CCPP unit new water gradient utilization system and method and related equipment

Abstract

The invention discloses a CCPP unit new water gradient utilization system and method and related equipment, relates to the field of comprehensive energy utilization, and mainly aims to solve the problems that a conventional water-saving mode of a current CCPP unit easily causes scaling of heat exchange equipment and influences operation safety. The system comprises a rear-mounted module, a front-mounted module and a rear-mounted module, wherein the rear-mounted module comprises a drainage pipe network; the circulating water drainage module is used for draining circulating water to the drainage pipe network; the coal gas cooling water replenishing module is connected to the circulating water drainage module and is used for circularly discharging the coal gas cooling water to the drainage pipe network; and the electric precipitation water replenishing module is connected to the circulating water drainage module and is used for circularly discharging water for electric precipitation to the drainage pipe network. The method is used for the CCPP unit new water gradient utilization process.

Description

Technical Field

[0001] The present invention relates to the field of comprehensive energy utilization, and in particular to a new water cascade utilization system and method for a CCPP unit and related equipment. Background Art

[0002] Compared with conventional thermal power units, CCPP units have the characteristics of fast start-up speed, strong peak-shaving capability, excellent environmental protection performance and low water consumption. In order to achieve efficient utilization of gas resources, CCPP units burning low calorific value gas have been widely used in steel enterprises.

[0003] However, in recent years, water resource control in northern China has become increasingly strict, and the water quota for enterprises has been decreasing year by year. Water is cut off when the quota is exceeded, but the normal production of enterprises is directly affected. Although the new water consumption of CCPP units is only about 50% of that of conventional thermal power units, it is still a large water consumer. The circulating water system, gas cooling water system, and wet electrostatic precipitator system of CCPP units are all new water. How to further reduce the new water consumption of the units is an urgent problem facing production. The method of increasing the concentration rate of circulating water can save water, but it will cause scaling of heat exchange equipment and affect the safe operation of the units. Summary of the invention

[0004] In view of the above problems, the present invention provides a new water cascade utilization system, method and related equipment for a CCPP unit, the main purpose of which is to solve the problem that the conventional water-saving method of the current CCPP unit is prone to cause scaling of the heat exchange equipment and affect the safe operation.

[0005] In order to solve at least one of the above technical problems, in a first aspect, the present invention provides a CCPP unit fresh water cascade utilization system, the system comprising:

[0006] A rear module, wherein the rear module includes a drainage network;

[0007] A circulating water drainage module, used for discharging circulating water to the drainage network;

[0008] A coal gas cooling water replenishment module, connected to the circulating water drainage module, for circulating the coal gas cooling water to the drainage network;

[0009] The electrostatic precipitator water replenishment module is connected to the circulating water drainage module and is used to circulate the water used for the electrostatic precipitator to the drainage network.

[0010] Optionally, the above system further includes:

[0011] The front module includes a new water production network, a circulating water replenishment pipe, a circulating water replenishment valve and a circulating water pool.

[0012] Optional,

[0013] The circulating water drainage module includes a circulating water drainage pipe and a circulating water drainage valve.

[0014] The circulating water drainage pipe is connected to the drainage pipe of the circulating water pool.

[0015] The circulating water drainage valve is connected to the drainage pipe network.

[0016] Optional,

[0017] The gas cooling water replenishment module includes a gas cooling water replenishment pipe, a gas cooling water replenishment valve, a gas cooling water replenishment filter, a gas cooling water pool, a gas cooling water pump, a gas cooling water plate heat exchanger, a gas cooler, a gas cooling water drain pipe and a gas cooling water drain valve.

[0018] The coal gas cooling water supply pipe is connected to the drainage pipe of the circulating water pool.

[0019] The gas cooling water drainage valve is connected to the drainage pipe network.

[0020] Optionally, the above system further includes:

[0021] The electrostatic precipitator water replenishment module includes an electrostatic precipitator water replenishment pipe, an electrostatic precipitator water replenishment valve, an electrostatic precipitator water replenishment filter, an electrostatic precipitator water tank, an electrostatic precipitator water supply pump, a wet electrostatic precipitator, an electrostatic precipitator drainage pipe and an electrostatic precipitator drainage valve.

[0022] The electrostatic precipitator water supply pipe is connected to the drainage pipe of the circulating water pool.

[0023] The electrostatic precipitator drainage valve is connected to the drainage network.

[0024] In a second aspect, an embodiment of the present invention further provides a method for cascade utilization of fresh water of a CCPP unit, comprising:

[0025] The circulating water drain pipe receives the circulating water discharged from the circulating water pool;

[0026] The circulating water is discharged into the drainage network through the circulating water drainage valve.

[0027] Optionally, the above method further includes:

[0028] The coal gas cooling water supply pipe receives the circulating water discharged from the circulating water pool;

[0029] The circulating water is fed into the coal gas cooling water pool through the coal gas cooling water replenishment valve and the coal gas cooling water replenishment filter;

[0030] Supplying the coal gas cooling water based on the coal gas cooling water pump;

[0031] supplying the coal gas cooling water to the coal gas cooler through a coal gas cooling water plate heat exchanger to return the coal gas cooling water to a coal gas cooling water pool;

[0032] The gas cooling water in the gas cooling water pool is discharged into the drainage network based on the gas cooling water drainage pipe and the gas cooling water drainage valve.

[0033] Optionally, the above method further includes:

[0034] The electrostatic precipitator water supply pipe receives the circulating water discharged from the circulating water pool;

[0035] The circulating water is replenished into the electrostatic precipitator water pool via the electrostatic precipitator water replenishment valve and the electrostatic precipitator water replenishment filter;

[0036] Based on the electrostatic precipitator water supply pump, the electrostatic precipitator water is returned to the electrostatic precipitator water tank after passing through the wet electrostatic precipitator;

[0037] Based on the electrostatic precipitator drainage pipe and the electrostatic precipitator drainage valve, the electrostatic precipitator water in the electrostatic precipitator water pool is discharged into the drainage network.

[0038] In order to achieve the above-mentioned purpose, according to the third aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium includes a stored program, wherein when the above-mentioned program is executed by a processor, the steps of the above-mentioned method for cascade utilization of new water for CCPP units are implemented.

[0039] In order to achieve the above-mentioned purpose, according to a fourth aspect of the present invention, there is provided an electronic device, comprising at least one processor and at least one memory connected to the processor; wherein the above-mentioned processor is used to call the program instructions in the above-mentioned memory to execute the steps of the above-mentioned CCPP unit new water cascade utilization method.

[0040] Through the above technical scheme, the CCPP unit new water cascade utilization system, method and related equipment provided by the present invention can solve the problem that the conventional water-saving method of the current CCPP unit is prone to scaling of the heat exchange equipment and affects the operation safety. The present invention uses a post-module, and the post-module includes a drainage network; a circulating water drainage module, which is used to discharge the circulating water to the drainage network; a gas cooling water replenishment module, which is connected to the circulating water drainage module, and is used to circulate and discharge the gas cooling water to the drainage network; an electrostatic precipitator replenishment module, which is connected to the circulating water drainage module, and is used to circulate and discharge the electrostatic precipitator water to the drainage network. In the above scheme, considering that the new water consumption of the low calorific value CCPP unit mainly includes three parts, one is the circulating water system replenishment, which is used to supplement the evaporation and sewage loss of the circulating water system; the second is the coal gas cooling water system replenishment, which is used to supplement the sewage loss of the coal gas cooling water system; the third is the wet electrostatic precipitator system replenishment, which is used to supplement the sewage loss of the electrostatic precipitator system. Among them, the circulating water system accounts for the largest proportion of water replenishment, and the sewage discharge of the circulating water system exceeds the sum of the sewage discharge of the gas cooling water system and the wet electrostatic precipitator system. Through the cascade utilization of new water in the circulating water system, the gas cooling water system and the wet electrostatic precipitator system, water saving and consumption reduction can be achieved.

[0041] Correspondingly, the CCPP unit new water cascade utilization device, equipment and computer-readable storage medium provided by the embodiments of the present invention also have the above-mentioned technical effects.

[0042] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 A schematic flow chart of a method for cascade utilization of fresh water of a CCPP unit provided by an embodiment of the present invention is shown;

[0045] Figure 2 A schematic block diagram of the composition of an electronic device for cascade utilization of fresh water for a CCPP unit provided by an embodiment of the present invention is shown;

[0046] Among them, there are new water pipeline network 1, circulating water make-up pipe 2, circulating water make-up valve 3, circulating water pool and circulating water system 4, circulating water drainage pipe 5, circulating water drainage valve 6, drainage pipeline network 7, gas cooling water make-up pipe 8, gas cooling water make-up valve 9, gas cooling water make-up filter 10, gas cooling water pool 11, gas cooling water drainage pipe 12, gas cooling water drainage valve 13, gas cooling water pump 14, gas cooling water plate heat exchanger 15, gas cooler 16, electrostatic precipitator make-up pipe 17, electrostatic precipitator make-up valve 18, electrostatic precipitator make-up filter 19, electrostatic precipitator pool 20, electrostatic precipitator drainage pipe 21, electrostatic precipitator drainage valve 22, electrostatic precipitator water supply pump 23, and wet electrostatic precipitator 24. DETAILED DESCRIPTION

[0047] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0048] In order to solve the problem that the conventional water-saving method of the current CCPP unit is prone to cause scaling of the heat exchange equipment and affect the operation safety, in order to solve at least one of the above technical problems, in the first aspect, the present invention provides a new water cascade utilization system for the CCPP unit, such as Figure 1 As shown, the system includes:

[0049] The rear module includes a drainage network 7; a circulating water drainage module, used to discharge the circulating water to the drainage network 7; a gas cooling water replenishment module, connected to the circulating water drainage module, used to circulate the gas cooling water to the drainage network 7; an electrostatic precipitator replenishment module, connected to the circulating water drainage module, used to circulate the electrostatic precipitator water to the drainage network 7.

[0050] This application takes into account that the circulating water system replenishment accounts for the largest proportion of new water consumption in low calorific value CCPP units, and the circulating water system discharge exceeds the sum of the gas cooling water system and the wet electrostatic precipitator system. Therefore, water conservation and consumption reduction are achieved through the cascade utilization of new water in the circulating water system, gas cooling water system, and wet electrostatic precipitator system.

[0051] The above scheme accurately locates the different functional requirements of water use in different systems, and uses the drainage of the circulating water system instead of new water as the replenishment water for the gas cooling water system and the electrostatic precipitator water system, thereby greatly reducing the consumption of new water. While meeting the functions of each water system, it does not increase the concentration rate of circulating water, thus avoiding the impact of heat exchanger scaling on the safe operation of the unit.

[0052] Furthermore, considering that the operating environment of the gas cooling water system is suitable for the growth of microorganisms, the plate heat exchanger equipped in the system is prone to fouling and clogging, which affects the gas cooling water supply and needs to be cleaned once a quarter, which is time-consuming and labor-intensive and affects the normal operation of the unit. Based on the above scheme, the chemical agents added to the circulating water system can be used to break the microbial breeding environment of the gas cooling water system, solve the fouling problem of the gas cooling water plate heat exchanger 15, avoid the increase in operation and maintenance costs caused by frequent cleaning of the heat exchanger, and improve the operating reliability of the unit.

[0053] In one embodiment, the system further includes: a front module, wherein the front module includes a new water production network 1, a circulating water replenishment pipe 2, a circulating water replenishment valve 3 and a circulating water pool.

[0054] Exemplarily, the new water production network 1 replenishes new water to the circulating water pool and the circulating water system 4 through the circulating water replenishment pipe 2 and the circulating water replenishment valve 3.

[0055] Specifically, the circulating water replenishment valve 3 is opened, and the new water from the new water network 1 is replenished into the circulating water pool and the circulating water system 4 through the circulating water replenishment pipe 2. The replenishment capacity of the circulating water system is about 3000t / day. In addition to the drift loss, in order to control the concentration ratio and avoid scaling, the sewage discharge of the circulating water system is about 2000t / day.

[0056] In one embodiment, the circulating water drainage module includes a circulating water drainage pipe 5 and a circulating water drainage valve 6 , the circulating water drainage pipe 5 is connected to the drainage pipe of the circulating water pool, and the circulating water drainage valve 6 is connected to the drainage network 7 .

[0057] The new water consumption of the low calorific value CCPP unit considered in this application includes water replenishment through the circulating water system to supplement the evaporation and sewage loss of the circulating water system, and is discharged into the drainage network 7 through the circulating water drainage pipe 5 and the circulating water drainage valve 6.

[0058] In one embodiment, the gas cooling water make-up module includes a gas cooling water make-up pipe 8, a gas cooling water make-up valve 9, a gas cooling water make-up filter 10, a gas cooling water pool 11, a gas cooling water pump 14, a gas cooling water plate heat exchanger 15, a gas cooler 16, a gas cooling water drain pipe 12 and a gas cooling water drain valve 13, the gas cooling water make-up pipe 8 is connected to the drain pipe of the circulating water pool, and the gas cooling water drain valve 13 is connected to the drainage network 7.

[0059] This application considers that the new water consumption of the low calorific value CCPP unit includes water replenishment of the gas cooling water system to supplement the sewage loss of the gas cooling water system. The gas cooling water replenishment pipe 8 is replenished into the gas cooling water pool 11 through the gas cooling water replenishment valve 9 and the gas cooling water replenishment filter 10. The gas cooling water is supplied by the gas cooling water pump 14, supplied into the gas cooler 16 through the gas cooling water plate heat exchanger 15 and then returned to the gas cooling water pool 11. The sewage of the gas cooling water system is discharged into the drainage network 7 through the gas cooling water drainage pipe 12 and the gas cooling water drainage valve 13.

[0060] Specifically, a part of the drainage of the circulating water system is replenished into the gas cooling water pool 11 through the gas cooling water replenishment pipe 8, the gas cooling water replenishment valve 9 and the gas cooling water replenishment filter 10 as gas cooling water. The gas cooling water is supplied by the gas cooling water pump 14, supplied into the gas cooler 16 through the gas cooling water plate heat exchanger 15 and then returned to the gas cooling water pool 11. The sewage of the gas cooling water system is discharged into the drainage network 7 through the gas cooling water drain pipe 12 and the gas cooling water drain valve 13. The sewage discharge of gas cooling water is about 1000t / day.

[0061] In one embodiment, the above-mentioned system also includes that the electrostatic precipitator water replenishment module includes an electrostatic precipitator water replenishment pipe 17, an electrostatic precipitator water replenishment valve 18, an electrostatic precipitator water replenishment filter 19, an electrostatic precipitator water pool 20, an electrostatic precipitator water supply pump 23, a wet electrostatic precipitator, an electrostatic precipitator drainage pipe 21 and an electrostatic precipitator drainage valve 22, the electrostatic precipitator water replenishment pipe 17 is connected to the drainage pipe of the circulating water pool, and the electrostatic precipitator drainage valve 22 is connected to the drainage network 7.

[0062] This application takes into account that the new water consumption of the low calorific value CCPP unit includes the water replenishment of the wet electrostatic precipitator system to supplement the sewage loss of the electrostatic precipitator system. Through the electrostatic precipitator water replenishment pipe 17, the electrostatic precipitator water replenishment valve 18, and the electrostatic precipitator water replenishment filter 19, the electrostatic precipitator water is replenished into the electrostatic precipitator water tank 20, and the electrostatic precipitator water is supplied by the electrostatic precipitator water supply pump 23, and returns to the electrostatic precipitator water tank 20 after the wet electrostatic precipitator. The sewage of the electrostatic precipitator system is discharged into the drainage network 7 through the electrostatic precipitator drainage pipe 21 and the electrostatic precipitator drainage valve 22.

[0063] Specifically, another part of the drainage of the circulating water system passes through the electrostatic precipitator water replenishment pipe 17, and is replenished into the electrostatic precipitator water pool 20 through the electrostatic precipitator water replenishment valve 18 and the electrostatic precipitator water replenishment filter 19 as water for electrostatic precipitator. The water for electrostatic precipitator is supplied by the electrostatic precipitator water supply pump 23, and returns to the electrostatic precipitator water pool 20 after wet electrostatic precipitator. The sewage of the electrostatic precipitator system is discharged into the drainage network 7 through the electrostatic precipitator drainage pipe 21 and the electrostatic precipitator drainage valve 22. The sewage discharge of the electrostatic precipitator system is about 500t / day.

[0064] In a second aspect, an embodiment of the present invention further provides a method for cascade utilization of fresh water of a CCPP unit, comprising:

[0065] The circulating water drainage pipe 5 receives the circulating water discharged from the circulating water pool; and discharges the circulating water into the drainage network 7 through the circulating water drainage valve 6 .

[0066] Based on the above solution, the circulating water is discharged into the drainage network 7 through the circulating water drainage pipe 5 and the circulating water drainage valve 6 .

[0067] In one embodiment, the method further includes: receiving circulating water discharged from the circulating water pool based on the gas cooling water make-up pipe 8; replenishing the circulating water into the gas cooling water pool 11 through the gas cooling water make-up valve 9 and the gas cooling water make-up filter 10; supplying the gas cooling water based on the gas cooling water pump 14; supplying the gas cooling water to the gas cooler 16 through the gas cooling water plate heat exchanger 15 to return the gas cooling water to the gas cooling water pool 11; and discharging the gas cooling water of the gas cooling water pool 11 into the drainage network 7 based on the gas cooling water drain pipe 12 and the gas cooling water drain valve 13.

[0068] Based on the above scheme, a part of the drainage of the circulating water system is controlled to be replenished into the gas cooling water pool 11 through the gas cooling water replenishment pipe 8, the gas cooling water replenishment valve 9 and the gas cooling water replenishment filter 10 as gas cooling water. The gas cooling water is supplied by the gas cooling water pump 14, supplied into the gas cooler 16 through the gas cooling water plate heat exchanger 15 and then returned to the gas cooling water pool 11. The sewage of the gas cooling water system is discharged into the drainage network 7 through the gas cooling water drainage pipe 12 and the gas cooling water drainage valve 13 to supplement the sewage loss of the gas cooling water system and reduce the consumption of new water.

[0069] In one embodiment, the method further includes: receiving circulating water discharged from the circulating water pool based on the electrostatic precipitator water replenishment pipe 17; replenishing the circulating water into the electrostatic precipitator water pool 20 via the electrostatic precipitator water replenishment valve 18 and the electrostatic precipitator water replenishment filter 19; returning the electrostatic precipitator water to the electrostatic precipitator water pool 20 after passing through the wet electrostatic precipitator based on the electrostatic precipitator water supply pump 23; and discharging the electrostatic precipitator water in the electrostatic precipitator water pool 20 into the drainage network 7 based on the electrostatic precipitator drainage pipe 21 and the electrostatic precipitator drainage valve 22.

[0070] Based on the above scheme, another part of the drainage of the circulating water system passes through the electrostatic precipitator water replenishment pipe 17, and is replenished into the electrostatic precipitator water tank 20 through the electrostatic precipitator water replenishment valve 18 and the electrostatic precipitator water replenishment filter 19 as water for electrostatic precipitator. The water for electrostatic precipitator is supplied by the electrostatic precipitator water supply pump 23, and returns to the electrostatic precipitator water tank 20 after wet electrostatic precipitator. The sewage of the electrostatic precipitator system is discharged into the drainage network 7 through the electrostatic precipitator drainage pipe 21 and the electrostatic precipitator drainage valve 22 to supplement the sewage loss of the electrostatic precipitator system and reduce the consumption of new water.

[0071] In summary, the daily fresh water consumption of the CCPP unit is reduced from about 4500t / day to about 3000t / day, which greatly reduces the fresh water consumption; on the other hand, the gas cooling water plate heat exchanger 15 cancels the regular cleaning once every quarter in daily operation, and only needs to be cleaned during the overhaul period of the unit, which greatly reduces the operation and maintenance costs and improves the operation reliability of the unit.

[0072] Based on the above scheme, the water demand of the CCPP unit's circulating water system, gas cooling water system, and electrostatic precipitator water system was reorganized, and the drainage of the circulating water system replaced the new water as the water replenishment of the gas cooling water system and the electrostatic precipitator water system. In addition to meeting the conventional gas cooling water cooling function and electrostatic precipitator water flushing function, the chemical agents added to the circulating water system were used to break the microbial breeding environment of the gas cooling water system and solve the problem of fouling and blockage of the gas cooling water plate heat exchanger 15. On the one hand, the downgraded replacement of water for the gas cooling water system and the electrostatic precipitator water system was achieved, greatly reducing the consumption of new water; on the other hand, the frequent cleaning of the coal cooling water heat exchanger was avoided, greatly reducing the operation and maintenance costs, and improving the unit's operating reliability.

[0073] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and a new water cascade utilization method for CCPP units can be implemented by adjusting kernel parameters, which can solve the problem that the conventional water-saving method of the current CCPP units is prone to scaling of heat exchange equipment and affects operation safety.

[0074] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium includes a stored program, and when the program is executed by a processor, the method for cascade utilization of fresh water of the CCPP unit is implemented.

[0075] An embodiment of the present invention provides a processor, which is used to run a program, wherein the program executes the CCPP unit fresh water cascade utilization method when running.

[0076] An embodiment of the present invention provides an electronic device, the electronic device comprising at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the above-mentioned CCPP unit fresh water cascade utilization method

[0077] An embodiment of the present invention provides an electronic device 30, such as Figure 2 As shown, the electronic device includes at least one processor 301, and at least one memory 302 and a bus 303 connected to the processor; wherein the processor 301 and the memory 302 communicate with each other through the bus 303; the processor 301 is used to call the program instructions in the memory to execute the above-mentioned CCPP unit new water cascade utilization method.

[0078] The intelligent electronic devices in this article can be PCs, PADs, mobile phones, etc.

[0079] The present application also provides a computer program product, which, when executed on a process management electronic device, is suitable for executing a program that initializes the steps of the above-mentioned CCPP unit new water cascade utilization method.

[0080] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0081] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0082] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0083] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0084] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0085] The present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device is caused to execute the following Figure 1 This corresponds to the flow of control of the memory in the embodiment.

[0086] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0087] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0088] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple 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.

[0090] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0092] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A CCPP unit fresh water cascade utilization system, characterized in that: include: A rear module, wherein the rear module includes a drainage network; A circulating water drainage module, used for discharging circulating water to the drainage network; A coal gas cooling water replenishment module, connected to the circulating water drainage module, for circulating the coal gas cooling water to the drainage network; The electrostatic precipitator water replenishment module is connected to the circulating water drainage module and is used to circulate the water used for the electrostatic precipitator to the drainage network.

2. The system according to claim 1, characterized in that Also includes: The front module includes a new water production network, a circulating water replenishment pipe, a circulating water replenishment valve and a circulating water pool.

3. The system according to claim 2, characterized in that The circulating water drainage module includes a circulating water drainage pipe and a circulating water drainage valve. The circulating water drainage pipe is connected to the drainage pipe of the circulating water pool. The circulating water drainage valve is connected to the drainage pipe network.

4. The system according to claim 3, characterized in that The gas cooling water replenishment module includes a gas cooling water replenishment pipe, a gas cooling water replenishment valve, a gas cooling water replenishment filter, a gas cooling water pool, a gas cooling water pump, a gas cooling water plate heat exchanger, a gas cooler, a gas cooling water drain pipe and a gas cooling water drain valve. The coal gas cooling water supply pipe is connected to the drainage pipe of the circulating water pool. The gas cooling water drainage valve is connected to the drainage pipe network.

5. The system according to claim 4, characterized in that The electrostatic precipitator water replenishment module includes an electrostatic precipitator water replenishment pipe, an electrostatic precipitator water replenishment valve, an electrostatic precipitator water replenishment filter, an electrostatic precipitator water tank, an electrostatic precipitator water supply pump, a wet electrostatic precipitator, an electrostatic precipitator drainage pipe and an electrostatic precipitator drainage valve. The electrostatic precipitator water supply pipe is connected to the drainage pipe of the circulating water pool. The electrostatic precipitator drainage valve is connected to the drainage network.

6. A method for cascade utilization of fresh water for a CCPP unit, used in the cascade utilization system for fresh water for a CCPP unit according to any one of claims 1 to 5, characterized in that: Also includes: The circulating water drain pipe receives the circulating water discharged from the circulating water pool; The circulating water is discharged into the drainage network through the circulating water drainage valve.

7. The method according to claim 6, characterized in that Also includes: The coal gas cooling water supply pipe receives the circulating water discharged from the circulating water pool; The circulating water is fed into the coal gas cooling water pool through the coal gas cooling water replenishment valve and the coal gas cooling water replenishment filter; Supplying the coal gas cooling water based on the coal gas cooling water pump; supplying the coal gas cooling water to the coal gas cooler through a coal gas cooling water plate heat exchanger to return the coal gas cooling water to the coal gas cooling water pool; The gas cooling water in the gas cooling water pool is discharged into the drainage network based on the gas cooling water drainage pipe and the gas cooling water drainage valve.

8. The method according to claim 7, characterized in that Also includes: The electrostatic precipitator water supply pipe receives the circulating water discharged from the circulating water pool; The circulating water is replenished into the electrostatic precipitator water pool via the electrostatic precipitator water replenishment valve and the electrostatic precipitator water replenishment filter; Based on the electrostatic precipitator water supply pump, the electrostatic precipitator water is returned to the electrostatic precipitator water tank after passing through the wet electrostatic precipitator; Based on the electrostatic precipitator drainage pipe and the electrostatic precipitator drainage valve, the electrostatic precipitator water in the electrostatic precipitator water pool is discharged into the drainage network.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed by a processor, the steps of the method for cascade utilization of new water for a CCPP unit according to any one of claims 1 to 7 are implemented.

10. An electronic device, characterized in that: The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the steps of the CCPP unit new water cascade utilization method as described in any one of claims 1 to 7.

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