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Oil field steam filling boiler of circulation fluidized bed using water coal slurry as fuel

A technology of circulating fluidized bed and steam injection boiler, which is applied in the direction of fluidized bed combustion equipment, the combustion of lump fuel and liquid fuel, and the fuel burned in the molten state to achieve the effect of suppressing emissions

Inactive Publication Date: 2006-09-20
SHENYANG DAVID ENVIRONMENT PROTECTION & ENERGY SAVING EQUIP LTD
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AI Technical Summary

Problems solved by technology

Can water coal slurry replace fuel oil or natural gas, create a boiler that produces 7-25 tons of 17.5MPa-21MPa high-pressure steam per hour for use in oil fields, and achieve clean combustion, this technical problem has not yet been resolved

Method used

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  • Oil field steam filling boiler of circulation fluidized bed using water coal slurry as fuel
  • Oil field steam filling boiler of circulation fluidized bed using water coal slurry as fuel

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Embodiment Construction

[0038] The present invention has been used to produce 17.5MPa pressure, rated evaporation of 7t / h, 10t / h, 15t / h, 20t / h, 25t / h circulating fluidized bed oil field steam injection boilers using coal water slurry as fuel. Only take the 20t / h boiler as an example to illustrate the implementation of the present invention:

[0039] (1) Use of fuel

[0040] Coal water slurry meeting GB / 718855-2002 standard: solid phase concentration 66%, viscosity: 1.2pas, coal powder average particle size d50: 38-45μm, ash content: 6%, sulfur content: 0.35%, volatile content > 30% , calorific value 20935k J / kg.

[0041] (2) The 20t / h, 17.5MPa circulating fluidized bed oil field steam injection boiler with coal-water slurry as fuel manufactured according to the boiler structure described in the content of the present invention is supplied from the upper part of the boiler body with a high position to the furnace by a screw pump Coal water slurry, the water supply coal slurry pressure is 0.3MPa; the...

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Abstract

The oil well gas injecting boiler has screw pump in pressure of 0.2-0.4 MPa to supply fuel from the upper part of the boiler, single steam drum in naturally circulating mode to obtain high pressure steam of 17.5-21 MPa; quartzite and limestone powder as fuidizing medium for low multiplying factor circulation; and power amount of limestone powder for clean burning at temperature of 850-950 deg.c. The boiler of the present invention has water cooling furnace wall, coated heat resistant and corrosion resistant refractory material and sprayed heat resistant and wear resistant Ni-Cr alloy, pipe type backwards bent boiler top, coal economizer of ribbed spiral pipes, cyclonic separator with wear resistant material, water cooling wall with inner thread pipe, high temp alloy steel material in high temperature and high pressure sections, welded support frame structure, flexible 3D expanding section in important joint part, and hydrostats.

Description

technical field [0001] According to the International Patent Classification Table, the present invention belongs to the technical field of fluidized bed combustion equipment in fluid fuel combustion equipment, and particularly relates to a circulating fluidized bed boiler with a rated evaporation capacity of 7-25 tons per hour using coal water slurry as fuel. It can generate high-pressure steam of 17.5-21MPa, which is mainly used for steam injection in oil fields. Background technique [0002] After many years of exploitation of the oil stored underground in the oil field, high-temperature, high-pressure steam is usually injected into the ground to increase production, or to extract oil that cannot be extracted by other methods. At present, steam injection boilers in oilfields use oil or natural gas as energy sources, and the operating costs are high. Based on a medium-sized steam boiler with a pressure of 17.5MPa and 20 tons per hour, 66.5kg of fuel oil is consumed for pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23C10/22F23C101/00F23C1/02
Inventor 张大伟杨祖义
Owner SHENYANG DAVID ENVIRONMENT PROTECTION & ENERGY SAVING EQUIP LTD
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