Inclination angle adjusting device and ash conveying valve inclination angle adjusting method and device

Abstract

The embodiment of the invention provides an inclination angle adjusting device and an ash conveying valve inclination angle adjusting method and device. The inclination angle adjusting device comprises a driving part and a supporting part. The supporting part comprises a base and a motor bracket; the driving part comprises at least two rockers, a connecting rod, a fixed rod, at least two hinges, a crank, a torque coupling and a motor; wherein the motor support and the hinge are arranged on the base, the motor is arranged on the motor support, one end of each rocker is connected with the hinge, and the ash conveying valve is fixed between the at least two rockers through the fixing rod; one of the at least two rockers is connected with the crank 205 through the connecting rod, the crank is connected with the motor through the torque coupler, and the rockers, the connecting rod and the crank are connected to form a crank and rocker mechanism; wherein the motor responds to a control instruction to drive the crank rocker mechanism to control the ash conveying valve to move to a target inclination angle.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the technical field of power plant ash conveying, in particular to a tilt angle adjusting device, an ash conveying valve tilt angle adjusting method and device. BACKGROUND

[0002] In the ash conveying system of a thermal power plant, the pilot ash conveying valve as a key anti-blocking device faces significant limitations in the design mode of fixed tilt angle under complex working conditions. In the prior art, the ash conveying valve is usually installed on the side wall of the pipeline at a fixed tilt angle, and its function relies on the one-way scouring of high-pressure gas flow, and it is difficult to adaptively adjust to the ash deposition dynamics, the coal ash physical property parameters (such as density and adhesion coefficient) and the changes of the gas-solid two-phase flow field in the pipeline. Research shows that the gas flow disturbance range under the fixed tilt angle has a strong nonlinear relationship with the ash deposition layer dredging efficiency: when the ash powder particle size distribution or the conveying speed deviates from the design working condition, the fixed angle is easy to cause uneven energy dissipation of the local flow field, forming secondary deposition or accelerating the pipe wall wear. SUMMARY

[0003] Therefore, the embodiment of the present application provides a tilt angle adjusting device and an ash conveying valve tilt angle adjusting method. One or more embodiments of the present application also relate to an ash conveying valve tilt angle adjusting device, a computing device, a computer readable storage medium and a computer program to solve the technical defects in the prior art.

[0004] In a first aspect, the embodiment of the present application provides a tilt angle adjusting device, comprising: a driving part and a supporting part; the supporting part comprises a base and a motor support; the driving part comprises at least two rocker arms, a connecting rod, a fixed rod, at least two hinges, a crank, a torque coupling and a motor; wherein the motor support and the hinges are arranged on the base, the motor is arranged on the motor support, one end of the rocker arm is connected with the hinge, and the ash conveying valve is fixed between the at least two rocker arms through the fixed rod; one of the at least two rocker arms is connected with the crank 205 through the connecting rod, the crank and the motor are connected through the torque coupling, and the rocker arm, the connecting rod and the crank are connected to form a crank and rocker mechanism; wherein the motor drives the crank and rocker mechanism to control the movement of the ash conveying valve to a target tilt angle in response to a control instruction.

[0005] In a second aspect, the embodiment of the present application provides an ash conveying valve tilt angle adjusting method, which is applied to the ash conveying valve tilt angle adjusting method provided in the first aspect, and comprises: acquiring a current pressure value of a target monitoring area in an ash conveying pipeline; determining a target ash blowing mode based on the comparison result of the current pressure value and a pressure gradient threshold value, wherein the ash blowing mode comprises a fixed angle ash blowing mode and a swing ash blowing mode; and adjusting the tilt angle of the ash conveying valve based on the target ash blowing mode.

[0006] In a possible implementation, the method further includes: obtaining the pressure gradient threshold value based on a pressure reference threshold value, a soot density, a reference density, a soot adhesion coefficient, a weight coefficient of adhesion effect, and an influence weight of the soot density and the adhesion coefficient.

[0007] In a possible implementation, obtaining the pressure gradient threshold value based on the pressure reference threshold value, the soot density, the reference density, the soot adhesion coefficient, the weight coefficient of adhesion effect, and the influence weight of the soot density and the adhesion coefficient includes calculating by using the following formula:

[0008]

[0009] k ρ denotes the pressure gradient threshold value, P base denotes the reference threshold value, k ρ denotes the influence weight of the soot density and the adhesion coefficient, ρ0 denotes the reference density, ρ(t) denotes the soot density, k τ denotes the weight coefficient of the adhesion effect, τ dust denotes the soot adhesion coefficient.

[0010] In a possible implementation, determining the target soot blowing mode based on the comparison result of the current pressure value and the pressure gradient threshold value includes:

[0011] determining whether the current pressure value is greater than the pressure gradient threshold value and lasts for no less than a time threshold value; if yes, determining that the target soot blowing mode is the swing soot blowing mode, and if no, determining that the target soot blowing mode is the fixed-angle soot blowing mode.

[0012] In a possible implementation, adjusting the inclination angle of the soot conveying valve based on the target soot blowing mode includes: when the target soot blowing mode is the fixed-angle soot blowing mode, adjusting the inclination angle of the soot conveying valve to a target fixed inclination angle; the target fixed inclination angle includes a first fixed inclination angle and / or a second fixed inclination angle, the first fixed inclination angle is an inclination angle with the shortest soot blowing time compared with other inclination angles, and the second fixed inclination angle is an inclination angle with the lowest power consumption compared with other inclination angles.

[0013] In a possible implementation, adjusting the inclination angle of the soot conveying valve based on the target soot blowing mode includes: when the target soot blowing mode is the swing soot blowing mode, controlling the soot conveying valve to periodically swing around a target inclination angle with a preset amplitude and a preset frequency.

[0014] In a third aspect, an embodiment of the present application provides a soot conveying valve inclination angle adjusting device, including:

[0015] an information acquisition module configured to acquire a current pressure value of a target monitoring area in a soot conveying pipeline.

[0016] A mode confirmation module is configured to determine a target soot blowing mode based on a comparison result of the current pressure value and a pressure gradient threshold value, wherein the soot blowing mode includes a fixed angle soot blowing mode and a swing soot blowing mode.

[0017] An inclination angle adjustment module is configured to adjust an inclination angle of the soot blowing valve based on the target soot blowing mode.

[0018] In a fourth aspect, an embodiment of the present application provides a computing device, comprising:

[0019] a memory and a processor;

[0020] The memory is configured to store computer executable instructions, and the processor is configured to execute the computer executable instructions, so as to implement the steps of the soot blowing valve inclination angle adjustment method.

[0021] In a fifth aspect, an embodiment of the present application provides a computer readable storage medium, which stores computer executable instructions, and the instructions, when executed by a processor, implement the steps of the soot blowing valve inclination angle adjustment method.

[0022] In a sixth aspect, an embodiment of the present application provides a computer program, and when the computer program is executed in a computer, the computer program causes the computer to execute the steps of the soot blowing valve inclination angle adjustment method.

[0023] The technical solution provided by the embodiments of the present application realizes accurate control of the inclination angle adjustment of the soot blowing valve by adopting a crank rocker mechanism as a core structure of the inclination angle adjustment, wherein if the fixed angle soot blowing mode is adopted, an optimal inclination angle is calibrated based on a computational particle fluid dynamics simulation, and a PID controller is combined to correct an angle deviation in real time, so that a gray flow velocity field distribution tends to an ideal state, maximum soot blowing efficiency or reduced soot blowing power consumption is realized based on user demand, so as to ensure that multi-dimensional performance is collaboratively improved in the soot blowing system. If the swing soot blowing mode is adopted, the soot blowing valve is periodically swung by setting amplitude and frequency parameters, so as to break the deposition of the ash layer and improve the soot blowing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is an architecture schematic diagram of a soot blowing system provided by an embodiment of the present application;

[0025] Figure 2 is a structure schematic diagram of an inclination angle adjustment device provided by an embodiment of the present application;

[0026] Figure 3 is a flowchart of a soot blowing valve inclination angle adjustment method provided by an embodiment of the present application;

[0027] Figure 4is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application;

[0029] Figure 6 is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application;

[0030] Figure 7 is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application;

[0031] Figure 8 is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application;

[0032] Figure 9 is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application;

[0033] Figure 10 is a schematic diagram of the change of the particle deposition volume fraction under the action of the ash conveying valve at different inclination angles provided by an embodiment of the present application; DETAILED DESCRIPTION

[0034] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details presented herein, that the present application can be practiced with other than the described embodiments, and that variations of the described embodiments can be made in view of the teachings herein. Thus, the present application is not limited to the embodiments described herein but is instead broad in scope and spirit.

[0035] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of one or more embodiments of the present application. As used in one or more embodiments of the present application and the accompanying claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0036] It should be understood that, although the terms first, second, etc. can be employed in describing various information in one or more embodiments, such information should not be limited by these terms. These terms are only used to distinguish one piece of information from another. For example, a first can be termed a second, and, similarly, a second can be termed a first, without departing from the scope of one or more embodiments. As used herein, the term "if' can be construed to mean "when" or "in response to determining" or "in response to a determination" depending on the context.

[0037] In the prior art, the ash conveying valve is usually installed on the side wall of the pipeline at a fixed inclined angle, relying on the one-way scouring of high-pressure gas flow. The fixed angle is easy to cause uneven dissipation of local flow field energy, forming secondary deposition or accelerating the wear of the pipeline wall. In practical applications, the coal source switching or load fluctuation of a thermal power plant often leads to changes in ash flow characteristics, and the fixed angle valve is difficult to match some ash flow states, resulting in ash deposition, causing loss of system operation efficiency and increase of maintenance cost.

[0038] To overcome the above technical problems, the embodiment of the present application provides an ash conveying valve inclination angle adjusting method, and simultaneously relates to an ash conveying valve inclination angle adjusting device, a computing device, and a computer readable storage medium, which are described in detail one by one in the following embodiments.

[0039] The ash conveying valve inclination angle adjusting method provided by the embodiment of the present application is applied to the inclination angle adjusting device provided by the embodiment of the present application. The inclination angle adjusting device can be configured in the ash conveying system and adaptively and dynamically adjusts the inclination angle of the ash conveying valve of the ash conveying system, thereby solving the problem that the fixed angle valve in the prior art is difficult to match some ash flow states, resulting in ash deposition, causing loss of system operation efficiency and increase of maintenance cost.

[0040] To facilitate understanding of the ash conveying valve inclination angle adjusting method, the inclination angle adjusting device and the ash conveying system provided by the embodiment of the present application, the following will be described in detail with reference to the accompanying drawings.

[0041] Figure 1 An architecture schematic diagram of an ash conveying system is shown.

[0042] Figure 1 The shown system architecture can include an ash bin 101, a fan 102, an inclination angle adjusting device 103, a gas conveying pipeline 104, an ash conveying pipeline 105, an ash conveying valve 106, and a carrier gas guide pipe 107.

[0043] Referring to Figure 1As shown, the ash bin 101 is used to collect ash powder (such as coal ash) and transport it through the ash conveying pipe 105. The ash conveying pipe 105 is provided with an ash conveying valve 106, one end of which is connected to the ash conveying pipe 105, and the other end is connected to the gas conveying pipe 104 through the gas guide pipe 107, which is used to dredge the deposited and blocked ash powder in the ash conveying pipe 105.

[0044] The fan 102 is used to provide compressed air and deliver it into the gas conveying pipe 104. In the ash conveying mode, the ash powder is conveyed in the ash conveying pipe 105, that is, the ash powder flows in the ash conveying pipe 105, and at this time the ash conveying valve 106 is in a closed state. When the ash powder accumulates to form a blockage at a certain point in the pipe, the pressure in front of this point will rise. The pressure rise triggers the detection mechanism of the ash conveying valve 106. When the pressure reaches a first set pressure, the blowing ash mode is entered, triggering the opening of the valve of the ash conveying valve 106, and the compressed air output by the fan 102 enters the ash conveying pipe 105 through the valve of the ash conveying valve 106 to produce a flow impact on the blocked point, generating a disturbance effect to make the ash powder re-suspended and flow. After the deposited ash powder at the blocked point is reduced or the blockage is eliminated, the pipe pressure drops to a second set pressure, triggering the automatic closing of the valve of the ash conveying valve 106, and the blowing ash mode is exited, and the ash conveying mode is restored, and the normal ash conveying is restored.

[0045] Referring to Figure 1 As shown, the inclination adjusting device 103 can be arranged around the ash conveying valve 106 (for example, installed on both sides of the ash conveying valve 106) and configured to adjust the inclination angle of the ash conveying valve 106 in the blowing ash mode, so that the blowing angle of the compressed air flow blown into the ash conveying pipe 105 by the ash conveying valve 106 can be dynamically adjusted, so that the compressed air flow blown into the ash conveying pipe 105 is more suitable for the ash flow state in the ash conveying pipe 105, so as to reduce the deposited ash powder or eliminate the blocked ash powder.

[0046] Figure 2 A structural schematic diagram of the inclination adjusting device provided by an embodiment of the application is shown.

[0047] Figure 2 The inclination adjusting device can include:

[0048] The driving part is used to adjust the inclination angle of the ash conveying valve 106 to a target angle adaptively based on the pressure gradient in the driving ash conveying pipe.

[0049] The support part serves as the support of the inclination adjusting device 103.

[0050] The airtight part is used to seal the connection port of the ash conveying valve 106 and the ash conveying pipe 105.

[0051] Referring to Figure 2As shown, the driving part of the inclination adjusting device 103 can include a rocker 201, a connecting rod 202, a fixed rod 203, a hinge 204, a crank 205, a torque coupling 206, and a motor 207.

[0052] Referring to Figure 2 As shown, the supporting part can include a base 211 and a motor support 212.

[0053] Referring to Figure 2 As shown, the airtight part can include a sealing sleeve 221. It should be noted that in the application scenario of a thermal power plant, the coal ash is mainly composed of silicate and aluminate, and the particle size distribution is concentrated in the range of 0.5-300 μm. The angular shape of the ash causes significant cutting and wear of the sealing material. The dust density in the ash conveying pipeline is very high, which will cause long-term high-speed erosion of the sealing sleeve. Therefore, the selection of the sealing sleeve material is very important to maintain the sealing property. In order to ensure that the sealing sleeve meets the dynamic sealing requirement and the wear resistance, the hydrogenated nitrile rubber is generally used as the sealing sleeve material, and a Kevlar fiber reinforcing layer is additionally arranged inside the sealing sleeve. If there are other special requirements in the thermal power plant, the sealing sleeve material can be replaced, but it must meet the sealing property and the wear resistance.

[0054] In some embodiments, the base 211 serves as the support of the whole inclination adjusting auxiliary device 103, and can be arranged at the lower side of the ash conveying valve 106. The motor support 212 and two hinges 204 can be arranged on the base 211. The motor 207 is arranged on the motor support 212, and the two hinges 204 are respectively connected to one rocker 201. The two rockers 201 are arranged at the two sides of the connecting port of the ash conveying valve 106 and the ash conveying pipeline 105, and the ash conveying valve 106 is fixed between the two rockers 201 through one or more fixed rods 203, wherein the two ends of the fixed rod 203 are fixedly connected to the two rockers 201. The rocker 201 is connected to the crank 205 through the connecting rod 202, one end of the connecting rod 202 is connected to the target position (for example, the center position of the rocker 201) of the rocker 201, and the other end is connected to the crank 205. The crank 205 and the motor 207 are connected through the torque coupling 206. The rocker 201, the connecting rod 202, and the crank 205 form a crank and rocker mechanism. Based on the crank and rocker mechanism, when the inclination of the ash conveying valve 106 needs to be adjusted, the motor 207 is driven to rotate to drive the rocker 201 to swing to a preset angle, and then the motor 207 is stopped, so as to adjust the inclination of the ash conveying valve 106 to the target inclination. When the ash conveying valve 106 needs to swing back and forth within the target inclination range, the motor 207 is controlled to reverse, so as to drive the rocker 201 to swing back and forth within the target inclination range, thereby driving the ash conveying valve 106 to continuously swing back and forth within the target inclination range.

[0055] In some embodiments, to improve the stability of the crank rocker mechanism, multiple rockers 201 and multiple fixed rods 203 can be provided to improve the stability and accuracy of the driving control of the ash conveying valve 106 by the crank rocker mechanism.

[0056] In some embodiments, to reduce the cost of the equipment, one inclination adjusting device 103 can be configured on the ash conveying pipeline 105. In other embodiments, based on the ash conveying requirements, multiple inclination adjusting devices 103 can be configured on the ash conveying pipeline 105 of the ash conveying system, and the spacing of the multiple inclination adjusting devices 103 is set based on the operating environment factors of the ash conveying system. The operating environment factors can include the inner diameter of the ash conveying pipeline 105 and the gas pressure of the output gas of the fan 102. In one implementation, the multiple inclination adjusting devices 103 can be arranged at equal intervals.

[0057] In some embodiments, the ash conveying valve in the ash conveying system provided by the embodiments of the present application can be a pilot-operated ash conveying valve.

[0058] In some embodiments, the carrier gas guide pipe 107 of the ash conveying system can be connected through the carrier gas branch port 108 on the gas conveying pipeline 104.

[0059] In some embodiments, the crank rocker mechanism in the inclination adjusting device can be subject to size constraints, as shown in the following Formula One:

[0060] min(r1,r2,r3,r4)+max(r1,r2,r3,r4)≤sum(r1,r2,r3,r4)-min(r1,r2,r3,r4)-max(r1,r2,r3,r4) Formula One

[0061] r1 represents the rack length (the straight-line distance between the base and the motor support);

[0062] r2 represents the crank length, which needs to be the shortest rod in actual design, and the rack needs to be the adjacent rod to form the crank rocker mechanism;

[0063] r3 represents the connecting rod length;

[0064] r4 represents the rocker length.

[0065] In some embodiments, based on the size constraints of the crank rocker mechanism, the corresponding inclination range of the ash conveying valve is shown in the following Formula Two:

[0066]

[0067] θ represents the total swing angle of the rocker (the swing angle range);

[0068] Δθ offsetφ0represents the initial angle deviation (caused by equipment assembly error).

[0069] In some embodiments, to avoid the phenomenon of jamming during the movement of the crank-rocker mechanism, the included angle γ between the connecting rod and the rocker can be constrained, and the constraint condition of the included angle γ is shown in the following formula three:

[0070] γ∈[40°,140°] Formula three

[0071] In some embodiments, during the process of adjusting the inclination angle of the ash conveying valve by the rocker swing driven by the motor, the crank rotation angle and the rocker rotation angle should satisfy the following implicit constraint relationship, as shown in formula four:

[0072]

[0073] φ represents the crank rotation angle (input angle);

[0074] ψ represents the rocker rotation angle (output angle);

[0075] β represents the included angle between the connecting rod and the horizontal plane (intermediate variable);

[0076] δ x , δ y represents the displacement deviation caused by the joint clearance in the crank-rocker mechanism.

[0077] In some embodiments, based on the constraint relationship of the crank rotation angle and the rocker rotation angle provided in the above formula four, the intermediate variable β can be eliminated, and finally the explicit function relationship between the rocker rotation angle ψ and the crank rotation angle φ is obtained, as shown in formula five:

[0078]

[0079] ψ0represents the initial installation angle (the initial included angle between the rocker and the rack, determined by the assembly process).

[0080] Referring to Figure 3 , Figure 3 A flow chart of an ash conveying valve inclination angle adjustment method according to an embodiment of the present application is shown, which can be applied to the inclination angle adjustment device provided in the embodiments of the present application, and the method specifically includes the following steps.

[0081] Step 301: The inclination angle adjustment device acquires the current pressure value of the target monitoring area in the ash conveying pipeline.

[0082] Step 302: The inclination angle adjustment device determines the target ash blowing mode based on the comparison result of the current pressure value and the pressure gradient threshold value, wherein the ash blowing mode includes the fixed angle ash blowing mode and the swing ash blowing mode;

[0083] Step 303: The inclination adjusting device adjusts the inclination of the ash conveying valve based on the target soot blowing mode.

[0084] Regarding step 301

[0085] In some embodiments, the inclination adjusting device can acquire external data to determine the current pressure value of the target monitoring area in the ash conveying pipeline, which can be a pressure gradient value.

[0086] In other embodiments, the inclination adjusting device can acquire sensing data of the ash flow sensor in the ash conveying pipeline to determine the current pressure value of the target monitoring area in the ash conveying pipeline, which can be a pressure gradient value.

[0087] Regarding step 302

[0088] In some embodiments, the pressure gradient threshold value can be calculated in advance based on the pressure reference threshold value, the ash powder density, the reference density, the ash powder adhesion coefficient, the weight coefficient of adhesion effect, and the influence weight of density and adhesion coefficient.

[0089] In one implementation, the calculation formula of the pressure gradient threshold value is shown in the following Formula Six:

[0090]

[0091] P th represents the pressure gradient threshold value;

[0092] P base represents the reference threshold value (determined by simulation);

[0093] k ρ represents the influence weight of ash powder density and adhesion coefficient;

[0094] ρ0represents the reference density (default is 1.2 g / cm 3 );

[0095] ρ(t) represents the ash powder density;

[0096] k τ represents the weight coefficient of adhesion effect;

[0097] τ dust represents the ash particle adhesion coefficient (fitted based on historical maintenance data);

[0098] In some embodiments, after acquiring the current pressure value (pressure gradient) of the target monitoring area, it can be compared with the pressure gradient threshold value P th , and the target soot blowing mode is determined according to the comparison result, and the specific comparison method and mode determination method can be shown in the following Formula Seven:

[0099]

[0100] wherein, denotes the duration of Δt.

[0101] Based on the target soot blowing mode determination method described in the above Formula Seven, when the pressure gradient of the target monitoring area is detected greater than the pressure gradient threshold value P th and the duration is greater than or equal to the time threshold value (30s), it can be determined that the target soot blowing mode is the swing soot blowing mode, otherwise, it is the fixed angle soot blowing mode. It should be noted that the time threshold value can be customized based on user requirements, and the present application does not limit this.

[0102] Regarding step 303

[0103] In some embodiments, when the target soot blowing mode is the fixed angle soot blowing mode, adjusting the inclination angle of the soot blowing valve based on the target soot blowing mode can include adjusting the inclination angle of the soot blowing valve to a target fixed inclination angle, wherein the target fixed inclination angle includes a first fixed inclination angle and / or a second fixed inclination angle. The first fixed inclination angle is an inclination angle that is calculated in advance to have the highest soot blowing efficiency (i.e., the shortest soot blowing time) compared to other inclination angles, and in one implementation, the first fixed inclination angle is 45°. The second fixed inclination angle is an inclination angle that is calculated in advance to have the lowest soot blowing power consumption compared to other inclination angles, and in one implementation, the second fixed inclination angle is 65°. It should be noted that the inclination angle refers to the angle between the soot blowing valve and the horizontal plane.

[0104] In some embodiments, the method of evaluating and determining the target fixed inclination angle can include keeping the soot blowing valve stationary after adjusting it to the optimal inclination angle through the crank rocker mechanism, and optimizing the ash flow mechanics performance using the geometric angle of the soot blowing valve, wherein the adjustment process is shown in Formula Eight:

[0105]

[0106] U(t) represents the motor driving voltage;

[0107] ψ enc represents the encoder feedback angle;

[0108] ψ opt represents the optimal inclination angle.

[0109] During the optimal inclination angle adjustment process by the above method, the PID control gain can be used.

[0110] The optimal inclination angle adjustment process is described in detail below through a specific example.

[0111] The effects of different inclination angles of the pilot valve on the particle deposition volume fraction and particle transport velocity in a 10 m horizontal ash conveying pipeline were analyzed by numerical simulation method. Figure 4 and Figure 5 As shown in the figures, the particle deposition volume fraction is significantly reduced after the addition of a single inlet velocity of 5 m / s, different inclination angles of the pilot valve. With the increase of distance, the effect of the pilot valve is gradually weakened, and the influence of gas disturbance on particle motion gradually decreases, and the particle volume fraction gradually increases. However, under different inclination angles, the effect of the pilot valve is different. When the inclination angle of the pilot valve changes from 35° to 55°, the action distance changes, and when the inclination angle is 45°, the action distance of the pilot valve is the longest. Under the action of the pilot valve with different inclination angles, the particle transport velocity also has significant differences. When the inclination angle is 45°, the pilot valve has the best dredging effect, and the particle velocity changes the fastest.

[0112] In some embodiments, when the target sootblowing mode is the swing sootblowing mode, the inclination angle adjusting device adjusts the inclination angle of the ash conveying valve based on the target sootblowing mode can include: controlling the ash conveying valve to periodically swing around the target inclination angle at a preset amplitude and a preset frequency.

[0113] In some embodiments, the target inclination angle range can be calculated in advance,

[0114] In an implementation, the target inclination angle can be calculated based on the swing reference angle, the preset amplitude, and the preset frequency. Specifically, the target inclination angle can be calculated by the following Formula Nine:

[0115] ψ ref = ψ0 + A·sgn[sin(2πft)] Formula Nine

[0116] ψ ref represents the target inclination angle;

[0117] ψ0 represents the swing reference angle (valve swing center position);

[0118] A represents the preset amplitude;

[0119] f represents the preset frequency.

[0120] In some embodiments, controlling the ash conveying valve to periodically swing around the target inclination angle at a preset amplitude and a preset frequency can include controlling the motor-driven crank rocker mechanism to control the ash conveying valve to periodically swing around the target inclination angle at a preset amplitude and a preset frequency.

[0121] In an implementation, the calculation method of the motor driving voltage for controlling the motor-driven crank rocker mechanism to control the ash conveying valve to periodically swing around the target inclination angle at a preset amplitude and a preset frequency is shown in the following Formula Ten:

[0122]

[0123] U(t) represents the motor driving voltage;

[0124] ψ ref represents the target inclination angle;

[0125] J total represents the equivalent rotational inertia of the motor rotor, reducer, valve and connecting rod;

[0126] K u represents the voltage-torque coefficient;

[0127] t represents time;

[0128] B total represents the total damping coefficient of the system.

[0129] The ash conveying valve inclination angle adjusting method provided by the embodiment of the application adopts a crank rocker mechanism as the inclination angle adjusting core structure, and avoids the mechanism jamming problem in the working process through constraint analysis. An explicit mapping model of the crank rotation angle and the ash conveying valve inclination angle is established based on the kinematic equation, so as to realize accurate control of the inclination angle adjustment. If the fixed angle blowing mode is adopted, the optimal inclination angle is calibrated based on the calculation of the particle fluid mechanics simulation, and the angle deviation is corrected in real time by combining the PID controller, so that the ash flow velocity field distribution tends to be ideal, the maximum blowing efficiency or the blowing power consumption is reduced based on the user demand, so as to ensure the collaborative improvement of the multi-dimensional performance in the ash conveying system. If the swing blowing mode is adopted, the amplitude and frequency parameters are set to drive the ash conveying valve to swing periodically to break the ash layer deposition and improve the blowing efficiency.

[0130] In some embodiments in which multiple inclination angle adjusting devices are configured, the corresponding ash conveying valves can be dynamically adjusted in inclination angle by the multiple inclination angle adjusting devices, so as to realize multi-angle and multi-point blowing of the deposited ash. For example, for a 10m horizontal ash conveying pipeline in which multiple pilot-type ash conveying valves are installed. Each pilot-type ash conveying valve is configured with an independent inclination angle adjusting device. The inlet air speed of the pilot-type ash conveying valve is 5m / s, the distance between adjacent pilot-type ash conveying valves is 1900mm, and a total of 5 pilot-type ash conveying valves are installed. As shown in FIG. 6, the inclination angle of each pilot-type ash conveying valve is dynamically adjusted by the inclination angle adjusting device, so as to realize multi-angle and multi-point blowing of the deposited ash. Figures 6 to 8As shown, based on data analysis, after the pilot ash conveying valve is added, the particle velocity in the pipe increases significantly. When the inclination angle is 25°, the gas dredging effect is mainly near the top of the pipe, which has a significant dispersing effect on the large particle groups in the upper part of the pipe, but the dispersing effect on the particle layer is limited. When the inclination angle changes from 25° to 65°, the auxiliary gas inlet continuously strengthens the dredging effect on the entire particle layer, and the particle volume fraction decreases obviously. Taking the time and power consumption of completing the conveying of particles as the analysis parameters, it can be found that when the inclination angle increases from 25° to 45°, the conveying time decreases and the power consumption increases. When the inclination angle increases from 45° to 65°, the conveying time increases and the power consumption coefficient decreases. When the inclination angle is 45°, the conveying time takes the minimum value, but the power consumption is the maximum value. Therefore, in order to ensure the working efficiency, the optimal inclination angle in the fixed inclination mode should be defaulted as 45°, but in the actual working condition, it should be adjusted according to the actual demand of the thermal power plant.

[0131] Corresponding to the method embodiments, the application also provides ash conveying valve inclination angle adjusting device embodiments, Figure 9 The structure of an ash conveying valve inclination angle adjusting device provided by an embodiment of the application is shown. As shown in the figure, Figure 9 The device comprises:

[0132] An information acquisition module 901 is configured to acquire a current pressure value of a target monitoring area in an ash conveying pipeline.

[0133] A mode confirmation module 902 is configured to determine a target ash blowing mode based on a comparison result of the current pressure value and a pressure gradient threshold value, wherein the ash blowing mode comprises a fixed angle ash blowing mode and a swing ash blowing mode.

[0134] An inclination angle adjusting module 903 is configured to adjust the inclination angle of the ash conveying valve based on the target ash blowing mode.

[0135] In a possible implementation, the method further comprises: pre-calculating the pressure gradient threshold value based on a pressure reference threshold value, an ash powder density, a reference density, an ash powder adhesion coefficient, a weight coefficient of adhesion effect, and an influence weight of the density and the adhesion coefficient.

[0136] In a possible implementation, the pre-calculating the pressure gradient threshold value based on the pressure reference threshold value, the ash powder density, the reference density, the ash powder adhesion coefficient, the weight coefficient of adhesion effect, and the influence weight of the density and the adhesion coefficient comprises calculating by the following formula:

[0137]

[0138] k ρ represents the pressure gradient threshold value, P base represents the reference threshold value, k ρrepresents the weight of the influence of the ash density and the adhesion coefficient, p0 represents the reference density, p(t) represents the ash density, k τ represents the weight coefficient of the adhesion effect, τ dust represents the ash particle adhesion coefficient.

[0139] In a possible implementation, the determining the target soot blowing mode based on the comparison result of the current pressure value and the pressure gradient threshold value comprises:

[0140] determining whether the current pressure value is greater than the pressure gradient threshold value and the duration is not less than a time threshold value; if yes, determining the target soot blowing mode as the swing soot blowing mode, and if no, determining the target soot blowing mode as the fixed-angle soot blowing mode.

[0141] In a possible implementation, the adjusting the inclination angle of the soot blowing valve based on the target soot blowing mode comprises: when the target soot blowing mode is the fixed-angle soot blowing mode, adjusting the inclination angle of the soot blowing valve to a target fixed inclination angle; wherein the target fixed inclination angle comprises a first fixed inclination angle and / or a second fixed inclination angle, the first fixed inclination angle is an inclination angle with the shortest soot blowing time compared with other inclination angles, and the second fixed inclination angle is an inclination angle with the lowest power consumption compared with other inclination angles.

[0142] In a possible implementation, the adjusting the inclination angle of the soot blowing valve based on the target soot blowing mode comprises: when the target soot blowing mode is the swing soot blowing mode, controlling the soot blowing valve to periodically swing around a target inclination angle with a preset amplitude and a preset frequency.

[0143] The above is a schematic scheme of the soot blowing valve inclination angle adjusting device of the embodiment. It should be noted that the technical scheme of the soot blowing valve inclination angle adjusting device and the technical scheme of the soot blowing valve inclination angle adjusting method described above belong to the same concept, and the technical scheme of the soot blowing valve inclination angle adjusting device that is not described in detail can be referred to the description of the technical scheme of the soot blowing valve inclination angle adjusting method.

[0144] Figure 10 A structural block diagram of a computing device 500 is shown according to an embodiment of the present application. The components of the computing device 500 include but are not limited to a memory 510 and a processor 520. The processor 520 is connected with the memory 510 through a bus 530, and a database 550 is used to save data.

[0145] The computing device 500 also includes an access device 540 that enables the computing device 500 to communicate via one or more networks 560. Examples of such networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or combinations of such networks, such as the Internet. The access device 540 can include one or more of any type of network interface (for example, a network interface card (NIC)) such as a wired or wireless network interface, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a Worldwide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a Universal Serial Bus (USB) interface, a cellular network interface, a Bluetooth interface, Near Field Communication (NFC).

[0146] In one embodiment of the present application, the above-described components of the computing device 500, as well as other components not shown in FIG. 5, can be connected to each other by a bus. It should be understood that Figure 5 Figure 5 The computing device structure diagram shown is merely for the purpose of example, and is not a limitation on the scope of the present application. Other components can be added or replaced by those skilled in the art as needed.

[0147] The computing device 500 can be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (for example, a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, and the like), a mobile phone (for example, a smartphone), a wearable computing device (for example, a smart watch, smart glasses, and the like), or other types of mobile devices, or a stationary computing device such as a desktop computer or a personal computer (PC). The computing device 500 can also be a mobile or stationary server.

[0148] ​The processor 520 is configured to execute computer-executable instructions, which, when executed by the processor, implement the steps of the method for adjusting the inclination angle of the ash conveying valve. The above describes a schematic solution of the computing device of the embodiment. It should be noted that the technical solution of the computing device and the technical solution of the method for adjusting the inclination angle of the ash conveying valve belong to the same concept, and details of the technical solution of the computing device not described in detail can be referred to the description of the technical solution of the method for adjusting the inclination angle of the ash conveying valve.

[0149] An embodiment of the present application further provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the method for adjusting the inclination angle of the ash conveying valve.

[0150] The above describes a schematic solution of the computer-readable storage medium of the embodiment. It should be noted that the technical solution of the storage medium and the technical solution of the method for adjusting the inclination angle of the ash conveying valve belong to the same concept, and details of the technical solution of the storage medium not described in detail can be referred to the description of the technical solution of the method for adjusting the inclination angle of the ash conveying valve.

[0151] An embodiment of the present application further provides a computer program, which, when executed in a computer, causes the computer to perform the steps of the method for adjusting the inclination angle of the ash conveying valve.

[0152] The above describes a schematic solution of the computer program of the embodiment. It should be noted that the technical solution of the computer program and the technical solution of the method for adjusting the inclination angle of the ash conveying valve belong to the same concept, and details of the technical solution of the computer program not described in detail can be referred to the description of the technical solution of the method for adjusting the inclination angle of the ash conveying valve.

[0153] The specific embodiments of the present application are described above. Other embodiments are within the scope of the claims. In some cases, the actions or steps recited in the claims can be performed in a different order and still achieve desirable results. In addition, the process depicted in the figures does not necessarily require the particular order shown or sequential order to achieve desirable results. In certain implementations, multitasking and parallel processing can be advantageous.

[0154] The computer readable medium can include any entity or apparatus capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, software distribution medium, etc. It should be noted that the computer readable medium can include appropriate additions or subtractions according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.

[0155] It should be noted that, for the foregoing method embodiments, in order to facilitate description, they are all described as a combination of a series of actions, but those skilled in the art should know that the embodiments of the present application are not limited to the order of the actions described, because according to the embodiments of the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the embodiments of the present application.

[0156] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0157] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The alternative embodiments do not describe all the details and limit the application to the specific embodiments described. Obviously, according to the content of the embodiments of the present application, many modifications and changes can be made. The present application selects and describes these embodiments in order to better explain the principles and practical applications of the embodiments of the present application, so that those skilled in the art can well understand and use the present application. The present application is limited by the claims and their entire scope and equivalents.

Claims

1. A tilt angle adjustment device, characterized in that The application relates to a kind of angle adjusting devices, comprising: Driving part and support part; The support part includes base and motor support; The driving part includes at least two rocker arms, connecting rods, fixed rods, at least two hinges, cranks, torque couplings and motors; Wherein, the motor support and the hinge are arranged on the base, the motor is arranged on the motor support, one end of the rocker arm is connected with the hinge, the at least two rocker arms are fixed by the fixed rod, one of the at least two rocker arms is connected with the crank 205 through the connecting rod, the crank and the motor are connected through the torque coupling, and the rocker arm, the connecting rod and the crank are connected to form a crank rocker mechanism; Wherein, the motor drives the crank rocker mechanism to control the movement of the ash conveying valve to the target inclination angle in response to the control instruction.

2. A method of adjusting the angle of inclination of a cement delivery valve, characterized in that, The application is applied to the angle adjusting device in claim 1, comprising: obtaining a current pressure value of a target monitoring area in an ash conveying pipeline; determining a target soot blowing mode based on a comparison result of the current pressure value and a pressure gradient threshold value, wherein the soot blowing mode includes a fixed angle soot blowing mode and a swing soot blowing mode; adjusting the inclination angle of the ash conveying valve based on the target soot blowing mode.

3. The method of claim 2, wherein, The method further comprises: calculating the pressure gradient threshold value based on a pressure reference threshold value, an ash powder density, a reference density, an ash powder adhesion coefficient, a weight coefficient of adhesion effect, and an influence weight of density and adhesion coefficient.

4. The method of claim 3, wherein, The calculation of the pressure gradient threshold value based on the pressure reference threshold value, the ash powder density, the reference density, the ash powder adhesion coefficient, the weight coefficient of adhesion effect, and the influence weight of density and adhesion coefficient includes calculation by the following formula: k ρ denotes a pressure gradient threshold, P base denotes a reference threshold, k ρ denotes the influence weight of the ash density and the adhesion coefficient, p0 denotes a reference density, p(t) denotes the ash density, k τ denotes the weight coefficient of the adhesion effect, t dust denotes the ash particle adhesion coefficient.

5. The method according to any one of claims 2 to 4, characterized in that, The determination of the target soot blowing mode based on the comparison result of the current pressure value and the pressure gradient threshold value includes: determining whether the current pressure value is greater than the pressure gradient threshold value and the duration is not less than a time threshold value; if yes, the target soot blowing mode is determined as the swing soot blowing mode, and if not, the target soot blowing mode is determined as the fixed angle soot blowing mode.

6. The method of claim 5, wherein, The adjustment of the inclination angle of the ash conveying valve based on the target soot blowing mode includes: when the target soot blowing mode is the fixed angle soot blowing mode, adjusting the inclination angle of the ash conveying valve to a target fixed inclination angle; wherein the target fixed inclination angle includes a first fixed inclination angle and / or a second fixed inclination angle, the first fixed inclination angle is the inclination angle with the shortest time for ash conveying compared with other inclination angles, and the second fixed inclination angle is the inclination angle with the lowest power consumption compared with other inclination angles.

7. The method of claim 5, wherein, The adjustment of the inclination angle of the ash conveying valve based on the target soot blowing mode includes: when the target soot blowing mode is the swing soot blowing mode, controlling the ash conveying valve to periodically swing around a target inclination angle at a preset amplitude and a preset frequency.

8. A dust conveying valve inclination angle adjusting device, characterized by, Comprising: An information acquisition module configured to acquire a current pressure value of a target monitoring area in an ash conveying pipeline. A mode confirmation module configured to determine a target soot blowing mode based on a comparison result of the current pressure value and a pressure gradient threshold value, wherein the soot blowing mode includes a fixed angle soot blowing mode and a swing soot blowing mode. An inclination angle adjustment module configured to adjust the inclination angle of the ash conveying valve based on the target soot blowing mode.

9. A computing device, comprising: Comprising: a memory and a processor. The memory is configured to store computer-executable instructions, and the processor is configured to execute the computer-executable instructions, which, when executed by the processor, implement the steps of the method for adjusting the inclination angle of the ash conveying valve according to any one of claims 1 to 7. 10.A computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the steps of the method for adjusting the inclination angle of the ash conveying valve according to any one of claims 1 to 7.

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