Control system of flue gas trapping and augmented injection intelligent yield increasing equipment

Abstract

The utility model relates to the technical field of thickened oil recovery, and particularly discloses a control system of flue gas trapping and augmented injection intelligent yield increasing equipment. Comprising a controller, a flue gas waste heat recovery control unit, a flue gas dedusting, cooling, dewatering and filtering control unit, a flue gas screw compressor control unit, a flue gas compressor and split radiator control unit and an intelligent pollution discharge pH monitoring unit, the flue gas compressor and split type radiator control unit comprises a compressor frequency converter, a plurality of split type radiator frequency converters, an air inlet temperature sensor, an air inlet pressure sensor, an exhaust temperature sensor and an exhaust pressure sensor. By installing multiple stages of air inlet and exhaust temperature and pressure sensors on the compressor, the control system monitors temperature and pressure changes in real time and controls the exhaust temperature and exhaust pressure of each stage, so that acidic substances cannot be formed in flue gas, and normal operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of heavy oil mining, in particular to a control system for flue gas capture and injection intelligent production-increasing equipment. Background Art

[0002] Heavy oil is a crucial component of crude oil production and boasts abundant reserves. However, most developed heavy oil reservoirs in older areas have entered the high-volume production phase, resulting in declining development results. Continuous advancements in extraction technology are crucial for improving the recovery rate and economic benefits of heavy oil reservoirs. Steam injection thermal recovery is a key technology for heavy oil development, primarily encompassing steam injection, steam flooding, and SAGD. During steam injection thermal recovery, boiler combustion generates large amounts of flue gas, which is released into the atmosphere. A single steam injection boiler can produce 10,000-20,000 m³ / h of high-temperature flue gas at 160-200°C. This not only generates carbon dioxide but also wastes heat, contributing to the greenhouse effect. Flue gas is primarily composed of non-condensable gases such as nitrogen and carbon dioxide, which have a high solubility in heavy oil and provide a driving force for enhanced oil recovery. The carbon dioxide in flue gas is highly miscible with crude oil, reducing its viscosity. It also dissolves in formation water to form carbonic acid, which increases the pores of mineral particles, enhances the permeability of the oil reservoir, and improves oil recovery. Injecting some flue gas during the steam flooding process can effectively reduce heat loss, enhance heat transfer deep in the formation, and improve oil recovery efficiency.

[0003] In the process of flue gas treatment and pressurized reinjection in conventional control systems, the flue gas is easily compressed by the compressor in multiple stages, which easily forms acidic substances, and then corrodes the compressor cylinder and the inner wall of the pipeline, increases the frequency of equipment maintenance, and reduces the service life of the equipment.

[0004] Therefore, it is necessary to propose an improvement to overcome the defects of the prior art. Utility Model Content

[0005] The purpose of the utility model is to solve the problems in the prior art and provide a control system for flue gas capture and injection intelligent production-increasing equipment.

[0006] The technical solution of the utility model is:

[0007] A control system for intelligent flue gas capture and injection production-increasing equipment includes a controller, a flue gas waste heat recovery control unit, a flue gas dust removal, cold drying, water removal, and filtration control unit, a flue gas screw compressor control unit, a flue gas compressor and split radiator control unit, and an intelligent sewage pH monitoring unit. The flue gas compressor and split radiator control unit includes a compressor inverter, several split radiator inverters, an intake air temperature sensor, an intake air pressure sensor, an exhaust air temperature sensor, and an exhaust air pressure sensor. The compressor inverter, split radiator inverter, intake air temperature sensor, intake air pressure sensor, exhaust air temperature sensor, and exhaust air pressure sensor are respectively connected to the controller, the compressor inverter is connected to the compressor, and the split radiator inverter is connected to the split radiator. The operation of the split radiators is controlled by the several split radiator inverters. The control system monitors temperature and pressure changes in real time through the intake air temperature sensor, intake air pressure sensor, exhaust air temperature sensor, and exhaust pressure sensor, controlling the exhaust air temperature and exhaust pressure at each level to prevent the formation of acidic substances in the flue gas, thereby ensuring the normal operation of the equipment.

[0008] As a preferred technical solution, the intake temperature sensor and intake pressure sensor are arranged at the intake end of the compressor, and the exhaust temperature sensor and exhaust pressure sensor are arranged at the exhaust end of the compressor. The intake temperature sensor, intake pressure sensor, exhaust temperature sensor, and exhaust pressure sensor are arranged according to the number of compressor stages.

[0009] As a preferred technical solution, the flue gas waste heat recovery control unit includes a water pump inverter and several flue gas temperature sensors. The water pump inverter and flue gas temperature sensors are respectively connected to the controller, and the water pump inverter is connected to the water pump. The several flue gas temperature sensors collect flue gas temperature in real time. The water pump inverter controls the water pump to introduce pure water for the steam injection boiler, cooling the flue gas while heating the pure water. Through intelligent heat exchange, the flue gas temperature is reduced by 100°C, saving power for subsequent refrigerated dryer equipment.

[0010] As a preferred technical solution, the flue gas dust removal, cold drying, water removal, and filtration control unit includes a dust removal filter differential pressure transmitter, a water removal filter differential pressure transmitter, and a dew point meter, each connected to a controller. The differential pressure transmitters and dew point meter monitor the filter status and flue gas dew point in real time, providing early warning before filter clogging. This ensures the dew point of the purified and filtered flue gas is reduced to below 0°C, ensuring gas dryness.

[0011] As a further preferred technical solution, the intelligent sewage pH monitoring unit includes a pH monitoring sensor to transmit the real-time pH value of the sewage outlet to the controller.

[0012] As a preferred technical solution, the flue gas screw compressor control unit includes a screw compressor inverter, which is connected to the controller and the screw compressor. The screw compressor inverter controls the screw compressor speed, and the control system adjusts the compressor exhaust pressure and exhaust volume in real time based on the back-end gas injection volume.

[0013] As a preferred technical solution, the controller adopts a PID Compact controller.

[0014] As a further preferred technical solution, it also includes a data monitoring and data remote transmission unit for collecting and uploading data from each control unit.

[0015] The beneficial effects of the utility model are as follows:

[0016] This utility model provides a control system for intelligent flue gas capture and injection production-increasing equipment, offering advantages such as excellent safety, high integration, strong versatility, and modular design. It also meets the specific requirements of intelligent flue gas capture and injection production-increasing equipment. By installing multi-stage intake and exhaust temperature and pressure sensors on the compressor, the control system monitors temperature and pressure changes in real time and controls exhaust temperature and pressure at each stage, preventing the formation of acidic substances in the flue gas and ensuring normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the control system structure of the utility model; DETAILED DESCRIPTION

[0018] In order to make the technical means, technical features, purpose of the utility model and technical effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0019] like Figure 1 The utility model shows a control system for intelligent flue gas capture and injection production enhancement equipment, including a controller, a flue gas waste heat recovery control unit, a flue gas dust removal, cold drying, water removal, and filtration control unit, a flue gas screw compressor control unit, a flue gas compressor and split radiator control unit, an intelligent sewage pH monitoring unit, and a data monitoring and remote data transmission unit. The controller adopts a PID Compact controller.

[0020] The flue gas waste heat recovery control unit includes a water pump inverter and several flue gas temperature sensors. The water pump inverter and flue gas temperature sensors are connected to the controller, and the water pump inverter is connected to the water pump. The flue gas temperature sensors collect real-time flue gas temperature. The water pump inverter controls the water pump to introduce pure water from the steam injection boiler, cooling the flue gas while simultaneously heating the pure water. Through intelligent heat exchange, the flue gas temperature is reduced by 100°C, saving power for subsequent refrigerated dryer equipment.

[0021] The flue gas dust removal, cold drying, water removal, and filtration control unit includes a dust removal filter differential pressure transmitter, a water removal filter differential pressure transmitter, and a dew point meter. These are connected to the controller. The differential pressure transmitter and dew point meter monitor the filter status and flue gas dew point in real time, providing early warning before filter clogging. The dew point of the purified and filtered flue gas can be reduced to below 0°C, ensuring gas dryness.

[0022] The flue gas screw compressor control unit includes a screw compressor inverter, which is connected to the controller and the screw compressor. The screw compressor uses the screw compressor inverter to control the speed of the flue gas after heat exchange. The control system adjusts the compressor exhaust pressure and exhaust volume in real time based on the back-end gas injection volume.

[0023] The flue gas compressor and split radiator control unit includes a compressor inverter, several split radiator inverters, an intake air temperature sensor, an intake air pressure sensor, an exhaust air temperature sensor, and an exhaust air pressure sensor. The compressor inverter, split radiator inverter, intake air temperature sensor, intake air pressure sensor, exhaust air temperature sensor, and exhaust air pressure sensor are each connected to a controller. The compressor inverter is connected to the compressor, and the split radiator inverter is connected to the split radiator. The compressor inverter controls the operation of the compressor, while the several split radiator inverters control the operation of the split radiators. In this embodiment, the compressor is a four-stage compressor, with an intake air temperature sensor and an intake air pressure sensor installed at the intake end of each stage, and an exhaust air temperature sensor and an exhaust air pressure sensor installed at the exhaust end of each stage. Using these sensors, the control system monitors temperature and pressure changes in real time and controls the exhaust temperature and pressure at each stage to prevent the formation of acidic substances in the flue gas, thereby ensuring the normal operation of the equipment.

[0024] The intelligent wastewater pH monitoring unit includes a pH monitoring sensor. This advanced online pH sensor transmits the real-time pH value at the wastewater outlet to the controller. If the controller detects a pH value exceeding the set alarm threshold, the system will interact with the flue gas compressor and the split radiator's variable frequency control unit to adjust the exhaust gas temperature and pressure at each level to maintain the pH value within the appropriate range. If the pH value exceeds the set interlock threshold, the control system will initiate an interlock command, shutting down the equipment safely and prompting the operator to inspect the equipment.

[0025] The data monitoring and remote data transmission unit uses a 4G gateway to collect and upload data from various on-site control systems. When the network is good, the data is transmitted in real time to a cloud server for storage and analysis. When the device is in a remote area with a poor network signal, the data is stored locally on the server and synchronized to the cloud server when the network signal is restored. Equipment operators can view the equipment's operating status in real time via a mobile app or computer client. Administrators can remotely control the device's start, stop, and other related operations.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. In other words, any equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the technical scope of the present invention.

Claims

1. A flue gas capture and injection intelligent production increase equipment control system, characterized in that: It includes a controller, a flue gas waste heat recovery control unit, a flue gas dust removal, cold drying, water removal, filtration control unit, a flue gas screw compressor control unit, a flue gas compressor and split radiator control unit, and an intelligent sewage pH monitoring unit. The flue gas compressor and split radiator control unit includes a compressor inverter, several split radiator inverters, an intake air temperature sensor, an intake air pressure sensor, an exhaust temperature sensor, and an exhaust pressure sensor. The compressor inverter, the split radiator inverter, the intake air temperature sensor, the intake air pressure sensor, the exhaust temperature sensor, and the exhaust pressure sensor are respectively connected to the controller, the compressor inverter is connected to the compressor, and the split radiator inverter is connected to the split radiator.

2. The intelligent production increase equipment control system for flue gas capture and injection according to claim 1 is characterized in that: The intake temperature sensor and intake pressure sensor are arranged at the intake end of the compressor, and the exhaust temperature sensor and exhaust pressure sensor are arranged at the exhaust end of the compressor. The intake temperature sensor, intake pressure sensor, exhaust temperature sensor, and exhaust pressure sensor are arranged according to the number of compressor stages.

3. The intelligent production increase equipment control system for flue gas capture and injection according to claim 1 is characterized in that: The flue gas waste heat recovery control unit includes a water pump inverter and several flue gas temperature sensors. The water pump inverter and the flue gas temperature sensors are connected to the controller respectively, and the water pump inverter is connected to the water pump.

4. The intelligent production increase equipment control system for flue gas capture and injection according to claim 1 is characterized in that: The flue gas dust removal, cold drying, water removal and filtration control unit includes a dust removal filter differential pressure transmitter, a water removal filter differential pressure transmitter and a dew point meter, and the dust removal filter differential pressure transmitter, the water removal filter differential pressure transmitter and the dew point meter are respectively connected to the controller.

5. The intelligent production increase equipment control system for flue gas capture and injection according to claim 1 is characterized in that: The intelligent sewage pH monitoring unit includes a pH monitoring sensor.

6. The intelligent production increase equipment control system for flue gas capture and injection according to claim 1 is characterized in that: The flue gas screw compressor control unit includes a screw compressor frequency converter, which is connected to the controller and the screw compressor.

7. A flue gas capture and injection intelligent production increase equipment control system according to any one of claims 1 to 6, characterized in that: The controller adopts a PID Compact controller.

8. The intelligent production increase equipment control system for flue gas capture and injection according to claim 7 is characterized in that: It also includes a data monitoring and data remote transmission unit for collecting and uploading data from each control unit.

Images