Automatic oil feeding method and automatic oil feeding device

Abstract

The application provides an automatic oil injection method and an automatic oil injection device. The automatic oil injection method comprises the following specific steps: monitoring the pressure and the flame intensity in a boiler furnace in real time to obtain a real-time furnace negative pressure value and a real-time flame intensity value; matching the furnace negative pressure value with a preset pressure threshold range to obtain a negative pressure matching result; matching the flame intensity value with a preset flame intensity threshold to obtain a flame detection matching result; generating an oil gun control instruction according to the unit load, the negative pressure matching result and the flame detection matching result; and controlling the oil gun unit in a hot standby state to perform a combined action according to the oil gun control instruction, so that a technical solution capable of automatically and timely injecting oil to maximize the prevention of the occurrence of a boiler coking and fire extinguishing event in thermal power generation is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil injection control in thermal power generation, and in particular to an automatic oil injection method and an automatic oil injection device. BACKGROUND

[0002] In China, more thermal power generating units burn anthracite, and the coal fed into the furnace is prone to deviate from the design and the checked coal type. In addition, there are problems such as the burner angle skewing during the installation of the boiler, the arrangement of the heat dissipation zone, and the unreasonable design of the secondary air system. In the operation of the boiler, serious coking often occurs, which easily leads to the boiler extinguishing event caused by coking collapse, greatly affecting the reliability of the generating unit. At the same time, the boiler extinguishing caused by coking collapse will cause the boiler to shrink sharply, resulting in the damage of the water-cooled wall.

[0003] For this, the existing technical solution is to increase an industrial television on the side of a certain height layer of the boiler and lead it to a centralized control large screen, and to lead the 0-meter slag conveyer area monitoring to the centralized control large screen. The operator injects oil to stabilize the combustion in time according to the change of the industrial television during coking collapse and the splashing of the slag conveyer ship body. However, the energy of a person is limited, and there are problems such as the insufficient configuration of the operator in some power plants, the long-term burning of poor-quality coal, the frequent coal interruption of the coal feeder, and the high requirement for the adjustment of the denitration parameters after the ultra-low transformation, which result in a very large workload of the operator monitoring and operation. The operator can not discover the problem in time, and the failure to inject oil in time to stabilize the combustion after coking collapse will lead to the deterioration of the boiler combustion and cause the extinguishing event.

[0004] Therefore, in order to maximize the avoidance of the boiler coking collapse and extinguishing event in thermal power generation, there is an urgent need for a technical solution of automatic and timely oil injection from the aspects of equipment management and thermal automatic logic optimization and transformation. SUMMARY

[0005] To solve the above technical problems, the present application provides an automatic oil injection method and an automatic oil injection device. Based on the pressure and the flame intensity in the boiler furnace, and in combination with the unit load condition, the coking collapse and extinguishing trend is timely controlled, and the oil gun unit in the hot standby state is used for timely oil injection treatment, so as to realize a technical solution of automatic and timely oil injection to maximize the avoidance of the boiler coking collapse and extinguishing event in thermal power generation.

[0006] The present application provides an automatic oil injection method, which comprises the following specific steps:

[0007] Real-time monitoring of the pressure and the flame intensity in the boiler furnace obtains real-time furnace negative pressure value and flame intensity value;

[0008] Matching the furnace negative pressure value with a preset pressure threshold range obtains a negative pressure matching result;

[0009] matching the flame intensity value with a preset flame intensity threshold value to obtain a fire detection matching result;

[0010] generating an oil gun control instruction according to the unit load, the negative pressure matching result and the fire detection matching result;

[0011] controlling the oil gun unit in the hot standby state to perform a combined action according to the oil gun control instruction.

[0012] Further, the preset pressure threshold range includes a first preset pressure threshold range and a second preset pressure threshold range.

[0013] The first preset pressure threshold range is composed of a first preset positive boundary value and a first preset negative boundary value.

[0014] The second preset pressure threshold range is composed of a second preset positive boundary value and a second preset negative boundary value.

[0015] The second preset positive boundary value is greater than the first preset positive boundary value, and the second preset negative boundary value is less than the first preset negative boundary value.

[0016] Further, the oil gun unit includes a first oil gun group and a second oil gun group.

[0017] The oil gun control instruction includes a first oil injection execution instruction and a second oil injection execution instruction.

[0018] The combined action includes a first oil injection combined action and a second oil injection combined action.

[0019] According to the oil gun control instruction, controlling the oil gun unit in the hot standby state to perform a combined action includes the following specific steps:

[0020] When the oil gun control instruction is the first oil injection execution instruction, controlling the first oil gun group and the second oil gun group in the hot standby state to perform the first oil injection combined action.

[0021] When the oil gun control instruction is the second oil injection execution instruction, controlling the first oil gun group and the second oil gun group in the hot standby state to perform the second oil injection combined action.

[0022] Further, generating an oil gun control instruction according to the unit load, the negative pressure matching result and the fire detection matching result includes the following specific steps:

[0023] When the unit load is greater than the preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range and does not exceed the second preset pressure threshold range, and the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, a first oil injection execution instruction is generated as the oil gun control instruction.

[0024] Further, according to the unit load, the negative pressure matching result and the fire detection matching result, an oil gun control instruction is generated, including the following specific steps:

[0025] When the unit load is greater than the preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range and exceeds the second preset pressure threshold range, and the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, a second oil injection execution instruction is generated as the oil gun control instruction.

[0026] Further, the flame intensity value includes a first flame intensity value and a second flame intensity value.

[0027] When at least one of the first flame intensity value and the second flame intensity value is lower than the preset flame intensity threshold, the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold.

[0028] Further, when the oil gun control instruction is the first oil injection execution instruction, the first oil gun group and the second oil gun group are controlled to perform actions, including the following specific steps:

[0029] When the oil gun control instruction is the first oil injection execution instruction, the first oil gun group in a hot standby state is controlled to perform an oil injection action.

[0030] After a preset delay time, the second oil gun group in a hot standby state is controlled to perform an oil injection action.

[0031] Further, when the oil gun control instruction is the second oil injection execution instruction, the first oil gun group and the second oil gun group are controlled to perform actions, including the following specific steps:

[0032] When the oil gun control instruction is the second oil injection execution instruction, the first oil gun group in a hot standby state is controlled to perform an oil injection action.

[0033] The second oil gun group in a hot standby state is controlled not to perform an oil injection action.

[0034] The application also provides an automatic oil injection device, including:

[0035] The monitoring module is used for monitoring the pressure and the flame intensity in the furnace in real time, and obtaining real-time furnace negative pressure values and flame intensity values.

[0036] The matching module is used for matching the furnace negative pressure values with preset pressure threshold ranges, and obtaining negative pressure matching results; and is also used for matching the flame intensity values with preset flame intensity thresholds, and obtaining fire detection matching results.

[0037] The control module is used for generating an oil gun control instruction according to the unit load, the negative pressure matching results and the fire detection matching results; and is also used for controlling the oil gun unit in the hot standby state to perform an action according to the oil gun control instruction.

[0038] Further, the preset pressure threshold range comprises a first preset pressure threshold range and a second preset pressure threshold range.

[0039] The first preset pressure threshold range is composed of a first preset positive boundary value and a first preset negative boundary value.

[0040] The second preset pressure threshold range is composed of a second preset positive boundary value and a second preset negative boundary value.

[0041] The second preset positive boundary value is greater than the first preset positive boundary value, and the second preset negative boundary value is less than the first preset negative boundary value.

[0042] The technical scheme provided by the present application has at least the following beneficial effects:

[0043] By acquiring the pressure and the flame intensity in the furnace and combining the unit load, the coking and fire extinguishing trend can be timely controlled, the preparation time of the oil gun unit for oil injection operation can be effectively shortened, the timeliness of the oil injection operation is improved, and the occurrence of the coking and fire extinguishing event in the thermal power generation can be maximally avoided. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 A flowchart of an automatic oil injection method provided by the present application;

[0045] Figure 2 An application scenario schematic diagram of a fire detection probe provided by the present application. DETAILED DESCRIPTION

[0046] In order to deepen the understanding of the present application, the present application will be further described in detail below in combination with the drawings and embodiments, which are only used to explain the present application and do not limit the protection scope of the present application.

[0047] Please refer to Figure 1 and Figure 2The application provides an automatic oil injection method, which comprises the following specific steps.

[0048] S100: Real-time monitoring of the pressure and flame intensity in the boiler furnace to obtain real-time furnace negative pressure values and flame intensity values.

[0049] In this embodiment, the pressure in the boiler furnace can be understood as the furnace negative pressure, and the real-time pressure value, i.e., the furnace negative pressure value, can be obtained by using conventional monitoring means. When monitoring the flame intensity, the flame intensity can be monitored by adding a fire detection probe, the fire detection probe transmits a fire detection signal to a fire detection cabinet, the fire detection cabinet can obtain the corresponding flame intensity value after filtering and other preliminary processing of the fire detection signal, and the flame intensity value is transmitted to an engineer station, the engineer station can realize the function logic through DCS to realize the automatic control of the oil injection treatment of the oil gun. The flame intensity value here can be understood as an on-off quantity representing the presence or absence of fire, which can be represented by 1 for the presence of fire and 0 for the absence of fire. The flame intensity value here can also be understood as an amplitude value representing the flame intensity, which can be represented in the form of percentage data. In a specific embodiment, it is assumed that the boiler furnace is divided into six layers, A, B, C, D, E and F, which are sequentially arranged, and there are two side walls and four corner wing walls in the front wall and the rear wall. The A layer is the lowermost boiler 7.3 meter layer, and the boiler collapse mainly occurs in the two side walls and the wing walls. To monitor the flame intensity, new fire detection probe installation positions can be added to the boiler 7.3 meter layer of the two side walls, the installation positions are determined, and the pipe opening is made on the water-cooled wall according to the size of the fire detection probe protection pipe after the pipe opening. The protection pipe is made of Ф80 stainless steel pipe, the protection pipe of the fire detection probe is horizontally welded on the heat dissipation fin after the pipe opening of the water-cooled wall, and the new fire detection probe is installed in the protection pipe for transmitting the fire detection signal. The line for transmitting the fire detection signal is led to the fire detection cabinet, and the fire detection signal can be filtered and amplified by the fire detection processing card in the fire detection cabinet to obtain the corresponding flame intensity value.

[0050] S200: Matching the furnace negative pressure value with a preset pressure threshold range to obtain a negative pressure matching result.

[0051] In this embodiment, the preset pressure threshold range is determined according to the furnace negative pressure analysis during the previous boiler collapse. The preset pressure threshold range can be determined according to the amplitude of the furnace negative pressure change recorded before each boiler collapse, such as the amount of increase or decrease compared with the previous steady-state negative pressure. In a specific implementation, the matching action can be realized by the H / L function block in the DCS. It is assumed that the preset pressure threshold range set by the H / L function block is ±220 Pa, and when the furnace negative pressure value is greater than +220 Pa or less than -220 Pa, the H / L function block outputs a high level 1 as the negative pressure matching result, which indicates that the furnace negative pressure value has exceeded the furnace negative pressure when the collapse is likely to occur, i.e., the collapse is likely to occur.

[0052] Further, the preset pressure threshold range comprises a first preset pressure threshold range and a second preset pressure threshold range.

[0053] The first preset pressure threshold range is composed of a first preset positive boundary value and a first preset negative boundary value.

[0054] The second preset pressure threshold range is composed of a second preset positive boundary value and a second preset negative boundary value.

[0055] The second preset positive boundary value is greater than the first preset positive boundary value, and the second preset negative boundary value is less than the first preset negative boundary value.

[0056] In the embodiment, the preset pressure threshold range is composed of two parts, so as to realize different oil injection controls through different ranges. In specific implementation, the first preset positive boundary value can be +220 Pa, the first preset negative boundary value can be -220 Pa, the second preset positive boundary value can be +500 Pa, and the second preset negative boundary value can be -500 Pa. In different application scenarios, the first preset pressure threshold range and the second preset pressure threshold range can be adjusted according to actual conditions.

[0057] S300: Matching the flame intensity value with a preset flame intensity threshold to obtain a fire detection matching result.

[0058] In the embodiment, the preset flame intensity threshold is used as reference data for judging whether the flame is extinguished or has an extinguishing trend. The preset flame intensity threshold can be represented by level values 0 and 1, or represented by a percentage number. The specific form can be selected according to actual implementation needs. In a specific implementation, both the flame intensity value and the preset flame intensity threshold are in the form of percentage data. Assuming that the preset flame intensity threshold is 20%, when the flame intensity value is 10%, the flame intensity value is less than the preset flame intensity threshold, which can be used as one of the triggering conditions of the oil injection action for subsequent processing.

[0059] S400: Generating an oil gun control instruction according to the unit load, the negative pressure matching result and the fire detection matching result.

[0060] In the embodiment, the unit load is used to represent the load condition of the generator unit, and the oil gun control instruction is used to control whether the corresponding oil gun performs the oil injection action. The oil gun control instruction is determined by the unit load, the negative pressure matching result and the fire detection matching result.

[0061] S500: Controlling the oil gun unit in the hot standby state to perform a combined action according to the oil gun control instruction.

[0062] In this embodiment, the oil gun unit is composed of multiple oil guns. The oil gun unit in the hot standby state can be long into the furnace for hot standby during the operation of the boiler with the cooling wind turned on. The oil gun can immediately perform the oil injection action by directly opening the hot standby oil gun oil angle valve when the oil gun is put into operation. According to the oil gun control instruction, the combined action of the oil gun unit can be to perform different control on the corresponding oil gun, or to perform the same control. The specific setting can be made according to the actual situation. It should be pointed out that when the industrial television leading to the 7.3 meter layer of the boiler is introduced to the control large screen, and the 0 meter slag conveyor area monitoring is introduced to the control large screen, it is convenient for the operator to inject oil and stabilize combustion in time according to the change of the 7.3 meter industrial television and the water splashing of the slag conveyor hull during the collapse of the coke. The judgment standard for the manual oil injection of the operator is: when the 7.3 meter industrial television becomes dark or the slag conveyor hull splashes water, immediately open the hot standby oil gun oil angle valve. Whether the collapse of the coke causes the fire to be extinguished or not, before the collapse of the coke in the boiler each time, the furnace pressure will change to a certain extent before the industrial television becomes dark and the slag conveyor hull splashes water, such as a certain amount of increase or decrease compared with the previous steady-state negative pressure. Compared with the change of the furnace pressure, the manual oil injection operation of the operator has obvious hysteresis, and the hysteresis time is about 5-10 seconds. When the oil is injected manually, the dropped coke has already fallen into the cold ash hopper area or even into the hull and generated a large amount of water gas, so that the furnace pressure will have a certain amount of positive pressure after the manual operation of the operator each time. Therefore, from the time point of view, the automatic oil injection is more timely than the manual operation of the operator, which can effectively avoid the problem of delayed oil injection opportunity due to the operator's delay in finding out.

[0063] Further, the oil gun unit comprises a first oil gun group and a second oil gun group;

[0064] The oil gun control instruction comprises a first oil injection execution instruction and a second oil injection execution instruction;

[0065] The combined action comprises a first oil injection combined action and a second oil injection combined action;

[0066] According to the oil gun control instruction, the oil gun unit in the hot standby state performs the combined action, comprising the following specific steps:

[0067] When the oil gun control instruction is the first oil injection execution instruction, the first oil gun group and the second oil gun group in the hot standby state perform the first oil injection combined action;

[0068] When the oil gun control instruction is the second oil injection execution instruction, the first oil gun group and the second oil gun group in the hot standby state perform the second oil injection combined action.

[0069] In this embodiment, the first oil gun group and the second oil gun group are each composed of a plurality of oil guns, and the specific number can be determined according to actual needs. The first oil injection execution instruction and the second oil injection execution instruction can be respectively understood as a combination of oil injection control instructions for each oil gun. The first oil injection combined action and the second oil injection combined action can be respectively understood as a combination of execution actions of each oil gun. In a specific embodiment, it is assumed that the boiler furnace is divided into A, B, C, D, E, F and the like, which are sequentially set up 6 layers, and also includes two side walls of the front wall and the rear wall and four corner wing walls, and the A layer is the lowermost boiler 7.3 meter layer. The B layer is provided with B1 and B2 oil guns in a hot standby state on the rear wall, and B3 and B4 oil guns in a hot standby state on the front wall; the E layer is provided with E1 and E2 oil guns in a hot standby state on the rear wall, and E3 and E4 oil guns in a hot standby state on the front wall. The first oil gun group is composed of B1 and E3 oil guns, and the second oil gun group is composed of B4 and E2 oil guns. It should be pointed out that the conventional oil gun self-injection adopts a "program control" mode, that is, the oil gun is inserted - the ignition gun is inserted - the ignition gun is ignited - the oil angle valve is opened, and the whole process takes about 7-10 seconds. If the oil is injected by the "program control" mode after the furnace negative pressure changes before the collapse of the coke, the 7-10 second time coke has already fallen into the slag boat body, a large amount of water gas is generated, the local combustion of the boiler has been deteriorated, and there is a great risk of explosion. In view of this, the oil gun in the technical solution is modified, and in the case that the cooling wind is turned on, the oil gun can be inserted into the furnace for a long time in operation in a hot standby state. When the oil gun is self-injected, the hot standby oil gun oil angle valve is directly opened, the "program control" action time is saved, the explosion in the furnace caused by oil injection in the case of deteriorated combustion is prevented, and the triggering of the fire extinguishing protection or even the fire extinguishing and shooting accidents is avoided.

[0070] Further, according to the unit load, the negative pressure matching result, and the fire detection matching result, an oil gun control instruction is generated, including the following specific steps:

[0071] When the unit load is greater than a preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range, the furnace negative pressure value does not exceed the second preset pressure threshold range, and the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, a first oil injection execution instruction is generated as the oil gun control instruction.

[0072] In the embodiment, the preset load threshold can be set as 30% of BMCR, BMCR can be understood as the maximum continuous evaporation capacity of the boiler, and the specific value of the preset load threshold can be adjusted according to actual needs. The first preset pressure threshold range can be ±220Pa, and the second preset pressure threshold range can be ±500Pa. When the unit load is greater than 30% of BMCR, the furnace negative pressure value exceeds ±220Pa but is within ±500Pa, and there is no fire when the 7.3m fire detection intensity on the front wall or the rear wall side is detected, the first oil injection execution instruction is generated. The first oil injection execution instruction can be set as the first oil gun group and the second oil gun group execute the oil injection action, assuming that the first oil gun group is composed of B1 and E3 oil guns, and the second oil gun group is composed of B4 and E2 oil guns, then B1, B4, E2, E3 oil guns execute the oil injection action. It should be noted that in the specific implementation, the judgment condition for generating the first oil injection execution instruction can also include the judgment of whether B1, B4, E2, E3 oil guns are in a hot standby state, so as to improve the reliability of oil injection control. After judging whether the oil gun is in a hot standby state, i.e., whether the oil gun is in an oil injection position, the judgment result can be input to DCS in the form of high and low levels, and each judgment condition is combined and judged by an And function block to prevent misoperation.

[0073] Further, according to the unit load, the negative pressure matching result, and the fire detection matching result, an oil gun control instruction is generated, including the following specific steps:

[0074] When the unit load is greater than the preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range, the furnace negative pressure value exceeds the second preset pressure threshold range, and the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, a second oil injection execution instruction is generated as an oil gun control instruction.

[0075] In the embodiment, the preset load threshold can be set as 30% of the BMCR (boiler maximum continuous rating), and the BMCR can be understood as the maximum continuous evaporation capacity of the boiler. The specific value of the preset load threshold can be adjusted according to actual needs. The first preset pressure threshold range can be ±220 Pa, and the second preset pressure threshold range can be ±500 Pa. When the unit load is greater than 30% of the BMCR, the furnace negative pressure value exceeds ±220 Pa and exceeds the range of ±500 Pa, and the fire detection intensity of the 7.3-meter layer of the front wall or the rear wall side is not detected, the second oil injection execution instruction is generated. The second oil injection execution instruction can be set as the first oil gun group executing the oil injection action, and the second oil gun group not executing the oil injection action. Assuming that the first oil gun group is composed of B1 and E3 oil guns, and the second oil gun group is composed of B4 and E2 oil guns, then B1 and E3 oil guns execute the oil injection action, and B4 and E2 oil guns do not execute the oil injection action. It should be noted that in the specific implementation, the judgment condition for generating the second oil injection execution instruction can also include the judgment of whether the B1, B4, E2, and E3 oil guns are in a hot standby state, so as to improve the reliability of the oil injection control. After judging whether the oil gun is in a hot standby state, i.e., whether the oil gun is in an oil injection position, the judgment result can be input to the DCS in the form of high and low levels. Each judgment condition is combined and judged through a function block to prevent misoperation.

[0076] Further, the flame intensity value includes a first flame intensity value and a second flame intensity value.

[0077] When at least one of the first flame intensity value and the second flame intensity value is lower than the preset flame intensity threshold, the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold.

[0078] In the embodiment, the first flame intensity value and the second flame intensity value are obtained based on signals detected by the newly added fire detection probes of the 7.3-meter layer of the two side walls of the boiler. Assuming that the first flame intensity value corresponds to the flame intensity condition of the front wall side, and the second flame intensity value corresponds to the flame intensity condition of the rear wall side, the preset flame intensity threshold is used as a reference value for whether the flame is extinguished. When the flame intensity value is lower than the preset flame intensity threshold, it indicates that there is a coking extinction event. Therefore, when the flame of any side of the front wall or the rear wall is extinguished, it is judged that there is a coking extinction event.

[0079] Further, when the oil gun control instruction is the first oil injection execution instruction, the first oil gun group and the second oil gun group are controlled to execute actions, including the following specific steps:

[0080] When the oil gun control instruction is the first oil injection execution instruction, the first oil gun group in the hot standby state is controlled to execute the oil injection action.

[0081] After a preset delay time, the second oil gun group in the hot standby state is controlled to execute the oil injection action.

[0082] In the embodiment, the time delay action can be realized by a time delay module in the DCS, and the preset time delay time can be set as 2 seconds, or can be adjusted to other values according to actual needs. In a specific implementation, it is assumed that the first oil gun group is composed of B1 and E3 oil guns, the second oil gun group is composed of B4 and E2 oil guns, and the B1, B4, E2 and E3 oil guns are in a hot standby state. The operator can see on the DCS that the oil guns have been advanced to the position. When the received oil gun control instruction is a first oil injection execution instruction, the oil angle valves of the B1 and E3 oil guns are opened to control the B1 and E3 oil guns to execute the oil injection action, and the oil angle valves of the B4 and E2 oil guns are locked. After a time delay of 2 seconds, the oil angle valves of the B4 and E2 oil guns are opened to control the B4 and E2 oil guns to execute the oil injection action.

[0083] Further, when the oil gun control instruction is a second oil injection execution instruction, the first oil gun group and the second oil gun group are controlled to execute actions, including the following specific steps:

[0084] When the oil gun control instruction is the second oil injection execution instruction, the first oil gun group in the hot standby state is controlled to execute the oil injection action.

[0085] The second oil gun group in the hot standby state is controlled not to execute the oil injection action.

[0086] In the embodiment, it is assumed that the first oil gun group is composed of B1 and E3 oil guns, the second oil gun group is composed of B4 and E2 oil guns, and the B1, B4, E2 and E3 oil guns are in a hot standby state. The operator can see on the DCS that the oil guns have been advanced to the position. When the received oil gun control instruction is a second oil injection execution instruction, the oil angle valves of the B1 and E3 oil guns are opened to control the B1 and E3 oil guns to execute the oil injection action, and the oil angle valves of the B4 and E2 oil guns are locked. It should be noted that before the specific implementation, it is necessary to confirm whether the oil angle valves of the B1, B4, E2 and E3 oil guns are closed tightly and have internal leakage. At the same time, a hot engine maintenance can be performed according to a preset interval time, such as every 15 days, to check the hot standby oil guns one by one to check whether the atomizing pieces are blocked by carbon deposition, so as to ensure that the hot standby oil guns can be reliably standby.

[0087] The present application can effectively reduce the frequency of unit coking and flameout, reduce the loss of unit load and direct economic loss by real-time monitoring of the pressure and flame intensity in the boiler furnace, in combination with the unit load, and under the cooperation of the oil gun unit in the hot standby state. At the same time, the water-cooled wall pipe explosion and cracking accidents caused by uneven heating of the water-cooled wall of the boiler due to the boiler flameout can be reduced, and the indirect economic loss can be reduced.

[0088] The present application also provides an automatic oil injection device, comprising:

[0089] The monitoring module is used to monitor the pressure and flame intensity inside the boiler furnace in real time, and obtain the real-time furnace negative pressure value and flame intensity value;

[0090] The matching module is used to match the furnace negative pressure value with a preset pressure threshold range to obtain a negative pressure matching result; it is also used to match the flame intensity value with a preset flame intensity threshold to obtain a flame detection matching result.

[0091] The control module is used to generate oil gun control commands based on the unit load, the negative pressure matching result, and the flame detector matching result; it is also used to control the oil gun unit in hot standby state to perform actions based on the oil gun control commands.

[0092] Furthermore, in the automatic oil dispensing device, the preset pressure threshold range includes a first preset pressure threshold range and a second preset pressure threshold range;

[0093] The first preset pressure threshold range consists of a first preset positive boundary value and a first preset negative boundary value;

[0094] The second preset pressure threshold range consists of a second preset positive boundary value and a second preset negative boundary value;

[0095] The second preset positive boundary value is greater than the first preset positive boundary value, and the second preset negative boundary value is less than the first preset negative boundary value.

[0096] Furthermore, in the automatic oil dispensing device, the oil gun unit includes a first oil gun group and a second oil gun group;

[0097] The oil gun control commands include a first oil injection execution command and a second oil injection execution command;

[0098] The combined action includes a first oil-injection combined action and a second oil-injection combined action;

[0099] According to the oil gun control command, the oil gun unit in hot standby state is controlled to perform a combination of actions, including the following specific steps:

[0100] When the oil gun control command is the first oil injection execution command, the first oil gun group and the second oil gun group, which are in hot standby state, are controlled to perform the first oil injection combination action.

[0101] When the oil gun control command is the second oil injection execution command, the first oil gun group and the second oil gun group, which are in hot standby state, are controlled to perform the second oil injection combination action.

[0102] Furthermore, in the automatic oil injection device, oil gun control commands are generated based on the unit load, the negative pressure matching result, and the flame detector matching result, including the following specific steps:

[0103] When the unit load is greater than the preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range and does not exceed the second preset pressure threshold range, and the flame detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, a first oil injection execution instruction is generated as the oil gun control instruction.

[0104] Further, in the automatic oil injection device, the oil gun control instruction is generated according to the unit load, the negative pressure matching result and the flame detection matching result, including the following specific steps:

[0105] When the unit load is greater than the preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range and exceeds the second preset pressure threshold range, and the flame detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, a second oil injection execution instruction is generated as the oil gun control instruction.

[0106] Further, in the automatic oil injection device, the flame intensity value includes a first flame intensity value and a second flame intensity value.

[0107] When at least one of the first flame intensity value and the second flame intensity value is lower than the preset flame intensity threshold, the flame detection matching result is that the flame intensity value is lower than the preset flame intensity threshold.

[0108] Further, in the automatic oil injection device, when the oil gun control instruction is the first oil injection execution instruction, the first oil gun group and the second oil gun group are controlled to perform actions, including the following specific steps:

[0109] When the oil gun control instruction is the first oil injection execution instruction, the first oil gun group in the hot standby state is controlled to perform the oil injection action.

[0110] After a preset delay time, the second oil gun group in the hot standby state is controlled to perform the oil injection action.

[0111] Further, in the automatic oil injection device, when the oil gun control instruction is the second oil injection execution instruction, the first oil gun group and the second oil gun group are controlled to perform actions, including the following specific steps:

[0112] When the oil gun control instruction is the second oil injection execution instruction, the first oil gun group in the hot standby state is controlled to perform the oil injection action.

[0113] The second oil gun group in the hot standby state is controlled not to perform the oil injection action.

[0114] The above embodiments should not be taken as limiting the application in any way, and any technical solutions obtained by equivalent substitution or equivalent conversion shall fall within the protection scope of the application.

Claims

1. An automatic oil feeding method characterized by comprising: The method comprises the following specific steps: Real-time monitoring of the pressure and flame intensity in the boiler furnace to obtain real-time furnace negative pressure value and flame intensity value; Matching the furnace negative pressure value with a preset pressure threshold range to obtain a negative pressure matching result; Matching the flame intensity value with a preset flame intensity threshold to obtain a flame detection matching result; Generating an oil gun control instruction according to the unit load, the negative pressure matching result, and the flame detection matching result; Controlling the oil gun unit in a hot standby state to perform a combined action according to the oil gun control instruction; The preset pressure threshold range comprises a first preset pressure threshold range and a second preset pressure threshold range; The oil gun unit comprises a first oil gun group and a second oil gun group; The oil gun control instruction comprises a first oil injection execution instruction and a second oil injection execution instruction; The combined action comprises a first oil injection combined action and a second oil injection combined action; When the unit load is greater than a preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range, the furnace negative pressure value does not exceed the second preset pressure threshold range, and the flame detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, the first oil injection execution instruction is generated as the oil gun control instruction; When the unit load is greater than a preset load threshold, the negative pressure matching result is that the furnace negative pressure value exceeds the first preset pressure threshold range, the furnace negative pressure value exceeds the second preset pressure threshold range, and the flame detection matching result is that the flame intensity value is lower than the preset flame intensity threshold, the second oil injection execution instruction is generated as the oil gun control instruction; When the oil gun control instruction is the first oil injection execution instruction, the first oil gun group in a hot standby state is controlled to perform an oil injection action; After a preset delay time, the second oil gun group in a hot standby state is controlled to perform an oil injection action; When the oil gun control instruction is the second oil injection execution instruction, the first oil gun group in a hot standby state is controlled to perform an oil injection action; The second oil gun group in a hot standby state is not controlled to perform an oil injection action.

2. The method of automatically delivering oil of claim 1, wherein, The first preset pressure threshold range is composed of a first preset positive boundary value and a first preset negative boundary value; The second preset pressure threshold range is composed of a second preset positive boundary value and a second preset negative boundary value; The second preset positive boundary value is greater than the first preset positive boundary value, and the second preset negative boundary value is less than the first preset negative boundary value.

3. The method of claim 2, wherein the oil is automatically injected at a rate of 0.1 to 0.5 ml / min. Controlling the oil gun unit in a hot standby state to perform a combined action according to the oil gun control instruction comprises the following specific steps: When the oil gun control instruction is a first oil injection execution instruction, the first oil gun group and the second oil gun group in a hot standby state are controlled to perform a first oil injection combined action; When the oil gun control instruction is a second oil injection execution instruction, the first oil gun group and the second oil gun group in a hot standby state are controlled to perform a second oil injection combined action.

4. The method of claim 1, wherein, The flame intensity value comprises a first flame intensity value and a second flame intensity value; When at least one of the first flame intensity value and the second flame intensity value is lower than the preset flame intensity threshold value, the fire detection matching result is that the flame intensity value is lower than the preset flame intensity threshold value.

5. An automatic oil feeding device using the automatic oil feeding method according to any one of claims 1 to 4, characterized by Comprise: A monitoring module is configured to monitor the pressure and the flame intensity in the boiler furnace in real time to obtain a real-time furnace negative pressure value and a flame intensity value; A matching module is configured to match the furnace negative pressure value with a preset pressure threshold range to obtain a negative pressure matching result, and match the flame intensity value with a preset flame intensity threshold value to obtain a fire detection matching result; A control module is configured to generate an oil gun control instruction according to the unit load, the negative pressure matching result and the fire detection matching result; And configured to control the oil gun unit in the hot standby state to perform an action according to the oil gun control instruction.

6. The automatic oil feeder of claim 5, wherein The preset pressure threshold range comprises a first preset pressure threshold range and a second preset pressure threshold range; The first preset pressure threshold range is composed of a first preset positive boundary value and a first preset negative boundary value; The second preset pressure threshold range is composed of a second preset positive boundary value and a second preset negative boundary value; The second preset positive boundary value is greater than the first preset positive boundary value, and the second preset negative boundary value is less than the first preset negative boundary value.

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