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Double flow circulating fluidized bed steam injection boiler with buried pipe and evaporation coil

A circulating fluidized bed and evaporating coil technology, which is applied in steam boilers, boiler water pipes, steam generation, etc., can solve the problems of heat transfer deterioration, water-cooled wall tubes are prone to salt scale formation, and pipe bursts, etc., to eliminate the disadvantages of pipe bursts , to ensure safe and stable operation, and to solve the effect of pipe burst problems

Active Publication Date: 2016-06-29
哈尔滨红旗锅炉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing natural circulation oil field steam injection boiler has the problem that the inner wall of the water wall tube is prone to salt scale, which will lead to the deterioration of heat transfer and the tube burst in the long run, and further provides a buried tube and evaporation coil double flow circulating fluidized bed steam injection boiler

Method used

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  • Double flow circulating fluidized bed steam injection boiler with buried pipe and evaporation coil
  • Double flow circulating fluidized bed steam injection boiler with buried pipe and evaporation coil
  • Double flow circulating fluidized bed steam injection boiler with buried pipe and evaporation coil

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specific Embodiment approach 1

[0018] Specific implementation mode one: as Figure 1~Figure 4As shown, the double-flow circulating fluidized bed steam injection boiler with buried pipe and evaporation coil includes furnace body 1, connecting pipe 1, coal inlet 5, economizer water outlet main pipe 7, low-velocity bed air chamber 11, primary Air duct 12, secondary air duct 13, secondary air pipe 14, cyclone separator 15, connecting pipe six 16, steam connecting pipe 17, superheater 19, DC evaporator 20, economizer 21, secondary air air preheater Heater 22, primary air preheater 23, return valve 24, high-speed bed air chamber 25, sewage pipe 27, steam drum 29, tail flue 30, slag discharge pipe 31, low-speed bed air distribution plate 41, high-speed bed Air distribution plate 42, two connecting pipes two 4 and two connecting pipes three 6; the furnace body 1 is a circulating fluidized bed; the steam drum 29 is provided with a steam-water separator 28, and the furnace body A high-speed bed air chamber 25 is pro...

specific Embodiment approach 2

[0020] Specific implementation mode two: as figure 1 As shown, the double-flow circulating fluidized bed steam injection boiler with buried pipes and evaporation coils described in the first embodiment, the steam connecting pipe 17 is equipped with an electric valve one 39, and the connecting pipe seven 37 An electric valve 2 40 is installed on it to ensure the resistance balance of the superheater 19 and the evaporator 20, thereby realizing system pressure balance.

specific Embodiment approach 3

[0021] Specific implementation mode three: as figure 1 As shown, in the double-flow circulating fluidized bed steam injection boiler with buried pipes and evaporation coils described in Embodiment 1, the number of the evaporation coils 3 is 1 to 6, and the outer diameter of the evaporation coils 3 is (diameter) is Φ51mm~Φ108mm to meet the needs of steam injection boilers with a capacity of 7~130t / h.

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Abstract

The invention provides a double-direct-current circulating fluidized bed steam injection boiler with buried pipes and evaporation coils, and belongs to the technical field of oil field steam injection boilers. The problem that heat transformer deterioration and pipe explosions can be caused when the inner walls of water-cooling wall pipes are prone to salt scale for a long time in existing natural circulation oil field steam injection boilers is solved. The buried pipes are arranged in a low-speed bed in a furnace body. The evaporation coil is wound around the inner circumferential side wall of the furnace body to form a hearth water-cooling wall. The evaporation coil is communicated with upper collection boxes which are communicated with a steam-water separator in a steam pocket. Steam-water separation is conducted on a steam and water mixture entering the steam pocket through the steam-water separator, water which is separated out enters water space of the steam pocket, steam which is separated out enters steam space of the steam pocket, the water space of the steam pocket is communicated with an evaporator, the evaporator is communicated with an external centrifugal separator through a fourth connection pipe, the external centrifugal separator is communicated with a mixer through a seventh connection pipe, the superheated steam outlet of a superheater is communicated with the mixer, and the steam space of the steam pocket is communicated with the air inlet of the superheater. The double-direct-current circulating fluidized bed steam injection boiler is used for oil field steam injection.

Description

technical field [0001] The invention relates to a circulating fluidized bed steam injection boiler, which belongs to the technical field of oil field steam injection boilers. Background technique [0002] Most of the existing steam injection boilers in oilfields are oil-fired and gas-fired direct-flow steam-injection boilers. In order to save operating costs, some units have developed coal-fired seam-fired direct-flow steam injection boilers. The implementation of the pollutant discharge standard GB13271-2014 has made the layer-fired steam injection boiler lose the favor of the market. This is because the NOx emission concentration of the layer-fired furnace is much higher than the existing emission standard, and the furnace cannot desulfurize, which makes the environmental protection investment even high. Investment in the boiler itself. So people turn their attention to circulating fluidized bed boilers, because the NOx emission concentration of circulating fluidized bed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22B31/00F22B37/10F22D1/00
Inventor 别如山顾文波宋兴飞纪晓瑜陈佩房点李鹏坤
Owner 哈尔滨红旗锅炉有限公司
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