and a heater are also connected inside the inlet pipe. Differential pressure sensor groups are installed in both the inlet pipe and the outlet channel. A filter cartridge, wherein the filter cartridge is disposed within the filter chamber; A rotary drive assembly, connected to the filter cartridge, is used to drive the filter cartridge to rotate; A control component is connected to the negative pressure filtration container. 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 filtration chamber is high resistance, so as to control the rotation speed of the filter cartridge to the desired rotation speed. The method includes: The pressure difference between the inlet pipe and the outlet pipe of the negative pressure filter container is obtained by a differential pressure sensor group. The flow rate of the dust-laden airflow in the filter chamber is obtained through a flow acquisition element; Based on the flow rate of the dust-laden airflow in the filter chamber and the pressure difference between the inlet and outlet pipes, determine whether the filter chamber is in a high-resistance state. If the resistance state of the filter chamber is determined to be high resistance, then the rotary drive assembly is controlled to drive the filter cartridge to rotate at the desired speed. If the resistance state of the filter chamber is determined to be high resistance, then controlling the filter cartridge to rotate at a desired speed includes: If the filter chamber is in a high-resistance state, the main controller controls the rotation of the filter cartridge. The required rotation speed of the filter cartridge is calculated according to the following formula: （2） In the formula: k is the redundancy coefficient; f is the power supply frequency; G is the number of pole pairs of the rotary drive component; The pressure difference between the dust-laden airflow at the inlet and outlet pipes is obtained by a differential pressure sensor array. The set rated pressure difference between the inlet and outlet pipes. Based on the rotational speed N of the filter cartridge, the required power setting for the rotary drive assembly is determined using the following formula. : （3） In the formula: m is the mass of the filter cartridge; t is the power compensation coefficient, taken as 1.25; N is the rotational speed of the filter cartridge; Take 3.14; R is the radius of the filter cartridge; These are the efficiency of the rotary drive assembly and the transmission efficiency, respectively. According to the power The rotation speed of the filter cartridge is controlled to the desired speed.

2. The negative pressure filtration dust removal method suitable for humid environments according to claim 1, characterized in that, Based on the flow rate of the dust-laden airflow and the pressure difference between the inlet and outlet pipes, determine whether the filter chamber is in a high-resistance state, including: Determine the resistance state of the filter chamber according to formula (1); In the case of a high-resistance state, the filter cartridge rotation mode is activated; in the case of a low-resistance state, the filter cartridge remains stationary and the rotation drive component stops working. （1） in, , These represent the pressure difference and flow rate of the dust-laden airflow as it passes through the clean filter cartridge. , These represent the pressure difference and flow rate of the dust-laden airflow as it passes through the filter cartridge.

3. The negative pressure filtration dust removal method suitable for humid environments according to claim 1, characterized in that, The negative pressure filtration dust removal system suitable for humid environments also includes an ash removal subsystem, which includes an ash removal valve and an ash removal chamber, the ash removal chamber being connected to the ash removal valve; the ash removal subsystem is located at the bottom of the negative pressure filter container and is configured to remove the dust after the dust falling from the filter cartridge reaches a predetermined weight; The dust removal method further includes: monitoring the weight of dust falling from the filter cartridge in the ash discharge chamber. The rated weight of dust in the ash discharge chamber is set as follows: ,when ≥ At that time, the dust in the ash unloading chamber is unloaded.

4. The negative pressure filtration dust removal method suitable for humid environments according to claim 3, characterized in that, The dust removal operation in the dust removal chamber includes: Obtain the pulse jet volume Q1; The main control unit opens the ash discharge valve and the pulse valve, and adjusts the compressed air to be sprayed from the blow pipe to the ash discharge valve according to the pulse jet volume Q1. The pulse jet volume Q1 of the compressed air is calculated using the following formula: （4） Where l is the pulse jet volume compensation coefficient. S represents the required blowing volume per unit area of ​​the ash discharge valve, where S is the area of ​​the ash discharge valve. This refers to the weight of the dust accumulated in the ash unloading chamber. The rated weight of dust in the ash discharge chamber.

5. The negative pressure filtration dust removal method suitable for humid environments according to claim 1, characterized in that, Also includes: The heater raises the temperature of the dust-laden airflow entering the filter chamber. Among them, the relative humidity (RH) of the dust-laden airflow in the inlet duct is lower than the predetermined value, and the temperature change required for the dust-laden airflow to increase in temperature is [value missing]. It is calculated using the following formula: （5） In the formula: V represents the pressure difference between the dust-laden airflow in the inlet pipe and the outlet channel, and V is the volume of the filter chamber. Let be the density of the dust-laden gas flow, r be the gas constant of the dust-laden gas flow, and Q be the flow rate of the dust-laden gas. This refers to the set relative humidity rating.

6. The negative pressure filtration dust removal method suitable for humid environments according to claim 1, characterized in that, The negative pressure filtration dust removal system suitable for humid environments also includes: a brushing component disposed on one side of the filter cartridge for brushing off dust on the filter cartridge; The first pulse jet cleaning subsystem includes a first jet pipe, a first pulse valve, a first air tank, and a first nozzle. The first jet pipe is connected to the first pulse valve, the first air tank, and the first nozzle. 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. The method further includes: closing the vent valve and opening the first pulse jet cleaning subsystem, wherein the first pulse jet cleaning subsystem performs jet cleaning on the filter cartridge according to the set jet air volume; The first pulse jet cleaning subsystem sets the air volume for each pulse jet by formula (7), and controls the jet volume by controlling the pressure of the first air tank. When the first air tank reaches the rated pressure value, the first pulse valve is closed. Based on this, the rated pressure value to be set for the first air tank is calculated according to formula (8). （7） In the formula: The required blowing volume per unit area of ​​filter material on the filter cartridge is 10L; n is the number of the first nozzles. The pressure difference between the dust-laden airflow at the outlet and inlet pipes of the dust removal system is obtained by the differential pressure sensor group. Take 3.14; d is the diameter of the filter cartridge; L is the height of the filter cartridge; （8） In the formula: Q2 is the amount of air injected each time; The static pressure inside the first gas storage tank (19) before injection, The set rated pressure value inside the first gas storage tank is obtained by the pressure sensor in the first gas storage tank; ρ is standard atmospheric pressure; V is the volume of the first gas storage tank.

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