CN114488857A

CN114488857A - Multi-working-medium direct blending combustion device and control system and control method thereof

Info

Publication number: CN114488857A
Application number: CN202111521802.3A
Authority: CN
Inventors: 李志勋; 赵曙; 何小军; 王宏亮; 李民民; 周献齐; 寇鑫; 吴振; 程铭; 刘丽宁; 汪林; 任钰; 华程; 向红艳; 黄鹏辉
Original assignee: Xian Aerospace Propulsion Testing Technique Institute
Current assignee: Xian Aerospace Propulsion Testing Technique Institute
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-05-13
Anticipated expiration: 2041-12-13
Also published as: CN114488857B

Abstract

The invention relates to a multi-quality direct blending combustion device, a control system and a control method thereof, and aims to solve the technical problem that the existing water vapor generator control system is not suitable for the multi-quality direct blending combustion device. The system comprises a main controller module, a multi-working-medium transfer control module, a softened water treatment control module, a sensor redundancy test module, an electromagnetic valve energy-saving protection module and a liquid level test module. The method comprises the following steps: 1. in the starting mode, timing control and a DC24V power supply are adopted to supply power to each electromagnetic valve; 2. judging whether the ignition is successful or not, and if so, switching to a working mode; if not, returning to the step 1; 3. in the working mode, logic control and a DC10V power supply are adopted to supply power to each electromagnetic valve; 4. judging whether a shutdown mode is started or not, and if so, switching to the shutdown mode; if not, returning to the step 3; 5. in the shutdown mode, timing control and a DC24V power supply are adopted to supply power to each solenoid valve until shutdown is finished.

Description

Multi-working-medium direct blending combustion device and control system and control method thereof

Technical Field

The invention relates to a steam generating device, in particular to a multi-working-medium direct blending combustion device and a control system and a control method thereof.

Background

In recent years, a rapid steam generation technology based on the rocket engine principle is applied to the rocket engine test field to meet the use requirement of high-temperature steam for the evacuation of a jet pump in the rocket engine high-altitude simulation test field, has the remarkable advantages of rapid steam generation, high temperature and high pressure, energy conservation, environmental protection, small occupied area, low cost and the like, and has become the focus of attention of multiple industries. The common steam generator in the rocket engine test field mostly adopts working media such as liquid oxygen, gas oxygen, alcohol, softened water and the like to mix and burn to generate water vapor, and because the process principle is complex, the measurement and control performance requirement is high, the safety protection requirement is high, the working time is limited, the reliability of multiple ignition starting is poor, the preparation period is long, the risks of low temperature, flammability, explosiveness and the like exist, and certain limiting conditions are brought to popularization and application.

Around the popularization and application of the rapid steam generation technology, a water vapor generator adopting a direct mixing combustion mode of alcohol, air and softened water working media is newly developed, and liquid oxygen and oxygen are replaced by air working media, so that the safety risks of low temperature, flammability, explosiveness and the like are avoided, a system workplace is changed from a special explosion-proof workshop into movable vehicle-mounted equipment, the system complexity and safety protection requirements are reduced, and the supply of a movable steam source is facilitated.

The control device is used as a core link of the multi-quality direct blending combustion device, the multi-quality is directly blended and combusted to generate water vapor through the control of a system key process, and whether an emergency shutdown process is executed or not is determined through the monitoring of system key parameters. Compared with a steam generator using liquid oxygen, alcohol and softened water as working media. Novel many direct mixing combustion device of working medium has great difference in the aspect such as working medium type, system principle, functional requirement, and current control technical condition has a great deal of bottleneck, need overcome following difficult problem to its customization:

(a) multiple reliable ignition start: for such multi-quality direct-mixing combustion device, ignition starting is a key process, and is also one of important influencing factors for restricting the reliability of the multi-quality direct-mixing combustion device. All working media enter the combustion chamber in a supersonic fluid mode according to a preset time sequence, and are ignited by the igniter, and the direct multi-working-medium mixing combustion device cannot reliably ignite due to the influence of factors such as the time sequence and method, the ignition energy of the igniter, the humidity of the combustion device, the process pipeline processing method and the like. For the novel multi-working-substance direct blending combustion device, air (with the oxygen content of 21%) is adopted to replace liquid oxygen and oxygen (with the oxygen content of 100%), the difficulty of ignition starting of the multi-working-substance direct blending combustion device is increased, the ignition control mode of the multi-working-substance direct blending combustion device needs to be optimized and improved, and multiple times of reliable starting are guaranteed;

(b) automatic adjustment of abnormal states: once the phenomenon of working medium supply abnormality occurs in the existing steam generator, the existing steam generator does not have the readjustment capability of abnormal working conditions, needs to stop working medium supply and ignition process urgently, interrupts steam source output, and brings great influence to related processes. How to carry out self-adaptive adjustment on the abnormal working medium supply state to ensure that the multi-working-medium direct blending combustion device continuously works under a variable working condition without carrying out emergency shutdown operation on the multi-working-medium direct blending combustion device, thereby improving the working adaptability of the multi-working-medium direct blending combustion device;

(c) long-range uninterrupted working medium stable supply: the existing steam generator usually supplies working media to other working medium storage tanks such as an alcohol storage tank and a liquid oxygen storage tank in a gas pressurization mode, and the storage tanks are difficult to supply the working media in the pressurization process, so that the single working time of the steam generator is limited and mainly depends on the storage amount of the working media and the gas pressurization capacity. In order to meet the stable supply requirement of long-range uninterrupted steam, working medium supply guarantee conditions need to be improved, and the problems of continuous working medium supply and automatic supply are solved;

(d) multi-mode automatic control switching: for the steam generator with the multi-working-medium direct mixed combustion mode, the duration of the ignition process and the emergency shutdown process does not exceed 10 seconds, but the requirement on the performance of a control device is high, the control timing precision is required to be better than 10ms, the voltage supplied by an electromagnetic valve is not lower than DC24V, and the reliable ignition starting and the normal shutdown of the steam generator are ensured. If the ignition time lasts more than tens of hours, the high-precision control mode has the risk of interrupting the overflow of the timer, and the out-of-control phenomenon occurs, and in addition, the temperature rise phenomenon caused by poor heat dissipation of the valve body occurs when the electromagnetic valve works for a long time under the rated voltage, and the risk of damaging the electromagnetic valve is increased.

(e) And (4) fault shutdown safety protection: if the key parameter test of the multi-quality direct blending combustion device is abnormal, an emergency shutdown control process needs to be entered, on one hand, the steam generator is protected from being damaged, and on the other hand, relevant systems and equipment are protected from being damaged.

Disclosure of Invention

The invention aims to solve the technical problem that the existing water vapor generator control system is not suitable for a multi-quality direct blending combustion device, and provides a multi-quality direct blending combustion device, a control system and a control method thereof.

The technical scheme provided by the invention is as follows:

a control system of a multi-working-medium direct blending combustion device is characterized in that: the system comprises a main controller module, a multi-working medium transfer control module, a softened water treatment control module, a sensor redundancy test module, an electromagnetic valve energy-saving protection module and a liquid level test module;

the multi-working-medium transfer control module comprises an alcohol transfer pump, an alcohol transfer valve, a diesel oil transfer pump and a diesel oil transfer valve; the alcohol transfer pump, the alcohol transfer valve, the diesel oil transfer pump and the diesel oil transfer valve are respectively in communication connection with the main controller module and are used for being opened or closed under the control of a control signal of the main controller module;

the softened water treatment control module comprises a tap water supply valve, a softened water treatment start-stop trigger, a softened water transfer pump and a softened water transfer valve; the tap water supply valve, the softened water treatment start-stop trigger, the softened water transfer pump and the softened water transfer valve are respectively in communication connection with the main controller module and are used for being opened or closed under the control of a control signal of the main controller module;

the sensor redundancy test module comprises two groups of pressure sensors and two groups of temperature sensors; the two groups of pressure sensors and the two groups of temperature sensors are respectively in communication connection with the main controller module and are used for respectively sending sensing signals to the main controller module;

the electromagnetic valve energy-saving protection module comprises two different direct-current power supplies, a double-power switching circuit and a solid-state relay driving circuit; the dual-power switching circuit is in communication connection with the main controller module and is used for switching a direct-current power supply communicated to the solid-state relay driving circuit under the control of a control signal of the main controller module; the solid relay driving circuit is used for driving each electromagnetic valve in the multi-working medium direct blending combustion device;

the liquid level testing module comprises an alcohol storage tank liquid level meter arranged in the alcohol storage tank, a softened water storage tank liquid level meter arranged in the softened water storage tank and an air compressor oil tank liquid level meter arranged in an air compressor oil tank; the alcohol storage tank liquid level meter, the softened water storage tank liquid level meter and the air compressor oil tank liquid level meter are respectively in communication connection with the main controller module and used for respectively sending sensing signals to the main controller module.

Further, the air compressor further comprises an air compressor control module;

the air compressor control module comprises a first start-stop trigger, an air compressor controller, an air supply valve, a softened water blowing supply valve and an alcohol blowing supply valve; the softened water blowing supply valve, the alcohol blowing supply valve and the air supply valve are used for being opened or closed under the control of the main controller module;

the first start-stop trigger is connected with one end of the air compressor controller and is used for being opened or closed under the control of a control signal sent by the main controller module so as to control the opening and closing of the air compressor controller; the other end of the air compressor controller is in communication connection with the main controller module and used for adjusting the power of the air compressor under the control of the main controller module.

Further comprises a variable frequency pump control module,

the variable frequency pump control module comprises an alcohol pump controller, a second start-stop trigger, an alcohol supply valve, a softened water pump controller, a third start-stop trigger and a softened water supply valve;

the second start-stop trigger, the alcohol supply valve, the third start-stop trigger and the softened water supply valve are respectively in communication connection with the main controller module and are opened or closed under the control of the main controller module;

the second start-stop trigger is connected with one end of the alcohol pump controller and used for controlling the start or the stop of the alcohol pump controller, and the third start-stop trigger is connected with one end of the softened water pump controller and used for controlling the start or the stop of the softened water pump controller;

the other end of the alcohol pump controller is connected with the main controller module and is used for adjusting the rotating speed of the alcohol pump under the control of the main controller module;

the other end of the softening water pump controller is connected with the main controller module and used for adjusting the rotating speed of the softening water pump under the control of the main controller module.

Furthermore, the system also comprises a redundant ignition control module, a one-key start-stop trigger control module and a control terminal;

the redundant ignition control module comprises two sets of ignition control assemblies, and each set of ignition control assembly is used for controlling the ignition of the spark plug under the control of the main controller module.

The one-key start-stop trigger control module is used for sending an equipment start signal or an equipment stop signal to the main controller module;

the control terminal is used for receiving and displaying the process parameters from the main controller module and is provided with an input assembly for sending process parameter instructions to the main controller module.

The invention provides a multi-working-medium direct blending combustion device which is characterized by comprising a control system of the multi-working-medium direct blending combustion device.

The invention also provides a control method of the multi-working-medium direct blending combustion device, which is applied to the control system of the multi-working-medium direct blending combustion device and is characterized by comprising a starting mode, a working mode and a shutdown mode, wherein the control method comprises the following steps:

s1, in the starting mode, the main controller module controls the electromagnetic valve energy-saving protection module to adopt timing control with the precision higher than 10ms and a DC24V power supply to supply power to each electromagnetic valve in the multi-quality direct blending combustion device;

s2, the main controller module judges whether the multi-working-medium direct blending combustion device successfully ignites or not according to the sensing signal of the sensor redundancy test module, and if the ignition is successful, the main controller module switches to a working mode; if the ignition is unsuccessful, returning to the step S1;

s3, in the working mode, the main controller module controls the electromagnetic valve energy-saving protection module to adopt logic control and a DC10V power supply to supply power to each electromagnetic valve in the multi-work-mass direct blending combustion device; the main controller module judges whether to use an alcohol transfer pump, a diesel oil transfer pump and a softened water transfer pump to transfer corresponding working media to the alcohol storage tank, the oil tank of the air compressor and the softened water storage tank according to the sensing signals output by the liquid level testing module and the sensing signals until the main controller module enters a shutdown mode;

s4, the main controller module judges whether to start the shutdown mode according to the sensing signal of the sensor redundancy test module, and if the shutdown mode needs to be started, the main controller module switches to the shutdown mode; if the shutdown process does not need to be started, returning to step S3;

and S5, in a shutdown mode, the main controller module controls the electromagnetic valve energy-saving protection module to supply power to each electromagnetic valve in the multi-quality direct blending combustion device by adopting timing control with the precision higher than 10ms and a DC24V power supply, and judges whether the shutdown process is finished or not according to the sensing signal of the sensor redundancy test module until the shutdown process is finished.

Further, the shutdown mode in step S5 includes a fail-off mode, which includes the following steps:

s5.1, the main controller module judges that a fault shutdown mode needs to be started according to a sensing signal of the sensor redundancy test module;

s5.2, the main controller module sends a fault shutdown early warning signal to the air compressor control module and the variable frequency pump control module;

s5.3, under the control of the main controller module, sequentially closing the alcohol supply valve, the softened water supply valve and the second start-stop trigger, closing and controlling the alcohol pump controller and the third start-stop trigger under the control of the second start-stop trigger, and closing the softened water pump controller under the control of the third start-stop trigger;

s5.4, the main controller module judges whether the step S5.3 is closed or not according to the sensing signal of the sensor redundancy test module, and if the step S5.3 is closed, the blowing process is started; if the closing is not finished, returning to the step S5.3;

s5.5, starting a blowing process until the blowing process is repeated more than twice; the blowing process comprises the following steps: the main controller module controls the opening of the alcohol blowing supply valve and blows off the alcohol supply pipeline for 20 seconds by air, the main controller module controls the closing of the alcohol blowing supply valve and pauses for 5 seconds, the main controller module controls the opening of the softened water blowing supply valve and blows off the softened water supply pipeline for 20 seconds by air, and the main controller module controls the closing of the softened water blowing supply valve and pauses for 5 seconds;

and S5.6, after blowing is finished, sequentially closing the air supply valve, closing the first start-stop trigger and closing the air compressor controller, the alcohol blowing supply valve and the softened water blowing supply valve under the control of the first start-stop trigger through the main controller module.

Further, the starting step of the start mode in step S1 is as follows:

s1.1, blowing stage: performing a blowing process until the blowing process is more than ten times; the blowing process comprises the following steps: the main controller module controls the opening of the alcohol blowing supply valve and blows off the alcohol supply pipeline for 20 seconds by air, the main controller module controls the closing of the alcohol blowing supply valve and pauses for 5 seconds, the main controller module controls the opening of the softened water blowing supply valve and blows off the softened water supply pipeline for 20 seconds by air, and the main controller module controls the closing of the softened water blowing supply valve and pauses for 5 seconds;

s1.2, after blowing is finished, sequentially and synchronously electrifying the two paths of spark plugs, opening an alcohol supply valve, opening an air supply valve and opening a softened water supply valve by a main controller module according to a control time sequence to carry out ignition operation;

s1.3, judging whether ignition is successful or not by the main controller module according to a sensing signal of the sensor redundancy test module; if the ignition is successful, ending; if the ignition is not successful, the fault shutdown mode is operated, and the step S1.1 is returned.

Further, the method also comprises a redundant test signal switching mode, and comprises the following steps:

a1, reading a sensing signal of the sensor redundancy test module by the main controller module, and judging whether the multi-quality direct blending combustion device is in a steady-state working condition; if the test signal is in the steady state working condition, entering a judgment program for judging whether to carry out a redundant test signal switching mode; if the multi-working-medium direct blending combustion device is not in the steady working condition, the main controller module continues to read the sensing signals of the sensor redundancy test module until the multi-working-medium direct blending combustion device is in the steady working condition;

a2, determination procedure of whether to switch the mode of the redundant test signal: the two paths of independent signal values output by the redundancy structure are X1 and X2, under a steady-state working condition, the test reference value is Sr, according to a sensing signal of the sensor redundancy test module, if | X1-Sr | is less than or equal to 0.1Sr, X1 is an effective parameter, and the main controller module carries out control decision according to X1; if the absolute value of X1-Sr is more than or equal to 0.1Sr and the absolute value of X2-Sr is less than or equal to 0.05Sr, and the state continuously exceeds 5 times, X2 is an effective parameter, and the main controller module carries out control decision according to X2; and if the | X1-Sr ≧ 0.1Sr and the | X2-Sr ≧ 0.05Sr, starting the fault shutdown mode.

Further, the method also comprises a multi-working-medium abnormal state automatic adjustment mode;

air supply pressure abnormal state regulation: after the main controller module analyzes that the air supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module, the main controller module sends a control signal to the air compressor controller to adjust the pressure of the air compressor, judges whether the air pressure is recovered to be normal or not through the main controller module, and if the air pressure is recovered to be normal, supplies and continues to work according to a rated working condition; if the air supply pressure is not normal, the main controller module judges whether the air supply pressure is normal after the adjusting time is more than 5 seconds, and if the air supply pressure is normal, the air supply pressure continues to work according to the rated working condition; if the air supply pressure is still in an abnormal low state, the main controller module sends control signals to the alcohol pump controller and the softened water pump controller, and reduces the rotating speed of the alcohol pump and the softened water pump, so that alcohol, softened water and air are supplied under a low working condition; if the air supply pressure is still in an abnormal high state, entering a fault shutdown mode;

alcohol supply pressure abnormal state regulation: after the main controller module analyzes that the alcohol supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module, the main controller module sends a control signal to the alcohol pump controller to adjust the rotating speed of the alcohol pump, judges whether the alcohol pressure is recovered to be normal or not through the main controller module, and supplies and continues to work according to the rated working condition if the alcohol pressure is recovered to be normal; if the alcohol supply pressure is not normal, the main controller module judges whether the alcohol supply pressure is normal after the adjusting time is more than 5 seconds, and if the alcohol supply pressure is normal, the main controller module continues to work according to a rated working condition; if the alcohol supply pressure is still in an abnormal low state, the main controller module sends control signals to the air compressor controller and the softened water pump controller to reduce the pressure of the air compressor and the rotating speed of the softened water pump so that alcohol, softened water and air are supplied under a low working condition; if the alcohol supply pressure is still in an abnormal higher state, entering a fault shutdown mode;

softened water supply pressure abnormal state regulation: after the main controller module tests that the supply pressure of the softened water is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module, the main controller module sends a control signal to the softened water pump controller to adjust the rotating speed of the softened water pump, judges whether the pressure of the softened water is recovered to be normal or not through the main controller module, and if the pressure of the softened water is recovered to be normal, the softened water is supplied to continue working according to a rated working condition; if the softened water supply pressure is not normal, the main controller module judges whether the softened water supply pressure is normal after the adjusting time is more than 5 seconds, and if the softened water supply pressure is normal, the main controller module continues to work according to a rated working condition; if the supply pressure of the softened water is still in an abnormal low state, the main control module sends control signals to the air compressor controller and the alcohol pump controller to reduce the pressure of the air compressor and the rotating speed of the alcohol pump, so that alcohol, softened water and air are supplied under a low working condition; if the supply pressure of the softened water is still in an abnormal high state, entering a fault shutdown mode.

The invention has the beneficial effects that:

1. the sensor redundancy test module provided by the invention realizes the redundancy error correction function of the signal value of each sensor by arranging double redundancy sensors for the pressure and the temperature in the combustion chamber of the multi-working-medium direct blending combustion device, the pressure and the temperature of water vapor at the outlet and the pressure at each working medium inlet.

2. The control method has the functions of self-recognition, self-analysis, self-protection and the like, can quickly generate water vapor with the temperature of 180 ℃ and the pressure of 1.2MPa within a few seconds by automatically controlling the supply, mixing and combustion processes of working media such as air, alcohol, softened water and the like, and can respectively supply the working media to the alcohol storage tank, the softened water storage tank and the oil tank of the air compressor by receiving a sensing signal of the liquid level testing module through the main controller module, thereby solving the problem of continuous supply of alcohol, softened water and air and providing conditions for long-range uninterrupted operation of the multi-quality direct mixing and combustion device.

3. According to the invention, different control voltages are output to the electromagnetic valves for controlling the multi-working-medium direct blending combustion device in different modes of a starting mode, a working mode and a shutdown mode, so that each electromagnetic valve can be reliably opened or closed in the starting mode or the shutdown mode, and in the working mode, each electromagnetic valve is controlled by adopting a logic control mode and a low-voltage mode (a DC10V power supply), so that the phenomenon that the performance of the electromagnetic valve is reduced due to the fact that the temperature of the electromagnetic valve is continuously increased due to limited heat dissipation capacity in the long-time and high-voltage working modes is avoided, and the working reliability of the electromagnetic valve in different modes is improved.

4. The invention solves the problem of multiple reliable ignition of three supersonic speed fluids of air, alcohol and softened water in the mixing process of the combustion device under the closed and humid conditions by optimizing the ignition starting process flow of the combustion device, and improves the reliability of the starting process of the steam generator.

5. According to the invention, the working medium supply abnormal state is adaptively adjusted, so that the multi-working-medium direct mixing combustion device continuously works under variable working conditions, otherwise, the fault shutdown safety protection is implemented, and the safety of the steam generator system is improved.

Drawings

FIG. 1 is a schematic diagram of a control system for a multi-working-medium direct-blending combustion device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the communication connection of the control system of the multi-working-medium direct-blending combustion device according to the embodiment of the present invention;

FIG. 3 is a diagram of a communication connection of a host controller module according to an embodiment of the present invention;

FIG. 4 is a multi-mode switching flowchart of a control method for a multi-working-medium direct-blending combustion device according to an embodiment of the present invention;

FIG. 5 is a schematic view illustrating a shutdown mode of a control method for a multi-working-medium direct-blending combustion apparatus according to an embodiment of the present invention;

FIG. 6 is a schematic diagram illustrating a start-up mode of a control method for a multi-working-medium direct-blending combustion apparatus according to an embodiment of the present invention;

FIG. 7 is a schematic diagram illustrating a switching mode of redundant test signals in a control method for a multi-working-medium direct-blending combustion apparatus according to an embodiment of the present invention;

FIG. 8 is a schematic view illustrating an air supply pressure abnormal mode adjustment process of a control method for a multi-working-medium direct-blending combustion apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic diagram illustrating an alcohol supply pressure abnormal mode adjustment process of the control method for a multi-working-medium direct-blending combustion device according to the embodiment of the present invention;

FIG. 10 is a flow chart of the adjustment of the softened water supply pressure abnormality mode of the control method of the multi-working-medium direct blending combustion device according to the embodiment of the invention.

The reference numbers are as follows:

1-a main controller module, 101-a core processor, 102-a digital input module, 103-an analog input module, 104-a digital output module, 105-a communication switching module and 106-an analog signal conditioning module; 2-air compressor control module, 21-air compressor controller, 22-first start/stop trigger, 23-air supply valve, 24-alcohol blowing supply valve, 25-softened water blowing supply valve; 3-a variable frequency pump control module, 31-an alcohol pump controller, 32-a second start-stop trigger, 33-an alcohol supply valve, 34-a softened water pump controller, 35-a third start-stop trigger and 36-a softened water supply valve; 4-a multi-working medium transfer control module, 41-an alcohol transfer pump, 42-an alcohol transfer valve, 43-a diesel oil transfer pump and 44-a diesel oil transfer valve; 5-softened water treatment control module, 51-tap water supply valve, 52-softened water treatment start-stop trigger, 53-softened water transfer pump and 54-softened water transfer valve; 6-a sensor redundancy test module, 61-two groups of pressure sensors and 62-two groups of temperature sensors; 7-solenoid valve energy-saving protection module, 71-double power supply switching circuit, 72-solid state relay drive circuit, 73-DC24V power supply, 74-DC10V power supply, 8-redundant ignition control module, 81-high voltage package, 82-transfer cable, 83-spark plug, 84-control relay; 9-one-key start-stop trigger control module, 91-button switch, 92-shake elimination trigger circuit and 93-state machine circuit; 10-a control terminal, 1001-an integrated touch screen, 1002-process flow display software and 1003-an audible and visual alarm; 11-a liquid level testing module, 111-an alcohol storage tank liquid level meter, 112-a softened water storage tank liquid level meter and 113-an air compressor oil tank liquid level meter.

Detailed Description

In the embodiment, the key parameters are the pressure and the temperature in a combustion chamber of the multi-working-medium direct blending combustion device, the pressure and the temperature of water vapor at an outlet and the pressure at an inlet of alcohol, air and softened water; the control time sequence is a starting stage automatic control time sequence, a working stage automatic control time sequence and a shutdown stage automatic control time sequence which are set in the control system before the start of work.

Referring to fig. 1 to fig. 3, the present embodiment provides a control system for a multi-quality direct blending combustion device, which includes a main controller module 1, an air compressor control module 2, a variable frequency pump control module 3, a multi-quality transfer control module 4, a softened water treatment control module 5, a sensor redundancy test module 6, an electromagnetic valve energy-saving protection module 7, a redundancy ignition control module 8, a one-key start-stop trigger control module 9, a control terminal 10, and a liquid level test module 11;

the main controller 1 comprises a core processor 101, a digital input module 102, an analog input module 103, a digital output module 104, a communication switching module 105 and an analog signal conditioning module 106; the analog signal conditioning module 106 is configured to receive the sensing signals of the liquid level testing module 11 and the sensor redundancy testing module 6 and transmit the sensing signals to the core processor 101 through the analog input module 103; the communication switching module 105 is used for being in interactive communication connection with the air compressor control module 2 and the variable frequency pump control module 3 through Modbus communication so as to realize a working condition adjusting function of the air compressor, the alcohol pump and the softened water pump; the digital quantity input module 102 is used for receiving a start-stop signal of the one-key start-stop trigger control module 9 and controlling the start and the stop of the device; the digital output module 104 is used for converting the control instruction signal sent by the core processor 101 into a standard I/O output signal, so as to realize process control on the air compressor control module 2, the variable frequency pump control module 3, the multi-working medium transfer control module 4, the softened water treatment control module 5, the electromagnetic valve energy-saving protection module 7, the redundant ignition control module 8 and the one-key start-stop trigger control module 9.

The air compressor control module 2 comprises a first start-stop trigger 22, an air compressor controller 21, an air supply valve 23, a softened water blow-off supply valve 25 and an alcohol blow-off supply valve 24; the softened water blow-off supply valve 25, the alcohol blow-off supply valve 24 and the air supply valve 23 are adapted to receive an output signal of the digital quantity output module 104 of the main controller module 1 and are opened or closed under the control of the output signal.

The first start-stop trigger 22 is connected with one end of the air compressor controller 21 and is used for being opened or closed under the control of a control signal sent by the main controller module 1 so as to control the opening and closing of the air compressor controller 21; the other end of the air compressor controller 21 is connected to the communication switching module 105 in the main controller module 1, and is used for adjusting the power of the air compressor under the control of the signal output by the communication switching module 105.

The variable frequency pump control module 3 comprises an alcohol pump controller 31, a second start-stop trigger 32, an alcohol supply valve 33, a softened water pump controller 34, a third start-stop trigger 35 and a softened water supply valve 36; the second start-stop trigger 32, the alcohol supply valve 33, the third start-stop trigger 35 and the softened water supply valve 36 are respectively in communication connection with the digital output module 104 in the main controller module 1 and are controlled to be opened or closed by a signal output by the digital output module 104.

The second start-stop trigger 32 is connected with one end of the alcohol pump controller 31 for controlling the start or the stop of the alcohol pump controller 31, and the third start-stop trigger 35 is connected with one end of the softened water pump controller 34 for controlling the start or the stop of the softened water pump controller 34; the other end of the alcohol pump controller 31 is connected with the communication switching module 105 in the main controller module 1 and is used for adjusting the rotating speed of the alcohol pump under the control of a signal output by the communication switching module 105; the other end of the softened water pump controller 34 is connected with the communication switching module 105 in the main controller module 1, and is used for adjusting the rotation speed of the softened water pump under the control of a signal output by the communication switching module 105.

The multi-working medium transferring module 4 comprises an alcohol transferring pump 41, an alcohol transferring valve 42, a diesel oil transferring pump 43 and a diesel oil transferring valve 44; the alcohol transfer pump 41, the alcohol transfer valve 42, the diesel oil transfer pump 43 and the diesel oil transfer valve 44 are respectively in communication connection with the digital quantity output module 104 in the main controller module 1 and are used for being opened or closed under the control of an output signal of the digital quantity output module 104;

the softened water treatment control module 5 comprises a tap water supply valve 51, a softened water treatment start-stop trigger 52, a softened water transfer pump 53 and a softened water transfer valve 54; the tap water supply valve 51, the softened water treatment start-stop trigger 52, the softened water transfer pump 53 and the softened water transfer valve 54 are respectively in communication connection with the digital quantity output module 104 in the main controller module 1 and are used for being opened or closed under the control of an output signal of the digital quantity output module 104.

The first start-stop trigger 22, the second start-stop trigger 32, the third start-stop trigger 35 and the softened water treatment start-stop trigger 52 are controlled in a DC24V high-level single-pulse mode, and the period is not less than 100 ms. The air supply valve 23, alcohol supply valve 33, softened water supply valve 36, alcohol transfer valve 42, diesel oil transfer valve 44, tap water supply valve 51, and softened water transfer valve 54 are all direct current solenoid valves, and their operating voltage requirements are DC24 ± 3V, and the minimum voltage for conduction is DC 8V.

The sensor redundancy test module 6 comprises two groups of pressure sensors 61 and two groups of temperature sensors 62; the two groups of pressure sensors 61 and the two groups of temperature sensors 62 are respectively in communication connection with the analog quantity signal conditioner 106 in the main controller module 1 and are respectively used for sending two groups of pressure and two groups of temperature sensing signals to the analog quantity signal conditioner 106, the sensing signals are uniformly converted into DC 1-5V voltage signals after passing through the analog quantity signal conditioner 106 and then sequentially enter the analog quantity input module 103 and the core processor 101 to complete the test of key system parameters, wherein the two groups of pressure sensors 61 and the two groups of temperature sensors 62 both adopt a dual redundancy and recording test mode, the reliability of the test process is ensured, and accurate and reliable test data are provided for fault state identification and abnormal state adjustment.

The electromagnetic valve energy-saving protection module 7 comprises two different direct-current power supplies, a double-power switching circuit 71 and a solid-state relay drive circuit 72; the dual power supply switching circuit 71 is in communication connection with the digital quantity output module 104 in the main controller module 1, and is used for switching a direct-current power supply communicated to the solid-state relay driving circuit 72 under the control of an output signal of the digital quantity output module 104; the solid state relay driving circuit 72 is used for driving each electromagnetic valve in the multi-working medium direct blending combustion device; the two different DC power supplies are DC24V power supply 73 and DC10V power supply 74, respectively. The electromagnetic valve energy-saving protection module 7 can carry out high-voltage and low-voltage switching control on the electromagnetic valve, and the switching time of the two pressure states is less than 10 ms; the high voltage is DC24V, and the power supply control is carried out on the opening or closing action process of the electromagnetic valve; the low voltage is DC10V, and the stable conduction process after the solenoid valve is opened is maintained and controlled, so that the heating value of the solenoid valve in a long-time power-on state is reduced, and the temperature is prevented from increasing continuously.

The redundant ignition control module 8 comprises two groups of ignition control assemblies, each group of ignition control assemblies is used for controlling ignition of a spark plug under the control of an output signal of a digital output module 104 in the main controller module 1, and each ignition control assembly comprises a control relay 84 connected with the main controller module 1, and a high-voltage pack 81, a transfer cable 82 and the spark plug 83 which are sequentially arranged. Two spark plugs 83 are adopted to carry out synchronous ignition control on the combustion process, so that the ignition energy and reliability are enhanced, and the single-point failure risk of a single spark plug is avoided.

The one-key start-stop trigger control module 9 includes a button switch 91, a jitter elimination trigger circuit 92 and a state machine circuit 93, after the button switch 91 is continuously pressed for more than 10 seconds, a stable "ignition start" or "stop-off" signal can be output through the jitter elimination trigger circuit 92 and the state machine circuit 93, and the one-key start-stop trigger control module 9 is used for sending an equipment start signal or an equipment stop signal to the main controller module 1. Specifically, after the core processor 101 receives the "ignition start" signal through the digital input module 102, the core processor 101 sends a signal to the digital output module 104 to start executing the ignition control sequence, and outputs a high-level DC24V signal to the button switch 91 to turn on the button indicator, which indicates that the button indicator is in the ignition control state, and when the "stop power" signal is valid, the core processor 101 executes the power-off process, and the indicator of the button switch 91 turns on or off.

The control terminal 10 comprises an integrated touch screen 1001, process flow display software 1002 and an audible and visual alarm 1003, wherein process parameter signals output by a core processor 101 in the main controller module 1 are displayed on the integrated touch screen 1001 by the process flow display software 1002, and the control terminal 10 is provided with an input assembly for sending process parameter instructions to the core processor 101; the process flow display software 1002 carries out comprehensive decision by adopting a mode of combining key parameters and control time sequence states, and can execute animation processes such as pipeline dynamic filling, working medium atomization and blending, ignition simulation, steam generation and the like when both meet the conditions; the audible and visual alarm 1003 is used for sending out an alarm signal when the combustion device fails.

The liquid level test module 11 comprises an alcohol storage tank liquid level meter 111 arranged in the alcohol storage tank, a softened water storage tank liquid level meter 112 arranged in the softened water storage tank and an air compressor oil tank liquid level meter 113 arranged in an air compressor oil tank; the alcohol storage tank liquid level meter 111, the softened water storage tank liquid level meter 112 and the air compressor oil tank liquid level meter 113 are respectively in communication connection with the analog quantity signal conditioner 106 in the main controller module 1 and used for respectively sending sensing signals to the analog quantity signal conditioner 106, the sensing signals are processed by the analog quantity input module 103 and then output to the core processor 101, and after being analyzed by the core processor 101, the digital quantity output module 104 sends control signals to the multi-work quality transfer module 4 and the softened water processing control module 5.

The main controller module 1 sets up upper and lower limit alarm ranges for the alcohol storage tank liquid level meter 63, the softened water storage tank liquid level meter 64 and the air compressor oil tank liquid level meter 65, and carries out automatic decision-making for the working medium transfer process, when the lower limit alarm range is reached, the alcohol transfer pump 41, the diesel transfer pump 43 and the softened water transfer pump 53 transfer alcohol, diesel and softened water to the alcohol storage tank, the air compressor oil tank and the softened water storage tank respectively, so as to ensure stable supply of long-range uninterrupted working medium, and the alcohol transfer pump 41, the diesel transfer pump 43 and the softened water transfer pump 53 all adopt a DC24V power supply mode.

The embodiment provides a set of integrated, multifunctional, reliable and intelligent multi-quality direct blending combustion device control system, and the system has the functions of local and remote human-computer interaction, real-time state monitoring, automatic decision control, automatic safety protection and the like, and simplifies the complexity of use and maintenance.

The embodiment provides a multi-working-medium direct blending combustion device which comprises a control system of the multi-working-medium direct blending combustion device.

The control process of the control system based on the multi-working-medium direct-mixing combustion device comprises a starting mode, a working mode and a shutdown mode, and referring to fig. 4, the control method comprises the following steps:

s1, starting a mode;

according to the control sequence, in the starting mode, the main controller module 1 controls the electromagnetic valve energy-saving protection module 7 to supply power to each electromagnetic valve in the multi-quality direct blending combustion device by adopting timing control with the precision higher than 10ms and a DC24V power supply 73;

referring to fig. 6, the starting process of the start mode specifically includes:

s1.1, blowing stage: performing a blowing process until the blowing process exceeds ten times; the blowing process comprises the following steps: the main controller module 1 controls the alcohol blowing supply valve 24 to be opened, the alcohol supply pipeline is blown by air for 20 seconds, the main controller module 1 controls the alcohol blowing supply valve 24 to be closed, the intermittence is 5 seconds, the main controller module 1 controls the softened water blowing supply valve 25 to be opened, the softened water supply pipeline is blown by air for 20 seconds, and the main controller module 1 controls the softened water blowing supply valve 25 to be closed, and the intermittence is 5 seconds; this process improves the humidity conditions inside the combustion device, ensuring its reliable ignition.

S1.2, after blowing is finished, the main controller module 1 synchronously powers the two paths of spark plugs at 0 second, opens the alcohol supply valve 33 at t1 seconds, opens the air supply valve 23 at t2 seconds and opens the softened water supply valve 36 at t3 seconds in sequence according to a control sequence to carry out ignition operation, wherein t3 is more than t2 is more than t 1.

S1.3, judging whether ignition is successful or not by the main controller module 1 according to a sensing signal of the sensor redundancy test module 6; if the ignition is successful, switching to a working mode; if the ignition is not successful, the fault shutdown mode is operated, and the step S1.1 is returned.

S2, working mode;

in the working mode, the main controller module 1 controls the electromagnetic valve energy-saving protection module 7 to supply power to each electromagnetic valve in the multi-quality direct blending combustion device by adopting logic control and a DC10V power supply 74; under the long-range mode of operation, alcohol and demineralized water adopt alcohol inverter pump and demineralized water inverter pump supply, the air adopts the air compressor mode to supply, analog signal conditioner 106 in the main control unit module 1 receives the sensing signal parameter of alcohol storage tank level gauge 111, demineralized water storage tank level gauge 112 and air compressor oil tank level gauge 113 in real time, after the analysis and processing of core processor 101, according to the upper and lower limit setting parameter of liquid level, confirm whether to carry out the commentaries on classics and annotate, guarantee the steady supply of incessant working medium under the long-range work.

S3, the main controller module 1 judges whether to start the shutdown mode according to the sensing signal of the sensor redundancy test module 6, and if the shutdown mode needs to be started, the main controller module switches to the shutdown mode; if the shutdown process does not need to be started, returning to step S2;

s4, a shutdown mode;

in the shutdown mode, the main controller module 1 controls the electromagnetic valve energy-saving protection module 7 to supply power to each electromagnetic valve in the multi-quality direct blending combustion device by adopting high-precision timing control and a DC24V power supply 73 which are higher than 10ms, and the main controller module 1 judges whether the shutdown process is finished or not according to a sensing signal of the sensor redundancy test module 6 until the shutdown process is finished.

The shutdown mode includes normal shutdown after the set flow is completed normally, and fault shutdown caused by a fault, see fig. 5, where the step of fault shutdown includes:

s4.1, judging that the key parameters are abnormal by the main controller module 1 according to the sensing signals of the sensor redundancy test module 6, and starting a fault shutdown mode;

s4.2, the main controller module 1 sends fault shutdown early warning signals to the air compressor control module 2 and the variable frequency pump control module 3;

s4.3, under the control of the main controller module 1, sequentially closing the alcohol supply valve 33, the softened water supply valve 36 and the second start-stop trigger 32 in sequence, closing the alcohol pump controller 31 and the third start-stop trigger 35 under the control of the second start-stop trigger 32, and closing the softened water pump controller 34 under the control of the third start-stop trigger 35;

s4.4, the main controller module 1 judges whether the step S4.3 is closed or not according to the sensing signal of the sensor redundancy test module 6, and if the step S4.3 is closed, the blowing process is started; if the closing is not finished, returning to the step S4.3;

s4.5, starting a blowing process until the repeated blowing process is more than twice, so as to reduce the residual amount of the alcohol working medium and ensure that the multi-working medium directly mixed combustion device is reliably shut down;

the blowing process comprises the following steps: the main controller module 1 controls the alcohol blowing supply valve 24 to be opened, the alcohol supply pipeline is blown by air for 20 seconds, the main controller module 1 controls the alcohol blowing supply valve 24 to be closed, the intermittence is 5 seconds, the main controller module 1 controls the softened water blowing supply valve 25 to be opened, the softened water supply pipeline is blown by air for 20 seconds, and the main controller module 1 controls the softened water blowing supply valve 25 to be closed, and the intermittence is 5 seconds;

and S4.6, after blowing is finished, the main controller module 1 closes the air supply valve 23, closes the first start-stop trigger 22, closes the air compressor controller 21, closes the alcohol blowing supply valve 24 and the softened water blowing supply valve 25 in sequence according to a control time sequence, and adopts a fault shutdown mode for safety protection, so that the combustion device and related systems are prevented from being damaged, and the use safety of the combustion device is improved.

By adopting the multi-mode automatic control switching method, the electromagnetic valve is ensured to be reliably switched on and off in the starting or shutdown process, the phenomenon that the temperature of the electromagnetic valve is continuously increased due to limited heat dissipation capacity under long-time and rated voltage working modes can be avoided, and the working reliability of the electromagnetic valve under different modes is improved.

The control mode of the control system based on the multi-working-medium direct blending combustion device further comprises a redundant test signal switching mode and a multi-working-medium abnormal state automatic adjusting mode.

Specifically, referring to fig. 7, the switching pattern of the redundant test signal includes the following steps:

a1, reading a sensing signal of the sensor redundancy test module 6 by the main controller module 1, and judging whether the multi-quality direct blending combustion device is in a steady-state working condition; if the test signal is in a steady state working condition, entering a judgment program for judging whether a redundant test signal switching mode is carried out; if the multi-quality direct blending combustion device is not in the steady-state working condition, the main controller module 1 continues to read the sensing signals of the sensor redundancy test module 6 until the multi-quality direct blending combustion device is in the steady-state working condition;

a2, determination procedure of whether to switch the mode of the redundant test signal: the two paths of independent signal values output by the redundant structure are X1 and X2, under a steady-state working condition, the test reference value is Sr, according to a sensing signal of the sensor redundancy test module 6, if | X1-Sr | is less than or equal to 0.1Sr, X1 is an effective parameter, and the main controller module 1 performs control decision according to X1; if the absolute value of X1-Sr is more than or equal to 0.1Sr and the absolute value of X2-Sr is less than or equal to 0.05Sr, and the state continuously exceeds 5 times, X2 is an effective parameter, and the main controller module 1 carries out control decision according to X2; and if the | X1-Sr ≧ 0.1Sr and the | X2-Sr ≧ 0.05Sr, starting the fault shutdown mode.

Referring to fig. 8-10, in the multi-working-medium abnormal-state automatic adjustment mode, the reference supply pressure of air is set to P under the steady-state working condition_AReference supply pressure of alcohol is P_EReference supply pressure of demineralized water P_W；

Actual air supply pressure P₁When P is₁－P_A≥0.1P_AThe supply pressure of the air abnormally rises; when P is present_A－P₁≥0.05P_AThe supply pressure of the air is abnormally lowered; actual alcohol supply pressure P₂When P is₂－P_E≥0.1P_EThe supply pressure of the air abnormally rises; when P is present_E－P₂≥0.05P_EThe supply pressure of the air is abnormally lowered; the supply pressure P of the actual softened water₃When P is₃－P_W≥0.1P_WSupply pressure of airAn abnormally elevated; when P is present_W－P₃≥0.05P_WThe supply pressure of the air is abnormally lowered; the specific adjusting process is as follows:

air supply pressure abnormal state regulation: after the main controller module 1 analyzes that the air supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module 6, the main controller module 1 sends a control signal to the air compressor controller 21 to adjust the pressure of the air compressor, whether the air pressure is normal or not is judged through the main controller module 1, and if the air pressure is normal, the air supply continues to work according to a rated working condition; if the air supply pressure is not normal, the main controller module 1 judges whether the air supply pressure is normal after the adjusting time is longer than 5 seconds, if the air supply pressure is normal, the air supply pressure continues to work according to a rated working condition, if the air supply pressure is still in an abnormal and low state, the main controller module 1 sends control signals to the alcohol pump controller 31 and the softened water pump controller 34, the rotating speeds of the alcohol pump and the softened water pump are reduced, and alcohol, softened water and air are all supplied under a low working condition; if the air supply pressure is still in an abnormal high state, entering a fault shutdown mode;

alcohol supply pressure abnormal state regulation: after the main controller module 1 analyzes that the alcohol supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module 6, the main controller module 1 sends a control signal to the alcohol pump controller 31 to adjust the rotating speed of the alcohol pump, whether the alcohol pressure is recovered to be normal or not is judged through the main controller module 1, and if the alcohol pressure is recovered to be normal, the alcohol pump is supplied to continue working according to a rated working condition; if the alcohol supply pressure is not normal, the main controller module 1 judges whether the alcohol supply pressure is normal after the adjusting time is more than 5 seconds, and if the alcohol supply pressure is normal, the main controller module continues to work according to a rated working condition; if the alcohol supply pressure is still in an abnormal low state, the main controller module 1 sends control signals to the air compressor controller 21 and the softened water pump controller 34, so that the pressure of the air compressor and the rotating speed of the softened water pump are reduced, and the alcohol, the softened water and the air are supplied under a low working condition; if the alcohol supply pressure is still in an abnormal high state, entering a fault shutdown mode;

softened water supply pressure abnormal state regulation: after the main controller module 1 tests that the supply pressure of the softened water is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module 6, the main controller module 1 sends a control signal to the softened water pump controller 34 to adjust the rotating speed of the softened water pump, whether the pressure of the softened water is recovered to be normal or not is judged through the main controller module 1, and if the pressure of the softened water is recovered to be normal, the softened water is supplied to continue working according to a rated working condition; if the softened water is not recovered to be normal, the main controller module 1 judges whether the softened water supply pressure is recovered to be normal after the adjusting time is more than 5 seconds, and if the softened water supply pressure is recovered to be normal, the softened water supply pressure continues to work according to the rated working condition; if the supply pressure of the softened water is still in an abnormal low state, the main controller module 1 sends control signals to the air compressor controller 21 and the alcohol pump controller 31 to reduce the pressure of the air compressor and the rotating speed of the alcohol pump, so that the alcohol, the softened water and the air are supplied under a low working condition; if the supply pressure of the softened water is still in an abnormal high state, entering a fault shutdown mode. By the automatic adjustment method of the abnormal state, the automatic correction of the working medium supply flow deviation is realized, the accidents of burning device ablation, burning interruption, emergency shutdown and the like caused by the abnormal working medium supply are avoided, and the self-adjustment capability of the control system for dealing with the abnormal events is improved.

The control method of the embodiment has the functions of self-recognition, self-analysis, self-protection and the like, and can rapidly generate water vapor with the temperature as high as 180 ℃ and the pressure as high as 1.2MPa within a few seconds by automatically controlling the supply and mixing combustion processes of working media such as air, alcohol, softened water and the like.

Claims

1. A control system of a multi-working-medium direct mixing combustion device is characterized in that: the system comprises a main controller module (1), a multi-working medium transfer control module (4), a softened water treatment control module (5), a sensor redundancy test module (6), an electromagnetic valve energy-saving protection module (7) and a liquid level test module (11);

the multi-working-medium transfer control module (4) comprises an alcohol transfer pump (41), an alcohol transfer valve (42), a diesel oil transfer pump (43) and a diesel oil transfer valve (44); the alcohol transfer pump (41), the alcohol transfer valve (42), the diesel oil transfer pump (43) and the diesel oil transfer valve (44) are respectively in communication connection with the main controller module (1) and are used for being opened or closed under the control of a control signal of the main controller module (1);

the softened water treatment control module (5) comprises a tap water supply valve (51), a softened water treatment start-stop trigger (52), a softened water transfer pump (53) and a softened water transfer valve (54); the tap water supply valve (51), the softened water treatment start-stop trigger (52), the softened water transfer pump (53) and the softened water transfer valve (54) are respectively in communication connection with the main controller module (1) and are used for being opened or closed under the control of a control signal of the main controller module (1);

the sensor redundancy test module (6) comprises two groups of pressure sensors (61) and two groups of temperature sensors (62); the two groups of pressure sensors (61) and the two groups of temperature sensors (62) are respectively in communication connection with the main controller module (1) and are used for respectively sending sensing signals to the main controller module (1);

the electromagnetic valve energy-saving protection module (7) comprises two different direct-current power supplies, a double-power-supply switching circuit (71) and a solid-state relay driving circuit (72); the dual-power switching circuit (71) is in communication connection with the main controller module (1) and is used for switching a direct-current power supply communicated to the solid-state relay driving circuit (72) under the control of a control signal of the main controller module (1); the solid relay driving circuit (72) is used for driving each electromagnetic valve in the multi-working medium direct blending combustion device;

the liquid level testing module (11) comprises an alcohol storage tank liquid level meter (111) arranged in the alcohol storage tank, a softened water storage tank liquid level meter (112) arranged in the softened water storage tank and an air compressor oil tank liquid level meter (113) arranged in an air compressor oil tank; the alcohol storage tank liquid level meter (111), the softened water storage tank liquid level meter (112) and the air compressor oil tank liquid level meter (113) are respectively in communication connection with the main controller module (1) and used for respectively sending sensing signals to the main controller module (1).

2. The control system for a multi-working-substance direct-blending combustion apparatus according to claim 1, further comprising an air compressor control module (2);

the air compressor control module (2) comprises a first start-stop trigger (22), an air compressor controller (21), an air supply valve (23), a softened water blowing supply valve (25) and an alcohol blowing supply valve (24); a softened water blow-off supply valve (25), an alcohol blow-off supply valve (24) and an air supply valve (23) for opening or closing under the control of the main controller module (1);

the first start-stop trigger (22) is connected with one end of the air compressor controller (21) and is used for being opened or closed under the control of a control signal sent by the main controller module (1) so as to control the opening and closing of the air compressor controller (21); the other end of the air compressor controller (21) is in communication connection with the main controller module (1) and is used for adjusting the power of the air compressor under the control of the main controller module (1).

3. The control system for a multi-working-medium direct-blending combustion apparatus according to claim 2, further comprising a variable frequency pump control module (3),

the variable frequency pump control module (3) comprises an alcohol pump controller (31), a second start-stop trigger (32), an alcohol supply valve (33), a softened water pump controller (34), a third start-stop trigger (35) and a softened water supply valve (36);

the second start-stop trigger (32), the alcohol supply valve (33), the third start-stop trigger (35) and the softened water supply valve (36) are respectively in communication connection with the main controller module (1) and are opened or closed under the control of the main controller module (1);

the second start-stop trigger (32) is connected with one end of the alcohol pump controller (31) and used for controlling the start or the stop of the alcohol pump controller (31), and the third start-stop trigger (35) is connected with one end of the softened water pump controller (34) and used for controlling the start or the stop of the softened water pump controller (34);

the other end of the alcohol pump controller (31) is connected with the main controller module (1) and is used for adjusting the rotating speed of the alcohol pump under the control of the main controller module (1);

the other end of the softening water pump controller (34) is connected with the main controller module (1) and is used for adjusting the rotating speed of the softening water pump under the control of the main controller module (1).

4. The control system of the multi-working-medium direct-blending combustion device according to claim 3, further comprising a redundant ignition control module (8), a one-key start-stop trigger control module (9) and a control terminal (10);

the redundant ignition control module (8) comprises two sets of ignition control assemblies, and each set of ignition control assembly is used for controlling ignition of a spark plug under the control of the main controller module (1);

the one-key start-stop trigger control module (9) is used for sending an equipment start signal or an equipment close signal to the main controller module (1);

the control terminal (10) is used for receiving and displaying the process parameters from the main controller module (1) and is provided with an input assembly for sending process parameter instructions to the main controller module (1).

5. A multi-working-medium direct blending combustion device is characterized in that: a control system comprising the multi-biomass direct-blending combustion apparatus according to any one of claims 1 to 4.

6. A control method of a multi-working-medium direct blending combustion device is applied to the control system of the multi-working-medium direct blending combustion device disclosed by claim 4, and is characterized by comprising a starting mode, an operating mode and a shutdown mode, and the steps are as follows:

s1, in a starting mode, the main controller module (1) controls the electromagnetic valve energy-saving protection module (7) to adopt timing control with the precision higher than 10ms and a DC24V power supply (73) to supply power to each electromagnetic valve in the multi-quality direct blending combustion device;

s2, the main controller module (1) judges whether the multi-quality direct blending combustion device successfully ignites or not according to the sensing signal of the sensor redundancy test module (6), and if the ignition is successful, the working mode is switched; if the ignition is unsuccessful, returning to the step S1;

s3, in the working mode, the main controller module (1) controls the electromagnetic valve energy-saving protection module (7) to supply power to each electromagnetic valve in the multi-working-medium direct blending combustion device by adopting logic control and a DC10V power supply (74); the main controller module (1) judges whether an alcohol transfer pump (41), a diesel oil transfer pump (43) and a softened water transfer pump (53) are used for transferring corresponding working media to the alcohol storage tank, the air compressor oil tank and the softened water storage tank according to sensing signals output by the liquid level testing module (11) until a shutdown mode is entered;

s4, the main controller module (1) judges whether to start the shutdown mode according to the sensing signal of the sensor redundancy test module (6), and if the shutdown mode needs to be started, the shutdown mode is switched to; if the shutdown process does not need to be started, returning to step S3;

s5, in a shutdown mode, the main controller module (1) controls the electromagnetic valve energy-saving protection module (7) to supply power to each electromagnetic valve in the multi-quality direct blending combustion device by adopting timing control with the precision higher than 10ms and a DC24V power supply (73), and the main controller module (1) judges whether a shutdown process is finished or not according to a sensing signal of the sensor redundancy test module (6) until the shutdown process is finished.

7. The method as claimed in claim 6, wherein the shutdown mode in step S5 comprises a fail-off mode, and the fail-off mode comprises the following steps:

s5.1, judging that a fault shutdown mode needs to be started by the main controller module (1) according to a sensing signal of the sensor redundancy test module (6);

s5.2, the main controller module (1) sends a fault shutdown early warning signal to the air compressor control module (2) and the variable frequency pump control module (3);

s5.3, under the control of the main controller module (1), sequentially closing the alcohol supply valve (33), the softened water supply valve (36) and the second start-stop trigger (32), closing and controlling the alcohol pump controller (31) and the third start-stop trigger (35) under the control of the second start-stop trigger (32), and closing and controlling the softened water pump controller (34) under the control of the third start-stop trigger (35);

s5.4, the main controller module (1) judges whether the step S5.3 is closed or not according to the sensing signal of the sensor redundancy test module (6), and if the step S5.3 is closed, the blowing process is started; if the closing is not finished, returning to the step S5.3;

s5.5, starting a blowing process until the blowing process is repeated more than twice; the blowing process comprises the following steps: the main controller module (1) controls the alcohol blowing supply valve (24) to be opened, the alcohol supply pipeline is blown by air for 20 seconds, the main controller module (1) controls the alcohol blowing supply valve (24) to be closed, the interval is 5 seconds, the main controller module (1) controls the softened water blowing supply valve (25) to be opened, the softened water supply pipeline is blown by air for 20 seconds, and the main controller module (1) controls the softened water blowing supply valve (25) to be closed, and the interval is 5 seconds;

s5.6, after blowing is finished, sequentially closing the air supply valve (23), closing the first start-stop trigger (22) and closing the air compressor controller (21), the alcohol blowing supply valve (24) and the softened water blowing supply valve (25) under the control of the first start-stop trigger (22) through the main controller module (1).

8. The method for controlling a multi-working-medium direct-blending combustion device according to claim 6 or 7, wherein the step of starting the start mode in step S1 is as follows:

s1.1, blowing stage: performing a blowing process until the blowing process is more than ten times; the blowing process comprises the following steps: the main controller module (1) controls the alcohol blowing supply valve (24) to be opened, the alcohol supply pipeline is blown by air for 20 seconds, the main controller module (1) controls the alcohol blowing supply valve (24) to be closed, the interval is 5 seconds, the main controller module (1) controls the softened water blowing supply valve (25) to be opened, the softened water supply pipeline is blown by air for 20 seconds, and the main controller module (1) controls the softened water blowing supply valve (25) to be closed, and the interval is 5 seconds;

s1.2, after blowing is finished, the main controller module (1) sequentially and synchronously powers on the two paths of spark plugs, opens the alcohol supply valve (33), opens the air supply valve (23) and opens the softened water supply valve (36) to perform ignition operation according to a control time sequence;

s1.3, judging whether ignition is successful or not by the main controller module (1) according to a sensing signal of the sensor redundancy test module (6); if the ignition is successful, ending; if the ignition is not successful, the fault shutdown mode is operated, and the step S1.1 is returned.

9. The method as claimed in claim 8, further comprising switching modes of redundant test signals, comprising the steps of:

a1, reading a sensing signal of a sensor redundancy test module (6) by a main controller module (1), and judging whether the multi-quality direct blending combustion device is in a steady-state working condition or not; if the test signal is in a steady state working condition, entering a judgment program for judging whether a redundant test signal switching mode is carried out; if the multi-working-quality direct blending combustion device is not in the steady-state working condition, the main controller module (1) continues to read the sensing signals of the sensor redundancy test module (6) until the multi-working-quality direct blending combustion device is in the steady-state working condition;

a2, determination procedure of whether to switch the mode of the redundant test signal: the two paths of independent signal values output by the redundancy structure are X1 and X2, under a steady-state working condition, the test reference value is Sr, according to a sensing signal of the sensor redundancy test module (6), if | X1-Sr | is less than or equal to 0.1Sr, X1 is an effective parameter, and the main controller module (1) performs control decision according to X1; if the absolute value of X1-Sr is more than or equal to 0.1Sr and the absolute value of X2-Sr is less than or equal to 0.05Sr, and the state continuously exceeds 5 times, X2 is an effective parameter, and the main controller module (1) carries out control decision according to X2; and if the | X1-Sr ≧ 0.1Sr and the | X2-Sr ≧ 0.05Sr, starting the fault shutdown mode.

10. The method for controlling the multi-working-medium direct blending combustion device according to claim 9, further comprising a multi-working-medium abnormal state automatic adjustment mode;

air supply pressure abnormal state regulation: after the main controller module (1) analyzes that the air supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module (6), the main controller module (1) sends a control signal to the air compressor controller (21) to adjust the pressure of the air compressor, whether the air pressure is recovered to be normal or not is judged through the main controller module (1), and if the air pressure is recovered to be normal, the air supply continues to work according to the rated working condition; if the air supply pressure is not normal, the main controller module (1) judges whether the air supply pressure is normal after the adjusting time is more than 5 seconds, and if the air supply pressure is normal, the air supply pressure continues to work according to a rated working condition; if the air supply pressure is still in an abnormal low state, the main controller module (1) sends control signals to the alcohol pump controller (31) and the softened water pump controller (34) to reduce the rotating speed of the alcohol pump and the softened water pump so that alcohol, softened water and air are supplied under a low working condition; if the air supply pressure is still in an abnormal high state, entering a fault shutdown mode;

alcohol supply pressure abnormal state regulation: after the main controller module (1) analyzes that the alcohol supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module (6), the main controller module (1) sends a control signal to the alcohol pump controller (31) to adjust the rotating speed of the alcohol pump, whether the alcohol pressure is recovered to be normal or not is judged through the main controller module (1), and if the alcohol pressure is recovered to be normal, the alcohol pump is supplied to continue working according to the rated working condition; if the alcohol supply pressure is not normal, the main controller module (1) judges whether the alcohol supply pressure is normal after the adjusting time is more than 5 seconds, and if the alcohol supply pressure is normal, the main controller module continues to work according to a rated working condition; if the alcohol supply pressure is still in an abnormal low state, the main controller module (1) sends control signals to the air compressor controller (21) and the softened water pump controller (34) to reduce the pressure of the air compressor and the rotating speed of the softened water pump, so that alcohol, softened water and air are supplied under a low working condition; if the alcohol supply pressure is still in an abnormal high state, entering a fault shutdown mode;

softened water supply pressure abnormal state regulation: after the main controller module (1) tests that the softened water supply pressure is abnormally high or abnormally low according to the sensing signal of the sensor redundancy test module (6), the main controller module (1) sends a control signal to the softened water pump controller (34) to adjust the rotating speed of the softened water pump, whether the softened water pressure is recovered to be normal or not is judged through the main controller module (1), and if the softened water pressure is recovered to be normal, the softened water is supplied to continue working according to a rated working condition; if the softened water is not recovered to be normal, the main controller module (1) judges whether the softened water supply pressure is recovered to be normal after the adjusting time is more than 5 seconds, and if the softened water supply pressure is recovered to be normal, the softened water supply pressure continues to work according to the rated working condition; if the supply pressure of the softened water is still in an abnormal low state, the main control module (1) sends control signals to an air compressor controller (21) and an alcohol pump controller (31) to reduce the pressure of the air compressor and the rotating speed of an alcohol pump, so that alcohol, softened water and air are supplied under a low working condition; if the supply pressure of the softened water is still in an abnormal high state, entering a fault shutdown mode.