Negative pressure vacuum steam-water pipeline medium sampling system

Abstract

The utility model provides a negative pressure vacuum steam-water pipeline medium sampling system, and belongs to the technical field of negative pressure vacuum steam exhaust sampling. The problems of complicated operation, inaccurate sampling and the like of negative-pressure vacuum steam exhaust sampling of an existing steam turbine are solved. Comprising a steam exhaust pipeline, a condenser and a pressure container, the steam exhaust pipeline is communicated with the condenser through a first pipeline, the pressure container is communicated with the steam exhaust pipeline through a third pipeline, the pressure container is communicated with the condenser through a second pipeline, and the pressure container is communicated with a chemical water sampling room through a fourth pipeline. The pressure container is further connected with a pipeline communicated with the atmosphere, a vacuum breaking valve is arranged on the pipeline communicated with the atmosphere, vacuum valves are arranged on the first pipeline, the second pipeline and the third pipeline respectively, and an electric stop valve is arranged on the fourth pipeline. The sampling device is applied to sampling on the negative-pressure steam exhaust pipeline of the steam turbine.

Description

Technical Field

[0001] This invention provides a negative pressure vacuum steam-water pipeline medium sampling system, belonging to the field of negative pressure vacuum exhaust steam sampling technology. Background Technology

[0002] During steam turbine operation, the exhaust pipe is typically under negative pressure, making it easy for impurities to be introduced into the exhaust steam during its flow. To ensure boiler operating efficiency and various quality parameters, exhaust steam sampling and analysis are necessary. Existing exhaust steam sampling methods include direct insertion and vacuum extraction.

[0003] However, existing negative pressure vacuum exhaust steam sampling methods suffer from problems such as complex operation and inaccurate sampling. Therefore, developing a simple and effective steam turbine exhaust steam sampling system and its operation procedure is of great significance. Utility Model Content

[0004] To address the problems of complex operation and inaccurate sampling in existing negative pressure vacuum exhaust steam sampling of steam turbines, this utility model proposes a negative pressure vacuum steam-water pipeline medium sampling system. By connecting a pressure vessel to the outside of the steam pipeline, the condensate from the condenser flows into the pressure vessel by gravity, thereby realizing the sampling of exhaust steam in the negative pressure vacuum pipeline.

[0005] The technical solution adopted by this utility model is as follows: a negative pressure vacuum steam-water pipeline medium sampling system, including an exhaust pipe and a condenser, the exhaust pipe and the condenser are connected by a first pipe, and a pressure vessel is also included. The pressure vessel is connected to the exhaust pipe by a third pipe, the pressure vessel and the condenser are connected by a second pipe, and the pressure vessel is connected to the chemical water sampling station by a fourth pipe. The pressure vessel is also connected to a pipe connected to the atmosphere, and a vacuum breaking valve is installed on the pipe connected to the atmosphere. Vacuum valves are respectively installed on the first, second, and third pipes, and an electric shut-off valve is installed on the fourth pipe.

[0006] Furthermore, in the initial state of the system, the vacuum breaker valve, the electric shut-off valve, and all vacuum valves are in the closed state.

[0007] Furthermore, the exhaust pipe is a negative pressure steam pipe connected to the steam turbine.

[0008] Furthermore, when the vacuum valve on the third pipeline is opened, the pressure inside the pressure vessel is the same as the pressure inside the exhaust pipe, and the condensate in the condenser flows into the pressure vessel under the action of gravity.

[0009] Furthermore, the condenser is connected to a circulating water supply circuit and a circulating water return circuit.

[0010] Furthermore, the pressure vessel employs a heat exchanger capable of withstanding the pressure within the negative pressure vacuum pipeline of the steam turbine.

[0011] The advantages of this invention compared to existing technologies are as follows: This invention provides a simple and convenient system that can condense exhaust steam in the negative pressure pipeline of a steam turbine into water after heat exchange, enabling condensate sampling and testing, thus improving testing efficiency. Furthermore, it lowers the condensate temperature, ensuring the efficient operation of the post-condenser fine treatment unit, improving feedwater quality, reducing equipment investment, and lowering operating costs. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] In the diagram: 1 is the first pipeline, 2 is the first vacuum valve, 3 is the condenser, 4 is the second vacuum valve, 5 is the exhaust pipeline, 6 is the vacuum breaker valve, 7 is the third vacuum valve, 8 is the pressure vessel, 9 is the electric shut-off valve, 10 is the second pipeline, 11 is the third pipeline, and 12 is the fourth pipeline. Detailed Implementation

[0015] like Figure 1 As shown, this utility model provides a negative pressure vacuum steam-water pipeline medium sampling system, which can detect the quality of exhaust steam condensate, improve the quality of boiler feed water, and thus improve the subsequent boiler thermal efficiency. It includes an exhaust steam pipeline 5, a condenser 3, a pressure vessel 8, and valve and pipeline assemblies. The exhaust steam pipeline 5 is connected to the condenser 3 via a first pipeline 1, and the exhaust steam pipeline 5 is connected to the pressure vessel 8 via a third pipeline 11, used to ensure that the pressure inside the pressure vessel 8 is consistent with the pressure in the exhaust steam pipeline 5, thereby allowing water to flow into the pressure vessel 8 under gravity. The condenser 3 is connected to the pressure vessel 8 via a second pipeline 10. A first vacuum valve 2 is installed on the first pipeline 1 to control the flow of exhaust steam into the condenser 3, where the condenser 3 condenses the exhaust steam into water after heat exchange. A second vacuum valve 4 is installed on the second pipeline 10, and a third vacuum valve 7 is installed on the third pipeline 11.

[0016] The pressure vessel 8 is also connected to a pipe that communicates with the atmosphere and a fourth pipe 12. A vacuum breaker valve 6 is installed on the pipe that communicates with the atmosphere, and an electric shut-off valve 9 is installed on the fourth pipe 12. The pressure vessel 8 is connected to the chemical water sampling room through the fourth pipe 12.

[0017] The principle of this invention is as follows: In actual operation, all valves are first closed to ensure the system is in its initial state. Then, the first vacuum valve 2 between the exhaust pipe 5 and the condenser 3 is opened, allowing the exhaust steam to enter the condenser 3 for heat exchange and condensation. Simultaneously, the second vacuum valve 4 and the third vacuum valve 7 are opened, making the pressure vessel 8 and the condenser 3 have the same pressure. At this time, the condensate can flow to the pressure vessel 8 by gravity. After the water in the pressure vessel 8 accumulates to a certain level, the first vacuum valve 2, the second vacuum valve 4, and the third vacuum valve 7 are closed. At this time, the water in the pressure vessel 8 is the exhaust steam condensate to be sampled. Finally, the vacuum rupture valve 6 on the pressure vessel 8 is opened, connecting the pressure vessel 8 to the atmosphere, and the air pressure returns to normal. At this time, the water in the pressure vessel 8 can be sampled and analyzed to monitor various boiler qualities. Through the above implementation method, this invention achieves accurate sampling of turbine exhaust steam, and has the advantages of simple operation and accurate sampling.

[0018] Regarding the specific structure of this utility model, it should be noted that the connection relationships between the various component modules adopted in this utility model are definite and achievable. Except as specifically described in the embodiments, their specific connection relationships can bring about corresponding technical effects and solve the technical problems proposed by this utility model without relying on the execution of corresponding software programs. The models of the components, modules, and specific components appearing in this utility model, the connection methods between them, and the conventional usage methods and expected technical effects brought about by the above-mentioned technical features, unless specifically described, are all publicly disclosed content in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by those skilled in the art before the application date, or belong to conventional technology, common knowledge, and other existing technologies in this field. There is no need to elaborate, which makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain corresponding physical products based on this technical means.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A negative pressure vacuum steam-water pipeline medium sampling system, comprising an exhaust pipe (5) and a condenser (3), wherein the exhaust pipe (5) and the condenser (3) are connected by a first pipe (1), characterized in that: It also includes a pressure vessel (8), which is connected to the exhaust pipe (5) via a third pipe (11), and the pressure vessel (8) is connected to the condenser (3) via a second pipe (10). The pressure vessel (8) is connected to the chemical water sampling room via a fourth pipe (12). The pressure vessel (8) is also connected to a pipe that is connected to the atmosphere. A vacuum breaking valve (6) is installed on the pipe that is connected to the atmosphere. Vacuum valves are installed on the first pipe (1), the second pipe (10), and the third pipe (11), respectively. An electric shut-off valve (9) is installed on the fourth pipe (12).

2. The negative pressure vacuum steam-water pipeline medium sampling system according to claim 1, characterized in that: In the initial state of the system, the vacuum breaker valve (6), the electric shut-off valve (9), and all vacuum valves are in the closed state.

3. The negative pressure vacuum steam-water pipeline medium sampling system according to claim 1, characterized in that: The exhaust pipe (5) is a negative pressure steam pipe connected to the steam turbine.

4. The negative pressure vacuum steam-water pipeline medium sampling system according to claim 1, characterized in that: When the vacuum valve on the third pipe (11) is opened, the pressure inside the pressure vessel (8) is the same as the pressure inside the exhaust pipe (5), and the condensate in the condenser (3) flows into the pressure vessel (8) under the action of gravity.

5. A negative pressure vacuum steam-water pipeline medium sampling system according to claim 1, characterized in that: The condenser (3) is connected to a circulating water supply circuit and a circulating water return circuit.

6. A negative pressure vacuum steam-water pipeline medium sampling system according to claim 3, characterized in that: The pressure vessel (8) uses a heat exchanger that can withstand the pressure inside the negative pressure vacuum pipeline of the steam turbine.

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