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300mwcfb boiler for burning oil shale and its layout method

An oil shale and boiler technology, which is applied in the field of 300MWCFB boilers, can solve the problems of difficult design of large-capacity boilers, great influence of combustion in the furnace, and strong abrasion of oil shale, so as to reduce the amount of ignition oil and prolong the residence time. , mixed effect

Active Publication Date: 2018-02-13
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because oil shale has strong abrasiveness, high volatile content, easy ignition, difficult burnout, and low calorific value, it has a great influence on the combustion in the furnace, and the design of large-capacity boilers is also difficult. Therefore, oil shale is used as fuel. 300MWCFB boiler technology has no related products

Method used

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  • 300mwcfb boiler for burning oil shale and its layout method
  • 300mwcfb boiler for burning oil shale and its layout method
  • 300mwcfb boiler for burning oil shale and its layout method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0020] A 300MW CFB boiler for burning oil shale, which consists of: a boiler body, the front of the boiler body is provided with a square furnace 1, and a pot is arranged directly above the square furnace and in the center of the furnace. A cylinder 11, a slag cooler 9 and an under-bed start-up burner 10 are provided below the square furnace, and a water cooling screen 5, a high-temperature reheater 6 and a high-temperature superheater 7 are arranged in the central area of ​​the upper space in the square furnace, Both sides of the square furnace are symmetrically arranged with steam-water separators 3, the upper part of the steam-water separator is connected to the square furnace through the inlet flue 2, and the lower part of the steam-water separator is connected to the square furnace through the return valve 8, The steam-water separator communicates with the tail wall superheater 14 through the outlet flue 4 .

Embodiment 2

[0022] According to the 300MW CFB boiler for burning oil shale described in Embodiment 1, the described wall-enclosed superheater is arranged directly behind the square furnace, and the described wall-enclosed superheater is divided into front and rear two flues, and the described A low-temperature reheater and an economizer A18 are arranged sequentially from top to bottom in the front flue of the wall superheater, and a medium-temperature superheater 15, a low-temperature superheater 16, and an economizer are arranged in sequence from top to bottom in the rear flue of the wall superheater. Coal boiler B19, the economizer ash hopper 20 is located below the wall-enclosed superheater, the SCR device 21 is connected behind the economizer ash hopper, and an air preheater 12 is installed under the SCR device. The air preheater is connected to the square furnace through the hot air duct, and the flue gas outlet and air inlet of the air preheater are respectively connected to the flue...

Embodiment 3

[0024] According to the 300MW CFB boiler for burning oil shale described in Embodiment 1 or 2, the centerline of the square furnace coincides with the centerline of the boiler body, the slag cooler is drawn from the left side of the square furnace, and the The starter under the bed is led out from the right side of the square furnace, the wall-enclosed superheater is square, and the centerline of the wall-enclosed superheater coincides with the centerline of the boiler.

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Abstract

The invention relates to a 300MWCFB boiler and a distribution method for oil shale for combustion. Implementation of upsizing of a circulating fluidized bed boiler for the oil shale for combustion becomes an important topic for technological development of the circulating fluidized bed boiler. The 300MWCFB boiler for the oil shale for combustion comprises a boiler body; a boiler cylinder (11) is arranged above a square hearth and along the center of the hearth; a slag cooler (9) and an under-bed start-up burner (10) are arranged below the square hearth; a water cooling screen (9), a high-temperature re-heater (6) and a high-temperature super-heater (7) are arranged in the center area of the upper space in the square hearth; steam and water separators (3) are symmetrically arranged at the two sides of the square hearth; the upper parts of the steam and water separators are connected with the square hearth via inlet flues (2); the lower parts of the steam and water separators are connected with the square hearth via material returning valves (8); the steam and water separators are used for connecting a steam and cold separator with a tail enclosure wall super-heater (14) via outlet flues (4). The invention discloses the 300MWCFB boiler which is applicable to the oil shale for combustion.

Description

Technical field: [0001] The invention relates to a 300MW CFB boiler for burning oil shale. Background technique: [0002] my country has large reserves of oil shale. The traditional oil shale energy utilization process has high cost and low utilization rate. Small-grained oil shale cannot be refined. About 30% of oil shale cannot be refined and needs to be discharged and stacked on site. It has caused extremely serious environmental pollution, and the use of oil shale as fuel for coal-fired power plants can realize the comprehensive utilization of oil shale, reduce environmental pollution, and help solve the problems of fuel shortage and oil shale accumulation, which has far-reaching social benefits; oil shale has not been able to be used as fuel for pulverized coal boilers due to problems such as unreliable pulverization system, ash accumulation, ash plugging, severe corrosion, and difficulty in stable combustion, while circulating fluidized bed combustion technology can be u...

Claims

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Application Information

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IPC IPC(8): F22B31/00F23C10/10F23C10/18
CPCF22B31/0007F23C10/10F23C10/18F23C2206/10F23C2900/99004
Inventor 姜雪姜孝国王君峰高新宇王刚
Owner HARBIN BOILER
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