A dust removal system and a control method thereof, and a gypsum board production line

Abstract

The application provides a dust removal system and a control method thereof and a gypsum board production line. The dust removal system comprises a dust collector provided with N groups of pulse valves; an air compressor and a total gas storage device, an air inlet of the total gas storage device being in communication with the air compressor; N electric control valves, one end of each of the electric control valves being in communication with one of the N groups of pulse valves one by one, and the other end of each of the electric control valves being in communication with an air outlet of the total gas storage device; a pressure detection device arranged in the total gas storage device; and a control device arranged to record the electric control valves in an open state based on the pressure in the total gas storage device being not greater than a pressure threshold value, and to close the recorded electric control valves one by one at a set time interval until the pressure in the total gas storage device recovers to be greater than the pressure threshold value within a set time interval after closing of a certain electric control valve, and then to control the last closed electric control valve to maintain a closed state and control all the remaining recorded electric control valves to be opened. The scheme is suitable for the abnormal situations of single group and multiple groups of pulse valves.

Description

Technical Field

[0001] This invention relates to the field of gypsum board production technology, and more specifically, to a dust removal system and its control method, and a gypsum board production line. Background Technology

[0002] Paper-faced gypsum board is a lightweight building material mainly made of gypsum and facing paper as the main raw materials, mixed with water, foaming agent, accelerator, starch, fiber and other auxiliary materials. It has the characteristics of heat insulation, light weight, sound insulation, fire resistance, good decorative performance, convenient construction, space saving, energy saving and environmental protection.

[0003] In the gypsum board production process, a dust removal system is needed to collect and transport the powder during the material preparation stage. This system includes a baghouse dust collector and an air compressor. The baghouse dust collector has 144 pulse valves connected in parallel, and the air compressor is connected to all 144 pulse valves. However, if any pulse valve malfunctions (a damaged pulse valve will continuously discharge air), it will cause insufficient air pressure in the air compressor, preventing other normal pulse valves from performing pulse blowing properly. Summary of the Invention

[0004] This invention provides a dust removal system, comprising: a dust collector equipped with N sets of pulse valves; an air compressor and a main air storage device, wherein the air inlet of the main air storage device is connected to the air compressor; N electrically controlled valves, one end of each of the N electrically controlled valves being connected to one of the N sets of pulse valves, and the other end of each of the N electrically controlled valves being connected to the air outlet of the main air storage device; a pressure detection device disposed in the main air storage device and configured to detect the internal pressure of the main air storage device; and a control device, wherein the pressure detection device and the N electrically controlled valves are electrically connected to the control device, and the control device is configured to, based on the condition that the internal pressure of the main air storage device is not greater than a pressure threshold, record the electrically controlled valves that are in the open state, and close the recorded electrically controlled valves one by one at a set time interval until the set condition is met, then control the last closed electrically controlled valve to remain closed, and control all the remaining recorded electrically controlled valves to be open; wherein, the set condition is that the internal pressure of the main air storage device recovers to a pressure threshold within the set time interval after closing a certain electrically controlled valve.

[0005] In some exemplary embodiments, the dust removal system further includes: N gas distribution and storage devices, wherein the air inlets of the N gas distribution and storage devices are connected to one end of each of the N electrically controlled valves, and the air outlets of the N gas distribution and storage devices are connected to each of the N sets of pulse valves.

[0006] In some exemplary embodiments, the dust removal system further includes an alarm device electrically connected to the control device, configured to output alarm information based on the pressure inside the total gas storage device being lower than a set pressure.

[0007] In some exemplary embodiments, the dust removal system further includes a display device electrically connected to the control device, configured to display identification information for characterizing an electrically controlled valve that maintains a closed state.

[0008] In some exemplary embodiments, each group of pulse valves includes one pulse valve or multiple pulse valves arranged in parallel.

[0009] In some exemplary embodiments, both the main gas storage device and the sub-gas storage devices are gas storage bags.

[0010] This invention also provides a control method for a dust removal system, comprising: recording the electrically controlled valves that are in the open state based on the pressure inside the total gas storage device not exceeding a pressure threshold, and closing the recorded electrically controlled valves one by one at set time intervals until a set condition is met; then controlling the last closed electrically controlled valve to remain closed, and controlling all the remaining recorded electrically controlled valves to open; wherein, the set condition is that the pressure inside the total gas storage device recovers to a pressure threshold within the set time interval after closing a certain electrically controlled valve.

[0011] In some exemplary embodiments, prior to the step of basing the control method on the pressure inside the total gas storage device not exceeding a pressure threshold, the control method further includes: opening N electrically controlled valves.

[0012] In some exemplary embodiments, after the step of determining that the pressure inside the total gas storage device is not greater than a pressure threshold, the control method further includes: controlling the alarm device to output alarm information.

[0013] In some exemplary embodiments, after the step of then controlling the last closed electronically controlled valve to remain in a closed state, the control method further includes: controlling a display device to display identification information for characterizing the electronically controlled valve that remains in a closed state.

[0014] This invention also provides a gypsum board production line, including the dust removal system described in any of the above embodiments.

[0015] The dust removal system proposed in this invention uses a pressure detection device to detect the pressure inside the main air storage device. If all pulse valves are normal, the pressure inside the main air storage device is greater than the pressure threshold. If an abnormal pulse valve is present, the pressure inside the main air storage device (due to the continuous exhaust from the abnormal pulse valve) is not greater than the pressure threshold. When the pressure inside the main air storage device is not greater than the pressure threshold, the control device records the electrically controlled valves that are in the open state and closes the recorded electrically controlled valves one by one at set time intervals until the pressure inside the main air storage device recovers to a level greater than the pressure threshold within the set time interval after closing a certain electrically controlled valve. Then, the last electrically controlled valve to be closed is kept closed, and all other recorded electrically controlled valves are opened. This solution is not only suitable for troubleshooting situations where only a single group of pulse valves is abnormal, but also, by repeating the process, suitable for troubleshooting situations where multiple groups of pulse valves are abnormal. Moreover, the repair of abnormal pulse valves will not affect the normal pulse blowing of normal pulse valves.

[0016] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0018] Figure 1 This is a schematic block diagram of the dust removal system described in some embodiments;

[0019] Figure 2 This is a flowchart of a control method for a dust removal system as described in some embodiments.

[0020] The correspondence between the reference numerals and the component names is as follows:

[0021] 200 air compressor, 300 main air storage device, 400 electric control valve, 500 sub-air storage device. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0023] This invention provides a dust removal system, such as... Figure 1As shown, it includes: a dust collector equipped with N sets of pulse valves; an air compressor 200 and a main air storage device 300, the air inlet of the main air storage device 300 being connected to the air compressor 200; N electrically controlled valves 400, one end of each of the N electrically controlled valves 400 being connected to one of the N sets of pulse valves, and the other end of each of the N electrically controlled valves 400 being connected to the air outlet of the main air storage device 300; a pressure detection device, located in the main air storage device 300, configured to detect the pressure inside the main air storage device 300; and a control device, comprising the pressure detection device and the N sets of pulse valves 400. All electrically controlled valves 400 are electrically connected to the control device. The control device is configured to record the electrically controlled valves 400 that are in the open state based on the pressure inside the total gas storage device 300 not exceeding a pressure threshold, and then close the recorded electrically controlled valves 400 one by one at set time intervals until the set condition is met. Then, it controls the last closed electrically controlled valve 400 to remain closed, and controls all the remaining recorded electrically controlled valves 400 to open. The set condition is that the pressure inside the total gas storage device 300 recovers to a pressure threshold within a set time interval after a certain electrically controlled valve 400 is closed.

[0024] In this dust removal system, the pressure detection device monitors the pressure inside the main air storage device 300. If all pulse valves are normal, the pressure inside the main air storage device 300 is greater than the pressure threshold. If an abnormal pulse valve is present, the pressure inside the main air storage device 300 (due to the continuous exhaust from the abnormal pulse valve) is not greater than the pressure threshold. When the pressure inside the main air storage device 300 is not greater than the pressure threshold, the control device records the electrically controlled valves 400 that are in the open state and closes the recorded electrically controlled valves 400 one by one at set time intervals until the pressure inside the main air storage device 300 recovers to a level greater than the pressure threshold within the set time interval after closing a certain electrically controlled valve 400. Then, the last electrically controlled valve 400 that was closed is kept closed, and all other recorded electrically controlled valves 400 are opened. This scheme is not only suitable for troubleshooting situations where only a single group of pulse valves is abnormal, but also, by repeating the process, suitable for troubleshooting situations where multiple groups of pulse valves are abnormal. Moreover, the maintenance of abnormal pulse valves will not affect the normal pulse blowing of normal pulse valves.

[0025] The time interval can be set to 30s, 60s, 120s, etc. Those skilled in the art can make reasonable settings as needed, as long as the pressure inside the total gas storage device 300 can be restored to above the pressure threshold within the set time interval after the electronically controlled valve 400 of the control abnormal group pulse valve is completely closed (preferably restored to the set pressure of the air compressor 200, the set pressure of the air compressor 200 is greater than the pressure threshold).

[0026] In some embodiments, the air compressor 200 is set to a pressure of 4 kg to 6 kg and a pressure threshold of 3 kg to 5 kg. Alternatively, the air compressor 200 may be set to a pressure of 4 kg and a pressure threshold of 3 kg; or the air compressor 200 may be set to a pressure of 5 kg and a pressure threshold of 4 kg; or the air compressor 200 may be set to a pressure of 6 kg and a pressure threshold of 5 kg, etc. All of the above can achieve the purpose of this application, and their intent does not depart from the design concept of this invention. Therefore, they will not be elaborated further here, and all should fall within the protection scope of this application.

[0027] In some examples, such as Figure 1 As shown, the dust removal system also includes: N separate air storage devices 500, the air inlets of the N separate air storage devices 500 are connected to one end of the N electrically controlled valves 400, and the air outlets of the N separate air storage devices 500 are connected to the N sets of pulse valves. This can better ensure that the pulse blowing effect of different sets of pulse valves is roughly the same.

[0028] In some examples, the dust removal system also includes an alarm device electrically connected to the control device, which is configured to output an alarm message based on the pressure inside the main gas storage device 300 being lower than a set pressure, so as to ensure that operators / maintenance personnel are aware of any abnormal pulse valves as soon as possible.

[0029] In some examples, the dust removal system also includes a display device electrically connected to the control device, configured to display identification information for the electrically controlled valve 400 that is maintained in a closed state, so as to ensure that operators / maintenance personnel know immediately which group of pulse valves the malfunctioning pulse valve is located in.

[0030] Each group of pulse valves may consist of one pulse valve; or each group of pulse valves may consist of multiple pulse valves connected in parallel. Both of these methods can achieve the purpose of this application, and their intent does not depart from the design concept of this invention. They will not be elaborated further here, and should all fall within the protection scope of this application.

[0031] In some embodiments, N is set to 8, and each group of pulse valves includes 18 pulse valves arranged in parallel.

[0032] In some embodiments, the main gas storage device 300 and the sub-gas storage device 500 are both configured as gas storage bags or gas storage tanks, the pressure detection device is configured as a pressure sensor, the electric control valve 400 is configured as a solenoid valve, and the dust collector is a bag dust collector. All of the above can achieve the purpose of this application, and their purpose has not departed from the design concept of this invention. They will not be described in detail here, and all should fall within the protection scope of this application.

[0033] This invention also provides a control method for a dust removal system, comprising: recording the electrically controlled valves 400 that are in the open state based on the pressure inside the total gas storage device 300 not exceeding a pressure threshold, and closing the recorded electrically controlled valves 400 one by one at a set time interval until a set condition is met; then controlling the last closed electrically controlled valve 400 to remain closed, and controlling all the remaining recorded electrically controlled valves 400 to open; wherein, the set condition is that the pressure inside the total gas storage device 300 recovers to a pressure threshold within a set time interval after closing a certain electrically controlled valve 400.

[0034] The pressure detection device detects the pressure inside the main gas storage device 300. If all pulse valves are normal, the pressure inside the main gas storage device 300 is greater than the pressure threshold. If there is an abnormal pulse valve, the pressure inside the main gas storage device 300 (due to the continuous exhaust of the abnormal pulse valve) is not greater than the pressure threshold.

[0035] This control method records the open solenoid valves 400 when the pressure inside the main gas storage device 300 is not greater than the pressure threshold. It then closes the recorded solenoid valves 400 one by one at set time intervals until the pressure inside the main gas storage device 300 recovers to above the pressure threshold within a set time interval after closing a particular solenoid valve 400. Finally, it controls the last closed solenoid valve 400 to remain closed while opening all other recorded solenoid valves 400. This method is not only suitable for troubleshooting situations where only a single group of pulse valves is abnormal, but also, through repetition, for troubleshooting situations where multiple groups of pulse valves are abnormal (i.e., after all the solenoid valves 400 of the abnormal group of pulse valves are closed, the pressure inside the main gas storage device 300 recovers to above the pressure threshold within a set time interval). Furthermore, the maintenance of the abnormal group of pulse valves will not affect the normal pulse blowing of the normal group of pulse valves.

[0036] In some examples, prior to the step of ensuring that the pressure inside the total gas storage device 300 does not exceed a pressure threshold, the control method further includes: opening N electrically controlled valves 400 to ensure that the dust removal system performs dust removal with optimal dust removal performance.

[0037] In some examples, after the step of ensuring that the pressure inside the total gas storage device 300 does not exceed a pressure threshold, the control method further includes: controlling the alarm device to output alarm information to ensure that operators / maintenance personnel are aware of any abnormal pulse valves as soon as possible.

[0038] In some exemplary embodiments, after the step of controlling the last closed solenoid valve 400 to remain closed, the control method further includes: controlling the display device to display identification information for characterizing the solenoid valve 400 that remains closed, so as to ensure that the operator / maintenance personnel know immediately which group of pulse valves the abnormal pulse valve is located in.

[0039] This invention also provides a control method for a dust removal system, such as... Figure 2 As shown, it includes:

[0040] Open N electrically controlled valves at 400°.

[0041] Obtain the pressure P inside the total gas storage device 300, and determine whether the first judgment condition P≤ pressure threshold P1 is met;

[0042] If the first judgment condition is met, the alarm device outputs alarm information, records the electrically controlled valves 400 that are in the open state, and closes the recorded electrically controlled valves 400 one by one at set time intervals. During the process of closing the recorded electrically controlled valves 400 one by one, the pressure P inside the total gas storage device 300 is acquired in real time at each set time interval. When P > P1, the closure of the recorded electrically controlled valves 400 is stopped, and the last electrically controlled valve 400 to be closed is kept closed. The display device displays the identification information of the electrically controlled valves 400 that are kept closed. The remaining recorded electrically controlled valves 400 are opened. Then, the steps of acquiring the pressure P inside the total gas storage device 300 and judging whether the first judgment condition P ≤ pressure threshold P1 is met are executed.

[0043] This invention also provides a gypsum board production line (not shown in the figure), which includes the dust removal system described in any of the above embodiments.

[0044] This gypsum board production line possesses all the advantages of the dust removal system provided in any of the above embodiments, which will not be elaborated further here.

[0045] In summary, the dust removal system proposed in this embodiment of the invention uses a pressure detection device to detect the pressure inside the main air storage device. If all pulse valves are normal, the pressure inside the main air storage device is greater than the pressure threshold. If an abnormal pulse valve is present, the pressure inside the main air storage device (due to the continuous exhaust from the abnormal pulse valve) is not greater than the pressure threshold. When the pressure inside the main air storage device is not greater than the pressure threshold, the control device records the electrically controlled valves that are in the open state and closes the recorded electrically controlled valves one by one at set time intervals until the pressure inside the main air storage device recovers to a level greater than the pressure threshold within the set time interval after closing a certain electrically controlled valve. Then, the last electrically controlled valve to be closed is kept closed, and all other recorded electrically controlled valves are opened. This solution is not only suitable for troubleshooting situations where only a single group of pulse valves is abnormal, but also, by repeating the process, suitable for troubleshooting situations where multiple groups of pulse valves are abnormal. Moreover, during the maintenance of abnormal pulse valves, the normal pulse valves will not be affected in their normal pulse blowing.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "one side", "the other side", "one end", "the other end", "edge", "opposite", "four corners", "perimeter", "the structure of the character 'kou'" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred structure has a specific orientation, is constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0047] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "connection", "direct connection", "indirect connection", "fixed connection", "installation", "assembly" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; the terms "installation", "connection", "fixed connection" may be directly connected, or indirectly connected through an intermediate medium, and may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0048] Although the disclosed embodiments of the present invention are as above, the described content is only the embodiments adopted for the convenience of understanding the present invention, and is not used to limit the present invention. Any person skilled in the art within the scope of the present invention can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed by the present invention. However, the scope of patent protection of the present invention shall still be defined by the appended claims.

Claims

1. A dust removal system, characterized in that, include: The dust collector is equipped with N sets of pulse valves; An air compressor and a main air storage device, wherein the air inlet of the main air storage device is connected to the air compressor; N electrically controlled valves, one end of each of the N electrically controlled valves is connected to one of the N sets of pulse valves, and the other end of each of the N electrically controlled valves is connected to the outlet of the total gas storage device. A pressure detection device is provided in the main gas storage device and is configured to detect the pressure inside the main gas storage device. The control device, the pressure detection device and the N electric control valves are all electrically connected to the control device. The control device is configured to record the electric control valves that are in the open state based on the pressure inside the total gas storage device not being greater than the pressure threshold, and to close the recorded electric control valves one by one at a set time interval until the set condition is met. Then, the last closed electric control valve is controlled to remain closed, and all other recorded electric control valves are controlled to open. The set condition is that the pressure inside the total gas storage device recovers to a pressure threshold within the set time interval after a certain electronically controlled valve is closed.

2. The dust removal system according to claim 1, characterized in that, Also includes: There are N gas storage devices, with the air inlets of the N gas storage devices connected to one end of each of the N electrically controlled valves, and the air outlets of the N gas storage devices connected to each of the N sets of pulse valves.

3. The dust removal system according to claim 1, characterized in that, Also includes: An alarm device, electrically connected to the control device, is configured to output an alarm message when the pressure inside the total gas storage device is lower than a set pressure. and / or The display device, electrically connected to the control device, is configured to display identification information for representing the electrically controlled valve that is maintained in a closed state.

4. The dust removal system according to any one of claims 1 to 3, characterized in that, Each group of pulse valves includes one pulse valve or multiple pulse valves arranged in parallel.

5. The dust removal system according to claim 2, characterized in that, Both the main gas storage device and the sub-gas storage devices are gas storage bags.

6. A control method for a dust removal system as described in any one of claims 1 to 5, characterized in that, include: Based on the fact that the pressure inside the total gas storage device is not greater than the pressure threshold, the electrically controlled valves that are in the open state are recorded, and the recorded electrically controlled valves are closed one by one at a set time interval until the set condition is met. Then, the last electrically controlled valve that is closed is controlled to remain in the closed state, and all the remaining recorded electrically controlled valves are controlled to open. The set condition is that the pressure inside the total gas storage device recovers to a pressure threshold within the set time interval after a certain electronically controlled valve is closed.

7. The control method according to claim 6, characterized in that, Prior to the step of ensuring that the pressure inside the total gas storage device does not exceed a pressure threshold, the control method further includes: Open N electrically controlled valves.

8. The control method according to claim 6, characterized in that, After the step of ensuring that the pressure inside the total gas storage device is not greater than a pressure threshold, the control method further includes: Control the alarm device to output alarm information.

9. The control method according to claim 8, characterized in that, After the step of controlling the last closed electronically controlled valve to remain closed, the control method further includes: The control display device displays identification information for the electrically controlled valve that is maintained in the closed state.

10. A gypsum board production line, characterized in that, Includes the dust removal system as described in any one of claims 1 to 5.

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