CN210164648U - Residual heat utilization system for air compressor of offshore heavy oil field - Google Patents

Residual heat utilization system for air compressor of offshore heavy oil field Download PDF

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CN210164648U
CN210164648U CN201920969085.2U CN201920969085U CN210164648U CN 210164648 U CN210164648 U CN 210164648U CN 201920969085 U CN201920969085 U CN 201920969085U CN 210164648 U CN210164648 U CN 210164648U
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oil
heat exchanger
outlet
air compressor
control valve
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郝铭
戴国华
陈丰波
王文光
马金喜
王万旭
高国强
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China National Offshore Oil Corp CNOOC
CNOOC China Ltd Tianjin Branch
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China National Offshore Oil Corp CNOOC
CNOOC China Ltd Tianjin Branch
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/18Domestic hot-water supply systems using recuperated or waste heat

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Abstract

A waste heat utilization system of an air compressor in an offshore heavy oil field is characterized in that an oil circuit system is formed by connecting an air compressor head, an oil-gas separator, a heat exchanger, a temperature sensor, a temperature control valve, an oil cooler, a three-way valve and an oil filter and is used for recycling head lubricating oil after heat exchange between high-temperature lubricating oil and water; the waterway system is composed of two branch mechanisms connected in series with the heat exchanger, and one branch mechanism is composed of a hot water outlet of the heat exchanger which is connected in series with a user of the platform life building through a three-way valve, a first electric regulating valve, a hot water tank and the platform life building for the staff of the platform life building to use water; the other branch mechanism is formed by connecting a hot water outlet of a heat exchanger in series with the platform living building through a three-way valve, a second electric regulating valve, a heating water tank, an electric heater and a lithium bromide refrigerator unit and is used for refrigerating the platform living building; the first electric control valve and the second electric control valve are controlled by a programmable logic controller; the device is suitable for recovering the waste heat of the high-power air compressor in the offshore heavy oil field, and is simple, reasonable, economic and effective.

Description

Residual heat utilization system for air compressor of offshore heavy oil field
Technical Field
The utility model relates to a marine viscous crude oil field air compressor machine waste heat utilization system.
Background
Instruments and public air compressor devices are important process equipment of offshore platforms and mainly comprise air compression equipment, air purification equipment and air storage equipment. At present, in offshore oil and gas development, an air compressor is generally provided with two screw type oil injection compressors, one compressor is used, the other compressor is standby, the air supply amount is 250-600 m3/h, and the rated power of the single compressor is basically 50-100 kW. The design structure and the working principle of the screw air compressor determine that except a small part of input power of the screw air compressor is converted into potential energy of compressed air, the rest 80 percent of electric energy is not required by the air compressor, but is converted into heat energy and is discharged into air in a waste heat mode in an air cooling mode to be wasted. But in the marine thickened oil development process, the required rated power of the air compressor is large, and the rated power of a single air compressor is usually 250-360 kW. In order to promote energy conservation and consumption reduction of offshore oil and improve energy utilization efficiency, research on energy conservation technology of a high-power air compressor is urgently needed to realize reasonable utilization of energy of the air compressor of the offshore platform.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at overcomes the above-mentioned shortcoming that current product exists, and provides a marine viscous crude oil field air compressor machine waste heat utilization system, the high temperature lubricating oil heat that produces when its recoverable air compressor machine moves to supply with platform life building refrigeration and hot water, still can reduce high-power air compressor machine energy consumption, improve oil field economic benefits.
The purpose of the utility model is realized by the following technical scheme.
The utility model discloses a waste heat utilization system of an air compressor in an offshore heavy oil field, which is characterized by mainly comprising a waste heat recovery oil path system and a waste heat recovery water path system; the oil circuit system is formed by connecting an air compressor head, an oil-gas separator, a heat exchanger, a temperature sensor, a temperature control valve, an oil cooler, a three-way valve and an oil filter, and is used for recycling head lubricating oil after heat exchange between high-temperature lubricating oil and water; the inlet of the air compressor head is connected with the outlet of the oil filter, and the outlet of the air compressor head is connected with the inlet of the oil-gas separator; the outlet of the oil-gas separator is connected with the hot oil inlet of the heat exchanger; a hot oil outlet of the heat exchanger is connected with an inlet of a temperature sensor, and an outlet of the temperature sensor is connected with an inlet of a temperature control valve; an outlet at one end of the temperature control valve is connected with an inlet of an oil cooler, and an outlet of the oil cooler is connected with an inlet at one end of the three-way joint; the outlet at the other end of the temperature control valve is connected with the inlet at the other end of the three-way joint; the outlet of the three-way joint is connected with the inlet of the oil filter; a cold water inlet of the heat exchanger is connected with a water replenishing pipeline;
the waterway system is composed of two branch mechanisms connected in series with the heat exchanger, wherein one branch mechanism is formed by connecting a hot water outlet of the heat exchanger in series through a three-way valve, a first electric regulating valve, a hot water tank and a user of the platform life building in sequence and is used for bathing or daily life water of the staff of the platform life building; the other branch mechanism is formed by connecting a hot water outlet of a heat exchanger in series with the platform living building through a three-way valve, a second electric regulating valve, a heating water tank, an electric heater and a lithium bromide refrigerating unit in sequence, and is used for refrigerating the platform living building; the first electric control valve is controlled by a Programmable Logic Controller (PLC), a switching value output module of the PLC is connected with a coil end of the first electric control valve 10, and the PLC controls the opening of the first electric control valve 10 according to a current signal received by the first electric control valve 10 so as to control the flow of hot water in the hot water tank 11; the second electric control valve 13 is controlled by a Programmable Logic Controller (PLC), a switching value output module of the Programmable Logic Controller (PLC) is connected with a coil end of the second electric control valve 13, and the Programmable Logic Controller (PLC) controls the opening of the second electric control valve according to a current signal received from the second electric control valve so as to control the hot water flow of the heating water tank.
In the offshore heavy oil field air compressor waste heat utilization system, the oil cooler is an air-cooled oil cooler sold in the market at present; the lithium bromide unit is a product sold in the market; the heat exchanger is a plate heat exchanger sold in the market; the built-in electric heater of the heating water tank is an immersion electric heater sold in the market; the oil-gas separator is a product sold in the market at present.
The utility model discloses marine viscous crude oil field air compressor machine waste heat utilization system's beneficial effect, structural design is reasonable, and is simple and convenient practical, is applicable to the energy-conserving application of high-power air compressor machine.
Drawings
Fig. 1 is the utility model discloses marine viscous crude oil field air compressor machine waste heat utilization system block diagram.
The main reference numbers in the figures illustrate: the system comprises an air compressor 1, an oil-gas separator 2, a heat exchanger 3, a temperature sensor 4, a temperature control valve 5, an oil cooler 6, a three-way valve 7, an oil filter 8, a three-way valve 9, a first electric regulating valve 10, a hot water tank 11, a platform living building user 12, a second electric regulating valve 13, a heating water tank 14, an electric heater 15, a lithium bromide refrigerating unit 16, a platform living building room 17 and a water replenishing pipeline 18.
Detailed Description
As shown in fig. 1, the waste heat utilization system of the air compressor in the offshore heavy oil field of the present invention mainly comprises a waste heat recovery oil path system and a waste heat recovery water path system;
the oil circuit system is formed by connecting an air compressor head 1, an oil-gas separator 2, a heat exchanger 3, a temperature sensor 4, a temperature control valve 5, an oil cooler 6, a three-way valve 7 and an oil filter 8, and is used for recycling head lubricating oil after heat exchange is carried out on high-temperature lubricating oil and water; an inlet of the air compressor head 1 is connected with an outlet of the oil filter 8, and an outlet of the air compressor head 1 is connected with an inlet of the oil-gas separator 2; the outlet of the oil-gas separator 2 is connected with the hot oil inlet of the heat exchanger 3; a hot oil outlet of the heat exchanger 3 is connected with an inlet of a temperature sensor 4, and an outlet of the temperature sensor 4 is connected with an inlet of a temperature control valve 5; an outlet at one end of the temperature control valve 5 is connected with an inlet of an oil cooler 6, and an outlet of the oil cooler 6 is connected with an inlet at one end of a three-way joint 7; the outlet at the other end of the temperature control valve 5 is connected with the inlet at the other end of the three-way joint 7; the outlet of the three-way joint 7 is connected with the inlet of the oil filter 8; a cold water inlet of the heat exchanger 3 is connected with a water replenishing pipeline 18;
the waterway system is composed of two branch mechanisms connected in series with a heat exchanger 3, wherein one branch mechanism is formed by connecting a hot water outlet of the heat exchanger 3 in series through a three-way valve 9, a first electric regulating valve 10, a hot water tank 11 and a platform life building user 12 in sequence and is used for bathing or daily life water of platform life building staff; the other branch mechanism is formed by connecting a hot water outlet of the heat exchanger 3 in series through a three-way valve 9, a second electric regulating valve 13, a heating water tank 14, an electric heater 15, a lithium bromide refrigerating unit 16 and a platform living building room 17 in sequence and is used for refrigerating the platform living building room;
the first electric control valve 10 is controlled by a Programmable Logic Controller (PLC), a switching value output module of the Programmable Logic Controller (PLC) is connected with a coil end of the first electric control valve 10, and the Programmable Logic Controller (PLC) controls the opening degree of the first electric control valve 10 according to a current signal received from the first electric control valve 10 so as to control the flow rate of hot water in the hot water tank 11; the second electrical control valve 13 is controlled by a Programmable Logic Controller (PLC), a switching value output module of the Programmable Logic Controller (PLC) is connected to a coil end of the second electrical control valve 13, and the Programmable Logic Controller (PLC) controls an opening degree of the second electrical control valve 13 according to a current signal received from the second electrical control valve 13, so as to control a hot water flow rate of the heating water tank 14. Wherein, the oil cooler 6 is an air-cooled oil cooler which is commercially available; the lithium bromide unit 16 is a commercially available product; the heat exchanger 3 is a plate heat exchanger sold in the market; the built-in electric heater 15 of the heating water tank 14 is a commercially available immersion electric heater; the oil-gas separator 2 is a commercially available product.
The first embodiment is as follows:
when the waste heat utilization system of the air compressor in the offshore heavy oil field is used, high-temperature oil gas discharged by the air compressor 1 of the oil-way system is separated from compressed air in the oil-gas separator 2, the separated high-temperature lubricating oil flows into the heat exchanger 3, exchanges heat with cold water flowing in through the water replenishing pipeline 18 in the heat exchanger 3 and flows out, and then enters the oil cooler 6 after passing through the temperature sensor 4 and the temperature control valve 5; if the temperature of the lubricating oil after heat exchange is higher than a set value, the temperature control valve 5 opens an oil way, so that the lubricating oil returns to the air compressor head 1 through the oil cooler 6 and the oil filter 8; if the temperature of the lubricating oil after heat exchange is lower than a set value, the temperature control valve 5 opens an oil way, so that the lubricating oil returns to the air compressor head 1 through the oil filter 8. The water in the waterway system, which is subjected to heat exchange by the heat exchanger 3, flows out of the heat exchanger 3, is divided into two paths by the three-way valve 9, and one path of water passes through the first electric regulating valve 10 and the hot water tank 11 to a platform life building user 12 and is used for hot water for bathing of platform life building staff or daily life. And the other path of the refrigerant passes through a second electric regulating valve 13, a heating water tank 14, an electric heater 15 and a lithium bromide refrigerating unit 16 to a room 17 of the platform life building and is used for refrigerating the room of the platform life building.
Example two:
in a certain heavy oil field in the Bohai sea, the loading rate of an air compressor is 80%, the water inlet temperature in a water tank is set to be 5 ℃, the water outlet temperature is 70 ℃, heated hot water is sent to a living building of a platform for workers to take a bath, the number of people taking a bath in each shift is 20, the waste heat recovery of the air compressor can generate hot water with the temperature of 70 ℃ per hour by about 2.29 tons, accordingly, 4147-degree electric energy is saved every day, the electricity cost which can be saved every year is converted into RMB which is 89.6 RMB, the electricity cost is saved in the whole project period and is converted into RMB which is 2240 RMB, and the economic benefit is obvious.
The content that is not described in this embodiment is the prior art, and therefore, the description thereof is omitted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (2)

1. A waste heat utilization system of an air compressor in an offshore heavy oil field is characterized by mainly comprising an oil path system and a water path system for waste heat recovery;
the oil circuit system is formed by connecting an air compressor head, an oil-gas separator, a heat exchanger, a temperature sensor, a temperature control valve, an oil cooler, a three-way valve and an oil filter; the inlet of the air compressor head is connected with the outlet of the oil filter, and the outlet of the air compressor head is connected with the inlet of the oil-gas separator; the outlet of the oil-gas separator is connected with the hot oil inlet of the heat exchanger; a hot oil outlet of the heat exchanger is connected with an inlet of a temperature sensor, and an outlet of the temperature sensor is connected with an inlet of a temperature control valve; an outlet at one end of the temperature control valve is connected with an inlet of an oil cooler, and an outlet of the oil cooler is connected with an inlet at one end of the three-way joint; the outlet at the other end of the temperature control valve is connected with the inlet at the other end of the three-way joint; the outlet of the three-way joint is connected with the inlet of the oil filter; a cold water inlet of the heat exchanger is connected with a water replenishing pipeline;
the waterway system is composed of two branch mechanisms connected in series with the heat exchanger, wherein one branch mechanism is formed by connecting a hot water outlet of the heat exchanger in series through a three-way valve, a first electric regulating valve, a hot water tank and a user of the platform life building in sequence and is used for bathing or daily life water of the staff of the platform life building; the other branch mechanism is formed by connecting a hot water outlet of a heat exchanger in series with the platform living building through a three-way valve, a second electric regulating valve, a heating water tank, an electric heater and a lithium bromide refrigerating unit in sequence, and is used for refrigerating the platform living building; the first electric regulating valve is controlled by a Programmable Logic Controller (PLC), a switching value output module of the PLC is connected with a coil end of the first electric regulating valve, and the PLC controls the opening of the first electric regulating valve according to a current signal received by the first electric regulating valve so as to control the flow of hot water in the hot water tank; the second electric control valve is controlled by a Programmable Logic Controller (PLC), a switching value output module of the Programmable Logic Controller (PLC) is connected with a coil end of the second electric control valve, and the Programmable Logic Controller (PLC) controls the opening of the second electric control valve according to a current signal received by the second electric control valve so as to control the hot water flow of the heating water tank.
2. The offshore heavy oil oilfield air compressor waste heat utilization system of claim 1, wherein the oil cooler is an existing commercially available air-cooled oil cooler; the lithium bromide unit is a product sold in the market; the heat exchanger is a plate heat exchanger sold in the market; the built-in electric heater of the heating water tank is an immersion electric heater sold in the market; the oil-gas separator is a product sold in the market at present.
CN201920969085.2U 2019-06-26 2019-06-26 Residual heat utilization system for air compressor of offshore heavy oil field Active CN210164648U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112050496A (en) * 2020-08-20 2020-12-08 马小勇 Industrial waste heat renewable energy recovery process
CN112524670A (en) * 2020-11-27 2021-03-19 浙江先博节能科技有限公司 Energy-saving system and method for heating based on air compressor waste heat recovery transformation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112050496A (en) * 2020-08-20 2020-12-08 马小勇 Industrial waste heat renewable energy recovery process
CN112524670A (en) * 2020-11-27 2021-03-19 浙江先博节能科技有限公司 Energy-saving system and method for heating based on air compressor waste heat recovery transformation

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