Equipment starting mode based on progressive control

Abstract

The invention relates to the technical field of thermal power generation equipment, in particular to an equipment starting mode based on progressive control, which comprises the following steps that: hierarchical equipment starting is divided into first-level equipment, second-level equipment and third-level equipment, and the first-level equipment has the highest level; when the whole equipment is started or stopped, starting is started from low-level equipment in a sequential control and automatic control mode, and after the low-level equipment is started, a preset judgment condition is met, a starting permission condition of a previous level is met, and a starting process of the previous level is started until the first-level equipment is completely started; compared with the prior art, the control process which is complex in operation and large in data processing amount is programmed through sequential control nesting, interlocking and an automatic control loop in a progressive control equipment starting mode, the automatic control level of a unit is improved, and possible misoperation and operation intensity of personnel in the unit starting process are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of thermal power generation equipment, in particular to an equipment starting method based on progressive control. Background Art

[0002] Under the background of new power system, units participate in flexible peak load regulation, and the frequency of equipment start-up and shutdown increases. The manual start-up and shutdown operations of important auxiliary equipment of large-capacity units, such as three large fans, water supply pumps and other equipment, are complicated. During the unit startup process, personnel may make misoperations and the operation intensity is too high, which is not conducive to the operation personnel to find problems in time. The unit operating parameters fluctuate greatly, which seriously affects the safe operation of the unit. Therefore, the present invention proposes a device startup method based on progressive control that can solve the above problems. Summary of the invention

[0003] The purpose of the present invention is to provide a device startup method based on progressive control to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: a device startup method based on progressive control, comprising dividing the startup of hierarchical devices into first-level devices, second-level devices, third-level devices, etc., wherein the first-level devices have the highest level;

[0005] When the whole equipment is started or stopped, the lower-level equipment starts to start through sequential control and automatic control. After the lower-level equipment starts and reaches the preset judgment conditions, it meets the start permission conditions of the upper level and starts the start process of the upper level until the first-level equipment is fully started.

[0006] As a preferred technical solution of the present invention, the first-level equipment includes a boiler ignition function group;

[0007] The second level equipment includes: single-side induced draft fan start function group, denitrification function group, furnace front oil system function group, furnace purge function group, plasma arc function group, pre-selected primary fan start function group, pre-selected sealed fan start function group, coal mill start function group;

[0008] The third level equipment includes: induced draft fan start function group and supply fan start function group.

[0009] As a preferred technical solution of the present invention, the start-up permission conditions of the boiler ignition function group are:

[0010] a. Any lubricating oil pump in the fan oil station is running, and the lubricating oil pressure and flow are normal;

[0011] b. At the induced draft fan oil station, any lubricating oil pump is running, the lubricating oil pressure and flow are normal, and the induced draft fan cooling fan is running normally;

[0012] c. Air preheater A / B operates normally;

[0013] d. Any plasma cooling water pump is running, and the water pressure is greater than 0.8Mpa;

[0014] e. Check and confirm that the air pressure, water pressure and flow rate in the front and rear chambers of the four-corner plasma generator are sufficient.

[0015] As a preferred technical solution of the present invention, a method for judging whether the induced draft fan cooling fan is operating normally is that either cooling fan A or cooling fan B is operating.

[0016] As a preferred technical solution of the present invention, the start permission condition a of the boiler ignition function group can also be used as the start condition of the blower start function group, and the start permission condition b of the boiler ignition function group can also be used as the start condition of the induced draft fan start function group.

[0017] As a preferred technical solution of the present invention, when the first-level equipment executes to its fifth step, the single-side supply and exhaust fan start function group of the second-level equipment is executed;

[0018] When the first-level equipment executes to its sixth step, the denitrification function group of the second-level equipment is executed;

[0019] When the first-level equipment executes to its 7th step, the furnace oil system function group of the second-level equipment is executed;

[0020] When the first-level equipment executes to its 10th step, the furnace purge function group of the second-level equipment is executed;

[0021] When the first-level equipment executes to its 11th step, the plasma arc drawing function group of the second-level equipment is executed;

[0022] When the first-level device executes to its 12th step, the pre-selected fan start function group of the second-level device is executed;

[0023] When the first-level equipment executes to its 13th step, the preselected sealing fan start function group of the second-level equipment is executed;

[0024] When the first-level equipment executes to its 14th step, the coal mill startup function group of the second-level equipment is executed.

[0025] As a preferred technical solution of the present invention, when the single-side induced draft fan start function group is executed to its fourth step, the induced draft fan start function group of the third-level equipment is executed;

[0026] When the single-side exhaust fan start-up function group is executed to its 5th step, the exhaust fan start-up function group of the third-level equipment is executed.

[0027] As a preferred technical solution of the present invention, after the blower start-up function group is completed, it is determined that the blower has been started, the current is normal, the outlet isolation door is open, and the blower vibration and other measuring points are checked to be normal. After they are normal, the blower blades are opened to control the air volume and the furnace negative pressure to be stable.

[0028] As a preferred technical solution of the present invention, after the induced draft fan startup function group is completed, it is judged that the induced draft fan has been started, the current is normal, the inlet and outlet isolation doors are open, and the induced draft fan vibration and other measurement points are normal.

[0029] As a preferred technical solution of the present invention, during the startup process, the corresponding satisfied conditions can be modified and adjusted, and corresponding bypass, skip, pause and continue operations can be performed.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention discloses a device startup method based on progressive control. The device startup method based on progressive control realizes programming by utilizing sequential control nesting, interlocking and automatic control loops to realize complex operation and large data processing control process, thereby improving the automation control level of the unit, improving the safety, flexibility and adaptability of the unit startup, reducing possible misoperation and operation intensity of personnel during the unit startup process, and facilitating the operation personnel to discover problems in a timely manner.

[0032] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the device startup method flow of the present invention;

[0034] Figure 2 It is a schematic diagram of the boiler ignition function group flow chart of the present invention; DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figure 1-2 In this embodiment, a device startup method based on progressive control is provided, including dividing the startup of hierarchical devices into first-level devices, second-level devices, third-level devices, etc., wherein the first-level devices have the highest level;

[0037] When the whole equipment is started or stopped, the lower-level equipment starts to start, and starts to start through sequential control and automatic control. After the lower-level equipment starts, it reaches the pre-set judgment conditions, meets the start-up permission conditions of the upper level, and starts the start-up process of the upper level until the first-level equipment is fully started. Take the boiler ignition function group as an example:

[0038]

[0039] The above table is a sequential control function group table.

[0040] In this embodiment, the first level equipment includes a boiler ignition function group;

[0041] The second level equipment includes: single-side induced draft fan start function group, denitrification function group, furnace front oil system function group, furnace purge function group, plasma arc function group, pre-selected primary fan start function group, pre-selected sealed fan start function group, coal mill start function group;

[0042] The third level equipment includes: induced draft fan start function group, forced draft fan start function group;

[0043] The second-level device is allowed to start only after the third-level device meets the conditions and the comprehensive judgment conditions are added. After the second-level device conditions are met, the comprehensive judgment serves as the start-up permission condition for the first-level device.

[0044] In this embodiment, the start-up permission conditions of the boiler ignition function group are:

[0045] a. Any lubricating oil pump in the fan oil station is running, and the lubricating oil pressure and flow are normal;

[0046] b. At the induced draft fan oil station, any lubricating oil pump is running, the lubricating oil pressure and flow are normal, and the induced draft fan cooling fan is running normally. The judgment method for the normal operation of the induced draft fan cooling fan is: any one of the cooling fans A and B is running;

[0047] c. Air preheater A / B operates normally;

[0048] d. Any plasma cooling water pump is running, and the water pressure is greater than 0.8Mpa;

[0049] e. Check and confirm that the air pressure, water pressure and flow rate in the front and rear chambers of the four-corner plasma generator are sufficient.

[0050] In this embodiment, the start permission condition a of the boiler ignition function group can also be used as the start condition of the blower start function group, and the start permission condition b of the boiler ignition function group can also be used as the start condition of the induced draft fan start function group.

[0051] In this embodiment, when the first-level equipment executes to its 5th step, the single-side supply and exhaust fan start function group of the second-level equipment is executed;

[0052] Among them, when executing the single-sided induced draft fan startup function group, close the induced draft fan inlet and outlet dampers and the moving blades to the minimum. Close the induced draft fan outlet damper and the moving blades to the minimum. At this time, it is necessary to establish an air duct, open the outlet isolation door of the opposite side induced draft fan, open the secondary air isolation door of the air preheater A and B outlets, open the cold secondary air connecting pipe isolation door, open the electrostatic precipitator outlet connection door, and open the opposite side induced draft fan moving blades to 50%. After the air duct is established, when the single-sided induced draft fan startup function group is executed to its 4th step, the induced draft fan startup function group of the third-level equipment is executed;

[0053] After the induced draft fan start function group is completed, it is judged that the induced draft fan has been started, the current is normal, the inlet and outlet isolation doors are open, and the induced draft fan vibration and other measurement points are normal;

[0054] When the single-side exhaust fan start function group is executed to its 5th step, the exhaust fan start function group of the third-level equipment is executed;

[0055] After the blower start function group is completed, it is determined that the blower has been started, the current is normal, the outlet isolation door is open, and the blower vibration and other measuring points are checked to be normal. After normal, the blower blades are turned on to control the air volume and the furnace negative pressure to be stable;

[0056] When the first-level equipment executes to its sixth step, the denitrification function group of the second-level equipment is executed;

[0057] When the first-level equipment executes to its 7th step, the furnace oil system function group of the second-level equipment is executed;

[0058] When the first-level equipment executes to its 10th step, the furnace purge function group of the second-level equipment is executed;

[0059] When the first-level equipment executes to its 11th step, the plasma arc drawing function group of the second-level equipment is executed;

[0060] When the first-level device executes to its 12th step, the pre-selected fan start function group of the second-level device is executed;

[0061] When the first-level equipment executes to its 13th step, the preselected sealing fan start function group of the second-level equipment is executed;

[0062] When the first-level equipment executes to its 14th step, the coal mill startup function group of the second-level equipment is executed.

[0063] It should be noted that during the startup process, the corresponding satisfied conditions can be modified and adjusted, and corresponding operations such as bypass, skip, pause, and continue can be performed.

[0064] In this embodiment, eight second-level sequential controls are nested in the first-level sequential control, and two third-level sequential controls are nested in the second-level sequential control single-side induced draft fan startup function group. Sequential control nesting, interlocking and automatic control loops are used to achieve programming, improve the level of automatic control of the unit, improve the safety, flexibility and adaptability of unit startup, reduce possible misoperation and operation intensity of personnel during unit startup, and help operators to find problems in time. Through sequential control nesting, the major function of boiler ignition is realized, which reduces a large amount of operation for operators, reduces the error rate of operation, improves the work efficiency of operators, and enhances the level of intelligent startup of equipment.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device startup method based on progressive control, characterized in that: The method includes dividing the startup of hierarchical devices into first-level devices, second-level devices, and third-level devices, wherein the first-level devices have the highest level; When the whole equipment is started or stopped, the lower-level equipment starts to start through sequential control and automatic control. After the lower-level equipment starts and reaches the preset judgment conditions, it meets the start permission conditions of the upper level and starts the start process of the upper level until the first-level equipment is fully started.

2. A device startup method based on progressive control according to claim 1, characterized in that: The first level equipment includes a boiler ignition function group; The second level equipment includes: single-side induced draft fan start function group, denitrification function group, furnace front oil system function group, furnace purge function group, plasma arc function group, pre-selected primary fan start function group, pre-selected sealed fan start function group, coal mill start function group; The third level equipment includes: induced draft fan start function group and supply fan start function group.

3. A device startup method based on progressive control according to claim 2, characterized in that: The start-up permission conditions of the boiler ignition function group are: a. Any lubricating oil pump in the fan oil station is running, and the lubricating oil pressure and flow are normal; b. At the induced draft fan oil station, any lubricating oil pump is running, the lubricating oil pressure and flow are normal, and the induced draft fan cooling fan is running normally; c. Air preheater A / B operates normally; d. Any plasma cooling water pump is running, and the water pressure is greater than 0.8Mpa; e. Check and confirm that the air pressure, water pressure and flow rate in the front and rear chambers of the four-corner plasma generator are sufficient.

4. A device startup method based on progressive control according to claim 3, characterized in that: The method for judging whether the induced draft fan cooling fan is operating normally is: either cooling fan A or cooling fan B is operating.

5. A device startup method based on progressive control according to claim 4, characterized in that: The start permission condition a of the boiler ignition function group can also be used as the start condition of the blower start function group, and the start permission condition b of the boiler ignition function group can also be used as the start condition of the induced draft fan start function group.

6. A device startup method based on progressive control according to claim 5, characterized in that: in, When the first-level equipment executes to its 5th step, the single-side supply and exhaust fan start function group of the second-level equipment is executed; When the first-level equipment executes to its sixth step, the denitrification function group of the second-level equipment is executed; When the first-level equipment executes to its 7th step, the furnace oil system function group of the second-level equipment is executed; When the first-level equipment executes to its 10th step, the furnace purge function group of the second-level equipment is executed; When the first-level equipment executes to its 11th step, the plasma arc drawing function group of the second-level equipment is executed; When the first-level device executes to its 12th step, the pre-selected fan start function group of the second-level device is executed; When the first-level equipment executes to its 13th step, the preselected sealing fan start function group of the second-level equipment is executed; When the first-level equipment executes to its 14th step, the coal mill startup function group of the second-level equipment is executed.

7. A device startup method based on progressive control according to claim 6, characterized in that: When the single-side induced draft fan start function group is executed to its 4th step, the induced draft fan start function group of the third-level equipment is executed; When the single-side exhaust fan start-up function group is executed to its 5th step, the exhaust fan start-up function group of the third-level equipment is executed.

8. A device startup method based on progressive control according to claim 7, characterized in that: After the blower start-up function group is completed, it is determined that the blower has been started, the current is normal, the outlet isolation door is open, and the blower vibration and other measuring points are checked to be normal. After they are normal, the blower blades are opened to control the air volume and the furnace negative pressure to be stable.

9. A device startup method based on progressive control according to claim 7, characterized in that: After the induced draft fan start function group is completed, it is determined that the induced draft fan has been started, the current is normal, the inlet and outlet isolation doors are open, and the induced draft fan vibration and other measurement points are normal.

10. The device startup method based on progressive control according to claim 1, characterized in that: During the startup process, the corresponding conditions can be modified and adjusted, and corresponding bypass, skip, pause, and continue operations can be performed.

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