CN201292827Y - Single-chamber direct combustion type liquid nitrogen evaporator - Google Patents

Abstract

The utility model relates to a single-chamber direct-combustion liquid nitrogen evaporator which belongs to an evaporating device converting high-pressure liquid nitrogen into high-pressure nitrogen in a fuel heating way in the field of petroleum drilling, can overcome the defects of less emission, low working pressure, instable working performance, complex control system and poor security in the prior liquid evaporation device and can be widely applied on a liquid nitrogen device. The single-chamber direct-combustion liquid nitrogen evaporator mainly comprises a wind-power supply assembly, an oil-gas mixing assembly, a combustion chamber inner cavity, a combustion chamber outer cavity, a coil pipe cavity and a control box; the main structure of the single-chamber direct-combustion liquid nitrogen evaporator is made of stainless steel materials; the wind-power supply assembly drives a fan by a hydraulic motor; the oil-gas mixing assembly comprises an igniter and an oil injection nozzle which are arranged on a mounting plate; a shell of the combustion chamber inner cavity is designed into a cylindrical shape and is provided with a fire-extinguishing hole, and fire clay is paved inside the combustion chamber inner cavity; a shell of the combustion chamber outer cavity is also designed into a cylindrical shape; a coil pipe with fins is arranged in the coil pipe cavity, and the periphery of the coil pipe cavity adopts asbestos insulation materials; and a fuel oil system, a gas feeding system, a flow control member and a temperature measuring and controlling device are arranged in the control box.

Description

The direct-fired liquid nitrogen vaporization device of single chamber

Technical field

The utility model relates to the evaporation equipment that changes into high pressure nitrogen in a kind of field of oil drilling with the fuel Heating high-pressure liquid nitrogen.

Background technology

In the modern petroleum industry, the fast development of nitrogen technology makes it be widely used in many links of Petroleum Production.Compare with conventional method, utilize nitrogen that oil well, oil reservoir are handled, have safely, save time, fast, efficiently, characteristics that success rate is high, be not only applicable to conventional oil reservoir, in particular oils gas reservoirs such as low pressure, hypotonic, clay gluing, original effect is arranged also., good stability low based on density of nitrogen, squeezable characteristics, it is having a wide range of applications aspect recovery ratio, drilling well, perforation, well stimulation, the well workover improving.Conventional liquid nitrogen vaporization equipment, the discharge capacity of nitrogen is less, less than 30 cubic metres of per minutes; Operating pressure is not high, the highest 35 MPas; The service behaviour instability; The control system complexity need install extra propane auxiliary ignition system additional; Poor stability does not have Mars to put out device, and is dangerous outside the fuel oil possibility discharge apparatus, is difficult to satisfy the high safety requirements of oil gas operation.Along with the increase of present petroleum exploration and development dynamics, need the liquid nitrogen vaporization equipment that discharge capacity is big, pressure is high, security performance is high to satisfy construction requirement.

The utility model content

The purpose of this utility model provides the direct-fired liquid nitrogen vaporization device of a kind of single chamber, overcomes that existing liquid nitrogen vaporization equipment discharge capacity is less, operating pressure is not high, service behaviour is unstable, control system is complicated, the deficiency of poor stability.

The utility model is achieved through the following technical solutions above-mentioned purpose: the direct-fired liquid nitrogen vaporization device of a kind of single chamber, mainly be made up of wind-force provisioning component, oil gas electric hybrid module, combustion chamber inner chamber, combustion chamber exocoel, coil pipe chamber, control cabinet, agent structure adopts stainless steel material; The wind-force provisioning component is by the fluid motor-driven fan; The oil gas electric hybrid module comprises igniter and the atomizer that is contained on the installing plate; Combustion chamber inner chamber housing is designed to cylindric and is provided with fire extinguishing hole, combustion chamber inner chamber laid inside seat clay; Cavity shell also is designed to cylindric outside the combustion chamber; The coil pipe that has fin is installed, the peripheral asbestos insulation material that adopts in the coil pipe chamber; Fuel oil system, plenum system, flow control member and temperature measurement and control instrument are housed in the control cabinet, and wherein fuel oil system is made up of main fuel system and auxiliary fuel system.

The beneficial effect that the utility model is had compared with the prior art is: the nitrogen discharge capacity is big, can reach 170 cubic metres of per minutes; Operating pressure height, continuous firing pressure are 103.5 MPas; Full-automatic monitoring; Adopt the igniting of auxiliary fuel system, need not to use auxiliary ignition devices such as propane, reduced element of construction; Adopt novel flame to put out structure, improved safety.

Description of drawings

Fig. 1 is a dimension sketch of the present utility model.

Fig. 2 is a structure sectional view of the present utility model.

Fig. 3 is a fuel oil system schematic diagram of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described:

The direct-fired liquid nitrogen vaporization device of a kind of single chamber, mainly form by wind-force provisioning component, oil gas electric hybrid module, combustion chamber inner chamber 5, combustion chamber exocoel 6, coil pipe chamber 8, control cabinet 11, agent structure adopts stainless steel material, can satisfy the requirement of liquid nitrogen cryogenics high pressure and combustion chamber high temperature; The wind-force provisioning component is used to provide air-flow by hydraulic motor 1 drive fan 2; The oil gas electric hybrid module comprises 4 igniters and 3 atomizers that are contained on the installing plate, and atomizer 3 is used to provide oil gas mixture; Inner chamber 5 housings in combustion chamber are designed to cylindric and are provided with fire extinguishing hole 7, and inner chamber 5 laid inside seat clays in combustion chamber are spaces of oil gas mixture burning; Exocoel 6 housings in combustion chamber also are designed to cylindric, and combustion chamber exocoel 6 provides flame and puts out air-flow and heat insulation space; The coil pipe that has fin is installed in the coil pipe chamber 8, the peripheral asbestos insulation material that adopts, seat clay and asbestos insulation material can effectively stop the loss of heat, and prevent the scald accident; Fuel oil system, plenum system, flow control member and temperature measurement and control instrument are housed in the control cabinet 11, and wherein fuel oil system is made up of main fuel system and auxiliary fuel system, respectively by main fuel system control valve 13 and 12 controls of auxiliary fuel system control valve.

During igniting, open fan 2 earlier, low-speed running is opened plenum system, opens auxiliary fuel system control valve 12, and fuel oil and air spray into combustion chamber inner chamber 5 by atomizer 3, use igniter 4 light fluid fuel oils and Air mixing body.Open main fuel system control valve 13 then, strengthen the emitted dose of fuel oil gradually by adjusting flow control valve 14, press ratio simultaneously and increase fan 2 rotating speeds, high pressure fuel and pressure-air spray into combustion chamber inner chamber 5 and nebulize after atomizer 3 mixes vaporization, produce high temperature and heat in 5 burnings of combustion chamber inner chamber.Hydraulic motor 1 drive fan 2 produces air-flow, and air-flow enters the combustion chamber and is divided into two strands, and one air-flow directly enters combustion chamber inner chamber 5, helps oil inflame; One air-flow enters combustion chamber exocoel 6, enters combustion chamber inner chamber 5 rear portions by fire extinguishing hole 7, combustion chamber inner chamber 5 rear portions, produces and intercepts air-flow, stops combustion flame to enter coil pipe chamber 8, has improved the safety of operation greatly.High-pressure liquid nitrogen enters coil pipe by liquid nitrogen import 9, carries out sufficient interchange of heat with the heat that enters coil pipe chamber 8 through coil pipe and is evaporated to high pressure nitrogen, and high pressure nitrogen is discharged via nitrogen outlet 10.

Claims (1)

1. the direct-fired liquid nitrogen vaporization device of single chamber mainly is made up of wind-force provisioning component, oil gas electric hybrid module, combustion chamber inner chamber (5), combustion chamber exocoel (6), coil pipe chamber (8), control cabinet (11), it is characterized in that: agent structure adopts stainless steel material; The wind-force provisioning component is by hydraulic motor (1) drive fan (2); The oil gas electric hybrid module comprises igniter (4) and the atomizer (3) that is contained on the installing plate; Combustion chamber inner chamber (5) housing is designed to cylindric and is provided with fire extinguishing hole (7), combustion chamber inner chamber (5) laid inside seat clay; Combustion chamber exocoel (6) housing also is designed to cylindric; The coil pipe that has fin is installed, the peripheral asbestos insulation material that adopts in the coil pipe chamber (8); Control cabinet is equipped with fuel oil system, plenum system, flow control member and temperature measurement and control instrument in (11), and wherein fuel oil system is made up of main fuel system and auxiliary fuel system.

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