Propane liquid collection gasification device based on LNG cold energy power generation
By designing a propane liquid-gasification device including a liquid collecting tank and a water bath gasifier next to it, the problem of damage caused by propane condensation entering the equipment when the turbine generator set is shut down is solved, and the installation height of the turbine generator set is reduced, investment costs are saved, and safe and efficient cold energy generation is achieved.
Patent Information
- Application Number
- CN202422201635.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-09-06
AI Technical Summary
During the shutdown of the turbine generator set, propane gas condenses into liquid on the low-temperature pipeline, causing the liquid to enter the high-speed rotating turbine and damage the equipment. In addition, the existing plan increases the turbine installation height to prevent condensation liquid from entering the gasifier, resulting in the factory becoming a high-rise building and increasing investment costs.
A propane liquid-gasification device based on LNG cooling power generation is designed, including a liquid-gasification tank and a water bath gasifier on the side. The liquid collecting tank collects the propane condensate produced by the turbine generator set when it is shut down and gasifies the condensate through a water bath vaporizer next to it. The device connects the bottom of the turbine generator set to the low point of the outlet pipe through a pipe, ensuring that the condensate flows into the liquid collector tank and is gasified.
On the premise of ensuring the safety of the equipment and not affecting the heat exchange efficiency of the split gasifier in the cold energy power generation device, the device reduces the installation height of the turbine generator set, saves investment costs, solves the problem that the unit cannot start and stop multiple times due to slow gasification of propane liquid, and avoids the risk of propane gas condensation into liquid at the low point of the pipeline, causing equipment damage.
Smart Images
Figure CN222977902U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquefied natural gas equipment, in particular to a propane liquid collection and gasification device based on LNG cold energy power generation. Background Technique
[0002] For a power generation device based on LNG cold energy utilization, during normal operation, the turbine generator set has a power generation mode and a bypass mode. In the bypass mode, the turbine is bypassed, and the inlet high-pressure gas is sent to the outlet of the turbine through a bypass pipeline. The pressure and temperature of the pipeline at the outlet of the turbine are relatively high; in the power generation mode, the high-pressure gas enters the turbine to expand and do work to reduce the pressure and then output. The pressure and temperature of the pipeline at the outlet of the turbine are relatively low. During the shutdown process of the turbine generator set, when switching from the power generation mode to the bypass mode, the pressure at the outlet of the turbine rises rapidly, and the propane gas in the low-temperature pipeline at the outlet is easily condensed into a liquid. If the liquid enters the turbine expander that is rotating at high speed, the equipment will be damaged.
[0003] To prevent the condensed liquid in the gas-phase circulating medium from entering the turbine, most of the existing solutions in use are to increase the installation height of the turbine, so that the condensed liquid flows into the vaporizer along the inclined pipeline. This solution is affected by the installation height of the vaporizer. The turbine generator set workshop needs to be higher than the vaporizer within a certain range, so that the workshop becomes a high-rise building. Affected by the geographical environment and climate, high-rise buildings have more complex requirements in terms of settlement, typhoon resistance, explosion protection, etc., and the investment cost increases significantly.
[0004] To avoid the workshop exceeding 24 meters and becoming a high-rise building, the installation height of the turbine generator set is reduced, resulting in a low point in the pipeline between the outlet of the turbine and the interface reserved for the split vaporizer. However, during the shutdown process of the unit, the gas-phase propane pressure at the outlet of the turbine generator set rises rapidly, and the high-pressure propane gas condenses into a liquid on the low-temperature pipe wall and deposits at the low point of the pipeline. If the liquid enters the turbine that is rotating at high speed, the equipment will be damaged. Content of the Utility Model
[0005] The purpose of the utility model is to provide a propane liquid collection and gasification device based on LNG cold energy power generation to solve at least one of the above technical problems.
[0006] In a first aspect, an embodiment of the present utility model provides a propane liquid collection and vaporization device based on LNG cold energy power generation, comprising: a liquid collection tank and a side-mounted water bath vaporizer; wherein, the middle part of the liquid collection tank is connected to the bottom of a turbine generator set and the low point of an outlet pipeline through pipelines; the outlet pipeline is the pipeline between the outlet of the turbine generator set and a split vaporizer; the input end of the side-mounted water bath vaporizer is connected to the bottom of the liquid collection tank, and the output end of the side-mounted water bath vaporizer is connected to the top of the liquid collection tank; the top of the liquid collection tank is also connected to the split vaporizer; the liquid collection tank is used for collecting propane condensate generated when the turbine generator set stops; the side-mounted water bath vaporizer is used for vaporizing the propane condensate.
[0007] Further, the side-mounted water bath vaporizer is arranged inside a water tank, and a temperature sensor and an electric heater are arranged inside the water tank; the temperature sensor is used for obtaining the water temperature inside the water tank; the electric heater is used for heating the water inside the water tank.
[0008] Further, a liquid level measuring point and a pressure measuring point are arranged on the tank body of the liquid collection tank; wherein, the liquid level measuring point is connected to the bottom of the liquid collection tank through a pipeline, and a pressure sensor is arranged on the pressure measuring point.
[0009] Further, a flame arrester is arranged on the top of the liquid collection tank, and a safety valve is arranged on the connecting pipeline between the flame arrester and the top of the liquid collection tank.
[0010] Further, a drain and blowdown valve is also arranged on the connecting pipeline between the input end of the side-mounted water bath vaporizer and the bottom of the liquid collection tank, and is used for discharging the oil stains leaked from the turbine generator set.
[0011] The present utility model provides a propane liquid collection and vaporization device based on LNG cold energy power generation, which can reduce the installation height of the turbine generator set, save investment costs, improve the utilization efficiency of the liquid collection and vaporization device, solve the problem that the unit cannot be started and stopped multiple times due to the slow vaporization of propane liquid, and alleviate the technical problem that the propane gas condenses into liquid at the low point of the pipeline and causes equipment damage after the installation height of the turbine generator set is reduced, on the premise of ensuring equipment safety and not affecting the heat exchange efficiency of the split vaporizer in the cold energy power generation device. Description of the Drawings
[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the specific embodiments or the description of the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0013] Figure 1 This is the schematic diagram of a propane liquid collection and gasification device based on LNG cold energy power generation provided by an embodiment of the present utility model.
[0014] In the figure: 1. Liquid collection tank, 2. Side-mounted water bath vaporizer, 3. Turbine generator set, 4. Split vaporizer, 5. Water tank, 6. Temperature sensor, 7. Electric heater, 8. Liquid level measuring point, 9. Pressure measuring point, 10. Pressure sensor, 11. Flame arrester, 12. Safety valve, 13. Drain and blowdown valve. Specific embodiments
[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0016] Figure 1 This is the schematic diagram of a propane liquid collection and gasification device based on LNG cold energy power generation provided by an embodiment of the present utility model. As Figure 1 shown, the device includes: a liquid collection tank 1 and a side-mounted water bath vaporizer 2; wherein, the middle part of the liquid collection tank 1 is connected to the bottom of the turbine generator set 3 and the low point of the outlet pipeline through pipelines; wherein, the outlet pipeline is the pipeline between the outlet of the turbine generator set 3 and the split vaporizer 4.
[0017] The input end of the side-mounted water bath vaporizer 2 is connected to the bottom of the liquid collection tank 1, and the output end of the side-mounted water bath vaporizer 2 is connected to the top of the liquid collection tank 1; the top of the liquid collection tank 1 is also connected to the split vaporizer 4.
[0018] Specifically, the liquid collection tank 1 is used to collect the propane condensate generated when the turbine generator set 3 stops.
[0019] The side-mounted water bath vaporizer 2 is used to gasify the propane condensate.
[0020] Specifically, as Figure 1 shown, the side-mounted water bath vaporizer 2 is arranged inside the water tank 5, and a temperature sensor 6 and an electric heater 7 are arranged inside the water tank 5.
[0021] The temperature sensor 6 is used to obtain the water temperature inside the water tank 5;
[0022] The electric heater 7 is used to heat the water inside the water tank 5.
[0023] In an alternative embodiment provided by the embodiment of the present utility model, the side-mounted water bath vaporizer 2 uses process water as the water source, and the water level in the water tank 5 is controlled by manual water replenishment to submerge the heat exchange pipes of the side-mounted water bath vaporizer 2. The signal of the temperature sensor 6 provided inside the water tank 5 is introduced into the PLC, and a temperature control program is set: when the water temperature in the water tank 5 is lower than the set value, the electric heater 7 is started; when the water temperature in the water tank 5 is higher than the set value, the electric heater 7 is stopped.
[0024] Specifically, as Figure 1 shown, a liquid level measuring point 8 and a pressure measuring point 9 are provided on the tank body of the liquid collection tank 1; among them, the liquid level measuring point 8 is connected to the bottom of the liquid collection tank 1 through a pipeline, and a pressure sensor 10 is provided on the pressure measuring point 9.
[0025] Specifically, the pressure sensor 10 is used to monitor the internal pressure value of the liquid collection tank 1; the liquid level measuring point 8 is used to prevent the internal liquid level of the liquid collection tank 1 from overflowing and to monitor the liquid level situation after the stored liquid inside the liquid collection tank 1 is vaporized.
[0026] Specifically, as Figure 1 shown, a flame arrester 11 is further provided on the top of the liquid collection tank 1, and a safety valve 12 is provided on the connecting pipeline between the flame arrester 11 and the top of the liquid collection tank 1.
[0027] Specifically, as Figure 1 shown, a drain and blowdown valve 13 is further provided on the connecting pipeline between the input end of the side-mounted water bath vaporizer 2 and the bottom of the liquid collection tank 1, which is used to discharge the oil stains leaked from the turbine generator set 3.
[0028] The working principle of a propane liquid collection and vaporization device based on LNG cold energy power generation provided by the embodiment of the present utility model is as follows: Collection pipelines are respectively led out from the bottom of the turbine generator set 3 and the low point of the outlet pipeline to the liquid collection tank 1 installed at a low position. When the turbine generator set 3 stops running, the propane condensate condensed at the outlet flows into the liquid collection tank 1, and flows through the side-mounted water bath vaporizer 2 through the bottom pipeline of the liquid collection tank 1 for vaporization; the vaporized propane gas is sent to the gas phase space at the top of the liquid collection tank 1 through a pipeline, and returns to the split vaporizer 4 through the top-connected pipeline; at the same time, the drain and blowdown valve 13 is used to discharge the oil stains leaked from the turbine generator set 3, avoiding the entry of oil stains into the propane system.
[0029] As can be seen from the above description, the embodiment of the present utility model provides a propane liquid collection and vaporization device based on LNG cold energy power generation, which has the following advantages compared with the prior art:
[0030] (1) The liquid collection and vaporization device is used to collect and process the condensate at the outlet of the turbine, reducing the installation height of the turbine generator set and saving the investment cost;
[0031] (2) The liquid collection tank collects the low-position condensate at the outlet of the turbine, preventing the liquid from flowing back to the high-speed rotating turbine and causing damage to the rotating components;
[0032] (3) The side-mounted water bath vaporizer is controlled by an explosion-proof electric heater to keep the water temperature constant, with a fast vaporization speed, improving the use efficiency of the liquid collection tank and meeting the explosion-proof requirements;
[0033] (4) The liquid collection tank is provided with liquid level and pressure monitoring, and a safety valve is installed at the top, meeting the requirements of special equipment;
[0034] (5) The collected condensate is treated by vaporization. Some oil droplets leaked during the high-speed rotation of the turbine are discharged through the bottom drain of the liquid collection tank to prevent the oil droplets from entering the split vaporizer and reducing its heat exchange efficiency.
[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claimed rights.
[0036] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A propane liquid collecting and gasifying device based on LNG cold energy power generation, characterized in that: include: A liquid collecting tank and a side water bath vaporizer; wherein the middle of the liquid collecting tank is connected to the bottom of the turbine generator set and the low point of the outlet pipe through pipelines respectively; the outlet pipe is a pipeline between the outlet of the turbine generator set and the split vaporizer; the input end of the side water bath vaporizer is connected to the bottom of the liquid collecting tank, and the output end of the side water bath vaporizer is connected to the top of the liquid collecting tank; the top of the liquid collecting tank is also connected to the split vaporizer; The liquid collecting tank is used to collect propane condensate generated when the turbine generator set is shut down; The side-mounted water bath vaporizer is used to vaporize the propane condensate.
2. The propane liquid collecting and gasifying device based on LNG cold energy power generation according to claim 1 is characterized in that: The side-mounted water bath vaporizer is arranged inside the water tank, and a temperature sensor and an electric heater are arranged inside the water tank; The temperature sensor is used to obtain the water temperature inside the water tank; The electric heater is used to heat the water inside the water tank.
3. The propane liquid collecting and gasifying device based on LNG cold energy power generation according to claim 1 is characterized in that: A liquid level measuring point and a pressure measuring point are arranged on the tank body of the liquid collecting tank; wherein the liquid level measuring point is connected with the bottom of the liquid collecting tank through a pipeline, and a pressure sensor is arranged on the pressure measuring point.
4. The propane liquid collecting and gasifying device based on LNG cold energy power generation according to claim 1 is characterized in that: A flame arrester is also arranged on the top of the liquid collecting tank, and a safety valve is arranged on the connecting pipeline between the flame arrester and the top of the liquid collecting tank.
5. The propane liquid collecting and gasifying device based on LNG cold energy power generation according to claim 1 is characterized in that: A drain valve is also provided on the connecting pipe between the input end of the bypass water bath gasifier and the bottom of the liquid collecting tank to discharge the oil leaked from the turbine generator set.