Cloth bag dust removal device with ash removal function

Abstract

The utility model relates to the technical field of cloth bag dust removal, and provides a cloth bag dust removal device with an ash removal function, which comprises a dust removal box, a plurality of dust removal chambers are constructed in the dust removal box, each dust removal chamber is provided with a dust removal unit, and the lower part of each dust removal chamber is communicated with an air inlet pipeline; a first control valve is arranged on the air inlet pipeline, an air outlet pipeline is connected to the upper part of each dust removal chamber, and the air outlet pipeline is communicated with the dust removal unit; each dust removal chamber is provided with an ash removal assembly, each ash removal assembly comprises an ash removal pipe and a second control valve arranged on the ash removal pipe, the ash removal pipes are connected with the upper ends of the dust removal units, and the second ends of the ash removal pipes are connected with an external air source. According to the embodiment of the utility model, the plurality of dust removal bins are constructed in the dust removal box, dust removal can be carried out on the corresponding dust removal units in one or more dust removal bins, and dust removal can be carried out on the corresponding dust removal units in other dust removal bins normally, so that shutdown is not needed in the dust removal process of the dust removal units, and the working efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bag dust removal, in particular to a bag dust removal device with a dust cleaning function. Background Art

[0002] At present, the most efficient dust removal technology in the industries of steel, metallurgy, coking and thermal power plants is bag dust removal, so it is the most widely used. Bag dust removal adopts the bag dust removal method. After the denitrification flue gas is heated by the economizer (the flue gas temperature is 100 - 160 °C), it enters the bag dust collector for dust removal treatment. The bag filter is a dry dust filtering device, which is suitable for collecting fine, dry and non-fibrous dust. The filter bag is made of woven filter cloth or non-woven felt. The fibrous fabric is used to filter the dust-containing gas. When the dust-containing gas enters the bag filter, the dust with large particles and high specific gravity settles down due to the action of gravity and falls into the ash hopper. When the gas containing finer dust passes through the filter material, the dust is retained and the gas is purified.

[0003] In the prior art, after the bag filter is used for a period of time, the filter bag of the dust collector will be blocked by dust, and it is necessary to open the dust collector to remove the filter bag for cleaning. The cleaning process is rather cumbersome, consuming a lot of manpower, and the bag filter needs to be shut down, which affects the working efficiency. Summary of the Utility Model

[0004] The utility model provides a bag dust removal device with a dust cleaning function to solve the defect that the cleaning process of the filter bag of the dust collector in the prior art is rather cumbersome and the shutdown affects the working efficiency.

[0005] The utility model provides a bag dust removal device with a dust cleaning function, including:

[0006] A dust removal box, in which a plurality of dust removal chambers arranged side by side are constructed. Each dust removal chamber is provided with a dust removal unit. The lower part of each dust removal chamber is communicated with an air inlet pipeline, and a first control valve is arranged on the air inlet pipeline. The upper part of each dust removal chamber is connected with an air outlet pipeline, and the air outlet pipeline is communicated with the dust removal unit;

[0007] Each dust removal chamber is provided with a dust cleaning component, and the dust cleaning component includes a dust cleaning pipe and a second control valve arranged on the dust cleaning pipe. The first end of the dust cleaning pipe is connected to the upper end of the dust removal unit, and the second end of the dust cleaning pipe is connected to an external air source.

[0008] According to a bag dust removal device with a dust cleaning function provided by an embodiment of the utility model, the dust removal box is provided with an air inlet and an air outlet. The air inlet is communicated with all the air inlet pipelines, and the air outlet is communicated with all the air outlet pipelines;

[0009] A differential pressure measuring element is arranged between the air inlet and the air outlet.

[0010] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, the differential pressure measuring element is electrically connected to a controller, and the controller is electrically connected to an alarm.

[0011] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, the controller is electrically connected to the first control valve and the second control valve.

[0012] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, the first control valve is electrically connected to a switch in-place feedback member, and the switch in-place feedback member is used to monitor the working state of the first control valve.

[0013] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, the dust removal unit includes a plurality of dust removal bags arranged in the dust removal chamber, and each dust removal bag is connected to the dust cleaning assembly.

[0014] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, the second control valve is a pulse valve.

[0015] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, all the pulse valves on each dust removal chamber are arranged on a steam drum.

[0016] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, all the pulse valves on each dust removal chamber are electrically connected to a pulse controller.

[0017] According to a bag dust collector with a dust cleaning function provided by an embodiment of the present invention, an air inlet passage is constructed at the lower part of the dust removal box, the first end of the air inlet passage is communicated with the air inlet, and the second end of the air inlet passage is respectively communicated with all the air inlet pipelines;

[0018] An air outlet passage is constructed at the upper part of the dust removal box, the first end of the air outlet passage is communicated with the air outlet, and the second end of the air outlet passage is respectively communicated with the air outlet pipelines.

[0019] The bag dust collector with a dust cleaning function provided by the embodiment of the present invention isolates the dust-containing gas in the dust removal chamber through the first control valve, and cleans the dust removal unit through the dust cleaning assembly; and a plurality of dust removal chambers are constructed in the dust removal box, and the corresponding dust removal units in one or more of the dust removal chambers can be cleaned, and the corresponding dust removal units in the remaining dust removal chambers can normally perform dust removal, so that it is not necessary to stop the machine during the cleaning process of one or more dust removal units, thereby improving the working efficiency. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the attached drawings required for use in the description of the embodiments or the prior art. Obviously, the attached drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0021] Figure 1 It is a schematic diagram of the principle structure of a bag dust removal device with a dust cleaning function provided by an embodiment of the present utility model;

[0022] Figure 2 It is a schematic diagram of the principle layout structure of a bag dust removal device with a dust cleaning function provided by an embodiment of the present utility model;

[0023] Figure 3 It is a schematic diagram of the external structure of a bag dust removal device with a dust cleaning function provided by an embodiment of the present utility model;

[0024] Figure 4 It is a schematic diagram of the internal structure of a bag dust removal device with a dust cleaning function provided by an embodiment of the present utility model;

[0025] Figure 5 It is provided by an embodiment of the present utility model Figure 4 The partial enlarged structure schematic diagram at position A in

[0026] Reference numerals:

[0027] 1. Dust removal box; 101. 1# dust removal chamber; 102. 2# dust removal chamber; 103. 3# dust removal chamber; 104. 4# dust removal chamber; 105. 5# dust removal chamber; 106. 6# dust removal chamber;

[0028] 12. Air inlet; 13. Air outlet; 14. Air inlet channel; 15. Air outlet channel;

[0029] 201. 1# dust removal unit; 202. 2# dust removal unit; 203. 3# dust removal unit; 204. 4# dust removal unit; 205. 5# dust removal unit; 206. 6# dust removal unit;

[0030] 21. Dust removal bag;

[0031] 301. 1# first control valve; 302. 2# first control valve; 303. 3# first control valve; 304. 4# first control valve; 305. 5# first control valve; 306. 6# first control valve;

[0032] 41. Dust cleaning pipe; 421. 1# Second control valve; 422. 2# Second control valve; 423. 3# Second control valve; 424. 4# Second control valve; 425. 5# Second control valve; 426. 6# Second control valve; 43. Steam drum; 44. Pulse controller;

[0033] 5. Differential pressure measuring element. Specific implementation mode

[0034] The following further describes the implementation mode of the present utility model in detail in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0035] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0037] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0039] The following will describe the bag dust removal device with ash cleaning function according to the embodiments of the present utility model in conjunction with Figures 1 - 5 the description.

[0040] An embodiment of the present utility model provides a bag dust removal device with an ash cleaning function. As Figures 1 to 4 shown, the bag dust removal device with an ash cleaning function includes a dust removal box 1, a dust removal unit, a first control valve, and an ash cleaning component. The interior of the dust removal box 1 is constructed with a plurality of dust removal chambers arranged side by side. Each dust removal chamber is provided with a dust removal unit. The lower part of each dust removal chamber is communicated with an intake pipeline, and a first control valve is arranged on the intake pipeline. The upper part of each dust removal chamber is connected with an exhaust pipeline, and the exhaust pipeline is communicated with the dust removal unit; each dust removal chamber is provided with an ash cleaning component for cleaning the dust removal unit. The ash cleaning component includes an ash cleaning pipe 41 and a second control valve. The first end of the ash cleaning pipe 41 is connected to the upper end of the dust removal unit, the second end of the ash cleaning pipe 41 is connected to an external gas source, and a second control valve is arranged on the ash cleaning pipe 41.

[0041] It can be understood that the interior of the dust removal box 1 is constructed with a plurality of dust removal chambers, and the numbers of the dust removal unit, the first control valve, and the ash cleaning component are all adapted to the number of dust removal chambers. In this embodiment, taking six dust removal chambers as an example, correspondingly, the numbers of the dust removal unit, the first control valve, and the ash cleaning component are all six and are in one-to-one correspondence with the dust removal chambers.

[0042] It can be understood that the lower part of each dust removal chamber is communicated with an intake pipeline, a dust removal unit is arranged inside the dust removal chamber, and the upper part of each dust removal chamber is connected with an exhaust pipeline. Then, the dust-containing gas enters the interior of the dust removal chamber through the intake pipeline. The dust removal unit filters the dust-containing gas. The filtered clean gas is located inside the dust removal unit and is discharged through the exhaust pipeline, thereby realizing the filtration of the dust-containing gas.

[0043] It can be understood that after the bag dust removal device of this embodiment has been used for a period of time, if the dust removal bag 21 of the dust removal unit is blocked by dust, the first control valve on the intake pipe is closed, and the second control valve on the dust cleaning pipe 41 is opened to clean the dust removal bag 21 of the corresponding dust removal unit.

[0044] It can be understood that the first control valve is used to isolate the dust-containing gas from entering the corresponding dust removal chamber, and the second control valve is used to clean the dust removal bag 21 of the dust removal unit. When the working state of the bag dust removal device of this embodiment is dust removal, the first control valve is in the open state and the second control valve is in the closed state; when the working state of the bag dust removal device of this embodiment is dust cleaning, the first control valve is in the closed state and the second control valve is in the open state.

[0045] It should be noted that the interior of the dust removal box 1 is constructed with multiple dust removal chambers, and one or more of the corresponding dust removal units in the dust removal chambers can be cleaned.

[0046] The bag dust removal device with a dust cleaning function provided by the embodiment of the present utility model isolates the dust-containing gas in the dust removal chamber through the first control valve, and cleans the dust removal unit through the dust cleaning component. The dust cleaning process is relatively simple; and the dust removal box 1 is internally constructed with multiple dust removal chambers, and one or more of the corresponding dust removal units in the dust removal chambers can be cleaned, and the corresponding dust removal units in the remaining dust removal chambers can normally perform dust removal, so that it is not necessary to stop the machine during the dust cleaning process of one or more dust removal units, thereby improving work efficiency.

[0047] In the embodiment of the present utility model, as Figure 4 shown, the dust removal box 1 is provided with an air inlet 12 and an air outlet 13. The air inlet 12 is communicated with all the intake pipes, and the air outlet 13 is communicated with all the outlet pipes.

[0048] It can be understood that an intake passage 14 is constructed at the lower part of the dust removal box 1. The first end of the intake passage 14 is communicated with the air inlet 12, and the second end of the intake passage 14 is respectively communicated with all the intake pipes; an air outlet passage 15 is constructed at the upper part of the dust removal box 1. The first end of the air outlet passage 15 is communicated with the air outlet 13, and the second end of the air outlet passage 15 is respectively communicated with the outlet pipes.

[0049] It can be understood that the intake pipe is a pipe connecting the dust removal chamber and the intake passage 14, and the first control valve is arranged on the intake passage 14. The air outlet passage 15 is a pipe connecting the inner cavity of the dust removal bag 21 of the dust removal unit and the air outlet passage 15.

[0050] In the embodiment of the present utility model, a differential pressure measuring element 5 is arranged between the air inlet 12 and the air outlet 13. The differential pressure measuring element 5 is used to measure the differential pressure between the air inlet 12 and the air outlet 13 of the dust removal box 1, and based on this differential pressure value, it is judged whether it is necessary to clean the dust removal unit.

[0051] It is understandable that whether to start dust cleaning is determined according to the measured pressure difference value measured by the differential pressure measuring element 5, which specifically includes the following:

[0052] Compare the measured pressure difference value with the preset value;

[0053] When the measured pressure difference value is greater than or equal to the preset value, it indicates that the pressure difference between the air inlet 12 and the air outlet 13 of the dust removal box 1 is large, and there is more dust on the dust removal unit. Start the dust cleaning work, then close the first control valve and open the second control valve to clean the dust removal unit;

[0054] When the measured pressure difference value is less than the preset value, it indicates that the pressure difference between the air inlet 12 and the air outlet 13 of the dust removal box 1 is within a suitable range, and there is less dust on the dust removal unit, which will not affect the dust removal work of the dust removal unit. The first control valve remains in the open state and the second control valve is in the closed state.

[0055] It should be noted that the internal structure of the dust removal box 1 has multiple dust removal chambers, and a dust removal unit is arranged in each dust removal chamber. When the measured pressure difference value is greater than or equal to the preset value, the multiple dust removal units are cleaned in sequence, and the corresponding first control valves are closed and the second control valves are opened in sequence.

[0056] For example, as Figures 1 to 4 shown, the internal structure of the dust removal box 1 has six dust removal chambers, which are the 1# dust removal chamber 101, 2# dust removal chamber 102, 3# dust removal chamber 103, 4# dust removal chamber 104, 5# dust removal chamber 105, and 6# dust removal chamber 106 arranged side by side in sequence. The dust removal units in the six dust removal chambers are the 1# dust removal unit 201, 2# dust removal unit 202, 3# dust removal unit 203, 4# dust removal unit 204, 5# dust removal unit 205, and 6# dust removal unit 206 respectively. The second control valves matched with the six dust removal units are the 1# second control valve 421, 2# second control valve 422, 3# second control valve 423, 4# second control valve 424, 5# second control valve 425, and 6# second control valve 426 respectively. The first control valves matched with the six dust removal chambers are the 1# first control valve 301, 2# first control valve 302, 3# first control valve 303, 4# first control valve 304, 5# first control valve 305, and 6# first control valve 306 respectively.

[0057] When the measured pressure difference value measured by the differential pressure measuring element 5 is greater than the preset value, first close the 1# first control valve 301 and open the 1# second control valve 421 to clean the 1# dust removal unit 201, and complete the cleaning of the 1# dust removal unit 201;

[0058] Open the 1# first control valve 301 and close the 1# second control valve 421 to switch the 1# dust removal unit 201 to the dust cleaning working state, and close the 2# first control valve 302 and open the 2# second control valve 422 to clean the 2# dust removal unit 202, completing the cleaning of the 2# dust removal unit 202;

[0059] Open the 2# first control valve 302 and close the 2# second control valve 422 to switch the 2# dust removal unit 202 to the dust cleaning working state, and close the 3# first control valve 303 and open the 3# second control valve 423 to clean the 3# dust removal unit 203, completing the cleaning of the 3# dust removal unit 203;

[0060] Open the 3# first control valve 303 and close the 3# second control valve 423 to switch the 3# dust removal unit 203 to the dust cleaning working state, and close the 4# first control valve 304 and open the 4# second control valve 424 to clean the 4# dust removal unit 204, completing the cleaning of the 4# dust removal unit 204;

[0061] Open the 4# first control valve 304 and close the 4# second control valve 424 to switch the 4# dust removal unit 204 to the dust cleaning working state, and close the 5# first control valve 305 and open the 5# second control valve 425 to clean the 5# dust removal unit 205, completing the cleaning of the 5# dust removal unit 205;

[0062] Open the 5# first control valve 305 and close the 5# second control valve 425 to switch the 5# dust removal unit 205 to the dust cleaning working state, close the 6# first control valve 306 and open the 6# second control valve 426 to clean the 6# dust removal unit 206, completing the cleaning of the 6# dust removal unit 206, and then open the 6# first control valve 306 and close the 6# second control valve 426 to switch the 6# dust removal unit 206 to the dust removal working state.

[0063] It should be noted that, under normal circumstances, the bag dust removal device should be in the dust removal working state, that is, all the first control valves are in the open state and the second control valves are in the closed state. Only when dust cleaning is required, the first control valve and the second control valve are switched for dust cleaning.

[0064] In an embodiment of the present invention, the differential pressure measuring element 5 is electrically connected to a controller, and the controller is electrically connected to an alarm.

[0065] It can be understood that the controller obtains the measured differential pressure value measured by the differential pressure measuring element 5, and when the measured differential pressure value is greater than or equal to the preset value, the controller sends a trigger signal to the alarm, and the alarm gives an alarm to remind of the dust cleaning operation of the dust removal unit.

[0066] In this embodiment, the differential pressure measuring element 5 can be a differential pressure transmitter, integrated into the control box, and automatically controlled through PLC integration.

[0067] In an embodiment of the present utility model, the controller is electrically connected to the first control valve and the second control valve.

[0068] It can be understood that the actions of the first control valve and the second control valve are automatically controlled by the controller to achieve the automation of dust cleaning.

[0069] It can be understood that the controller can cyclically spray and dust the dust removal unit according to the set time of the timing control to achieve regular dust cleaning.

[0070] The bag dust removal device with a dust cleaning function provided by the embodiment of the present utility model can more stably solve the problem of high differential pressure alarm caused by untimely cleaning of the ash hanging on the dust removal bag 21 of the dust removal unit without increasing the additional equipment cost. At the same time, automatic control is realized, the equipment material cost is reduced, the maintenance and operation cost is reduced, and the effect of cost reduction and efficiency increase is achieved.

[0071] In an embodiment of the present utility model, the first control valve is electrically connected to a switch in-place feedback member, and the switch in-place feedback member is used to monitor the working state of the first control valve.

[0072] It can be understood that the first control valve is an offline dust cleaning valve, and each offline dust cleaning valve is configured with a switch in-place feedback member. The current working state of the offline dust cleaning valve can be effectively reflected through the switch in-place feedback member. After the offline dust cleaning valve is closed, the dust-containing gas in the corresponding dust removal chamber can be isolated, such as flue gas.

[0073] In an embodiment of the present utility model, the dust removal unit includes a plurality of dust removal bags 21 arranged in the dust removal chamber, and each dust removal bag 21 is connected to a dust cleaning pipe 41.

[0074] It can be understood that as Figure 4 shown, each dust removal unit includes a plurality of dust removal bags 21 arranged side by side. If it is necessary to clean each dust removal bag 21, each dust removal bag 21 is connected to a dust cleaning pipe, and a second control valve is arranged on each dust cleaning pipe 41.

[0075] Exemplarily, as Figure 4 and Figure 5 shown, taking the 1# dust removal unit 201 as an example, the 1# dust removal unit 201 includes ten dust removal bags 21. Then, ten dust removal bags 21 are arranged in the 1# dust removal chamber 101. Correspondingly, there are ten dust cleaning pipes and ten 1# second control valves in the 1# dust cleaning assembly. The ten 1# second control valves 421 are respectively connected to the ten dust removal bags 21. When cleaning the dust removal bags 21, the ten 1# second control valves 421 are sequentially opened, so as to sequentially clean the ten dust removal bags 21.

[0076] It should be noted that each dust cleaning pipe 41 is used to clean one dust removal cloth bag 21. Therefore, the number of dust cleaning pipes 41 in the dust cleaning assembly corresponds to the number of dust removal cloth bags 21. A second control valve is provided on each dust cleaning pipe 41. Thus, the number of dust cleaning pipes 41 and second control valves in each dust cleaning assembly corresponds to the number of dust removal cloth bags 21 in the corresponding dust removal unit.

[0077] The bag dust removal device with a dust cleaning function provided by the embodiment of the present utility model can timely shake off the dust attached to the dust removal cloth bag 21 through the dust removal unit, preventing excessive dust and unsmooth flue gas flow, which may cause an increase in the differential pressure of the dust removal device and affect the dust removal efficiency.

[0078] Further, the second control valve is a pulse valve, and all the second control valves corresponding to each dust removal unit are installed on the steam drum 43.

[0079] Further, all the pulse valves on each dust removal chamber are electrically connected to a pulse controller 44.

[0080] It can be understood that all the pulse valves corresponding to each dust removal unit are installed on the steam drum 43 and are centrally wired to the pulse controller 44. The pulse controller 44 can adjust the pulse width and the interval time.

[0081] It should be noted that the pulse width is the power-on time of the pulse valve. That is, by adjusting the pulse width through the pulse controller 44, the working duration of the pulse valve can be adjusted, which is also the adjustment of the dust cleaning time of the dust removal cloth bag 21.

[0082] It should be noted that the multiple dust removal cloth bags 21 in each dust removal unit are cleaned in sequence. By adjusting the interval time through the pulse controller 44, the interval time between adjacent two pulse valves can be realized, which is also the adjustment of the interval time between the dust cleaning of adjacent two dust removal cloth bags 21.

[0083] It can be understood that the pulse controller 44 can communicate with the PLC, and the operating state of the pulse controller 44 can be read through the PLC.

[0084] The following combines Figures 1 to 5 Describe a specific embodiment of the present utility model. The bag dust removal device with a dust cleaning function includes a dust removal box 1, a dust removal unit, a first control valve, and a dust cleaning assembly. The dust removal unit is arranged in the dust removal chamber in the dust removal box 1. The first control valve is communicated with the dust removal chamber. The dust cleaning assembly is connected to the dust removal unit, and the dust cleaning assembly is used to clean the dust removal unit.

[0085] In this embodiment, the interior of the dust removal box 1 is constructed with six dust removal chambers arranged side by side, and the corresponding dust removal units, first control valves, and dust cleaning assemblies are all six.

[0086] The 1# dust removal chamber 101, 2# dust removal chamber 102, 3# dust removal chamber 103, 4# dust removal chamber 104, 5# dust removal chamber 105, and 6# dust removal chamber 106 are arranged side by side in sequence for six dust removal chambers.

[0087] The six dust removal units are respectively the 1# dust removal unit 201, 2# dust removal unit 202, 3# dust removal unit 203, 4# dust removal unit 204, 5# dust removal unit 205, and 6# dust removal unit 206. Each dust removal unit has ten dust removal cloth bags 21.

[0088] The first control valve is an offline cleaning valve. The six first control valves are respectively the 1# offline cleaning valve, 2# offline cleaning valve, 3# offline cleaning valve, 4# offline cleaning valve, 5# offline cleaning valve, and 6# offline cleaning valve.

[0089] The six cleaning components are respectively the 1# cleaning component, 2# cleaning component, 3# cleaning component, 4# cleaning component, 5# cleaning component, and 6# cleaning component. Each cleaning component includes ten cleaning pipes 41 and ten second control valves correspondingly arranged on the cleaning pipes 41. The second control valve is a pulse valve. Correspondingly, the 1# cleaning component includes the 1# cleaning pipe and the 1# pulse valve arranged on the 1# cleaning pipe. The ten 1# pulse valves are installed on the steam drum 43 and are centrally wired to the 1# pulse controller 44; the 2# cleaning component includes the 2# cleaning pipe and the 2# pulse valve arranged on the 2# cleaning pipe. The ten 2# pulse valves are installed on the steam drum 43 and are centrally wired to the 2# pulse controller 44; the 3# cleaning component includes the 3# cleaning pipe and the 3# pulse valve arranged on the 3# cleaning pipe. The ten 3# pulse valves are installed on the steam drum 43 and are centrally wired to the 3# pulse controller 44; the 4# cleaning component includes the 4# cleaning pipe and the 4# pulse valve arranged on the 4# cleaning pipe. The ten 4# pulse valves are installed on the steam drum 43 and are centrally wired to the 4# pulse controller 44; the 5# cleaning component includes the 5# cleaning pipe and the 5# pulse valve arranged on the 5# cleaning pipe. The ten 5# pulse valves are installed on the steam drum 43 and are centrally wired to the 5# pulse controller 44; the 6# cleaning component includes the 6# cleaning pipe and the 6# pulse valve arranged on the 6# cleaning pipe. The ten 6# pulse valves are installed on the steam drum 43 and are centrally wired to the 6# pulse controller 44;

[0090] The working principle of the bag dust removal device with cleaning function of the present utility model:

[0091] When the measured pressure difference value measured by the pressure difference measuring element 5 is greater than or equal to the preset value, the controller sends a trigger signal to the alarm, and the alarm gives an alarm. Thus, when the bag dust removal device has a differential pressure alarm situation, first close the 1# offline cleaning valve and open the 1# pulse valve to clean the 1# dust removal unit 201. After completing the cleaning of the 1# dust removal unit 201, then sequentially clean the 2# dust removal unit 202 to the 6# dust removal unit 206.

[0092] When there is no differential pressure alarm in the bag dust removal device, that is, when the measured differential pressure value measured by the differential pressure measuring element 5 is less than the preset value, during normal operation, the ash cleaning of the 1# dust removal unit 201 to the 6# dust removal unit 206 is carried out sequentially at regular intervals according to the set time interval.

[0093] It should be noted that according to whether the differential pressure triggers an alarm, if the measured differential pressure value measured by the differential pressure measuring element 5 triggers the alarm of the alarm device, it is preferably to start the injection and ash cleaning; if the differential pressure alarm is not triggered, it is cyclically injected according to the set time of the timing control, so as to control and execute the ash cleaning in two ways, namely timing and constant pressure. Timing is the above-mentioned cyclic injection according to the set time of the timing control, and constant pressure is that the measured differential pressure value measured by the differential pressure measuring element 5 triggers the alarm of the alarm device. Among them, the differential pressure alarm has a higher priority.

[0094] Specifically, the ash cleaning control sequence of the 1# dust removal unit 201 to the 6# dust removal unit 206 is as follows:

[0095] S1. The 1# offline ash cleaning valve is closed;

[0096] S2. The 1# pulse controller 44 is powered on, and the ten 1# pulse valves are opened in sequence to clean the ten dust removal bags 21 of the 1# dust removal unit 201 in sequence;

[0097] S3. After the operation of the 1# pulse controller 44 is completed, the 1# offline ash cleaning valve is opened, and after 5S (the time is adjustable);

[0098] S4. The 2# offline ash cleaning valve is closed;

[0099] S5. The 2# pulse controller 44 is powered on, and the ten 2# pulse valves are opened in sequence to clean the ten dust removal bags 21 of the 2# dust removal unit 202 in sequence;

[0100] S6. After the operation of the 2# pulse controller 44 is completed, the 2# offline ash cleaning valve is opened, and after 5S (the time is adjustable);

[0101] S7. The 3# offline ash cleaning valve is closed;

[0102] S8. The 3# pulse controller 44 is powered on, and the ten 3# pulse valves are opened in sequence to clean the ten dust removal bags 21 of the 3# dust removal unit 203 in sequence;

[0103] S9. After the operation of the 3# pulse controller 44 is completed, the 3# offline ash cleaning valve is opened, and after 5S (the time is adjustable);

[0104] S10. The 4# offline ash cleaning valve is closed;

[0105] S11. The 4# pulse controller 44 is powered on, and the ten 4# pulse valves are opened in sequence to clean the dust bags 21 of the ten dust removal units 204 of the 4# one by one;

[0106] S12. After the 4# pulse controller 44 finishes running, open the 4# offline cleaning valve, and after 5S (time adjustable);

[0107] S13. The 5# offline cleaning valve is closed;

[0108] S14. The 5# pulse controller 44 is powered on, and the ten 5# pulse valves are opened in sequence to clean the dust bags 21 of the ten dust removal units 205 of the 5# one by one;

[0109] S15. After the 5# pulse controller 44 finishes running, open the 5# offline cleaning valve, and after 5S (time adjustable);

[0110] S16. The 6# offline cleaning valve is closed;

[0111] S17. The 6# pulse controller 44 is powered on, and the ten 6# pulse valves are opened in sequence to clean the dust bags 21 of the ten dust removal units 206 of the 6# one by one;

[0112] S18. After the 6# pulse controller 44 finishes running, open the 6# offline cleaning valve to complete the cleaning of the dust removal units 201 to 206 of the 1#.

[0113] It should be noted that the bag dust removal device in this embodiment can start to execute a cycle (S1 - S18) every 30 minutes (time adjustable).

[0114] The bag dust removal device with a cleaning function provided by the embodiment of the present utility model can ensure the normal operation of cleaning, and can timely shake off the dust attached to the dust bags 21, preventing excessive dust, unsmooth flue gas flow, and increased differential pressure resulting in a decrease in dust removal efficiency.

[0115] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A bag dust removal device with dust cleaning function, characterized in that: include: A dust removal box (1), wherein the dust removal box (1) is internally structured with a plurality of dust removal chambers arranged side by side, each of the dust removal chambers being provided with a dust removal unit, the lower portion of each of the dust removal chambers being connected to an air inlet pipeline, the air inlet pipeline being provided with a first control valve, and the upper portion of each of the dust removal chambers being connected to an air outlet pipeline, the air outlet pipeline being connected to the dust removal unit; Each dust removal chamber is provided with a cleaning component, which includes a cleaning pipe (41) and a second control valve arranged on the cleaning pipe (41), the first end of the cleaning pipe (41) is connected to the upper end of the dust removal unit, and the second end of the cleaning pipe (41) is connected to an external air source.

2. The bag dust removal device with dust cleaning function according to claim 1 is characterized in that: The dust removal box (1) is provided with an air inlet (12) and an air outlet (13), the air inlet (12) is connected to all air inlet pipelines, and the air outlet (13) is connected to all air outlet pipelines; A pressure difference measuring element (5) is provided between the air inlet (12) and the air outlet (13).

3. The bag dust removal device with dust cleaning function according to claim 2 is characterized in that: The differential pressure measuring element (5) is electrically connected to a controller, and the controller is electrically connected to an alarm.

4. The bag dust removal device with dust cleaning function according to claim 3 is characterized in that: The controller is electrically connected to the first control valve and the second control valve.

5. The bag dust removal device with dust cleaning function according to claim 3 is characterized in that: The first control valve is electrically connected to a switch position feedback component, and the switch position feedback component is used to monitor the working state of the first control valve.

6. The bag dust removal device with dust cleaning function according to any one of claims 1 to 5, characterized in that: The dust removal unit comprises a plurality of dust removal bags (21) arranged in the dust removal chamber, and each dust removal bag (21) is connected to the dust cleaning component.

7. The bag dust removal device with dust cleaning function according to claim 6 is characterized in that: The second control valve is a pulse valve.

8. The bag dust removal device with dust cleaning function according to claim 6, characterized in that: All pulse valves on each dust removal chamber are arranged on the steam drum (43).

9. The bag dust removal device with dust cleaning function according to claim 6, characterized in that: All pulse valves on each dust removal chamber are electrically connected to a pulse controller (44).

10. The bag dust removal device with dust cleaning function according to any one of claims 2 to 5, characterized in that: The lower part of the dust removal box (1) is provided with an air intake channel (14), a first end of the air intake channel (14) is in communication with the air intake port (12), and a second end of the air intake channel (14) is in communication with all air intake pipelines respectively; An air outlet channel (15) is structured on the upper part of the dust removal box (1), a first end of the air outlet channel (15) is connected to the air outlet port (13), and a second end of the air outlet channel (15) is respectively connected to the air outlet pipeline.

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