CN117570430A - Automatic pollution discharge control system, method and device for water in gas boiler and storage medium - Google Patents

Abstract

The application is applicable to the technical field of automatic control, and provides a system, a method, a device and a storage medium for automatic pollution discharge control of boiler water of a gas boiler, wherein the system comprises: the device comprises a gas boiler, a first sewage drain pipe, a filtering pool, a second sewage drain pipe, a continuous row expansion vessel, a first electric regulating valve, a conductivity probe and a control device; the gas boiler is connected with the filter through tank through a first sewage drain pipe and connected with the continuous-row expansion vessel through a second sewage drain pipe; the first electric regulating valve is arranged on the second sewage drain pipe; the conductivity probe is arranged in the filtering pool; the control device is respectively connected with the first electric regulating valve and the conductivity probe; the control device is used for controlling the opening degree of the first electric regulating valve by taking the minimum difference value between the conductivity monitored by the conductivity probe and the preset conductivity as a target through a PID control method so as to regulate the flow of the furnace water discharged by the gas boiler into the continuous-discharge expansion vessel. The utility model provides a reduce the discharge stove water yield when can guaranteeing the blowdown effect, improve the efficiency of boiler and reduce the energy extravagant.

Description

Automatic pollution discharge control system, method and device for water in gas boiler and storage medium

Technical Field

The application belongs to the technical field of automatic control, and particularly relates to an automatic blowdown control system, method and device for boiler water of a gas boiler and a storage medium.

Background

The existing small-sized low-pressure steam boiler has insufficient degree of importance in the pollution discharge of the boiler, the water quality of the boiler is analyzed through intermittent sampling and assaying, the size and the time of the pollution discharge are determined, continuous pollution discharge is used as regular pollution discharge, the water quality index of the boiler is controlled to lag, periodic regular fluctuation is formed, and the quality control of the boiler is unstable.

In the operation of the existing boiler, part of operators worry that the boiler is fouled because of water quality problems, continuous pollution discharge is replaced by a long-time intermittent pollution discharge mode, and energy waste and medicament waste are caused due to overlong pollution discharge time.

Disclosure of Invention

The embodiment of the application provides a system, a method, a device and a storage medium for automatically discharging water in a gas boiler, so as to reduce the amount of discharged water in the boiler, improve the efficiency of the boiler and reduce the energy waste while ensuring the pollution discharge effect.

The application is realized by the following technical scheme:

in a first aspect, embodiments of the present application provide an automatic blowdown control system for boiler water of a gas boiler, including: the device comprises a gas boiler, a first sewage drain pipe, a filtering pool, a second sewage drain pipe, a continuous row expansion vessel, a first electric regulating valve, a conductivity probe and a control device.

The gas boiler is connected with the filter through tank through a first sewage drain pipe and connected with the continuous-row expansion vessel through a second sewage drain pipe; the first electric regulating valve is arranged on the second sewage drain pipe; the conductivity probe is arranged in the filtering pool; the control device is respectively connected with the first electric regulating valve and the conductivity probe.

The gas boiler discharges the furnace water to the filtering pool through the first sewage drain pipe.

The conductivity probe is used for monitoring the conductivity of the furnace water in the filtering pool and transmitting the conductivity to the control device.

And the control device is used for controlling the opening degree of the first electric regulating valve by taking the minimum difference value between the conductivity monitored by the conductivity probe and the preset conductivity as a target through a PID control method so as to regulate the flow of the furnace water discharged by the gas boiler into the continuous-row expansion vessel.

With reference to the first aspect, in some possible implementations, the automatic blowdown control system for gas boiler water further includes: a cooler.

The cooler is arranged on the first sewage drain pipe. The cooler is used for cooling the water discharged from the gas boiler to the filtering pool.

With reference to the first aspect, in some possible implementations, the automatic blowdown control system for gas boiler water further includes: a first stop valve and two second stop valves.

The first stop valve is arranged at the joint of the cooler and the first sewage drain pipe; the two second stop valves are respectively arranged on the second sewage pipes at the two ends of the first electric regulating valve.

With reference to the first aspect, in some possible implementations, the automatic blowdown control system for gas boiler water further includes: branch sewage pipes and branch regulating valves.

The two ends of the branch sewage pipes are respectively communicated with the two ends of the target section pipeline on the second sewage pipes, and the target section pipeline comprises two second stop valves and the second sewage pipes in the middle of the two second stop valves. The branch regulating valve is arranged on the branch sewage pipeline.

With reference to the first aspect, in some possible implementations, a conductivity probe is disposed at an upper end of the filter tank; the water inlet of the filter passing pond is positioned at the lower end of the filter passing pond, and the water outlet of the filter passing pond is positioned at the upper end of the filter passing pond.

With reference to the first aspect, in some possible implementations, the number of conductivity probes is a plurality; the conductivity probes are respectively arranged at different positions of different heights of the filtering pool.

With reference to the first aspect, in some possible implementations, the material of the first sewage drain pipe and the second sewage drain pipe is stainless steel.

In a second aspect, an embodiment of the present application provides a method for controlling automatic blowdown of water in a gas boiler, which is applied to a control device in the automatic blowdown control system of water in a gas boiler according to any one of the first aspect, and the method includes:

acquiring the conductivity monitored by a conductivity probe;

obtaining a target conductivity difference value based on the conductivity monitored by the conductivity probe and the preset conductivity;

and controlling the opening degree of the first electric regulating valve by using the PID control method with the minimum target conductivity difference as a target so as to regulate the flow quantity of the discharged furnace water of the gas boiler into the continuous-discharge expansion vessel.

In a third aspect, an embodiment of the present application provides a control apparatus, including: a processor and a memory for storing a computer program, which when executed by the processor implements the automatic blowdown control method for gas boiler water according to any one of the second aspects.

In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for controlling automatic blowdown of water in a gas boiler according to any one of the second aspects.

It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.

Compared with the prior art, the embodiment of the application has the beneficial effects that:

the utility model provides a through conductivity probe monitoring conductivity to give controlling means with conductivity transmission, controlling means passes through the aperture of PID control method control first electric control valve, with the circulation of adjusting gas boiler to discharging the stove water in the row's of expansion vessel 104, replace traditional artificial long-time intermittent blowdown, reduce the stove water yield of discharging when guaranteeing the blowdown effect, reduced the use amount of medicament, reduced the waste of resource, the reduction of discharging the stove water yield can reduce the loss of heat, improved the thermal utilization ratio of boiler, improved the efficiency of boiler, reduced the waste of the energy.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a system for controlling automatic blowdown of water in a gas boiler according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a system for controlling automatic blowdown of water in a gas boiler according to another embodiment of the present application;

FIG. 3 is a schematic view of a conductivity probe placement location provided in an embodiment of the present application;

FIG. 4 is a schematic flow chart of a method for controlling automatic pollution discharge of water in a gas boiler according to an embodiment of the present application;

FIG. 5 is a graph of the variation of TDS values controlled by a conventional method provided by an embodiment of the present application;

FIG. 6 is a graph of the variation of TDS values controlled by the present method provided by an embodiment of the present application;

fig. 7 is a schematic structural diagram of a control device in a system for controlling automatic blowdown of water in a gas boiler according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It should be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in this specification and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

In addition, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

The embodiment of the application provides an automatic blowdown control system of gas boiler furnace water, and fig. 1 is a schematic structural diagram of the automatic blowdown control system of gas boiler furnace water provided by an embodiment of the application, and referring to fig. 1, the system includes: the gas boiler 100, a first sewage drain pipe 101, a filter tank 102, a second sewage drain pipe 103, a row of expansion vessels 104, a first electric control valve 105, a conductivity probe 106 and a control device 107.

The gas boiler 100 is connected with the filter tank 102 through a first sewage drain pipe 101 and is connected with a continuous row expansion vessel 104 through a second sewage drain pipe 103; the first electric control valve 105 is arranged on the second sewage drain pipe 103; the conductivity probe 106 is arranged in the filter tank 102; the control device 107 is connected to the first electrically operated control valve 105 and the conductivity probe 106, respectively.

The gas boiler 100 discharges the furnace water to a filtrate tank 102 through a first drain pipe 101.

A conductivity probe 106 for monitoring the conductivity of the furnace water in the filtrate basin 102 and transmitting the conductivity to a control device 107.

And a control device 107 for controlling the opening degree of the first electric control valve 105 by a PID control method with the aim of minimizing the difference between the electric conductivity monitored by the electric conductivity probe 106 and the preset electric conductivity so as to regulate the flow rate of the furnace water discharged from the gas boiler 100 into the in-line expansion vessel 104.

According to the automatic blowdown control system for the gas boiler water, the conductivity is monitored through the conductivity probe 106 and is transmitted to the control device 107, the control device 107 controls the opening of the first electric regulating valve 105 through the PID control method to regulate the flow of the gas boiler 100 to discharge the boiler water into the continuous blowdown flash vessel 104, the traditional manual long-time intermittent blowdown is replaced, the discharge boiler water quantity is reduced while the blowdown effect is ensured, the usage amount of medicaments is reduced, the waste of resources is reduced, the heat loss can be reduced due to the reduction of the discharge boiler water quantity, the utilization rate of boiler heat is improved, the efficiency of the boiler is improved, and the waste of energy is reduced.

Exemplary, fig. 2 is a schematic structural diagram of a system for controlling automatic blowdown of water in a gas boiler according to another embodiment of the present application, and referring to fig. 2, the system for controlling automatic blowdown of water in a gas boiler may further include: a cooler 108.

The cooler 108 is provided on the first drain 101. The cooler 108 is used for cooling the water discharged from the gas boiler 100 to the filter passage tank 102.

Specifically, in order to facilitate the conductivity probe 106 to obtain more accurate conductivity, the furnace water needs to be cooled, and meanwhile, the service life of the conductivity probe 106 can be guaranteed, the frequency of replacing the conductivity probe 106 is reduced, the waste of resources is reduced, and the cost is saved.

Illustratively, referring to FIG. 2, the gas boiler water automatic blowdown control system may further comprise: a first shut-off valve 109 and two second shut-off valves 110.

The first stop valve 109 is arranged at the joint of the cooler 109 and the first sewage drain pipe 101; two second shut-off valves 110 are respectively arranged on the second sewage pipes 103 at two ends of the first electric regulating valve 105.

Specifically, in order to ensure personal safety of the worker when the equipment is replaced, the first stop valve 109 and the second stop valve 110 are provided, and when the worker replaces the equipment, the first stop valve 109 and the second stop valve 110 are closed, and after the worker completes the replacement work, the first stop valve 109 and the second stop valve 110 are opened after leaving the dangerous area.

Illustratively, referring to FIG. 2, the gas boiler water automatic blowdown control system may further comprise: a branch sewage drain 111 and a branch regulating valve 112.

The two ends of the branch sewage drain 111 are respectively connected to two ends of a target section pipeline on the second sewage drain 103, and the target section pipeline includes two second stop valves 110 and the second sewage drain 103 in the middle. The branch regulating valve 112 is provided on the branch sewage drain 111.

Specifically, in order to ensure that the boiler water of the gas boiler can still be normally discharged when the equipment is replaced, the branch sewage drain pipe 111 and the branch regulating valve 112 are arranged at the moment, and the opening degree of the branch regulating valve 112 can be regulated when the first electric regulating valve 105 cannot work so as to regulate the flow of the boiler water discharged from the gas boiler 100 into the continuous discharge flash vessel 104. The bypass regulating valve 112 may be a manual regulating valve or an electric regulating valve.

Specifically, an electric shut-off valve may be provided in the bypass sewage drain 111 to facilitate blocking the passage of the furnace water when the bypass regulating valve 112 is replaced or maintained.

For example, referring to fig. 2 and 3, a conductivity probe 106 may be provided at the upper end of the filtrate tank 102; the water inlet of the filter passing pond 102 is positioned at the lower end of the filter passing pond 102, and the water outlet of the filter passing pond 102 is positioned at the upper end of the filter passing pond 102.

Specifically, the upper end of the filter passing pond 102 refers to the upper end of the filter passing pond 102 in the vertical direction, and the conductivity probe 106 can be made to penetrate 10 to 20cm into the furnace water. It can be ensured that the conductivity probe 106 can normally monitor the conductivity of the furnace water.

Specifically, the water inlet is arranged at the lower part of the side wall of the filtering and passing pond 102, the water outlet is arranged at the upper part of the side part of the filtering and passing pond 102, so that the just-in furnace water can generate certain impact on the previous furnace water, the particles in the furnace water are prevented from being deposited, the relative uniformity of the conductivity of the furnace water in the filtering and passing pond 102 can be ensured under the condition that the size of the filtering and passing pond 102 is not large, and the monitored conductivity is more accurate.

Illustratively, the number of conductivity probes 106 may be a plurality; the plurality of conductivity probes 106 may be disposed at different locations at different heights of the filtrate tank 102, respectively.

Specifically, as shown in fig. 3, when the volume of the filtering pool 102 is too large, in order to ensure accuracy of conductivity monitoring, a plurality of conductivity probes 106 are provided, and the plurality of conductivity probes 106 are distributed at different heights of the filtering pool 102, and at the same time, a plurality of parallel conductivity probes 106 are also provided at the same height. The average value of the plurality of conductivities measured by the plurality of conductivity probes 106 is transmitted as the conductivity to the control device 107.

Illustratively, the first and second drain pipes 101 and 103 may be stainless steel.

Specifically, the material of the branch sewage drain 111 can also be stainless steel material, and the sewage drain of stainless steel material can prevent the rust generated by the pipeline itself from affecting the conductivity monitoring, ensure the accuracy of the monitored conductivity, improve the control precision of the system, reduce the waste of energy and fully utilize the resources.

Specifically, the control device 107 is provided with a 485 communication interface, and can be connected with the plurality of first electric adjusting valves 105, so as to control the opening degree of the plurality of first electric adjusting valves 105, and adjust the flow of the furnace water discharged from the plurality of gas boilers 100 into the continuous expansion vessel 104. Conductivity monitoring and emission control of a plurality of gas boilers 100 are realized.

In addition, the conductivity is influenced by various factors, but under the environment of normal temperature, the ratio of the value of the dissolved fixture TDS in the furnace water to the conductivity is about 1.428, so that the value of the dissolved fixture TDS in the furnace water is guaranteed to be near a certain preset value by monitoring the conductivity.

Illustratively, the automatic blowdown control system for gas boiler water may further comprise: dissolved solids TDS monitor.

Illustratively, a dissolved solids TDS monitor is disposed in the filtrate tank 102 for monitoring the value of dissolved solids TDS in the furnace water.

Specifically, the value of the TDS converted from the conductivity can be compared with the value of the TDS actually monitored, if the deviation of the two values is within the error range, the monitoring of the conductivity can be determined to be accurate, so that the PID control is performed afterwards, and if the deviation of the two values is not within the error range, the monitoring of the conductivity is determined to be inaccurate, and the data needs to be re-acquired or the mean value needs to be calculated after the data is re-acquired.

The method has the advantages that the TDS value is indirectly calculated through conductivity instead of directly obtaining the TDS value, the step of manual or equipment sampling in actual production can be reduced, the efficiency is relatively higher, compared with the method that the error possibility is smaller due to manual sampling, the stability of the automatic pollution discharge control system of the whole gas boiler water is better, the efficiency is higher, the change can be responded in time, and the timeliness of the automatic pollution discharge control system of the gas boiler water is guaranteed.

Specifically, the control device 107 converts the acquired signal into a 4-20 mA signal through the transmitter, and transmits the signal to the first electric regulating valve 105, and the first electric regulating valve 105 adjusts the valve opening according to the received signal value, so as to realize continuous adjustment of the sewage discharge. The system has shorter time for obtaining the TDS value, so that the TDS value can be accurately controlled, and the average TDS value of the furnace can be close to the maximum allowable value. Thus, the phenomenon of steam carrying and foaming caused by high TDS concentration can be avoided, the boiler discharge capacity is minimized, and the energy is saved.

Specifically, for the index requirement of the furnace water, the highest value of the control index of the dissolved solids without the superheater of the low-pressure boiler is 3500mg/L, and the highest value of the conductivity control index is 5600us/cm. The conductivity CT=5000 us/cm in the scheme, when the conductivity is lower than the set value 5000us/cm, the opening of the valve is turned down, so that the waste of heat of pollution discharge is prevented; when the conductivity rises above 5000us/cm, the valve opening is increased, so that the problems of inaccurate liquid level and scaling of the boiler caused by deterioration of the water quality of the boiler are prevented. The temperature of the boiler water discharged by the low-pressure steam boiler is generally 180-200 ℃, exceeds the temperature application range of a common TDS instrument and a common conductivity probe, and the boiler water is cooled by a cooler to be lower than 40 ℃, so that the boiler water in the flow cell adopts a mode of entering from bottom to top and discharging from bottom, long running water is kept, and pollution discharge impurities are prevented from being precipitated on the conductivity probe. The electric regulating valve is provided with a 4-20 mA valve position feedback signal, the current valve position feedback signal can be fed back to the control device, the electric regulating valve is used as an actuating mechanism, and further instructions of the control device are received to regulate the valve opening.

Fig. 4 is a schematic flow chart of a method for controlling automatic blowdown of water in a gas boiler according to an embodiment of the present application, and referring to fig. 4, the method for controlling automatic blowdown of water in a gas boiler is described in detail as follows:

and 101, acquiring the conductivity monitored by the conductivity probe 106.

And 102, obtaining a target conductivity difference value based on the conductivity monitored by the conductivity probe 106 and the preset conductivity.

Step 103, controlling the opening degree of the first electric control valve 105 by using the PID control method with the minimum target conductivity difference as a target, so as to adjust the flow quantity of the furnace water discharged from the gas boiler 100 into the in-line flash vessel 104.

Specifically, the PLC in the control device 107 forms a closed loop control algorithm. The AI analog signal and DI data have conductivity values, valve position feedback values of valve opening, motor current signals, valve opening limit signals and closing limit signals. The AO analog signal sent by the PLC has a valve position execution opening value, and the executor implements a PID algorithm, and implements closed-loop control on the first electric control valve 105.

Specifically, the opening degree of the first electric regulating valve 105 is controlled by a PID control method, so that the method has certain predictability, can predict the future deviation of the electric conductivity, and can adjust the opening degree in advance before exceeding a certain target electric conductivity difference value so as to cope with the change of the target electric conductivity difference value, further ensure the stability of the electric conductivity in the furnace water and ensure the normal and stable operation of the gas-fired boiler. In addition, compared with the traditional intermittent emission for a long time, the emission amount is less, the energy waste and the medicament waste can be reduced, and the heat production efficiency of the gas boiler is improved. And the boiler water is not discharged excessively, the phenomenon of boiler scaling is reduced, and the stable operation of the boiler is ensured.

Specifically, the PID control includes: proportional control, integral control and differential control.

(1) Proportional control

u (t) =kpe (t) formula (1)

(2) Proportional + integral

(3) Proportional + integral + differential

Where Kp represents a proportionality coefficient, ti represents an integration time constant, td represents a differentiation time constant, u (t) represents a controller output value, e (t) represents a deviation of a set value from an input value, and t represents a regulation period.

The basic deviation e (t) of the reaction system has large coefficient, which can quicken the adjustment and reduce the error, but the excessive proportion reduces the stability of the system and even causes the instability of the system.

The integral and the accumulated deviation of the reaction system enable the system to eliminate steady-state errors and improve no-difference degree, and because of the errors, integral adjustment is carried out until no errors exist.

The differential, reflected deviation change rate e (t) -e (t-1) has predictability, can predict deviation change trend, and can produce advanced control action, before the deviation is not formed, the differential regulation action can be eliminated so as to improve dynamic performance of system.

The PID control adopted by the scheme introduces integration on the basis of proportion, can eliminate residual error, and then adds differential action, and can improve the stability of the system. It is suitable for the occasion with larger control channel time constant or capacity lag and higher control requirement. In particular, in a control loop of on-line conductivity monitoring analysis data, the set data range of the proportionality coefficient is 1.0-3.0; the setting range of the integration time constant is 10-50; the set range of the differential time constant is 0-2; the specific size setting needs to be adaptively adjusted according to the actual situation of each item.

In order to better highlight the advantages of the scheme control, the following comparative experiments were performed:

experiment one: the furnace water was discharged by a conventional long-time intermittent method, and a curve of TDS values thereof was obtained, as shown in fig. 5.

Experiment II: the method of the scheme is adopted to discharge furnace water and obtain a curve of TDS value, as shown in figure 6.

As can be seen from comparison, the traditional method is easy to enable the TDS value to exceed the preset range, and the TDS can be kept within the preset range. In addition, the method of the scheme can enable the TDS to be kept stable in a smaller range, and the stability of the system is better.

It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.

The embodiment of the present application further provides a control device, referring to fig. 7, the control device 300 may include: at least one processor 310, a memory 320, the memory 320 being adapted to store a computer program 321, the processor 310 being adapted to invoke and execute the computer program 321 stored in the memory 320 to perform the steps of any of the various method embodiments described above, such as steps 201 to 203 in the embodiment shown in fig. 4.

By way of example, the computer program 321 may be partitioned into one or more modules/units that are stored in the memory 320 and executed by the processor 310 to complete the present application. The one or more modules/units may be a series of computer program segments capable of performing specific functions for describing the execution of the computer program in the control device 300.

It will be appreciated by those skilled in the art that fig. 7 is merely an example of a control device and is not limiting of the control device, and may include more or fewer components than shown, or may combine certain components, or different components, such as input-output devices, network access devices, buses, etc.

The processor 310 may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 320 may be an internal memory unit of the control device, or may be an external memory device of the control device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card), or the like. The memory 320 is used to store the computer program and other programs and data required by the control device. The memory 320 may also be used to temporarily store data that has been output or is to be output.

The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or one type of bus.

The automatic pollution discharge control method for the gas boiler water provided by the embodiment of the application can be applied to control devices such as a computer, wearable equipment, vehicle-mounted equipment, a tablet personal computer, a notebook computer, a netbook and the like, and the specific type of the control device is not limited.

The embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program realizes the steps in each embodiment of the automatic pollution discharge control method for the gas boiler water when being executed by a processor.

The embodiments of the present application provide a computer program product, which when executed on a mobile terminal, causes the mobile terminal to implement the steps in each embodiment of the method for controlling automatic blowdown of water in a gas boiler.

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/control device, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions in actual implementation, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection via interfaces, devices or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (10)

1. An automatic blowdown control system for boiler water of a gas boiler, comprising: the device comprises a gas boiler, a first sewage drain pipe, a filtering pool, a second sewage drain pipe, a continuous row expansion vessel, a first electric regulating valve, a conductivity probe and a control device;

the gas boiler is connected with the filtering pool through the first sewage drain pipe and is connected with the continuous-row dilatation device through the second sewage drain pipe; the first electric regulating valve is arranged on the second sewage drain pipe; the conductivity probe is arranged in the filter tank; the control device is respectively connected with the first electric regulating valve and the conductivity probe;

the gas boiler discharges furnace water to the filtering pool through the first sewage drain pipe;

the conductivity probe is used for monitoring the conductivity of the furnace water in the filtering pool and transmitting the conductivity to the control device;

the control device is used for controlling the opening degree of the first electric regulating valve by taking the minimum difference value between the electric conductivity monitored by the electric conductivity probe and the preset electric conductivity as a target through a PID control method so as to regulate the flow quantity of the furnace water discharged from the gas boiler to the continuous-discharge expansion vessel.

2. The automatic blowdown control system for gas boiler water as claimed in claim 1, wherein said automatic blowdown control system for gas boiler water further comprises: a cooler;

the cooler is arranged on the first sewage drain pipe;

the cooler is used for cooling the water discharged from the gas-fired boiler to the filtering pool.

3. The automatic blowdown control system for gas boiler water according to claim 2, further comprising: a first stop valve and two second stop valves;

the first stop valve is arranged at the joint of the cooler and the first sewage drain pipe; the two second stop valves are respectively arranged on the second sewage pipes at the two ends of the first electric regulating valve.

4. The automatic blowdown control system for gas boiler water as claimed in claim 3, wherein said automatic blowdown control system for gas boiler water further comprises: branch sewage pipes and branch regulating valves;

the two ends of the branch sewage drain pipe are respectively communicated with the two ends of a target section pipeline on the second sewage drain pipe, and the target section pipeline comprises two second stop valves and a second sewage drain pipe in the middle of the second stop valves;

the branch regulating valve is arranged on the branch sewage drain pipe.

5. The automatic blowdown control system for gas boiler water according to claim 1, wherein the conductivity probe is arranged at the upper end of the filtering pool;

the water inlet of the filter tank is positioned at the lower end of the filter tank, and the water outlet of the filter tank is positioned at the upper end of the filter tank.

6. The automatic blowdown control system method for gas boiler water according to claim 5, wherein the number of the conductivity probes is plural;

the conductivity probes are respectively arranged at different positions of different heights of the filtering pool.

7. The automatic boiler water blowdown control system of claim 1, wherein the first blowdown pipe and the second blowdown pipe are stainless steel.

8. A method for controlling automatic blowdown of water in a gas boiler, characterized by being applied to a control device in the automatic blowdown control system of water in a gas boiler according to any one of claims 1 to 7, the method comprising:

acquiring the conductivity monitored by a conductivity probe;

obtaining a target conductivity difference value based on the conductivity monitored by the conductivity probe and a preset conductivity;

and controlling the opening degree of the first electric regulating valve by using the PID control method with the minimum target conductivity difference as a target so as to regulate the flow of the discharged furnace water of the gas boiler into the continuous-discharge expansion vessel.

9. A control apparatus comprising: a processor and a memory, wherein the memory stores a computer program which can be run on the processor, and the automatic pollution discharge control method for the gas boiler water according to claim 8 is realized when the processor executes the computer program.

10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the automatic pollution discharge control method for gas boiler water according to claim 8.