CN201306716Y - Coke-oven gas ignition burner - Google Patents

Abstract

The utility model discloses an ignition burner for coke oven gas, which comprises: a gas pipe, a burner, an outer pipe of the burner, a combustion stabilizing cylinder, a primary air flow regulating cylinder and an electronic igniter. Fire spout; the burner is conical, which is welded on the head of the gas pipe; the outer tube of the burner is sleeved on the gas tube, and the outer tube of the burner is provided with a plurality of air vents flow holes; the combustion stabilization tube is provided with a plurality of uniformly distributed secondary air flow holes, which are fixed on the outer tube of the burner by bolts; the primary air flow adjustment tube is sleeved on the outer tube of the burner It is provided with an adjustment handle and a plurality of primary air adjustment holes corresponding to the air passage holes on the outer tube of the burner; the ignition electrode of the electronic igniter is located above the ignition nozzle of the gas tube. The utility model can make full use of various gas in the smelting production process of the iron and steel plant, and reduces the emission to the atmosphere.

Description

Coke oven gas ignition burner

technical field

The utility model relates to a coke oven gas ignition burner in an industrial combustion boiler, in particular to a coke oven gas ignition burner capable of stably burning low calorific value gas.

Background technique

At present, coke oven gas, blast furnace gas and converter gas are produced in the production process of coke oven coking, blast furnace ironmaking and converter steelmaking in various iron and steel metallurgical enterprises. The process produces an increasing amount of gas. Due to the different combustion calorific values of various gases, their combustion characteristics are quite different. Coke oven gas has a high calorific value and can burn independently and stably. Due to the influence of smelting technology and production process conditions, converter and blast furnace gas has low calorific value and fluctuates and is unstable. Low calorific value gas cannot be directly ignited and independently and stably burned. High calorific value gas must be used for ignition and mixing. The high calorific value gas can be burned stably, otherwise the low calorific value gas can only reduce the consumption or release it directly to the atmosphere due to the unstable combustion, resulting in energy waste and environmental pollution.

How to achieve the combustion stability of low-calorific-value gas, reduce the mixed combustion ratio of high-calorific-value gas, optimize the economy of boiler gas structure, increase the combustion amount of low-calorific-value gas, reduce the emission of low-calorific-value gas, and protect the atmospheric environment. One of the key issues to be solved in the combustion technology of industrial gas boilers.

At present, there are two main methods to improve the combustion stability of low calorific value gas: one is to use high calorific value natural gas or coke oven gas to ignite, and mix high calorific value gas and low calorific value gas to stabilize combustion; the other is to use low calorific value gas Preheat and pressurize to increase its stability. The former requires a large amount of natural gas or coke oven gas to ensure combustion stability, while the latter needs to increase low-calorific-value gas preheating and pressurization equipment, which requires a large investment cost and increases the consumption of electric energy, resulting in production and operation costs. There are certain difficulties in promoting the use of industrial combustion boilers in iron and steel enterprises.

Contents of the invention

In order to solve the above problems, the utility model provides a coke oven gas ignition burner to achieve the purpose of reducing the proportion of high calorific value gas and improving the stability of boiler combustion.

In order to achieve the above object, the coke oven gas ignition burner of the present utility model includes: a gas pipe 10, a burner 20, a burner outer pipe 30, a stable combustion cylinder 40, a primary air flow regulating cylinder 50 and an electronic igniter 60. The front end of the gas pipe 10 is provided with an ignition nozzle 11; the burner 20 is conical and welded on the head of the gas pipe 10, and the burner 20 is provided with a plurality of nozzles 21; The pipe 30 is sleeved on the gas pipe 10, the outer pipe of the burner 30 is provided with a plurality of air flow holes 31, the front end of the pipe is provided with a fixing bracket 32, and the rear end of the outer pipe of the burner 30 is welded with The connecting flange 70, the gas pipe 10 is fixed on the fixed frame 32 and the connecting flange 70; the stable combustion cylinder 40 is provided with a plurality of uniformly distributed secondary air flow holes 41, and the stable combustion cylinder 40 is fixed on the burner outer tube 30 by bolts 42; the primary air flow regulating cylinder 50 is sleeved on the burner outer tube 30, and it is provided with an adjustment handle 52 and a plurality of The primary air conditioning hole 51 corresponding to the upper air flow hole 31 on the 30; the electronic igniter 60 is located in the burner outer tube 30, and it is fixed on the fixed frame 32 and the connecting flange 70, and its ignition electrode 61 is located above the ignition nozzle 11 of the gas pipe 10 .

The nozzles 21 on the burner 20 are evenly arranged on two concentric circles, and the axis of each nozzle has the same rotation angle with the normal line of the cone where the nozzle is located.

A plurality of V-shaped cutouts 43 are formed on the outlet circumference of the combustion stabilization cylinder 40 .

The adjustment handle 52 can be positioned on the connecting flange 70 via bolts 53 .

The coke oven gas ignition burner of the utility model strengthens the mutual disturbance between gas and air, improves the mixing ability of gas and air, reduces the proportion of high calorific value gas added, and improves the stability of boiler combustion. The coke oven gas ignition burner of the utility model makes full use of various gases in the smelting production process of the iron and steel plant, reduces the consumption of high calorific value gas, increases the consumption of low calorific value gas, optimizes the economy of the boiler gas structure, and at the same time The emission to the atmosphere is reduced, which helps to better achieve the goal of energy saving and emission reduction.

Description of drawings

Fig. 1 is the structural representation of coke oven gas ignition burner of the present utility model;

Fig. 2 is the left side view of the burner in Fig. 1;

Fig. 3 is an A-A sectional view of the coke oven gas ignition burner in Fig. 1;

Fig. 4 is a B-B sectional view of the coke oven gas ignition burner in Fig. 1;

Fig. 5 is an enlarged schematic left view of the burner in Fig. 1 .

Detailed ways

Fig. 1 is the structural representation of the coke oven gas ignition burner of the present utility model, and Fig. 2 is the left side view of the stable burner in Fig. 1, and Fig. 3 is the A-A sectional view of the coke oven gas ignition burner in Fig. 1, and Fig. 4 is B-B sectional view of the coke oven gas ignition burner in Fig. 1 . As shown in Figures 1 to 4, the coke oven gas ignition burner of the present utility model includes: a gas pipe 10, a burner 20, a burner outer pipe 30, a stable combustion cylinder 40, a primary air flow regulating cylinder 50 and an electronic igniter 60 .

The front end of the gas pipe 10 is provided with an ignition nozzle 11 . The gas pipe 10 is used for inputting coke oven gas.

The burner 20 is conical, and it is welded on the head of the gas pipe 10 . The burner 20 is provided with a plurality of nozzles 21 .

The burner outer pipe 30 is sleeved on the gas pipe 10, the burner outer pipe 30 is provided with a plurality of air flow holes 31, the front end of the pipe is provided with a fixing frame 32, and the rear of the burner outer pipe 30 A connection flange 70 is welded at the end, and the gas pipe 10 is fixed on the fixing frame 32 and the connection flange 70 . The connecting flange 70 fixes the coke oven gas ignition burner of the present invention on the furnace wall support (not shown in the figure) of the boiler.

The combustion stabilization cylinder 40 is fixed on the burner outer tube 30 by bolts 42 , and is provided with a plurality of evenly distributed secondary air equalizing holes 41 . The combustion stabilizing tube 40 has the effect of enclosing high-temperature flue gas, maintaining a relatively high temperature in this area, and enhancing the stability of low calorific value gas combustion. There are a plurality of V-shaped notches 43 on the outlet circumference of the stable combustion cylinder 40, in order to avoid being scoured and burned by high-temperature flames and thermal expansion deformation.

The primary air flow adjustment cylinder 50 is sleeved on the burner outer tube 30, and it is provided with an adjustment handle 52 and a plurality of primary air adjustment holes 51 corresponding to the air flow holes 31 on the burner outer tube 30. The adjusting handle 52 can be positioned on the connecting flange 70 through the bolt 53 . By turning the adjusting handle 52 , the flow area of the primary air adjustment hole 51 and the air flow hole 31 on the outer tube 30 of the burner can be adjusted, thereby adjusting the flow rate of the primary air.

The electronic igniter 60 is located in the burner outer tube 30 , it is fixed on the fixing frame 32 and the connecting flange 70 , and its ignition electrode 61 is located above the ignition nozzle 11 of the gas pipe 10 .

When the coke oven gas ignition burner of the utility model is in use, the air entering from the outside enters in two parts, and one part enters the outer tube 30 of the burner through the primary air adjustment hole 51 and the air flow hole 31 on the outer tube 30 of the burner. Inside, it is used for burning at the ignition nozzle 11; the other part enters the stable combustion tube 40 through the secondary air equalizing hole 41, and is used for burning the gas of the burner 20.

The coke oven gas enters from the gas pipe 10, part of it is ejected through the ignition nozzle 11, and is ignited by the spark generated by the ignition electrode 61 of the electronic igniter 60; The start-up and ignition time of the electronic igniter 60 are automatically controlled by an external electrical device.

Fig. 5 is an enlarged schematic left view of the burner in Fig. 1 . As shown in the figure, the multiple spouts 21 on the burner 20 are evenly arranged on two concentric circles, the diameters of the spouts 21 of the inner ring and the outer ring can be different, and the axis of each spout is conical with the position of the spout. Lines have the same rotation angle. In this way, the coke oven gas ejected from the burner 20 forms a swirling airflow, that is, in a swirl shape, intersects with the straight air and low calorific value gas, has the effect of entraining surrounding air and other low calorific value gas, and strengthens the flow of various gases. The uniformity of mixing shortens the combustion time of fuel, the combustion flame is short, and the stability is strong; because the gas is ejected from the burner 20 in the form of a rotating jet, the airflow velocity at the nozzle 21 increases and the pressure difference rises, ensuring the pressure at the nozzle 21 of the burner Under the premise that the required high calorific value gas flow rate can be reduced.

Claims (4)

1. A coke oven gas ignition burner is characterized in that it comprises: gas pipe (10), burner (20), burner outer tube (30), stable combustion tube (40), primary air flow regulating tube ( 50) and electronic igniter (60), The front end of the gas pipe (10) is provided with an ignition nozzle (11); The burner (20) is conical, and it is welded on the head of the gas pipe (10), and the burner (20) is provided with a plurality of nozzles (21); The outer tube of the burner (30) is sleeved on the gas pipe (10), the outer tube of the burner (30) is provided with a plurality of air flow holes (31), and the front end of the tube is provided with a fixing frame ( 32), the rear end of the burner outer tube (30) is welded with a connecting flange (70), and the gas pipe (10) is fixed on the fixing frame (32) and the connecting flange (70); The combustion stabilization cylinder (40) is provided with a plurality of uniformly distributed secondary air flow holes (41), and the combustion stabilization cylinder (40) is fixed on the burner outer tube (30) by bolts (42) ; The primary air flow regulating cylinder (50) is sleeved on the burner outer tube (30), and it is provided with an adjusting handle (52) and a plurality of air passage holes ( 31) corresponding primary air conditioning hole (51); The electronic igniter (60) is located in the outer tube (30) of the burner, it is fixed on the fixing frame (32) and the connecting flange (70), and its ignition electrode (61) is located in the gas tube (10) above the ignition nozzle (11). 2. The coke oven gas ignition burner according to claim 1, characterized in that, the plurality of nozzles (21) on the burner (20) are evenly arranged on two concentric circles, and the axis of each nozzle is in line with the The cone normal where the spout is located has the same rotation angle. 3. The coke oven gas ignition burner according to claim 1, characterized in that a plurality of V-shaped notches (43) are formed on the outlet circumference of the combustion stabilization cylinder (40). 4. The coke oven gas ignition burner according to claim 1, characterized in that the adjustment handle (52) can be positioned on the connecting flange (70) through bolts (53).

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