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Dual-direct-current circulating fluidized bed steam-injection boiler with vertical evaporating pipes inside

A circulating fluidized bed and steam injection boiler technology, which is applied in steam boilers, steam generation, lighting and heating equipment, etc., can solve the problems of heat transfer deterioration, tube burst, and water-cooled wall tubes are prone to salt scaling, etc., to ensure safety Stable operation and the effect of solving the problem of pipe burst

Active Publication Date: 2015-07-22
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 double-flow vertical evaporation tube in the furnace. Circulating fluidized bed steam injection boiler

Method used

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  • Dual-direct-current circulating fluidized bed steam-injection boiler with vertical evaporating pipes inside

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specific Embodiment approach 1

[0014] Specific implementation mode one: as figure 1 As shown, a double-flow circulating fluidized bed steam injection boiler with vertical evaporating tubes in the furnace includes a furnace body 1, a connecting pipe 2a, a connecting pipe 2b, an economizer outlet water main pipe 7, and two side walls (that is, the furnace body 1 Left and right side walls) connecting pipe 8, front and rear wall connecting pipe 9, primary air duct 12, secondary air duct 13, cyclone separator 15, steam connecting pipe 17, connecting pipe 3 18, superheater 19, evaporator 20, province Coal burner 21, secondary air air preheater 22, primary air air preheater 23, return valve 24, sewage pipe 27, tail flue 30, water cooling screen 31, connecting pipe four 34, external centrifugal separator 35 , connecting pipe six 36, mixer 37 and connecting pipe five 16; the furnace body 1 is a circulating fluidized bed, the bottom of the furnace body 1 is provided with a primary air chamber 26, and the bottom of th...

specific Embodiment approach 2

[0018] Specific implementation mode two: as figure 1 As shown in the specific embodiment 1, a double-flow circulating fluidized bed steam injection boiler with vertical evaporation tubes in the furnace described in the first embodiment, the steam connecting pipe 17 is equipped with an electric valve 1 38, and the connecting pipe 5 16 is equipped with Electric valve two 39 are installed. By fine-tuning the first electric valve 38 and the second electric valve 39, the resistance balance of the superheater 19 and the evaporator 20 is ensured, thereby realizing system pressure balance.

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Abstract

The invention discloses a dual-direct-current circulating fluidized bed steam-injection boiler with vertical evaporating pipes inside and belongs to the technical field of steam-injection boilers used in oil fields. The dual-direct-current circulating fluidized bed steam-injection boiler with the vertical evaporating pipes inside aims to solve the problem that according to existing natural-circulation steam-injection boilers used in the oil fields, salt deposition happens to the inner walls of water wall pipes, heat transfer deterioration is caused after long-term salt deposition, and pipe explosion is caused accordingly. According to the dual-direct-current circulating fluidized bed steam-injection boiler with the vertical evaporating pipes inside, a coal economizer is communicated with a lower collection box of a water cooling screen through a coal economizer water outlet header pipe, and an upper collection box of the water cooling screen is communicated with two side wall connecting pipes, a front wall connecting pipe and a rear wall connecting pipe; the two side wall connecting pipes are communicated with a steam drum through two side wall water wall lower collection boxes, a front wall membrane type water wall, a rear wall membrane type water wall, a front wall collection box and a rear wall connection box; the water space of the steam drum is communicated with a water inlet of an evaporator, a steam-water mixture outlet of the evaporator is communicated with a mixer through an external centrifugal separator, a superheated steam outlet of a superheater is communicated with the mixer, and the steam space of the steam drum is communicated with a steam inlet of the superheater. The dual-direct-current circulating fluidized bed steam-injection boiler with the vertical evaporating pipes inside inside is used for steam injection of the oil fields.

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 Applications(China)
IPC IPC(8): F22B31/08
Inventor 别如山宋兴飞别海培纪晓瑜陈佩房点李鹏坤顾文波
Owner 哈尔滨红旗锅炉有限公司
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