CN203686992U

CN203686992U - Dedicated energy-saving flue gas waste heat utilization recovering system for oil fields

Info

Publication number: CN203686992U
Application number: CN201320861470.8U
Authority: CN
Inventors: 石昱; 杨青; 刘红军; 樊明果
Original assignee: XINJIANG WEST MINGZHU ENGINEERING CONSTRUCTION Co Ltd
Current assignee: XINJIANG WEST MINGZHU ENGINEERING CONSTRUCTION Co Ltd
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-07-02
Anticipated expiration: 2023-12-23

Abstract

The utility model discloses a dedicated energy-saving flue gas waste heat utilization recovering system for oil fields. The dedicated flue energy-saving gas waste heat utilization recovering system for oil fields comprises a furnace shell, a chimney, a combustor, a blower, a hot air conveying pipe, as well as a radiation section and a convection section which are arranged inside the furnace shell; an air outlet pipe orifice in one end of the hot air conveying pipe is communicated with the air inlet of the blower, the air outlet of the blower is communicated with the air inflow port of the combustor, the combustor has a self-contained injection orifice communicated with the radiation section, and the radiation section is communicated with the chimney through the convection section; the dedicated energy-saving flue gas waste heat utilization recovering system further comprises a gravity heat pipe and an air overflow pipe, the gravity heat pipe is fixedly arranged on the furnace wall belonging to the convection section, a heated pipeline section of the gravity heat pipe extends into the convection section after passing through the furnace wall of the convection section and a heat emission pipeline section of the gravity heat pipe extends into the pipe cavity of the air overflow pipe after passing through the pipe wall of the air overflow pipe, the pipe orifice at one end of the air overflow pipe is communicated with the atmospheric air outside the furnace shell, and the other end of the air overflow pipe is communicated with the air inlet pipe orifice at the other end of the hot air conveying pipe. According to the utility model, the flue gas waste heat recovery efficiency and the fuel saving rate can be further improved.

Description

Energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system

Technical field

The utility model belongs to the improvement of boiler structure, particularly energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system.

Background technology

Oil field Special-purpose steam boiler is that its design thermal efficiency is more than 85% for the key equipment of heavy oil exploitation.Oil field Special-purpose steam boiler heat loss is mainly heat loss due to exhaust gas, boiler radiation loss and non-complete combustion of fuel heat loss, and heat loss due to exhaust gas portion maximum wherein accounts for the 90.5%-97.5% of whole boiler heat loss amount.Can be calculated and know through heat loss due to exhaust gas theory: flue-gas temperature rising its heat loss amount is also risen, 15 DEG C-20 DEG C of the every risings of exhaust gas temperature, boiler thermal output reduces approximately 1 percentage point, so, Special-purpose steam boiler its flue gas waste heat recovery efficiency in existing oil field is still not high enough, gas saving is lower, and operating cost is corresponding higher.

Utility model content

The purpose of this utility model is to provide a kind of energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system, can improve more significantly the temperature of burning air used, further improves flue gas waste heat recovery efficiency and gas saving.

The purpose of this utility model is achieved in that a kind of energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system, comprises furnace shell, chimney, burner, air blast, hot blast conveying pipe and is placed in radiant section, the convection section in furnace shell; The air outlet tube mouth of hot blast conveying pipe one end is communicated with blower inlet, and the air outlet of air blast is communicated with the air influent stream mouth of burner, and the jet that burner self has is communicated with radiant section, and radiant section is communicated with chimney by convection section; In the time of burner operation, the jet of burner can inject flames in radiant section; Also comprise gravity assisted heat pipe and air flow tube, furnace wall under convection section is fixedly installed gravity assisted heat pipe, what gravity assisted heat pipe had be heated, and the furnace wall of pipeline section under convection section stretch in convection section and its heat release pipeline section having stretches in air flow tube tube chamber through air flow tube tube wall, air flow tube one end mouth of pipe is communicated with the atmospheric air being positioned at outside furnace shell, and the other end mouth of pipe of air flow tube is communicated with the air intake pipe orifice of the hot blast conveying pipe other end; In the time that energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system is worked, the atmospheric air being positioned at outside furnace shell is forced suction air flow tube tube chamber by air blast, in convection section, to the mobile flue gas institute heat content of chimney, by gravity assisted heat pipe, it has successively that be heated pipeline section and its heat release pipeline section having conducts to the air that is positioned at air flow tube tube chamber and hot blast conveying pipe to be flowed into, and even air after air blast absorbs heat the most at last enters in radiant section through air flow tube, hot blast conveying pipe, air blast and burner drainage successively.

When the utility model work, the negative pressure that air blast produces at hot blast conveying pipe can make resistance suffered in the time that air flow tube overcomes the resistance that gravity assisted heat pipe heat release pipeline section applies to it passively and flows in hot blast conveying pipe to the air that flows in hot blast conveying pipe and just absorbing heat, after crossing convection section, the smoke gas flow producing after natural gas burns in radiant section carries out heat exchange with the pipeline section that is heated of gravity assisted heat pipe, its contained most heats are passed to the pipeline section that is heated of power heat pipe, the Gas phase Smoke that flows through convection section is discharged in atmosphere through chimney after should lowering the temperature, the heat that the pipeline section that is heated of gravity assisted heat pipe absorbs it upwards passes to the heat release pipeline section of gravity assisted heat pipe, enter air flow tube and treated that the heat release pipeline section of the air mobile to hot blast conveying pipe and gravity assisted heat pipe carries out heat exchange, then absorb the heat that the heat release pipeline section of gravity assisted heat pipe discharges and heat up, finally successively through air flow tube, hot blast conveying pipe, air blast and burner flow in radiant section (burner hearth).The utility model still utilizes fume afterheat to enter the air of radiant section with heating, but can improve more significantly the temperature of burning air used, thereby can reduce exhaust gas temperature, heat loss due to exhaust gas is reduced, can improve again the thermal efficiency, simultaneously again can indirect saving fuel, it can further improve flue gas waste heat recovery efficiency and gas saving.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 be the utility model overall face structural representation.

Detailed description of the invention

A kind of energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system, as shown in Figure 1, comprises furnace shell 11, chimney 1, burner 10, air blast 9, hot blast conveying pipe 7 and is placed in radiant section 8, the convection section 6 in furnace shell 11; The air outlet tube mouth of hot blast conveying pipe 7 one end is communicated with air blast 9 air inlets, and the air outlet of air blast 9 is communicated with the air influent stream mouth of burner 10, and the jet that burner 10 has self is communicated with radiant section 8, and radiant section 8 is communicated with chimney 1 by convection section 6; In the time that burner 10 is worked, the jet of burner 10 can inject flames in radiant section 8; Also comprise gravity assisted heat pipe 4 and air flow tube 2, furnace wall under convection section 6 is fixedly installed gravity assisted heat pipe 4, what gravity assisted heat pipe 4 had be heated, and the furnace walls of pipeline section 5 under convection section 6 stretch into convection section 6 in and its heat release pipeline section 3 having passes air flow tube 2 tube walls and stretches in air flow tube 2 tube chambers, air flow tube 2 one end mouths of pipe are communicated with the atmospheric air being positioned at outside furnace shell 11, and the other end mouth of pipe of air flow tube 2 is communicated with the air intake pipe orifice of hot blast conveying pipe 7 other ends; In the time that energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system is worked, the atmospheric air being positioned at outside furnace shell 11 is forced suction air flow tube 2 tube chambers by air blast 9, at convection section 6, interior to the mobile flue gas institute heat content of chimney 1, by gravity assisted heat pipe 4, it has successively is heated pipeline sections 5 and its heat release pipeline section 3 conduction that have to the air that is positioned at air flow tube 2 tube chambers and hot blast conveying pipe to be flowed into 7, and even air after air blast 9 absorbs heat the most at last enters in radiant section 8 through air flow tube 2, hot blast conveying pipe 7, air blast 9 and burner 10 drainages successively.

As shown in Figure 1, the tubulose heat-insulation layer around its body is being set on hot blast conveying pipe 7 periphery walls; When air blast 9 forces to make air from 2 heat absorptions of air flow tube hot blast conveying pipe 7 is interior while flowing to air blast 9 air inlets, the air that tubulose heat-insulation layer can reduce after heat absorption conducts to the heat outside tubulose heat-insulation layer through hot blast conveying pipe 7 pipe perisporiums, so that the after-heat of the contained heat except conducting to tubulose heat-insulation layer of air after heat absorption flows into air blast 9 air inlets to the mobile air driven of air blast 9 air inlets through hot blast conveying pipe 7 hot blast conveying pipe 7 is interior after can only being absorbed heat.

Claims

1. an energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system, comprises furnace shell (11), chimney (1), burner (10), air blast (9), hot blast conveying pipe (7) and is placed in radiant section (8), the convection section (6) in furnace shell (11), the air outlet tube mouth of hot blast conveying pipe (7) one end is communicated with air blast (9) air inlet, the air outlet of air blast (9) is communicated with the air influent stream mouth of burner (10), the jet that burner (10) has self is communicated with radiant section (8), and radiant section (8) is communicated with chimney (1) by convection section (6), in the time that burner (10) is worked, the jet of burner (10) can inject flames in radiant section (8), it is characterized in that: also comprise gravity assisted heat pipe (4) and air flow tube (2), furnace wall under convection section (6) is fixedly installed gravity assisted heat pipe (4), the pipeline section that is heated (5) that gravity assisted heat pipe (4) has stretches in convection section (6) through the furnace wall under convection section (6) and its heat release pipeline section (3) having stretches in air flow tube (2) tube chamber through air flow tube (2) tube wall, air flow tube (2) one end mouth of pipe is communicated with the atmospheric air being positioned at outside furnace shell (11), the other end mouth of pipe of air flow tube (2) is communicated with the air intake pipe orifice of hot blast conveying pipe (7) other end, in the time that energy-saving oil field Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system is worked, the atmospheric air being positioned at outside furnace shell (11) is forced suction air flow tube (2) tube chamber by air blast (9), in convection section (6), to the mobile flue gas institute heat content of chimney (1), by gravity assisted heat pipe (4), its pipeline section that is heated (5) having and its heat release pipeline section (3) having conduct to the air that is positioned at air flow tube (2) tube chamber and hot blast conveying pipe to be flowed into (7) successively, and even the air after air blast (9) absorbs heat is the most at last successively through air flow tube (2), hot blast conveying pipe (7), air blast (9) and burner (10) drainage enter in radiant section (8).

2. energy-saving oil field according to claim 1 Special smoke gas UTILIZATION OF VESIDUAL HEAT IN recovery system, is characterized in that: on hot blast conveying pipe (7) periphery wall, the tubulose heat-insulation layer around its body is being set, in the time that air blast (9) forces to make air from air flow tube (2) heat absorption mobile to air blast (9) air inlet hot blast conveying pipe (7) in, the air that tubulose heat-insulation layer can reduce after heat absorption conducts to the heat outside tubulose heat-insulation layer through hot blast conveying pipe (7) pipe perisporium, so that the after-heat of the contained heat except conducting to tubulose heat-insulation layer of air after heat absorption can only be flowed into air blast (9) air inlet to the mobile air driven of air blast (9) air inlet through hot blast conveying pipe (7) after heat absorption in hot blast conveying pipe (7).