A method for starting a moisture removal system and a moisture removal system

Abstract

The application discloses a kind of damp system starting method, damp system includes damp motor, and damp system starting method includes the following steps: first acquisition step: the pressure of damp motor entrance end and the pressure of damp motor outlet end are acquired;Calculation step: based on the pressure of damp motor entrance end and the pressure of damp motor outlet end, the actual pressure difference of damp motor entrance end and damp motor outlet end is calculated;Second acquisition step: the set pressure difference is acquired;Judgment step: whether actual pressure difference is greater than set pressure difference, if yes, then adjust the pressure of damp motor entrance end and / or the pressure of damp motor outlet end, and return to execute first acquisition step;If no, then start damp motor.The technical scheme of the present application can reduce the load when damp motor starts, avoid tripping caused by too high starting current of damp motor, and ensure normal start of damp motor.The present application also provides a kind of damp system.

Description

Technical Field

[0001] This invention relates to the field of cigarette equipment, and in particular to a method for starting a dehumidification system and a dehumidification system. Background Technology

[0002] Dehumidification systems are widely used in industrial production, such as the attached... Figure 1 As shown, the dehumidification system mainly consists of a dehumidification pipe 10, a dehumidification motor 20, and a dust removal system (not shown in the figure). A safety valve 30 is installed on the dehumidification pipe 10 between the dehumidification motor 20 and the dust removal system. During production, the dehumidification system, through the action of the dehumidification motor, discharges the exhaust gas generated by the production equipment to the dust removal system for treatment. The current dehumidification system has the problem that when the equipment restarts, the motor's torque increases during startup, resulting in a high starting current, which can prevent the dehumidification system from starting smoothly and may also damage the motor. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that traditional dehumidification systems suffer from high starting torque and starting current of the dehumidification motor, which prevents the system from starting smoothly and may damage the motor. This invention provides a dehumidification system startup method that ensures smooth startup of the system and avoids damage to the dehumidification motor.

[0004] To address the aforementioned technical problems, embodiments of the present invention disclose a method for starting a desiccant system. The desiccant system includes a desiccant motor, and the method for starting the desiccant system includes the following steps:

[0005] First acquisition step: Acquire the pressure at the inlet end of the dehumidification motor and the pressure at the outlet end of the dehumidification motor;

[0006] Calculation steps: Based on the pressure at the inlet and outlet of the dehumidification motor, calculate the actual pressure difference between the inlet and outlet of the dehumidification motor;

[0007] Second acquisition step: Acquire the set pressure difference;

[0008] Judgment steps: Determine whether the actual pressure difference is greater than the set pressure difference. If yes, adjust the pressure at the inlet end of the dehumidification motor and / or the pressure at the outlet end of the dehumidification motor, and return to execute the first acquisition step; if no, start the dehumidification motor.

[0009] By adopting the above technical solution, before starting the dehumidification system, the pressure at the inlet and outlet of the dehumidification motor is detected. If the pressure difference between the inlet and outlet is greater than the set pressure difference, the pressure at the inlet and / or outlet is adjusted until the pressure difference is less than or equal to the set pressure difference before starting the dehumidification motor. Therefore, by reducing the pressure difference between the inlet and outlet of the dehumidification motor, the load on the motor during startup is reduced, thereby reducing the starting current. This prevents the dehumidification motor from tripping due to excessive starting current caused by a large pressure difference, ensuring normal startup of the dehumidification motor and avoiding damage to the motor.

[0010] As one specific implementation method, starting the dehumidification motor includes:

[0011] Obtain the starting current of the dehumidification motor;

[0012] Determine if the starting current is greater than the set starting current. If yes, update the set pressure difference in the calculation step and return to execute the judgment step; otherwise, start the dehumidification motor.

[0013] As one specific implementation method, obtaining the set pressure difference includes:

[0014] Initial acquisition steps: Start the dehumidification system at least twice, and acquire the measured value of the starting current of the dehumidification motor and the pressure difference between the inlet and outlet of the dehumidification motor for each start-up.

[0015] Based on the measured values ​​of each starting current and each pressure difference obtained in the initial acquisition step, the first relationship between the pressure difference between the inlet end and the outlet end of the dehumidification motor and the starting current of the dehumidification motor is determined.

[0016] Based on the rated current of the dehumidification motor, obtain the threshold of the starting current of the dehumidification motor;

[0017] The set pressure difference is obtained based on the threshold of the starting current and the first relationship.

[0018] As a specific implementation method, the threshold value of the starting current of the dehumidification motor is:

[0019] (β min +β max )*I n / 2

[0020] Among them, I n β is the rated current of the dehumidification motor. min β is the minimum starting current coefficient of the dehumidification motor. maxβ is the maximum starting current coefficient of the dehumidification motor, and β min <β max .

[0021] As one specific implementation, updating the set pressure difference in the calculation step includes updating the set pressure difference in the calculation step based on the set pressure difference at the current moment and the following formula:

[0022] FN2=FN1*(1-α)

[0023] Where FN1 is the current set pressure difference, FN2 is the updated set pressure difference, α is the tuning coefficient, and 0 < α < 1.

[0024] As a specific implementation method, the setting factor is determined based on the starting current of the dehumidification motor, the rated current of the dehumidification motor, and the following formula:

[0025]

[0026] Where α is the tuning coefficient, I 启动 I is the starting current of the dehumidification motor. n This is the rated current of the dehumidification motor.

[0027] As one specific implementation method, the first acquisition step includes:

[0028] A first pressure sensor is installed at the inlet end of the dehumidification motor to obtain the pressure at the inlet end of the dehumidification motor detected by the first pressure sensor;

[0029] A second pressure sensor is installed at the outlet of the dehumidification motor to obtain the pressure at the outlet of the dehumidification motor detected by the second pressure sensor.

[0030] As one specific implementation method, adjusting the pressure value at the inlet end of the dehumidification motor and / or the pressure at the outlet end of the dehumidification motor includes:

[0031] A constant pressure pipeline is installed to connect the inlet end and the outlet end of the dehumidification motor. A constant pressure valve is installed on the constant pressure pipeline.

[0032] Open the pressure balancing valve to connect the inlet and outlet ends of the dehumidification motor to balance the pressure at the inlet and outlet ends of the dehumidification motor.

[0033] As one specific implementation method, it also includes discharging condensate from the outlet of the dehumidification motor.

[0034] As one specific implementation method, adjusting the pressure at the inlet of the dehumidification motor and / or the pressure at the outlet of the dehumidification motor is carried out simultaneously with discharging the condensate at the outlet of the dehumidification motor.

[0035] As one specific implementation method, the condensate at the outlet of the dehumidification motor is discharged, including:

[0036] A condensate pipe is connected to the constant pressure pipeline. A drain valve is installed on the condensate pipe. When the constant pressure valve is opened, the drain valve is also opened, allowing the condensate at the outlet of the dehumidification motor to be discharged through the constant pressure pipeline and the condensate pipe.

[0037] Another embodiment of the present invention discloses a dehumidification system, including a dehumidification motor, the dehumidification system comprising:

[0038] The first pressure sensor is used to detect the pressure at the inlet end of the dehumidification motor.

[0039] The second pressure sensor is used to detect the pressure at the outlet of the dehumidification motor.

[0040] A processor, connected to a first pressure sensor and a second pressure sensor; the processor is used to acquire the pressure at the inlet end of the desiccant motor detected by the first pressure sensor and the pressure at the outlet end of the desiccant motor detected by the second pressure sensor, and to calculate the actual pressure difference between the inlet end and the outlet end of the desiccant motor based on the pressure at the inlet end and the outlet end of the desiccant motor; and,

[0041] The system acquires the set pressure difference and determines whether the actual pressure difference is greater than the set pressure difference. If not, it sends a start signal to the dehumidification motor; if so, it sends an adjustment signal.

[0042] The adjustment module is used to receive adjustment signals to adjust the pressure at the inlet end of the dehumidification motor and / or the pressure at the outlet end of the dehumidification motor.

[0043] As a specific implementation, the processor is also configured to acquire the startup current I when determining whether the startup current is greater than a set startup current. 启动 And based on the starting current I of the exhaust motor 启动 and the rated current I of the dehumidification motor n To calculate the setting factor α, and update the set pressure difference in the calculation step.

[0044] As one specific implementation, the adjustment module includes a constant pressure pipeline, the two ends of which are respectively connected to the inlet end of the dehumidification motor and the outlet end of the dehumidification motor;

[0045] A pressure-regulating valve is installed on a pressure-regulating pipeline to control the opening and closing of the pipeline. When the pressure-regulating valve is open, the inlet and outlet ends of the dehumidification motor are connected.

[0046] As one specific implementation, it also includes a condensate pipe, on which a check valve and a drain valve are provided. The drain valve is used to control the opening and closing of the condensate pipe.

[0047] As one specific implementation, the condensate pipe is connected to the lower part of the pressure-regulating pipeline in the vertical direction.

[0048] As one specific implementation method, it also includes:

[0049] The equipment end connection pipe is used to connect the inlet end of the dehumidification motor to the production equipment;

[0050] Transition pipe, connected to the outlet end of the dehumidification motor;

[0051] The first branch pipe is connected to the equipment end connecting pipe and is inclined relative to the equipment end connecting pipe. The first pressure sensor is installed on the first branch pipe.

[0052] The second branch pipe is connected to the transition pipe and is inclined relative to the transition pipe. The second pressure sensor is installed on the second branch pipe.

[0053] In one specific implementation, both the first pressure sensor and the second pressure sensor are arranged facing upwards in the vertical direction. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the existing desiccation system involved in the background art;

[0055] Figure 2 This is a flowchart illustrating a method for starting up a dehumidification system according to an embodiment of the present invention;

[0056] Figure 3 This is a schematic diagram of the structure of a moisture removal system according to another embodiment of the present invention;

[0057] In the diagram, 10-drainage pipe, 11-equipment end connection pipe, 12-dust removal end connection pipe, 13-connection pipe, 14-first branch pipe, 15-second branch pipe, 20-drainage motor, 30-safety valve, 40-pressure balancing pipe, 41-pressure balancing valve, 50-condensate pipe, 51-check valve, 52-drain valve, 61-first pressure sensor, 62-second pressure sensor. Detailed Implementation

[0058] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0059] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0060] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0061] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0062] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0063] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0064] Reference Figure 1As described in the background section, the dehumidification system includes a dehumidification pipe 10 and a dehumidification motor 20. A safety valve 30 is installed on the dehumidification pipe 10, and a transition pipe 13 connects the safety valve 30 to the dehumidification motor 20. In practice, the inventors of this application have discovered that since the dehumidification system discharges a mixture of high-temperature, high-humidity water, steam, and gas, when the production equipment and the dehumidification system stop operating, the dehumidification motor stops, and the safety valve 30 connected to the dust removal system also closes, sealing the transition pipe 13 between the dehumidification motor 20 and the safety valve 30. Therefore, when the system stops, the ambient temperature and humidity within the transition pipe 13 are very high. After a certain period, the temperature within the transition pipe 13 decreases. Due to the principle of thermal expansion and contraction, the gas volume within the transition pipe 13 shrinks, and the gas pressure also decreases, resulting in a large pressure difference between the inlet and outlet ends of the dehumidification motor 20. This leads to a larger torque during startup of the dehumidification motor 20, causing an excessively high starting current and tripping the circuit breaker, preventing the dehumidification system from starting smoothly. In addition, after the temperature in the transition pipe 13 drops, some condensate will be generated, which will easily accumulate in the dehumidification pipe at the outlet end of the dehumidification motor 20, and will also increase the starting load of the dehumidification motor 20; and after the dehumidification is started, the condensate generated in the transition pipe 13 will flow back to the production equipment along the dehumidification pipe 10, causing water accumulation in the production channel.

[0065] Reference Figure 2 This invention discloses a method for starting a dehumidification system, the dehumidification system including a dehumidification motor, comprising the following steps:

[0066] First step: Obtain the pressure at the inlet end of the dehumidification motor and the pressure at the outlet end of the dehumidification motor.

[0067] Calculation steps: Based on the pressure at the inlet and outlet of the dehumidification motor, calculate the actual pressure difference between the inlet and outlet of the dehumidification motor.

[0068] The second step is to obtain the set pressure difference. The set pressure difference is the pressure difference between the inlet and outlet ends of the dehumidification motor when it is running normally. For example, the set pressure difference is represented by FN.

[0069] Judgment steps: Determine whether the actual pressure difference is greater than the set pressure difference. If yes, adjust the pressure at the inlet end of the dehumidification motor and / or the pressure at the outlet end of the dehumidification motor, and return to execute the first acquisition step; if no, start the dehumidification motor.

[0070] In other words, before starting the dehumidification system, the pressure FB1 at the inlet and FB2 at the outlet of the dehumidification motor are detected. If the pressure difference |FB1-FB2| between the inlet and outlet of the dehumidification motor is greater than the set pressure difference FN, the pressure at the inlet and / or outlet of the dehumidification motor is adjusted until the pressure difference is less than or equal to the set pressure difference (|FB1-FB2|≤FN), at which point the dehumidification motor is started. Therefore, this embodiment reduces the load on the motor during startup by lowering the pressure difference between the inlet and outlet of the dehumidification motor, thereby reducing the starting current and preventing tripping due to excessive starting current caused by a large pressure difference between the inlet and outlet of the dehumidification motor, thus ensuring normal startup of the dehumidification motor.

[0071] Furthermore, starting the dehumidification motor includes: obtaining the starting current of the dehumidification motor; determining whether the starting current is greater than the set starting current; if so, updating the set pressure difference in the calculation step and returning to the judgment step; if not, starting the dehumidification motor.

[0072] Furthermore, the set pressure difference in the calculation step is updated, including updating the set pressure difference in the calculation step based on the set pressure difference at the current moment and the following formula:

[0073] FN2=FN1*(1-α)

[0074] Where FN1 is the current set pressure difference, FN2 is the updated set pressure difference, α is the tuning coefficient, and 0 < α < 1.

[0075] Furthermore, in the second acquisition step described above, acquiring the set pressure difference includes:

[0076] Initial acquisition steps: Start the dehumidification system at least twice, and acquire the measured value of the starting current of the dehumidification motor and the pressure difference between the inlet and outlet of the dehumidification motor for each start-up.

[0077] Based on the measured values ​​of each starting current and each pressure difference obtained in the initial acquisition step, the first relationship between the pressure difference between the inlet and outlet ends of the dehumidification motor and the starting current of the dehumidification motor is determined.

[0078] Based on the rated current of the dehumidification motor, the threshold value of the starting current of the dehumidification motor is obtained.

[0079] The set pressure difference is obtained based on the threshold of the starting current and the first relationship.

[0080] Specifically, the pressure difference between the inlet and outlet of the dehumidification motor is linearly positively correlated with the starting current of the dehumidification motor, that is, it satisfies the following relationship:

[0081] I 启动 =K*Fn+M

[0082] Among them, I 启动 Fn is the motor starting current, Fn is the pressure difference between the inlet and outlet of the dehumidification motor, and K and M are constants.

[0083] Furthermore, the constants K and M can be determined by starting the dehumidification system twice, obtaining the corresponding starting current of the dehumidification motor and the pressure difference between the inlet and outlet of the dehumidification motor for each start-up. The starting current of the dehumidification motor and the pressure difference between the inlet and outlet of the dehumidification motor for each start-up, along with formula I... 启动 =K*Fn+M can be used to determine the values ​​of K and M. For example, taking the determination of K and M by starting the dehumidification system twice, when starting the dehumidification system for the first time, the starting current of the dehumidification motor is obtained as I. 启动1 The pressure difference between the inlet and outlet of the dehumidification motor is Fn1; when the dehumidification system is started for the second time, the starting current of the dehumidification motor is obtained as I. 启动2 The pressure difference between the inlet and outlet of the dehumidification motor is Fn2; then the constants K and M can be obtained through the following calculations:

[0084] I 启动1 =K*Fn1+M

[0085] I 启动2 =K*Fn2+M

[0086] From the above, by obtaining the constants K and M, the pressure difference Fn between the inlet and outlet ends of the dehumidification motor and the motor starting current I can be determined. 启动 The relationship between them.

[0087] Furthermore, when determining the initial value of the set pressure, the threshold value of the starting current of the dehumidification motor is determined as follows:

[0088] In industrial control, the starting current of different motors must not exceed a specified range. Therefore, the starting current of the dehumidification motor needs to meet the following conditions:

[0089] I n *β min ≤I 启动 ≤I n *β max

[0090] Where, β min β is the minimum starting current coefficient of the dehumidification motor.max Let β be the maximum starting current coefficient of the dehumidification motor, and β min <β max I n This is the rated current of the dehumidification motor. I n *β min with I n *β max The range of values ​​between these two values ​​represents the normal starting current range for the dehumidification motor. Therefore, the starting current is set to I. n *β max , or I n *β min to I n *β max Any value between these two values.

[0091] Furthermore, during the startup process of the dehumidification system, the starting current of the dehumidification motor should ideally meet the following conditions:

[0092] I 启动 ≤(β min +β max )*I n / 2

[0093] That is, the threshold value of the starting current of the dehumidification motor is set as (β). min +β max )*I n / 2.

[0094] at this time:

[0095] I 启动 =K*Fn+M≤(β) min +β max )*I n / 2

[0096] Therefore, when the dehumidification motor starts, the pressure difference between the inlet and outlet ends of the dehumidification motor should meet the following conditions:

[0097] Fn≤((β min +β max )*I n / 2-M) / K

[0098] Therefore, the initial value of the set pressure difference FN is determined to be ((β) min +β max )*I n / 2-M) / K. That is to say, assuming the starting current I of the exhaust motor... 启动 When the current exceeds the median value of the set starting current, the dehumidification motor will trip due to overcurrent, thus determining the initial value of the set pressure value FN in the calculation step.

[0099] In the actual operation of the dehumidification system, the starting current requirements of the dehumidification motor vary depending on the occasion and operating conditions. Therefore, it is necessary to adjust the set pressure value according to the actual situation to adapt to changes in the occasion / operating conditions. After adjusting the actual pressure difference between the inlet and outlet of the dehumidification motor to be less than the initial value of the set pressure, the dehumidification motor is started. If the starting current of the dehumidification motor is greater than the set starting current, causing a trip and preventing the dehumidification motor from starting normally, the set pressure difference FN in the calculation step is updated to adjust it to enable the dehumidification motor to start normally.

[0100] As mentioned above, the set pressure difference FN is updated based on the current set pressure difference and the following formula:

[0101] FN2=FN1*(1-α)

[0102] Where FN1 is the current set pressure difference, FN2 is the updated set pressure difference, α is the tuning coefficient, and 0 < α < 1.

[0103] Furthermore, the setting factor α is based on the starting current I of the exhaust motor. 启动 and the rated current I of the dehumidification motor n The difference is determined, I 启动 and I n The larger the difference, the larger the setting coefficient α, i.e., the larger the setting range; conversely, the smaller the difference, the smaller the setting coefficient α. Specifically, the setting coefficient α is calculated using the following formula:

[0104]

[0105] Based on the above, the set pressure difference FN can be adjusted according to whether the actual pressure difference between the inlet and outlet of the dehumidification motor is sufficient for normal start-up. This adjustment is made using the setting coefficient α and the formula FN2 = FN1 * (1-α). The updated set pressure difference is obtained based on the current set pressure difference and the setting coefficient at each moment, until the optimal set pressure difference FN for starting the dehumidification motor is obtained. When the actual pressure difference between the inlet and outlet of the dehumidification motor is less than the updated set pressure difference, and the starting current of the dehumidification motor meets the starting current requirements of the current mining conditions, the dehumidification motor can start normally.

[0106] Further, the first acquisition step includes: setting a first pressure sensor at the inlet end of the dehumidification motor to acquire the pressure at the inlet end of the dehumidification motor detected by the first pressure sensor; setting a second pressure sensor at the outlet end of the dehumidification motor to acquire the pressure at the outlet end of the dehumidification motor detected by the second pressure sensor.

[0107] Further, adjusting the pressure at the inlet of the dehumidification motor and / or the pressure at the outlet of the dehumidification motor includes: setting up a pressure-balancing pipeline to connect the inlet and outlet of the dehumidification motor, with a pressure-balancing valve installed on the pressure-balancing pipeline; opening the pressure-balancing valve to connect the inlet and outlet of the dehumidification motor to balance the pressure at the inlet and outlet of the dehumidification motor.

[0108] Furthermore, it also includes the discharge of condensate from the outlet of the dehumidification motor.

[0109] Furthermore, adjusting the pressure at the inlet of the desiccant motor and / or the pressure at the outlet of the desiccant motor is performed simultaneously with discharging the condensate from the outlet of the desiccant motor. For example, discharging the condensate from the outlet of the desiccant motor includes: connecting a condensate pipe to the pressure-regulating pipeline, with a drain valve installed on the condensate pipe; opening the drain valve simultaneously with opening the pressure-regulating valve, allowing the condensate from the outlet of the desiccant motor to be discharged through the pressure-regulating pipeline and the condensate pipe. Further, the condensate pipe is connected to the lower vertical section of the pressure-regulating pipeline to facilitate the discharge of condensate.

[0110] Draining condensate can prevent an increase in the starting load of the dehumidification motor. It can also prevent condensate from flowing back into the production equipment and causing water accumulation in the production channels.

[0111] Reference Figure 3 Another embodiment of the present invention discloses a dehumidification system, which includes a dehumidification motor 20, a first pressure sensor 61, a second pressure sensor 62, a processor, and an adjustment module.

[0112] The first pressure sensor 61 is used to detect the pressure at the inlet of the dehumidification motor. The second pressure sensor 62 is used to detect the pressure at the outlet of the dehumidification motor.

[0113] The processor is connected to the first pressure sensor 61 and the second pressure sensor 62. The processor acquires the pressure at the inlet of the desiccant motor 20 detected by the first pressure sensor 61 and the pressure at the outlet of the desiccant motor 20 detected by the second pressure sensor 62. Based on the pressure at the inlet and outlet of the desiccant motor 20, the processor calculates the actual pressure difference between the inlet and outlet of the desiccant motor 20. The processor also acquires a set pressure difference and determines whether the actual pressure difference is greater than the set pressure difference. If not, it sends a start signal to the desiccant motor 20; if so, it sends an adjustment signal.

[0114] The processor is also used to obtain the startup current I. 启动 And based on the starting current I of the exhaust motor 启动 and the rated current I of the dehumidification motor n The setting factor α is calculated to update the set pressure difference FN as the operating conditions change.

[0115] An adjustment module is used to receive adjustment signals to adjust the pressure at the inlet end of the dehumidification motor 20 and / or the pressure at the outlet end of the dehumidification motor 20.

[0116] Furthermore, the dehumidification system includes a dehumidification pipe 10 and a safety valve 30. Specifically, the dehumidification pipe 10 includes an equipment-end connecting pipe 11 and a dust removal-end connecting pipe 12. One end of the equipment-end connecting pipe 11 is connected to the inlet end of the dehumidification motor 20, and the other end is connected to the production equipment. One end of the dust removal-end connecting pipe 12 is connected to the outlet end of the dehumidification motor 20, and the other end is connected to the dust removal system. The safety valve 30 is installed on the dust removal-end connecting pipe 12; that is, the transition pipe 13 is the dust removal-end connecting pipe 12 between the safety valve 30 and the outlet end of the dehumidification motor 20.

[0117] Further, a first pressure sensor 61 is installed on the equipment-end connecting pipe 11 to detect the pressure at the inlet of the dehumidification motor 20. A second pressure sensor 62 is installed on the transition pipe 13 to detect the pressure at the outlet of the dehumidification motor 20. The first pressure sensor 61 is connected to the equipment-end connecting pipe 11 via a first branch pipe 14, and the second pressure sensor 62 is connected to the transition pipe 13 via a second branch pipe 15. Specifically, the first branch pipe 14 is connected to the equipment-end connecting pipe 11 and is inclined relative to the equipment-end connecting pipe 11, and the first pressure sensor 61 is installed on the first branch pipe 14. The second branch pipe 15 is connected to the transition pipe 13 and is inclined relative to the transition pipe 13, and the second pressure sensor 62 is installed on the second branch pipe 15. The first branch pipe 14 is connected to the upper end of the equipment-end connecting pipe 11 in the vertical direction. The transition pipe 13 extends in the vertical direction, and the angle between the second branch pipe 15 and the transition pipe 13 is an acute angle. Figure 2 As shown by angle α, the second branch 15 forms a Y-shaped branch relative to the transition pipe 13.

[0118] In other words, the first pressure sensor 61 and the second pressure sensor 62 are respectively connected to the upper ends of the first branch pipe 14 and the second branch pipe 15 in the vertical direction. That is, the first pressure sensor 61 and the second pressure sensor 62 are both facing upward or slightly upward. This arrangement can prevent water from accumulating at the detection points of the first pressure sensor 61 and the second pressure sensor 62, thus avoiding affecting the detection accuracy and damaging the pressure sensors.

[0119] The adjustment module includes a pressure-balancing pipeline 40 and a pressure-balancing valve 41. One end of the pressure-balancing pipeline 40 is connected to the transition pipeline 13, and the other end is connected to the equipment-end connecting pipeline 11. In other words, the pressure-balancing pipeline 40 connects the inlet and outlet ends of the dehumidification motor 20. The pressure-balancing valve 41 is installed on the pressure-balancing pipeline 40 and is used to disconnect or connect the pipeline. When the pressure-balancing valve 41 is open, the pressure-balancing pipeline 40 is in a connected state, and the transition pipeline 13 and the equipment-end connecting pipeline 11 are connected through the pressure-balancing pipeline 40. This means that the inlet and outlet ends of the dehumidification motor 20 are connected, causing the pressure difference between the inlet and outlet ends of the dehumidification motor 20 to gradually decrease, thereby adjusting the pressure at the inlet and / or outlet ends of the dehumidification motor 20.

[0120] Specifically, when it is necessary to adjust the pressure at the inlet and / or outlet of the dehumidification motor, the pressure balancing valve 41 opens. At this time, the pressure in the transition pipe 13 connected to the outlet of the dehumidification motor 20 will increase over a certain period until it is consistent with the pressure in the equipment connection pipe 11 connected to the inlet of the dehumidification motor 20. During the adjustment process, when the pressure difference between the inlet and outlet of the dehumidification motor 20 is less than the set pressure difference, the dehumidification motor 20 can be started.

[0121] Reference Figure 3 The pressure-regulating pipeline 40 is connected to the lower vertical end of the equipment-end connecting pipeline 11. A condensate pipe 50 is connected to the lower vertical end of the pressure-regulating pipeline 40. The condensate pipe 50 is used to discharge condensate generated in the transition pipeline 13 at the outlet end of the dehumidification motor 20, thereby reducing the starting load of the dehumidification motor 20 and preventing condensate from flowing back into the production equipment from the equipment-end connecting pipeline 11, thus preventing water accumulation in the production channel. For example, the condensate pipe 50 extends vertically or at an angle to the vertical direction to ensure smooth drainage of condensate.

[0122] Furthermore, the condensate pipe is also equipped with a check valve 51 and a drain valve 52. The drain valve 52 opens simultaneously with the pressure regulating valve 41, connecting the pressure regulating pipeline 40 to the outside environment, allowing condensate from the outlet of the dehumidification motor to drain through the pressure regulating pipeline 40 and the condensate pipe 50. The check valve 51 prevents gas or liquid in the condensate pipe 50 from flowing back into the pressure regulating pipeline 40. The drain valve 52 only opens when the pressure regulating valve 41 is open, or manually when the machine is stopped, to prevent moisture from overflowing during production.

[0123] Furthermore, the processor is also electrically connected to components such as the dehumidification motor 20, the pressure regulating valve 41, and the drain valve 52.

[0124] The technical solution of this application embodiment can detect the pressure at the inlet and outlet of the dehumidification motor before equipment startup, and balance the pressure at the inlet and outlet of the dehumidification motor through a pressure-balancing pipeline, reducing the pressure values ​​at the inlet and outlet of the dehumidification motor to a range where the dehumidification motor can start normally. This reduces the starting torque and starting current of the dehumidification motor, solving the problem of the dehumidification motor failing to start smoothly. It completely avoids motor overcurrent tripping caused by excessive load during startup of the dehumidification system, ensuring smooth startup of the dehumidification motor and preventing damage to the dehumidification motor. Simultaneously, condensate accumulated at the outlet of the dehumidification motor is discharged through a condensate pipe, preventing increased starting load on the dehumidification motor due to condensate accumulation; it also prevents condensate from flowing back into the production equipment and causing water accumulation in the production channel.

[0125] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A method for starting a dehumidification system, the dehumidification system comprising a dehumidification motor, characterized in that, The method for starting the dehumidification system includes the following steps: First acquisition step: Acquire the pressure at the inlet end of the dehumidification motor and the pressure at the outlet end of the dehumidification motor; Calculation steps: Based on the pressure at the inlet end of the desiccant motor and the pressure at the outlet end of the desiccant motor, calculate the actual pressure difference between the inlet end of the desiccant motor and the outlet end of the desiccant motor; Second acquisition step: Acquire the set pressure difference; The step of obtaining the set pressure difference includes an initial acquisition step: starting the dehumidification system at least twice, and obtaining the measured value of the starting current of the dehumidification motor and the pressure difference between the inlet and outlet of the dehumidification motor at each start-up; and, based on the measured values ​​of the starting current and the pressure difference obtained in the initial acquisition step, determining a first relationship between the pressure difference between the inlet and outlet of the dehumidification motor and the starting current of the dehumidification motor; obtaining a threshold value of the starting current of the dehumidification motor based on the rated current of the dehumidification motor; and obtaining the set pressure difference based on the threshold value of the starting current and the first relationship. Judgment step: Determine whether the actual pressure difference is greater than the set pressure difference. If yes, adjust the pressure at the inlet end of the desiccant motor and / or the pressure at the outlet end of the desiccant motor to discharge the condensate at the outlet end of the desiccant motor, and return to execute the first acquisition step; if no, start the desiccant motor. The adjustment of the pressure at the inlet and / or outlet of the desiccant motor includes: setting up a pressure-balancing pipeline to connect the inlet and outlet of the desiccant motor, wherein a pressure-balancing valve is provided on the pressure-balancing pipeline; opening the pressure-balancing valve to connect the inlet and outlet of the desiccant motor to balance the pressure at the inlet and outlet of the desiccant motor. The process of starting the dehumidification motor includes: acquiring the starting current of the dehumidification motor; determining whether the starting current is greater than a set starting current; if so, updating the set pressure difference in the second acquisition step and returning to the determination step; if not, starting the dehumidification motor; wherein updating the set pressure difference in the second acquisition step includes updating the set pressure difference in the second acquisition step based on the set pressure difference at the current moment and the following formula: in, Set the pressure difference for the current moment. The updated set pressure difference, α is the tuning coefficient, and .

2. The method for starting up a dehumidification system as described in claim 1, characterized in that, The threshold value of the starting current of the dehumidification motor is: in, The rated current of the dehumidification motor is... This is the minimum starting current coefficient of the dehumidification motor. Let be the maximum starting current coefficient of the dehumidification motor, and .

3. The method for starting up a dehumidification system as described in claim 1, characterized in that, The setting factor is determined based on the starting current of the desiccant motor, the rated current of the desiccant motor, and the following formula: Where α is the tuning coefficient, I 启动 I is the starting current of the dehumidification motor. n The rated current of the dehumidification motor is given.

4. The method for starting up a dehumidification system as described in claim 1, characterized in that, The first acquisition step includes: A first pressure sensor is installed at the inlet end of the dehumidification motor to obtain the pressure at the inlet end of the dehumidification motor detected by the first pressure sensor; A second pressure sensor is installed at the outlet end of the dehumidification motor to obtain the pressure at the outlet end of the dehumidification motor detected by the second pressure sensor.

5. The method for starting up a dehumidification system as described in claim 1, characterized in that, Adjusting the pressure at the inlet of the desiccant motor and / or the pressure at the outlet of the desiccant motor is performed simultaneously with discharging the condensate at the outlet of the desiccant motor.

6. The method for starting up a dehumidification system as described in claim 5, characterized in that, The condensate at the outlet of the dehumidification motor is discharged, including: A condensate pipe is connected to the constant pressure pipeline, and a drain valve is installed on the condensate pipe. When the constant pressure valve is opened, the drain valve is also opened, so that the condensate at the outlet of the dehumidification motor is discharged through the constant pressure pipeline and the condensate pipe.

7. A dehumidification system, comprising a dehumidification motor, characterized in that, The dehumidification system includes: The first pressure sensor is used to detect the pressure at the inlet end of the dehumidification motor; The second pressure sensor is used to detect the pressure at the outlet end of the dehumidification motor; A processor, connected to the first pressure sensor and the second pressure sensor; the processor is configured to acquire the pressure at the inlet end of the desiccant motor detected by the first pressure sensor and the pressure at the outlet end of the desiccant motor detected by the second pressure sensor, and to calculate the actual pressure difference between the inlet end and the outlet end of the desiccant motor based on the pressure at the inlet end and the pressure at the outlet end of the desiccant motor; and, The system acquires a set pressure difference and determines whether the actual pressure difference is greater than the set pressure difference. If not, it sends a start signal to the dehumidification motor to start the dehumidification motor; if so, it sends an adjustment signal. The process of obtaining the set pressure difference includes an initial acquisition step: starting the dehumidification system at least twice, and acquiring the measured value of the starting current of the dehumidification motor and the pressure difference between the inlet and outlet of the dehumidification motor at each start-up; and, based on the measured values ​​of the starting current and the pressure difference values ​​obtained in the initial acquisition step, determining a first relationship between the pressure difference between the inlet and outlet of the dehumidification motor and the starting current of the dehumidification motor; acquiring a threshold value of the starting current of the dehumidification motor based on the rated current of the dehumidification motor; and acquiring the set pressure difference based on the threshold value of the starting current and the first relationship. The process of starting the dehumidification motor includes: acquiring the starting current of the dehumidification motor; determining whether the starting current is greater than a set starting current; if so, updating the set pressure difference and returning to determine whether the actual pressure difference is greater than the updated set pressure difference; if not, starting the dehumidification motor. Updating the set pressure difference includes updating the set pressure difference based on the current set pressure difference and the following formula: Where FN1 is the current set pressure difference, FN2 is the updated set pressure difference, α is the tuning coefficient, and 0 < α < 1; An adjustment module is used to receive the adjustment signal to adjust the pressure at the inlet end of the dehumidification motor and / or the pressure at the outlet end of the dehumidification motor, and to discharge the condensate at the outlet end of the dehumidification motor. The adjustment of the pressure at the inlet and / or outlet of the desiccant motor includes: setting up a pressure-balancing pipeline to connect the inlet and outlet of the desiccant motor, wherein a pressure-balancing valve is provided on the pressure-balancing pipeline; opening the pressure-balancing valve to connect the inlet and outlet of the desiccant motor to balance the pressure at the inlet and outlet of the desiccant motor.

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