CN2273373Y - Preheat degree adjustable preheating pulverized-fuel burner - Google Patents

Preheat degree adjustable preheating pulverized-fuel burner Download PDF

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Publication number
CN2273373Y
CN2273373Y CN 96211946 CN96211946U CN2273373Y CN 2273373 Y CN2273373 Y CN 2273373Y CN 96211946 CN96211946 CN 96211946 CN 96211946 U CN96211946 U CN 96211946U CN 2273373 Y CN2273373 Y CN 2273373Y
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China
Prior art keywords
burner
coal
pulverized
utility
preheating
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Expired - Lifetime
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CN 96211946
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Chinese (zh)
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贾臻
童玉清
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Individual
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Abstract

The utility model relates to a preheating degree adjustable preheating pulverized-fuel burner. One end of the burner can be communicated with a furnace cavity, and the other end can be communicated with a dense pulverized-fuel flow duct. A return flow regulating valve gate can be arranged on the upper part of the communication point of the dense pulverized-fuel flow. A regulating valve can be arranged in the valve gate to adjust flow return intensity which is in the burner to meet different preheating effect having different degrees when coal kinds are different. The burner which is designed by the utility model not only can adapt to any change from anthracite coal to soft coal but also can strengthen the firing of pulverized fuel. The utility model has the advantages of strong burning auto-stability, high burning efficiency and low pollution.

Description

The pre-adjustable preheating type coal burner of temperature
The utility model relates to a kind of preheating type coal burner of adjustable pre-temperature, belongs to coal powder burning technology field.
The preheating type coal burner to the reinforcement of coal dust catch fire, overheavy firing, raising efficiency of combustion, economize on coal, fuel-economizing, increase coal adaptability and enlarge load regulation range, to reduce environmental pollution etc. significant.Existing preheating type coal burner, its structure are that the one end communicates with boiler furnace, and the other end communicates with the outlet of high concentration pulverized coal passage, form in burner and reflux, and reach the purpose to pulverized coal preheating.Its shortcoming is can not regulate according to the coal of burning the pre-temperature of coal dust, therefore when industrial use preheating burner, must be according to concrete coal, and the length of particular design burner and height, a kind of burner can only be used for single coal.
The purpose of this utility model is design a kind of pre-temperature adjustable preheating type coal burner, and the structure of existing coal burner is made improvements, and makes the temperature of wind powder in the burner adjustable, to be applicable to the burning of different coals.
The adjustable preheating moulded coal divided combustion device of pre-temperature of the utility model design, the one end communicates with burner hearth, and the other end communicates with thick coal culm stream pipeline, and the top communicate the place with thick coal culm stream has a capacity of returns control valve, and a control valve is housed in the valve.
The adjustable preheating type coal burner of pre-temperature of the utility model design, the pre-temperature that can flow the thick coal culm that enters burner is regulated, thereby make different coals can both obtain good flammability, can use same burner from the anthracite to bituminous coal, coal adaptability is wide, can strengthen catching fire of coal dust, the burning autostability is strong, regulate than big efficiency of combustion height, the low pollution.Be equipped with direct current secondary wind or swirl secondary air, can become once-through type or cyclone-type high concentration preheating type coal burner.
Description of drawings:
Fig. 1 is the structural representation of the coal burner of the utility model design.
Below in conjunction with accompanying drawing, introduce the content of the present utility model and the course of work in detail.Among Fig. 1, the 1st, capacity of returns control valve, its diameter are d 1, the 2nd, hearth wall, the 3rd, thick coal culm stream pipeline, its diameter is d n, the 4th, burner, its diameter are D, length is L.The 5th, be contained in the control valve on the capacity of returns control valve central shaft, in order to regulating the size of exhausting amount, and and then regulate circulating flow strength in the burner, do not obtain the different pre-heat effect of degree simultaneously in coal.
The cross section of burner can be circular, also can be square, i.e. square or rectangular.When cross section when being square, diameter D is height.Burner 4 can form the recirculating zone naturally, and nationality flows from the thick coal culm that pipeline 3 enters burner 4 with its preheating to extract the hot flue gas of combustion chamber, reaches and improves thick coal culm stream initial temperature, and then strengthen the purpose of catching fire.Top in pipeline 3 porch is provided with capacity of returns control valve 1, and control valve 5 is housed in it, to regulate the circulating flow strength in the burner 4, satisfies in coal not simultaneously the pre-heat effect that the degree that obtains is different.
In order to obtain best technique effect, the dimension scale of the diameter D of burner and the length L of burner is: Diameter D and thick coal culm stream pipe diameter d nDimension scale be 2.5, the diameter d of capacity of returns control valve 1With thick coal culm stream pipe diameter d nDimension scale be
Figure Y9621194600043
~0.5.
An embodiment of the present utility model is: L D = 1.6 , D d n = 2.05 , d 1 d n = 0.47

Claims (3)

1. preheating type coal burner that pre-temperature is adjustable, the one end communicates with burner hearth, and the other end communicates with thick coal culm stream pipeline, it is characterized in that having a capacity of returns control valve on the top that communicates the place with thick coal culm stream, and a control valve is housed in the valve.
2. burner as claimed in claim 1 is characterized in that the diameter D of wherein said burner and the dimension scale of burner length L are Diameter D and thick coal culm stream pipe diameter d nDimension scale be Capacity of returns control valve diameter d 1With thick coal culm stream pipe diameter d nDimension scale be
3. burner as claimed in claim 1, the cross section that it is characterized in that wherein said burner is for circular or square.
CN 96211946 1996-05-22 1996-05-22 Preheat degree adjustable preheating pulverized-fuel burner Expired - Lifetime CN2273373Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 96211946 CN2273373Y (en) 1996-05-22 1996-05-22 Preheat degree adjustable preheating pulverized-fuel burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 96211946 CN2273373Y (en) 1996-05-22 1996-05-22 Preheat degree adjustable preheating pulverized-fuel burner

Publications (1)

Publication Number Publication Date
CN2273373Y true CN2273373Y (en) 1998-01-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 96211946 Expired - Lifetime CN2273373Y (en) 1996-05-22 1996-05-22 Preheat degree adjustable preheating pulverized-fuel burner

Country Status (1)

Country Link
CN (1) CN2273373Y (en)

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