High-speed turbine power generation system for esterified steam

Abstract

The utility model discloses a high-speed turbine power generation system for esterified steam, which comprises a high-speed turbine, the steam inlet end of the high-speed turbine is communicated with external esterified steam through a steam pipeline, and the output shaft end of the high-speed turbine is connected with a generator through a coupler; the oil supply end of the lubricating oil station is connected with the oil inlet end of the high-speed turbine through an oil supply pipeline; the steam inlet end of the steam condenser is connected with the steam outlet end of the high-speed turbine through a compensator, and the steam condenser is used for enabling steam discharged from the high-speed turbine to pass through the compensator and then enter the steam condenser to be condensed into water; the condensate pump is communicated with a drain port of the condenser through a condensate recovery pipeline; an extraction opening of the vacuum pump set is connected with a non-condensable gas outlet of the condenser through a gas pipeline, and the vacuum pump set is used for extracting non-condensable gas in the condenser; the high-speed turbine generator set converts heat energy of esterified steam into electric energy to be output, an original fan cooling process is replaced, and recycling of energy is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of power generation technology, and in particular relates to a high-speed turbine power generation system for esterification steam. Background Technology

[0002] Esterification is a type of organic chemical reaction in which alcohols react with carboxylic acids or oxy-containing inorganic acids to form esters and water. It is classified into three types: reactions of carboxylic acids with alcohols, reactions of inorganic oxyacids with alcohols, and reactions of strong inorganic acids with alcohols. The esterification of carboxylic acids with alcohols is reversible and generally very slow; therefore, concentrated sulfuric acid is often used as a catalyst. Polycarboxylic acids reacting with alcohols can produce various esters. Reactions of strong inorganic acids with alcohols are generally faster. A typical esterification reaction is the reaction of ethanol with acetic acid, producing ethyl acetate, which has an aromatic odor and is a raw material for the manufacture of dyes and pharmaceuticals. Esterification reactions are widely used in organic synthesis and other fields.

[0003] During the esterification reaction in the power generation system, a large amount of mixed steam is generated at the top of the process distillation column. This mixed steam is saturated steam containing acetaldehyde and is corrosive. The current mainstream process involves cooling and condensing the steam into esterified water using a blower. The temperature of the condensed esterified water is approximately 50-60°C. A portion of the condensate is returned to the process column, while the remaining portion is sent to a wastewater treatment plant after recovering some organic solvents via a stripping tower. This process of directly condensing the esterified steam, which has a certain temperature and pressure, into water using a blower consumes a significant amount of electricity and wastes this steam energy.

[0004] In conclusion, it is necessary to propose a high-speed turbine power generation system for esterification steam to solve the energy consumption problem in the current power generation system. Utility Model Content

[0005] The purpose of this invention is to provide a high-speed turbine power generation system for esterification steam, which solves the energy consumption problem in the current power generation system. The system is reasonably designed and has a simple structure, converting the thermal energy of esterification steam into electrical energy output, replacing the original fan cooling process, and realizing energy recovery and reuse.

[0006] This invention provides a high-speed turbine power generation system for esterification steam, comprising:

[0007] A high-speed turbine, wherein the steam inlet of the high-speed turbine is connected to external esterification steam through a steam pipeline, and the output shaft of the high-speed turbine is connected to a generator through a coupling;

[0008] The lubricating oil station is connected to the oil inlet of the high-speed turbine via an oil supply pipeline. It is used to supply lubricating oil to the high-speed turbine and automatically recover the high-temperature lubricating oil that has passed through the high-speed turbine into the oil tank of the station. The lubricating oil is then cooled in the heat exchanger of the lubricating oil station and recycled.

[0009] A condenser, wherein the steam inlet of the condenser is connected to the steam outlet of the high-speed turbine via a compensator, is used to condense the steam discharged from the high-speed turbine into water after passing through the compensator.

[0010] A condensate pump, which is connected to the drain outlet of the condenser through a condensate recovery pipeline, is used to extract the condensate collected in the condenser and pressurize it to be transported back to the production process for reuse.

[0011] A vacuum pump unit, the extraction port of which is connected to the non-condensable gas outlet of the condenser via a gas pipeline, is used to extract non-condensable gas from the condenser.

[0012] Preferably, the steam inlet pipeline is equipped with an electric isolation valve, a steam-water separator, a filter, a flow meter, a regulating valve group, and related detection instruments in sequence to control and monitor the state of the steam. When the electric isolation valve and the regulating valve group are opened, external steam enters the high-speed turbine.

[0013] Preferably, the drain outlet of the steam-water separator is connected to the condenser through a condensate pipeline, and an automatic drain valve is installed on the condensate pipeline to automatically discharge water from the steam into the condenser after it is separated by the steam-water separator.

[0014] Preferably, the lubrication station is equipped with a main oil pump, an auxiliary oil pump, and an emergency oil pump. Under normal operating conditions, the main oil pump delivers lubricating oil from the lubrication station to the high-speed turbine. In the event of a main oil pump failure, the auxiliary oil pump automatically starts. In the event of a power outage or a failure of either the main or auxiliary oil pumps, the emergency oil pump automatically starts. Under any operating conditions, the lubrication station continuously supplies lubricating oil at a temperature below 45°C to the high-speed turbine.

[0015] Preferably, the lubrication station is also equipped with an oil filter, an oil heat exchanger, an oil pressure detection instrument, and an oil temperature detection instrument to monitor the oil pressure and oil temperature of the lubrication station in real time, and to automatically alarm the lubrication station when the oil filter pressure difference reaches the pressure difference threshold, the oil temperature exceeds the temperature threshold, or the oil pressure is low.

[0016] Preferably, the condenser is equipped with a hot well and a condensate expansion tank, which are used to condense the steam discharged from the high-speed turbine into water in the condenser and collect it in the hot well, and collect the condensate on the condensate recovery pipeline into the condensate expansion tank, and finally enter the condenser hot well.

[0017] Preferably, the condenser is also equipped with a desuperheating and pressure reducing bypass. When the high-speed turbine trips or stops, the regulating valve group is closed, and the esterification steam directly enters the condenser through the desuperheating and pressure reducing bypass and condenses into water.

[0018] Preferably, the vacuum pump assembly includes a first screw vacuum pump, a second screw vacuum pump, a third screw vacuum pump, and a non-condensable gas collection tank. The outlets of the first, second, and third screw vacuum pumps are connected to the inlet of the non-condensable gas collection tank via gas pipelines. The flow-through parts of the first, second, and third screw vacuum pumps are made of corrosion-resistant material, and the gas pipelines and the non-condensable gas collection tank are made of stainless steel.

[0019] Preferably, the condensate pump includes a first variable frequency pump and a second variable frequency pump. Under normal operating conditions, the first variable frequency pump is operated to automatically control the flow rate and regulate the condensate level in the condenser hot well. Under the condition of failure of the first variable frequency pump, the second variable frequency pump is automatically started.

[0020] Preferably, the high-speed turbine, generator, and lubrication station are integrated on a single skid or each device is a separate skid.

[0021] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0022] 1. This utility model treats external esterification steam through an electric isolation valve, a steam-water separator, and a filter before it enters a high-speed turbine. Inside the turbine, the steam passes through multiple impellers. Due to the pressure and temperature differences between the impellers, the steam expands as it passes through each impeller, converting its thermal and pressure energy into kinetic energy. This forms a high-speed airflow that impacts the impellers, driving them to rotate. This achieves the initial conversion of steam energy into mechanical energy. The high-speed rotating turbine rotor drives the generator rotor to rotate synchronously. Through the principle of electromagnetic induction, an induced electromotive force is generated in the generator stator windings, causing the generator to output electrical energy. When the generator is connected to a load, current flows through the closed circuit under the influence of the electromotive force, achieving the conversion of mechanical energy into electrical energy. This solves the energy consumption problem in current power generation systems, resulting in a reasonable system design and simple structure. It converts the thermal energy of esterification steam into electrical energy output, replacing the original fan cooling process and achieving energy recovery and reuse.

[0023] 2. This utility model integrates a high-speed turbine, generator and lubrication station on a single skid or each piece of equipment is a separate skid, which improves the overall integrity and compactness of the system. Each skid-mounted equipment is equipped with an independent monitoring and control system, which can monitor the operating status in real time, promptly detect and handle potential faults, and reduce the impact of equipment failures on the entire system.

[0024] 3. This utility model connects the inlet of a high-speed turbine to external esterification steam and the outlet to a condenser, forming a complete steam treatment circuit. The externally supplied esterification steam expands and performs work in the high-speed turbine, driving the generator to rotate and generate electricity, efficiently converting the thermal and pressure energy of the steam into mechanical and electrical energy, achieving effective energy recovery and utilization. The steam inlet pipeline is equipped with an electric isolation valve, a steam-water separator, a filter, a flow meter, a regulating valve group, and related detection instruments, which can accurately control and monitor the state, flow rate, and quality of the steam. When the electric isolation valve and regulating valve group are open, it ensures that external steam enters the high-speed turbine stably, ensuring the stability and efficiency of the system operation. At the same time, the steam flow rate can be flexibly adjusted according to the production process requirements, achieving precise control of the power generation system.

[0025] 4. The lubrication station used in this utility model is equipped with an oil filter, an oil heat exchanger, an oil pressure detection instrument, and an oil temperature detection instrument to monitor the oil pressure and oil temperature of the lubrication station in real time. When the oil filter differential pressure, oil temperature, or oil pressure exceeds the set threshold, an automatic alarm is triggered to remind operators to perform timely maintenance and handling, ensuring the normal operation of the lubrication system and preventing equipment failure due to lubrication problems.

[0026] 5. This utility model achieves effective condensation and recovery of steam discharged from the high-speed turbine through the reasonable setting of the condenser. The steam enters the condenser through the compensator and is condensed into water. The water is then pumped out by the condensate pump, pressurized and transported back to the production process for reuse, forming a steam recycling system. This improves water resource utilization, reduces production costs, and reduces the environmental impact of steam emissions. The condenser is equipped with a hot well and a condensate expansion tank for convenient collection and management of condensate. This ensures that the condensate on the condensate recovery pipeline ultimately enters the condenser hot well, guaranteeing the stable operation of the condensate recovery system. Attached Figure Description

[0027] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the high-speed turbine power generation system used for esterification steam in an embodiment of this utility model.

[0029] in,

[0030] 1-Electric isolation valve; 2-Steam-water separator; 3-Filter; 4-Flow meter; 5-Regulating valve assembly; 6-High-speed turbine; 7-Coupling; 8-Generator; 9-Lubricating oil station; 10-Compensator; 11-Condenser; 12-Desuperheating and pressure reducing bypass; 13-Condensate pump; 14-Vacuum pump assembly. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] like Figure 1 As shown, this utility model provides a high-speed turbine power generation system for esterification steam, comprising:

[0034] The high-speed turbine 6 has its inlet connected to external esterification steam via a steam pipeline, and its output shaft connected to a generator 8 via a coupling 7. The turbine 6 uses a side-exhaust method, with its exhaust port connected to a condenser 11 via a compensator 10. The high-speed turbine 6 and condenser 11 are arranged in parallel. The high-speed impeller has a rated speed exceeding 10,000 rpm and is an integral disc type made of corrosion-resistant alloy steel. The high-speed turbine 6 includes a high-speed impeller, a volute, and a gearbox. The low-speed shaft, after reduction by the gearbox, is connected to the generator 8 via a coupling 7. All of these components are integrated onto a single base.

[0035] The lubricating oil station 9 is connected to the oil inlet of the high-speed turbine 6 via an oil supply pipeline. It is used to supply lubricating oil to the high-speed turbine 6 and automatically recover the high-temperature lubricating oil that has passed through the high-speed turbine 6 into the oil tank of the station. The lubricating oil station 9 can provide uninterrupted lubricating oil to the high-speed turbine 6. The high-temperature lubricating oil that has passed through the high-speed turbine 6 returns to the heat exchanger in the lubricating oil station 9 for cooling and reuse. That is, the lubricating oil automatically returns to the oil tank after heat exchange. The lubricating oil station 9 is integrated on the base of the high-speed turbine 6, and the oil tank is placed inside the base.

[0036] The condenser 11 has its inlet end connected to the outlet end of the high-speed turbine 6 via a compensator 10. The condenser 11 is used to condense the steam discharged from the high-speed turbine 6 into water after passing through the compensator 10. The input end of the condensate pump 13 is connected to the condensate recovery pipeline, and the output end of the condensate pump 13 is used to transport the condensate to the demineralized water tank via a pipeline.

[0037] A condensate pump 13 is connected to the drain port of the condenser 11 via a condensate recovery pipeline. The condensate pump 13 is used to extract the condensate collected in the condenser 11, pressurize it, and transport it back to the production process for reuse. The condensate recovery pipeline is equipped with necessary valves, instruments, and filters 3. After the condensate pump 13 is turned on, the condensate in the condenser 11 can be extracted, pressurized, and transported to a designated location.

[0038] Vacuum pump assembly 14, the suction port of vacuum pump assembly 14 is connected to the non-condensable gas outlet of condenser 11 through a gas pipeline, and is used to extract non-condensable gas in condenser 11. An electric valve is installed on the gas pipeline. After opening vacuum pump assembly 14 and electric valve on pipeline, non-condensable gas in condenser 11 can be extracted to maintain a negative pressure state.

[0039] The aforementioned system converts the energy of esterification steam into mechanical energy through a high-speed turbine 6, which in turn drives a generator 8 to produce electricity. This effectively recovers heat energy that is typically wasted in industrial processes, enabling energy reuse and improving overall energy efficiency. It reduces the reliance on fossil fuels in traditional power generation methods, thereby reducing greenhouse gas emissions and other pollutants, contributing to environmental protection and sustainable development. The efficient generation of electricity from waste heat reduces the need for external power supply, helping to lower energy costs for businesses in the long term. The lubrication station 9 ensures proper lubrication and cooling of the high-speed turbine 6, extending its service life and guaranteeing stable system operation. The combination of the condenser 11 and condensate pump 13 allows for the recycling of water resources in the system, reducing the demand for fresh water in industrial production and also reducing wastewater discharge. The application of the vacuum pump unit 14 effectively removes non-condensable gases from the system, preventing potential safety issues or performance degradation caused by their accumulation.

[0040] In one embodiment, the steam inlet pipeline is sequentially equipped with an electric isolation valve 1, a steam-water separator 2, a filter 3, a flow meter 4, a regulating valve group 5, and related detection instruments for controlling and monitoring the steam status. When the electric isolation valve 1 and the regulating valve group 5 are open, external steam enters the high-speed turbine 6. The regulating valve group 5 uses an electro-hydraulic actuator and has both quick-closing and regulating functions, with a quick-closing time of less than 1 second and a regulating accuracy of less than 0.1%. The steam-water separator 2 has a baffle structure and is used to filter water from the esterification steam.

[0041] In one embodiment, the drain port of the steam-water separator 2 is connected to the condenser 11 via a condensate pipeline, and an automatic drain valve is installed on the condensate pipeline. This valve automatically discharges water from the steam after it has been separated by the steam-water separator 2 into the condenser 11. The presence of the automatic drain valve fully automates the entire draining process. When water is separated from the steam by the steam-water separator 2, the automatic drain valve automatically opens and closes according to water level and other conditions, draining the water into the condenser 11. This reduces the workload of manual draining, eliminates the need for constant monitoring of the draining process, lowers labor costs, and avoids problems such as untimely or excessive draining due to human factors. The automated draining process quickly and promptly removes water, ensuring that the steam-water separator 2 is always in good working condition and that excessive water accumulation does not affect its separation effect. This helps maintain the efficient operation of the entire system, allowing the steam to enter subsequent equipment such as the turbine under ideal conditions. The automatic steam trap precisely controls the flow rate and timing of water drainage, discharging water at an appropriate speed based on changes in the water level within the steam-water separator 2. This precise control maintains a stable water level within the separator 2, ensuring the separated water flows smoothly into the condenser 11 and preventing adverse effects on the system from excessively fast or slow drainage. Timely drainage of the separated water from the steam-water separator 2 prevents damage due to excessively high water levels. The automatic steam trap ensures that the water entering the condenser 11 is effectively separated, improving system efficiency, protecting equipment, and extending its service life.

[0042] Furthermore, the opening of the regulating valve group 5 can be adjusted arbitrarily, thereby adjusting the flow rate of steam entering the high-speed turbine 6. The speed of the high-speed turbine 6 can be adjusted when the unit starts up. The low-speed shaft of the high-speed turbine 6 is connected to the generator 8 through the coupling 7. At this time, the speed of the generator 8 is consistent with the speed of the low-speed shaft of the high-speed turbine 6. When the speed of the generator 8 reaches the grid connection speed, the unit automatically connects to the grid. After grid connection, continuing to open the regulating valve group 5 can increase the output power of the generator 8 until the design operating condition is reached.

[0043] In one embodiment, the lubrication station 9 is equipped with a main oil pump, an auxiliary oil pump, and an emergency oil pump. Under normal operating conditions, the main oil pump delivers lubricating oil from the lubrication station 9 to the high-speed turbine 6. In the event of a main oil pump failure, the auxiliary oil pump automatically starts. In the event of a power outage or failure of either the main or auxiliary oil pumps, the emergency oil pump automatically starts. Under any operating condition, the lubrication station 9 continuously supplies lubricating oil at temperatures below 45°C to the high-speed turbine 6. The main, auxiliary, and emergency oil pumps constitute a multi-layered safety mechanism. Under normal operating conditions, the main oil pump is responsible for delivering lubricating oil to the high-speed turbine 6, ensuring normal lubrication of the equipment. When the main oil pump fails, the auxiliary oil pump automatically starts, seamlessly taking over the lubrication work and ensuring continuous lubrication. Even in extreme cases such as a power outage or failure of both the main and auxiliary oil pumps, the emergency oil pump automatically starts, providing an uninterrupted supply of lubricating oil to the high-speed turbine 6. This multi-layered safety mechanism significantly reduces the risk of equipment damage due to lubrication system failures and improves the reliability and stability of the entire power generation system. High-speed turbines require good lubrication during operation to reduce friction and wear. Interruption of the lubricating oil supply can lead to excessive wear, overheating, or even damage to turbine components. The coordinated operation of the main and auxiliary oil pumps and the emergency oil pump ensures a stable lubricating oil supply, effectively preventing equipment failures caused by poor lubrication, extending equipment lifespan, and reducing maintenance and replacement costs. Maintaining the lubricating oil temperature below 45°C ensures good viscosity and lubrication performance, providing optimal lubrication for the high-speed turbine. The automatic start-up function of the auxiliary and emergency oil pumps demonstrates the system's high degree of automation. In the event of a sudden malfunction or power outage, the automatic start of the emergency oil pump quickly provides lubricating oil to the high-speed turbine, preventing more serious problems caused by lubrication interruption.

[0044] In one embodiment, the lubricating oil station 9 is further equipped with an oil filter 3, an oil heat exchanger, an oil pressure detection instrument, and an oil temperature detection instrument to monitor the oil pressure and oil temperature of the lubricating oil station 9 in real time. The lubricating oil station 9 will automatically alarm when the differential pressure of the oil filter 3 reaches a differential pressure threshold, the oil temperature exceeds a temperature threshold, or the oil pressure is low. That is, the lubricating oil station 99 can automatically alarm when the differential pressure of the oil filter 3 is high, the oil temperature is high, or the oil pressure is low. If necessary, it can interlock and shut down the machine and quickly cut off the steam through the regulating valve group 5. The oil filter 3 can effectively filter impurities and particulate matter in the lubricating oil, preventing them from entering critical equipment such as the high-speed turbine 6. When the differential pressure of the oil filter 3 reaches the differential pressure threshold, it will automatically alarm, promptly reminding personnel to replace or clean the filter 3, ensuring the cleanliness of the lubricating oil, avoiding equipment wear and malfunctions caused by impurities, and extending the service life of the equipment. The oil temperature monitoring instrument monitors the lubricating oil temperature in real time. It automatically alarms when the oil temperature exceeds the threshold. Excessively high oil temperatures can reduce lubricating oil viscosity and performance, affecting lubrication and potentially causing equipment malfunctions. Timely alarms allow operators to take appropriate measures, such as adjusting the cooling system or shutting down for inspection, to prevent equipment damage due to high temperatures. The oil pressure monitoring instrument monitors the oil pressure of lubrication station 9 in real time. It automatically alarms when the oil pressure drops to the pressure threshold. Stable oil pressure is crucial for ensuring normal lubricating oil delivery and adequate lubrication of the equipment. Insufficient oil pressure can lead to insufficient lubricating oil supply, increased friction, and even equipment damage. The automatic alarm function allows operators to promptly identify problems and take measures such as pressurization or shutdown protection to ensure the equipment operates under safe oil pressure.

[0045] In one embodiment, the condenser 11 is equipped with a hot well and a condensate expansion tank. The hot well collects the steam discharged from the high-speed turbine 6 as water after condensation within the condenser 11, and collects the condensate from the condensate recovery pipeline into the condensate expansion tank, ultimately leading to the hot well in the condenser 11. By installing a hot well and a condensate expansion tank on the condenser 11, the condensed water can be effectively collected and reused. The hot well acts as a buffer zone, collecting the water condensed by the condenser 11. During system operation, when the condensate production or flow state changes, the hot well can play a regulatory role, maintaining a stable water level and preventing excessive water level fluctuations from affecting the normal operation of the condenser 11. For example, during turbine load changes or start-up and shutdown, the hot well can accommodate excess condensate, preventing overflow or cavitation problems in the condensate pipeline and ensuring system stability. The condensate expansion tank collects the condensate from the condensate recovery pipeline and treats it appropriately. During condensate recovery, pressure changes can cause water vaporization and volume expansion. Without proper handling, this can lead to pipeline vibration, impact, and noise, affecting the safe and stable operation of the system. A hydrophobic expansion tank can buffer and expand this condensate, stabilizing it before sending it to the hot well, thus preventing these problems and ensuring the normal operation of the condensate recovery system.

[0046] In one embodiment, the condenser 11 is further equipped with a desuperheating and pressure-reducing bypass 12. When the high-speed turbine 6 trips or stops, the regulating valve group 5 closes, and the esterification steam directly enters the condenser 11 through the desuperheating and pressure-reducing bypass 12 to condense into water, preventing steam from being discharged and wasted. Alternatively, the condenser 11 may have its own desuperheating and pressure-reducing device. When the high-speed turbine 6 trips, the steam directly enters the condenser 11 for condensation after passing through the desuperheating and pressure-reducing device. By directly introducing steam into the condenser 11 through the desuperheating and pressure-reducing bypass 12 to condense into water, the heat and moisture in the steam can be effectively recovered, avoiding steam discharge, reducing energy waste and environmental pollution. Pre-treatment of the steam by the desuperheating and pressure-reducing device allows the steam to enter the condenser 11 smoothly, ensuring the normal operation of the condenser 11, extending its service life, and improving the reliability and stability of the system.

[0047] In one embodiment, the vacuum pump assembly 14 includes a first screw vacuum pump, a second screw vacuum pump, a third screw vacuum pump, and a non-condensable gas collection tank. The outlets of the first, second, and third screw vacuum pumps are connected to the inlet of the non-condensable gas collection tank via gas pipelines. The flow-through parts of the first, second, and third screw vacuum pumps are made of corrosion-resistant material, while the gas pipelines and the non-condensable gas collection tank are made of stainless steel. The corrosion-resistant material prevents damage to the pumps from these gases, ensuring long-term stable operation, while the stainless steel enhances overall stability. The coordinated operation of the three pumps allows for adjustment of pumping capacity and speed according to actual needs, enabling the entire system to reach the required vacuum state more quickly and maintain stability. The non-condensable gas collection tank effectively collects and treats non-condensable gases generated in the system. If left untreated, these gases may accumulate in the system, affecting the vacuum level and the performance of the vacuum pumps. By collecting the non-condensable gases in a dedicated collection tank, subsequent processing or discharge can be conveniently performed, ensuring the normal operation of the vacuum system and improving its reliability and stability.

[0048] In one embodiment, the condensate pump 13 is a one-in-one-standby variable frequency pump, that is, it includes a first variable frequency pump and a second variable frequency pump. Under normal operating conditions, the first variable frequency pump is operated to automatically control the flow rate and regulate the condensate level in the hot well of the condenser 11. In the event of a failure of the first variable frequency pump, the second variable frequency pump is automatically started. Normally, one pump is running, and the liquid level in the hot well of the condenser 11 is automatically controlled by the variable frequency. When one pump fails, the other pump is automatically started.

[0049] In one embodiment, the vacuum pump uses three screw pumps, two in operation and one as a backup. The flow passage of the screw pumps is made of stainless steel. The operation of the vacuum pumps can ensure that the pressure of the condenser 11 is maintained at around -90 kPa, and the non-condensable gases in the steam are extracted and processed separately. All of the above equipment is integrated on a single skid.

[0050] In one embodiment, the high-speed turbine 6, generator 8, and lubrication station 9 are integrated on a single skid, or each device is a separate skid. Integrating the high-speed turbine 6, generator 8, and lubrication station 9 into a single skid makes the entire power generation system more compact, occupies less space, and results in a more reasonable system design and simpler structure.

[0051] The working principle of this embodiment is as follows: Esterification steam is sent through a steam pipeline, and after passing through the electric isolation valve 1, steam-water separator 2, filter 3, flow meter 4, and regulating valve group 5 on the pipeline, it is delivered to the high-speed turbine 6. The esterification steam is accelerated by the stationary blades in the volute of the high-speed turbine 6 and then impacts the moving blades, converting kinetic energy into mechanical energy to make the moving blades rotate and do work. The high-speed rotating moving blades are decelerated by the gearbox of the high-speed turbine 6 and then connected to the generator 8 through the coupling 7 to drive the generator 8 to generate electricity. After doing work, the esterification steam is discharged through the exhaust port of the high-speed turbine 6 and enters the condenser 11 to condense into water. The non-condensable gases in the condenser 11 are pumped away by the vacuum pump, and the condensate is collected in the hot well of the condenser 11. The condensate pump 13 pumps the condensate in the hot well and pressurizes it to be transported back to the production process for reuse.

[0052] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A high-speed turbine power generation system for esterification steam, characterized in that, include: A high-speed turbine, wherein the steam inlet of the high-speed turbine is connected to external esterification steam through a steam pipeline, and the output shaft of the high-speed turbine is connected to a generator through a coupling; The lubricating oil station is connected to the oil inlet of the high-speed turbine via an oil supply pipeline. It is used to supply lubricating oil to the high-speed turbine and automatically recover the high-temperature lubricating oil that has passed through the high-speed turbine into the oil tank of the station. The lubricating oil is then cooled in the heat exchanger of the lubricating oil station and recycled. A condenser, wherein the steam inlet of the condenser is connected to the steam outlet of the high-speed turbine via a compensator, is used to condense the steam discharged from the high-speed turbine into water after passing through the compensator. A condensate pump, which is connected to the drain outlet of the condenser through a condensate recovery pipeline, is used to extract the condensate collected in the condenser and pressurize it to be transported back to the production process for reuse. A vacuum pump unit, the extraction port of which is connected to the non-condensable gas outlet of the condenser via a gas pipeline, is used to extract non-condensable gas from the condenser.

2. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The steam inlet pipeline is sequentially equipped with an electric isolation valve, a steam-water separator, a filter, a flow meter, a regulating valve group, and related detection instruments to control and monitor the state of the steam. When the electric isolation valve and the regulating valve group are opened, external steam enters the high-speed turbine.

3. The high-speed turbine power generation system for esterification steam according to claim 2, characterized in that, The drain outlet of the steam-water separator is connected to the condenser through a condensate pipeline, and an automatic drain valve is installed on the condensate pipeline to automatically discharge water from the steam into the condenser after it is separated by the steam-water separator.

4. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The lubrication station is equipped with a main oil pump, an auxiliary oil pump, and an emergency oil pump. Under normal operating conditions, the main oil pump delivers lubricating oil from the lubrication station to the high-speed turbine. In the event of a main oil pump failure, the auxiliary oil pump automatically starts. In the event of a power outage or a failure of either the main or auxiliary oil pumps, the emergency oil pump automatically starts. Under any operating conditions, the lubrication station continuously supplies lubricating oil at a temperature below 45°C to the high-speed turbine.

5. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The lubrication station is also equipped with an oil filter, an oil heat exchanger, an oil pressure detection instrument, and an oil temperature detection instrument to monitor the oil pressure and oil temperature of the lubrication station in real time. When the oil filter pressure difference reaches the pressure difference threshold, the oil temperature exceeds the temperature threshold, or the oil pressure is low, the lubrication station will automatically alarm.

6. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The condenser is equipped with a hot well and a condensate expansion tank, which are used to condense the steam discharged from the high-speed turbine into water in the condenser and collect it in the hot well. The condensate on the condensate recovery pipeline is collected into the condensate expansion tank and finally enters the hot well of the condenser.

7. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The condenser is also equipped with a desuperheating and pressure reducing bypass. When the high-speed turbine trips or stops, the regulating valve group closes, and the esterification steam enters the condenser directly through the desuperheating and pressure reducing bypass and condenses into water.

8. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The vacuum pump assembly includes a first screw vacuum pump, a second screw vacuum pump, a third screw vacuum pump, and a non-condensable gas collection tank. The outlets of the first, second, and third screw vacuum pumps are connected to the inlet of the non-condensable gas collection tank via gas pipelines. The flow-through parts of the first, second, and third screw vacuum pumps are made of corrosion-resistant material, and the gas pipelines and the non-condensable gas collection tank are all made of stainless steel.

9. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The condensate pump includes a first variable frequency pump and a second variable frequency pump. Under normal operating conditions, the first variable frequency pump is used to operate and automatically control the flow rate to regulate the condensate water level in the condenser hot well. In the event of a failure of the first variable frequency pump, the second variable frequency pump is automatically started.

10. The high-speed turbine power generation system for esterification steam according to claim 1, characterized in that, The high-speed turbine, generator, and lubrication station are integrated on a single skid or each piece of equipment is a separate skid.

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