A water feed recirculation gas turbine waste heat boiler acid dew point regulation system and method

Abstract

The application discloses a kind of water supply recirculation gas turbine waste heat boiler acid dew point regulating system and method, and the application relates to the adjustment field of boiler acid dew point, including main control unit, the main control unit includes sampling pipeline, sampling pipeline is electrically connected with monitoring unit, data receiving module is electrically connected with computing module, computing module is electrically connected with threshold comparison module, threshold comparison module is electrically connected with circulating temperature regulating unit, circulating temperature regulating unit is electrically connected with water supply monitoring unit, water supply monitoring unit is electrically connected with analysis module, and analysis module is electrically connected with warning module.The water supply recirculation gas turbine waste heat boiler acid dew point regulating system and method of the application, this system can test gas composition in real time and calculate waste heat boiler flue gas acid dew point, based on this, condensate water and water supply recirculation temperature can be adjusted, so as to reduce the exhaust gas temperature, and also reduce the phenomenon of pipe explosion caused by gas turbine waste heat boiler corrosion.

Description

Technical Field

[0001] This invention relates to the field of boiler acid dew point regulation, and particularly to an acid dew point regulation system and method for a gas turbine waste heat boiler with feedwater recirculation. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. The original meaning of "boiler" refers to a water-filled container heated over a fire, while "furnace" refers to the place where fuel is burned. A boiler consists of two main parts: the boiler and the furnace. The hot water or steam produced in a boiler can directly provide the heat energy needed for industrial production and people's lives. It can also be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. Boilers that provide hot water are called hot water boilers, which are mainly used for domestic purposes, with some applications in industrial production. Boilers that produce steam are called steam boilers, often simply referred to as boilers, and are mostly used in thermal power plants, ships, locomotives, and industrial and mining enterprises.

[0003] Currently, with some units burning high-sulfur gas and their operating years increasing, some gas turbine waste heat boilers are experiencing the following problems: the resistance of the waste heat boiler is increasing year by year, from the design value of 3000Pa to 4500Pa~5000Pa, which can lead to problems such as tube rupture on the heating surface, and will also affect the operating efficiency.

[0004] Therefore, it is necessary to propose a system and method for adjusting the acid dew point of a gas turbine waste heat boiler with feedwater recirculation to solve the above problems. Summary of the Invention

[0005] The main objective of this invention is to provide an acid dew point adjustment system and method for a gas turbine waste heat boiler with feedwater recirculation, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A gas turbine waste heat boiler acid dew point regulation system with feedwater recirculation includes a main control unit. The main control unit includes a sampling pipeline, which is electrically connected to a monitoring unit. The monitoring unit is electrically connected to a data receiving module, which is electrically connected to a calculation module. The calculation module is electrically connected to a threshold comparison module, which is electrically connected to a circulating temperature regulation unit. The circulating temperature regulation unit is electrically connected to a feedwater monitoring unit, which is electrically connected to an analysis module. The analysis module is electrically connected to a warning module.

[0007] Preferably, the sampling pipeline includes an asbestos filter pipeline, and the monitoring unit includes a temperature sensor, a flue gas information acquisition probe, a water temperature sensor, a component analysis module, a chromatograph, a pressure sensor, and a pH meter. The output end of the sampling pipeline is electrically connected to the input end of the monitoring unit.

[0008] Preferably, the output terminals of the flue gas information acquisition probe and the chromatograph are electrically connected to the input terminal of the component analysis module, and the temperature sensor, flue gas information acquisition probe, water temperature sensor, component analysis module, chromatograph, pressure sensor and pH meter are all installed inside the asbestos filter pipeline.

[0009] Preferably, the output terminal of the monitoring unit is electrically connected to the input terminal of the data receiving module, the output terminal of the data receiving module is electrically connected to the input terminal of the calculation module, the output terminal of the calculation module is electrically connected to the input terminal of the threshold comparison module, and the output terminal of the threshold comparison module is electrically connected to the input terminal of the circulating temperature adjustment unit.

[0010] Preferably, the circulating temperature regulating unit includes a heat exchanger control unit, the output of which is electrically connected to the input of the inlet water delivery pipe, the output of which is electrically connected to the input of the cold source equipment control unit, and the output of which is electrically connected to the input of the cold medium circulation delivery pipe.

[0011] Preferably, the cold source equipment control unit includes a first flow control module and a first temperature control module, wherein the first flow control module controls the flow valve inside the cold source equipment, and the first temperature control module controls the rise and fall of the temperature inside the cold source equipment.

[0012] Preferably, the heat exchanger control unit includes a second flow control module and a second temperature control module. The second flow control module controls the flow valves inside the heat exchanger, and the second temperature control module controls the rise and fall of the temperature inside the heat exchanger.

[0013] Preferably, the output terminal of the water supply monitoring unit is electrically connected to the input terminal of the analysis module, and the output terminal of the analysis module is electrically connected to the input terminal of the warning module. The water supply monitoring unit includes an automatic analyzer, which includes a TOC analyzer, a COD analyzer, a fluoride analyzer, a total phosphorus analyzer, an alkalinity analyzer, a nitrate analyzer, and a chlorine analyzer. The water supply monitoring unit is installed in the circulating water tank.

[0014] A method for regulating the acid dew point of a gas turbine waste heat boiler with feedwater recirculation, comprising the following steps: S1: Install sampling pipelines in the boiler's exhaust and circulating water pipelines. The sampling pipelines are equipped with asbestos filters. Install temperature sensors, flue gas information acquisition probes, chromatographs, pressure sensors, and component analysis modules in the exhaust pipelines. Install water temperature sensors and pH meters in the circulating water pipelines. S2: The monitoring unit will receive data from the temperature sensor, flue gas information acquisition probe, water temperature sensor, chromatograph, pressure sensor and pH meter. At this time, the chromatograph and flue gas information acquisition probe can collect information on the exhaust gas and calculate the acid dew point in conjunction with the temperature data from the temperature sensor and water temperature sensor. S3: After obtaining the acid dew point, the standard value is compared through the threshold comparison module to optimize the circulating temperature. The heat exchanger control unit controls the flow rate and temperature of the water inside the heat exchanger through the second flow control module and the second temperature control module, and inputs the treated water to the cold source equipment through the inlet water delivery pipe. The cold source equipment control unit continues to control the cold source equipment and further controls the flow rate and temperature to ensure the accuracy of the values. S4: Simultaneously, after the water tank receives circulating water, the water supply monitoring unit will monitor the water quality using TOC analyzer, COD analyzer, fluoride analyzer, total phosphorus analyzer, alkalinity analyzer, nitrate analyzer, and chloramine analyzer. After the analysis is completed, a warning can be issued based on the analysis results to remind staff to change the water.

[0015] Beneficial effects Compared with the prior art, the present invention provides an acid dew point adjustment system and method for a gas turbine waste heat boiler with feedwater recirculation, which has the following beneficial effects: 1. The acid dew point adjustment system and method for the gas turbine waste heat boiler with feedwater recirculation can monitor the state of the gas and liquid in the pipeline through the sampling pipeline and the monitoring unit, including monitoring the temperature, flue gas information, pressure and pH, so as to analyze its composition and use it to calculate the acid dew point.

[0016] 2. The acid dew point adjustment system and method for the gas turbine waste heat boiler with feedwater recirculation, through the set circulating temperature adjustment unit, can control the heat exchanger and cold source equipment, thereby controlling the flow and temperature. This can prevent the pipe bursting phenomenon and regulate the circulating water. It can reduce the flue gas temperature and improve the overall operating efficiency of the unit, and further reduce the occurrence of pipe bursting due to corrosion of the gas turbine waste heat boiler.

[0017] 3. The acid dew point adjustment system and method for the gas turbine waste heat boiler with water recirculation can monitor the circulating water in the water tank through the set water monitoring unit, which can prevent it from becoming acidic after long-term use. After detection, it is convenient to remind the staff to replace it, thereby further protecting the pipeline. Attached Figure Description

[0018] Figure 1 This is a system diagram of the main control unit of this invention; Figure 2 This is a system diagram of the cold source equipment control unit of the present invention; Figure 3 This is a system diagram of the heat exchanger control unit of the present invention; Figure 4 This is a system diagram of the monitoring unit of the present invention; Figure 5 This is a system diagram of the water supply monitoring unit of the present invention. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figure 1-5As shown, an acid dew point regulation system for a gas turbine waste heat boiler with feedwater recirculation includes a main control unit. The main control unit includes a sampling pipeline electrically connected to a monitoring unit. The monitoring unit is electrically connected to a data receiving module, which is electrically connected to a calculation module. The calculation module is electrically connected to a threshold comparison module, which is electrically connected to a circulating temperature regulation unit. The circulating temperature regulation unit is electrically connected to a feedwater monitoring unit, which is electrically connected to an analysis module. The analysis module is electrically connected to a warning module. The sampling pipeline includes an asbestos filter pipeline, and the monitoring unit includes a temperature sensor, a flue gas information acquisition probe, and a water... The temperature sensor, component analysis module, chromatograph, pressure sensor, and pH meter are all electrically connected. The output of the sampling pipeline is electrically connected to the input of the monitoring unit. The outputs of the flue gas information acquisition probe and the chromatograph are electrically connected to the input of the component analysis module. All components, including the temperature sensor, flue gas information acquisition probe, water temperature sensor, component analysis module, chromatograph, pressure sensor, and pH meter, are installed inside the asbestos filter pipeline. The output of the monitoring unit is electrically connected to the input of the data receiving module. The output of the data receiving module is electrically connected to the input of the calculation module. The output of the calculation module is connected to the threshold comparison module. The input terminal of the threshold comparison module is electrically connected to the input terminal of the circulating temperature regulation unit. The circulating temperature regulation unit includes a heat exchanger control unit. The output terminal of the heat exchanger control unit is electrically connected to the input terminal of the inlet water delivery pipe. The output terminal of the inlet water delivery pipe is electrically connected to the input terminal of the cold source equipment control unit. The output terminal of the cold source equipment control unit is electrically connected to the input terminal of the cold medium circulation delivery pipe. The cold source equipment control unit includes a first flow control module and a first temperature control module. The first flow control module controls the flow valve inside the cold source equipment, and the first temperature control module controls the temperature rise inside the cold source equipment. The heat exchanger control unit includes a second flow control module and a second temperature control module. The second flow control module controls the flow valves within the heat exchanger, and the second temperature control module controls the rise and fall of the temperature within the heat exchanger. The output of the feedwater monitoring unit is electrically connected to the input of the analysis module, and the output of the analysis module is electrically connected to the input of the warning module. The feedwater monitoring unit includes an automatic analyzer, which includes a TOC analyzer, a COD analyzer, a fluoride analyzer, a total phosphorus analyzer, an alkalinity analyzer, a nitrate analyzer, and a chlorine analyzer. The feedwater monitoring unit is installed in the circulating water tank.

[0021] The sampling pipeline allows for monitoring of the gas and liquid states within the pipeline, including temperature, flue gas information, pressure, and pH. This enables composition analysis and calculation of acid dew point. The circulating temperature control unit regulates heat exchangers and cooling equipment, controlling flow and temperature to prevent pipe bursts. It also regulates circulating water, reducing exhaust temperature and improving overall unit efficiency, further reducing the risk of pipe bursts due to corrosion from the waste heat boiler. The feedwater monitoring unit monitors the circulating water in the tank, preventing acidity after prolonged use and prompting staff for replacement, thus further protecting the pipeline.

[0022] A method for regulating the acid dew point of a gas turbine waste heat boiler with feedwater recirculation includes the following steps: S1: Install sampling pipelines in the boiler's exhaust and circulating water pipes. The sampling pipelines are equipped with asbestos filters. Install temperature sensors, flue gas information acquisition probes, chromatographs, pressure sensors, and component analysis modules in the exhaust pipes. Install water temperature sensors and pH meters in the circulating water pipes.

[0023] S2: The monitoring unit receives data from the temperature sensor, flue gas information acquisition probe, water temperature sensor, chromatograph, pressure sensor and pH meter. At this time, the chromatograph and flue gas information acquisition probe can collect information on the exhaust gas and calculate the acid dew point in conjunction with the temperature data from the temperature sensor and water temperature sensor.

[0024] S3: After obtaining the acid dew point, the standard value is compared through the threshold comparison module to optimize the circulating temperature. The heat exchanger control unit controls the flow rate and temperature of the water inside the heat exchanger through the second flow control module and the second temperature control module, and inputs the treated water to the cold source equipment through the inlet water delivery pipe. The cold source equipment control unit continues to control the cold source equipment and further controls the flow rate and temperature to ensure the accuracy of the values.

[0025] S4: Simultaneously, after the water tank receives circulating water, the water supply monitoring unit will monitor the water quality using TOC analyzer, COD analyzer, fluoride analyzer, total phosphorus analyzer, alkalinity analyzer, nitrate analyzer, and chloramine analyzer. After the analysis is completed, a warning can be issued based on the analysis results to remind staff to change the water.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A gas turbine waste heat boiler acid dew point regulation system with feedwater recirculation, comprising a main control unit, characterized in that: The main control unit includes a sampling pipeline, which is electrically connected to a monitoring unit. The monitoring unit is electrically connected to a data receiving module, which is electrically connected to a calculation module. The calculation module is electrically connected to a threshold comparison module, which is electrically connected to a circulating temperature control unit. The circulating temperature control unit is electrically connected to a water supply monitoring unit, which is electrically connected to an analysis module. The analysis module is electrically connected to a warning module. The sampling pipeline includes an asbestos filter pipeline, and the monitoring unit includes a temperature sensor, a flue gas information acquisition probe, a water temperature sensor, a component analysis module, a chromatograph, a pressure sensor, and a pH meter. The output end of the sampling pipeline is electrically connected to the input end of the monitoring unit. The output terminals of the flue gas information acquisition probe and the chromatograph are electrically connected to the input terminal of the component analysis module. The temperature sensor, flue gas information acquisition probe, water temperature sensor, component analysis module, chromatograph, pressure sensor and pH meter are all installed inside the asbestos filter pipeline. The output terminal of the monitoring unit is electrically connected to the input terminal of the data receiving module, the output terminal of the data receiving module is electrically connected to the input terminal of the calculation module, the output terminal of the calculation module is electrically connected to the input terminal of the threshold comparison module, and the output terminal of the threshold comparison module is electrically connected to the input terminal of the circulating temperature adjustment unit. The circulating temperature regulation unit includes a heat exchanger control unit, the output of which is electrically connected to the input of the inlet water delivery pipe, the output of which is electrically connected to the input of the cold source equipment control unit, and the output of which is electrically connected to the input of the cold medium circulation delivery pipe. The cold source equipment control unit includes a first flow control module and a first temperature control module. The first flow control module controls the flow valve inside the cold source equipment, and the first temperature control module controls the rise and fall of the temperature inside the cold source equipment. The heat exchanger control unit includes a second flow control module and a second temperature control module. The second flow control module controls the flow valve inside the heat exchanger, and the second temperature control module controls the rise and fall of the temperature inside the heat exchanger. The output terminal of the water supply monitoring unit is electrically connected to the input terminal of the analysis module, and the output terminal of the analysis module is electrically connected to the input terminal of the warning module. The water supply monitoring unit includes an automatic analyzer, which includes a TOC analyzer, a COD analyzer, a fluoride analyzer, a total phosphorus analyzer, an alkalinity analyzer, a nitrate analyzer, and a chloramine analyzer. The water supply monitoring unit is installed in the circulating water tank.

2. The method for adjusting the acid dew point of a gas turbine waste heat boiler with feedwater recirculation as described in claim 1, characterized in that: The following steps are included: S1: Install sampling pipelines in the boiler's exhaust and circulating water pipelines. The sampling pipelines are equipped with asbestos filters. Install temperature sensors, flue gas information acquisition probes, chromatographs, pressure sensors, and component analysis modules in the exhaust pipelines. Install water temperature sensors and pH meters in the circulating water pipelines. S2: The monitoring unit will receive data from the temperature sensor, flue gas information acquisition probe, water temperature sensor, chromatograph, pressure sensor and pH meter. At this time, the chromatograph and flue gas information acquisition probe can collect information on the exhaust gas and calculate the acid dew point in conjunction with the temperature data from the temperature sensor and water temperature sensor. S3: After obtaining the acid dew point, the standard value is compared through the threshold comparison module to optimize the circulating temperature. The heat exchanger control unit controls the flow rate and temperature of the water inside the heat exchanger through the second flow control module and the second temperature control module, and inputs the treated water to the cold source equipment through the inlet water delivery pipe. The cold source equipment control unit continues to control the cold source equipment and further controls the flow rate and temperature to ensure the accuracy of the values. S4: Simultaneously, after the water tank receives circulating water, the water supply monitoring unit will monitor the water quality using TOC analyzer, COD analyzer, fluoride analyzer, total phosphorus analyzer, alkalinity analyzer, nitrate analyzer, and chlorine analyzer. After the analysis is completed, a warning will be issued based on the analysis results to remind staff to change the water.

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