A high-parameter unsaturated water production device and method

Abstract

This application relates to the technical field of unsaturated water production, specifically disclosing a high-parameter unsaturated water production device, including a container one and a container two, connected by a connecting pipe. Container one is externally connected to a first steam pipe, and container two is externally connected to a second steam pipe. Container two is connected to an exhaust pipe and an external test pipe for installing a test valve. A high-parameter unsaturated water production method is also disclosed, specifically including the following steps: Step 1: Injecting a certain amount of saturated water into container one and container two respectively; Step 2: Introducing steam into container one and container two respectively, stabilizing the internal pressure of container one to P1, at which point the internal temperature of container one stabilizes to T1, allowing saturated water to fill container two, and stabilizing the internal pressure of container two to P2; Step 3: Connecting container one and container two; Step 4: Passing the medium in container two through the test valve. This application can produce high-temperature, high-pressure unsaturated water for unsaturated water testing of large-diameter valves.

Description

Technical Field

[0001] This application relates to the technical field of unsaturated water production, and in particular to a high-parameter unsaturated water production apparatus and method. Background Technology

[0002] To improve valve reliability, it is necessary to conduct unsaturated water tests on valves at a scale of one-to-one or on prototypes to simulate actual operating conditions. Currently, almost no laboratory can simultaneously achieve unsaturated water conditions for valves under high pressure (P>10MPa), high temperature (T>300℃), and large flow rate (Q=200~2000t / h). In order to meet the requirements of high temperature and high pressure for valves, as well as the unsaturated water test requirements for large-diameter valves, there is an urgent need for an unsaturated water test system that can achieve high temperature, high pressure, and large-diameter unsaturated water testing for valves. Summary of the Invention

[0003] The purpose of this application is to provide a high-parameter unsaturated water production device and method, which can produce high-temperature and high-pressure unsaturated water for unsaturated water testing of large-diameter valves.

[0004] Firstly, the high-parameter unsaturated water production device provided in this application adopts the following technical solution:

[0005] A high-parameter unsaturated water production device, characterized in that it includes a container one and a container two, both of which are equipped with temperature sensors, and a controllable on / off connecting pipe between the container one and the container two. The container one is externally connected to a controllable first steam pipe, the container two is externally connected to a controllable second steam pipe, the container two is connected to a controllable exhaust pipe, and the container two is externally connected to a test pipe for installing a test valve.

[0006] By adopting the above technical solution, a certain amount of saturated water is first injected into container one and container two, and then steam is introduced into container one and container two to increase the pressure inside the two containers. When the pressure value inside container one reaches P1, the temperature inside container one is a constant value T1. At the same time, the water level inside container two is adjusted to 100% using steam. At this time, the pressure value inside container two is P2, and the corresponding temperature inside container two is a constant value T2.

[0007] Subsequently, containers one and two are connected. The saturated water in containers one and two meet in the connecting pipe, and the water pressure in container two begins to increase. Because the convective heat transfer rate between the saturated water in the two containers is much lower than the pressure transfer rate, the pressure increase rate in container two is much higher than the temperature increase rate. Therefore, when the pressure in container two rises to P3, which is between P1 and P2 and close to P1, the temperature in container two is T3, which is between T1 and T2 and close to T2. At this point, the medium in container two is unsaturated water. Then, the test valve is opened, and the unsaturated water flows through the test valve, allowing the relevant parameters of the test valve to be tested. This allows for the preparation of high-temperature, high-pressure unsaturated water for unsaturated water testing of large-diameter valves.

[0008] Optionally, the first steam pipe enters from the bottom of container one, and the steam is ejected in the upward direction; the second steam pipe also enters from the bottom of container two, and the steam is ejected in the upward direction.

[0009] By adopting the above technical solution, it is possible to fix the steam pipe inside the container, and at the same time, avoid the noise caused by the steam hitting the wall during injection.

[0010] Optionally, it also includes a steam main pipe connected to the steam generating equipment, the steam main pipe being connected to the first steam pipe and the second steam pipe respectively.

[0011] By adopting the above technical solution and setting up a steam main pipe, it is convenient to efficiently and quickly introduce steam into container one and container two respectively.

[0012] Optionally, a first control valve for controlling on / off is installed on the connecting pipe, a first steam control valve for controlling on / off is installed on the first steam pipe, a second steam control valve for controlling on / off is installed on the second steam pipe, and an exhaust valve is installed on the exhaust pipe.

[0013] By adopting the above technical solution and setting the above valves, it is convenient to control the opening and closing of each pipeline.

[0014] Optionally, the first control valve, the first steam control valve, the second steam control valve, and the exhaust valve are all pneumatic valves.

[0015] By adopting the above technical solutions, pneumatic valves have the characteristics of fast action speed and can achieve better process control quality.

[0016] Optionally, the container may be a heat accumulator.

[0017] By adopting the above technical solution, the heat accumulator has a good heat preservation effect, which makes it easy to maintain the temperature of the medium inside the container.

[0018] Secondly, the high-parameter unsaturated water production method provided in this application adopts the following technical solution:

[0019] A method for producing unsaturated water specifically includes the following steps:

[0020] Step 1: Pour a certain amount of saturated water into both container one and container two;

[0021] Step 2: Steam is introduced into container 1 and container 2 respectively, and the internal pressure of container 1 is stabilized to P1. At this time, the internal temperature of container 1 is stabilized to T1. Container 2 is filled with saturated water and the internal pressure of container 2 is stabilized to P2. At this time, the internal temperature of container 2 is stabilized to T2. Wherein, P1>P2, T1>T2.

[0022] Step 3: Connect container one and container two;

[0023] Step 4: Pass the medium in container two through the test valve.

[0024] By adopting the above technical solution, the convective heat transfer rate between saturated water in the container is much lower than the pressure transfer rate, so that the pressure rise rate in container two is much higher than the temperature rise rate, which can produce high-temperature and high-pressure unsaturated water for unsaturated water testing of large-diameter valves.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By injecting a certain amount of saturated water into containers one and two, and then introducing steam into containers one and two to increase the pressure inside the two containers, when the pressure value in container one reaches P1, the temperature inside container one is a constant value T1; simultaneously, the water level in container two is adjusted to 100% using steam, at which point the pressure value in container two is P2, and correspondingly, the temperature inside container two is a constant value T2; then, containers one and two are connected, and the saturated water in containers one and two meet in the connecting pipe, and the water pressure in container two begins to increase. Since the convective heat transfer rate between the saturated water in the two containers is much lower than the pressure transfer rate, the pressure rise rate in container two is much higher than the temperature rise rate. In this way, high-temperature and high-pressure unsaturated water can be produced for unsaturated water testing of large-diameter valves.

[0027] 2. By using pneumatic valves for the first control valve, the first steam control valve, the second steam control valve, and the exhaust valve, the pneumatic valves can achieve better process control quality due to their fast operating speed. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0029] In the diagram, 1. Container 1; 2. Container 2; 3. Connecting pipe; 31. First control valve; 4. First steam pipe; 41. First steam control valve; 5. Second steam pipe; 51. Second steam control valve; 6. Test pipe; 7. Exhaust pipe; 71. Exhaust valve; 8. Steam main pipe. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1 This application will be described in further detail below.

[0031] Example:

[0032] A high-parameter unsaturated water production device is applied in a valve testing system. It is mainly used to produce high-temperature, high-pressure unsaturated water, which is then introduced into large-diameter valves to detect relevant valve parameters during the flow of this medium. The following detailed description, in conjunction with the accompanying drawings, further illustrates this application. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] Reference Figure 1 A high-parameter unsaturated water production device includes a first container 1 and a second container 2, connected by a connecting pipe 3. A first control valve 31 is installed on the connecting pipe 3 to control its on / off state. Temperature sensors are installed on both containers 1 and 2. In this embodiment, container 1 is a heat accumulator, and container 2 is a hot water container. Container 2 is externally connected to a test pipe 6, on which a test valve is installed. This test valve is the valve in the valve testing system that needs to be tested for high-temperature, high-pressure unsaturated water.

[0034] Meanwhile, container 1 is externally connected to a first steam pipe 4, which is used to introduce steam into container 1 to increase the pressure of the medium inside container 1, and a first steam control valve 41 is installed on the first steam pipe 4 to control its on / off state. Container 2 is externally connected to a second steam pipe 5, which is used to introduce steam into container 2 to increase the pressure of the medium inside container 2, and a second steam control valve 51 is installed on the second steam pipe 5 to control its on / off state.

[0035] To facilitate the adjustment of the medium pressure parameters inside container 2, an exhaust pipe 7 is connected to the top of container 2. An exhaust valve 71 is installed on the exhaust pipe 7 to control the opening and closing of the exhaust pipe 7. The exhaust pipe 7 is used to discharge air or steam from container 2. In conjunction with the second steam control valve 51, container 2 is filled with hot water, and the medium pressure inside container 2 is controlled. Through the cooperation of the second steam control valve 51 and the exhaust valve 71, the medium pressure inside container 2 can be adjusted to achieve the required medium pressure.

[0036] Preferably, the first control valve 31, the first steam control valve 41, the second steam control valve 51 and the exhaust valve 71 are all pneumatic valves. Pneumatic valves have the advantage of fast valve action speed and can achieve better process control quality.

[0037] Based on the characteristic that the saturation parameters of water, pressure and temperature, are single-valued, meaning that when one parameter changes, the other parameter must also change, the unsaturated water production device is adjusted to produce unsaturated water.

[0038] The specific adjustment method is as follows: First, the first steam control valve 41, the second steam control valve 51, the first control valve 31, and the test valve are closed, while only the exhaust valve 71 is open. Then, a certain amount of saturated water is injected into container 1 and container 2. Then, the first steam control valve 41 and the second steam control valve 51 are opened to introduce steam into container 1 and container 2 to increase the pressure inside the two containers and raise the liquid level inside the containers. When the pressure value inside container 1 reaches P1, the first steam control valve 41 is closed. At this time, the temperature inside container 1 is a constant value T1. Simultaneously, the exhaust valve 71 and the second steam control valve 51 are adjusted to adjust the water level inside container 2 to 100%. At this time, the pressure value inside container 2 is P2, and correspondingly, the temperature inside container 2 is a constant value T2. Here, it is necessary to satisfy P1 > P2, and under this condition, T1 > T2, that is, the pressure and temperature inside container 1 are both greater than the pressure and temperature inside container 2.

[0039] Then, the first control valve 31 is opened. At the instant the valve opens, the saturated water in containers 1 and 2 simultaneously flows into the connecting pipe 3 and meets. Since container 2 is filled with water, and the media in both containers 1 and 2 are saturated water, the water in container 2 cannot be compressed, causing the water pressure in container 2 to increase. Because the convective heat transfer rate between the saturated water in the two containers is much lower than the pressure transfer rate, the pressure increase rate in container 2 is much higher than the temperature increase rate. Therefore, when the pressure in container 2 rises to P3 (where P3 is between P1 and P2, and close to P1), the temperature in container 2 is T3 (where T3 is between T1 and T2, and close to T2). At this point, the medium in container 2 is unsaturated water. Then, the test valve is opened, and the unsaturated water flows through the test valve, allowing the relevant parameters of the test valve to be tested.

[0040] Furthermore, to facilitate the introduction of steam, the first steam pipe 4 and the second steam pipe 5 are connected to the steam main pipe 8 as branch pipes. The steam main pipe 8 can be connected to steam generating equipment such as boilers to ensure that steam can enter the two branch pipes through the steam main pipe 8.

[0041] To facilitate the installation of the first steam pipe 4 and the second steam pipe 5, the first steam pipe 4 is inserted horizontally from the bottom of container 1, and the steam is ejected upwards; similarly, the second steam pipe 5 is also inserted horizontally from the bottom of container 2, and the steam is ejected upwards.

[0042] This application also discloses a method for producing high-parameter unsaturated water, which specifically includes the following steps:

[0043] Step 1: Inject a certain amount of saturated water into both container 1 and container 2. The amount of medium injected into container 1 shall be approximately 2 / 3 of its capacity, and the amount of medium injected into container 2 shall be approximately 3 / 4 of its capacity. The saturated water injected here shall be saturated water at room temperature. In the specific operation, the appropriate initial water level shall be determined according to the steam heat source capacity, and the upper limit control measures of the water level shall be considered.

[0044] Step 2: Steam is introduced into both container 1 and container 2 to increase the pressure and level of the medium inside them. The steam is used to stabilize the pressure inside container 1 to P1, at which point the temperature inside container 1 stabilizes to T1, and the liquid level rises to 3 / 4 of the capacity of container 1. The steam is then used to adjust the liquid level inside container 2, so that saturated water fills container 2. When container 2 is full, the pressure inside it stabilizes to P2, and the temperature inside it stabilizes to T2. Here, P1 > P2, and T1 > T2.

[0045] Step 3: Connect container 1 and container 2. Since container 2 is filled with water, and the medium in both containers 1 and 2 is saturated water, the water in container 2 cannot be compressed, which causes the water pressure in container 2 to increase. Since the convective heat transfer rate between the two saturated water containers is much lower than the pressure transfer rate, the pressure in container 2 increases much faster than the temperature increases.

[0046] Therefore, when the pressure inside container 2 rises to P3 (where P3 is between P1 and P2 and close to P1), the temperature inside container 2 is T3 (where T3 is between T1 and T2 and close to T2). At this time, the medium inside container 2 is unsaturated water.

[0047] Step 4: Pass the medium in container 2 through the test valve to detect the relevant parameters of the test valve when unsaturated water is introduced.

[0048] The implementation principle of this application embodiment is as follows:

[0049] First, a certain amount of saturated water is injected into container 1 and container 2. Then, steam is introduced into container 1 and container 2 to increase the pressure inside the two containers. When the pressure value inside container 1 reaches P1, the temperature inside container 1 is a constant value T1. Simultaneously, the exhaust valve 71 and the second steam control valve 51 are adjusted to adjust the water level inside container 2 to 100%. At this time, the pressure value inside container 2 is P2, and the corresponding temperature inside container 2 is a constant value T2.

[0050] Then, containers 1 and 2 are connected. The saturated water in containers 1 and 2 meets, and the water pressure in container 2 begins to increase. Because the convective heat transfer rate between the saturated water in the two containers is much lower than the pressure transfer rate, the pressure in container 2 increases much faster than the temperature. Therefore, when the pressure in container 2 rises to P3, which is between P1 and P2 and close to P1, the temperature in container 2 is T3, which is between T1 and T2 and close to T2. At this point, the medium in container 2 is unsaturated water. Then, the test valve is opened, and the unsaturated water flows through the test valve, allowing the relevant parameters of the test valve to be tested.

[0051] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for producing high-parameter unsaturated water, characterized in that, A high-parameter unsaturated water production device is employed, specifically including the following steps: Step 1: Pour a certain amount of saturated water into container one (1) and container two (2) respectively; the amount of medium injected into container one (1) is about 2 / 3 of the capacity of container one (1), and the amount of medium injected into container two (2) is about 3 / 4 of the capacity of container two (2); Step 2: Steam is introduced into container 1 (1) and container 2 (2) respectively. The steam stabilizes the internal pressure of container 1 (1) to P1. At this time, the temperature inside container 1 (1) stabilizes to T1, and the liquid level rises to 3 / 4 of the capacity of container 1 (1), so that saturated water fills container 2 (2). The internal pressure of container 2 (2) stabilizes to P2. At this time, the temperature inside container 2 (2) stabilizes to T2, where P1 > P2 and T1 > T2. Step 3: Connect container one (1) and container two (2); Step 4: Pass the medium in container two (2) through the test valve; A high-parameter unsaturated water production device includes a container (1) and a container (2). Both containers (1) and (2) are equipped with temperature sensors. A controllable connection pipe (3) connects containers (1) and (2). A controllable first steam pipe (4) is connected to the container (1). The first steam pipe (4) enters from the bottom of container (1) and sprays upward. A controllable second steam pipe (5) is connected to the container (2). The second steam pipe (5) enters from the bottom of container (2) and sprays upward. Container (2) is pressure regulated by an exhaust pipe (7) when filled with saturated water. A controllable exhaust pipe (7) is connected to container (2). A test pipe (6) for installing a test valve is connected to the container (2). When the device is in use, the pressure P1 in container (1) is greater than the pressure P2 in container (2), and the temperature T1 in container (1) is greater than the pressure P2 in container (2). The temperature T2 in container two is greater than that in container two. When the pressure inside container two rises to P3, where P3 is between P1 and P2 and close to P1, the temperature inside container two is T3, where T3 is between T1 and T2 and close to T2; high-parameter unsaturated water is formed inside container two.

2. The method of claim 1, wherein the high parameter unsaturated water production method is characterized by, It also includes a steam main pipe (8) connected to a steam generating device, the steam main pipe (8) being connected to a first steam pipe (4) and a second steam pipe (5) respectively.

3. The method of claim 1, wherein the high parameter unsaturated water production method is characterized by, The connecting pipe (3) is equipped with a first control valve (31) for controlling the on and off, the first steam pipe (4) is equipped with a first steam control valve (41) for controlling the on and off, the second steam pipe (5) is equipped with a second steam control valve (51) for controlling the on and off, and the exhaust pipe (7) is equipped with an exhaust valve (71).

4. The method of claim 3, wherein the high parameter unsaturated water production method is characterized by, The first control valve (31), the first steam control valve (41), the second steam control valve (51) and the exhaust valve (71) are all pneumatic valves.

5. The method of claim 1, wherein the high parameter unsaturated water production method is characterized by, The container (1) is selected as a heat storage device.

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