CN218672156U

CN218672156U - Liquid fuel low-nitrogen oxide sub-high-speed burner

Info

Publication number: CN218672156U
Application number: CN202222740227.2U
Authority: CN
Inventors: 刘光武
Original assignee: Tangshan Shunyi Environmental Protection Technology Co ltd
Current assignee: Tangshan Shunyi Environmental Protection Technology Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-03-21
Anticipated expiration: 2032-10-18

Abstract

The utility model discloses a liquid fuel low nitrogen oxide sub-high velocity burner, including the nozzle shell, the upper end intercommunication of nozzle shell has first tuber pipe and second tuber pipe, forms primary air chamber and overgrate air chamber between first tuber pipe and second tuber pipe and the nozzle shell, and the tip of nozzle shell is equipped with primary air swirler and overgrate air swirler, and the nozzle shell is connected with the burner block; the nozzle center is equipped with the oil gun subassembly, and the shower nozzle subassembly is installed to the one end of oil gun subassembly, and the other end is connected with bracket assembly. The utility model discloses a change the structure of the atomizer of liquid burners such as heavy oil, make heavy oil atomization quality change to make the heavy oil can reach good combustion effect in combustion-supporting wind intensive mixing, and burn the mode through adopting flame classification, staged burning, organize the fuel at the combustor oxygen deficiency burning, thereby the close check flame combustion temperature, thereby just reduce or reduce NOx production volume in the high temperature flue gas on the nozzle source.

Description

Liquid fuel low-nitrogen oxide sub-high-speed burner

Technical Field

The utility model relates to a nozzle field especially relates to a liquid fuel low nitrogen oxide subhigh velocity burner.

Background

The fuel liquid fuel is often used as industrial fuel in the industries of metallurgy, petrifaction, building materials, electric power, fire resistance, boilers, machinery and the like. The burning of liquid fuels presents two biggest problems, one is the atomization of the liquid fuel and one is the environmental pollution problem of NOx. These two problems are also associated, the poor atomization of the liquid fuel, the poor control of the combustion temperature, the high production of NOx, which is the main component of acid rain, causes serious pollution to the environment, it corrodes buildings, industrial equipment and historic sites, damages a plant leaf, causes destruction of forests, causes death of fish and shrimp in lakes, destroys groundwater, acidifies groundwater, and causes harm to human body. Accordingly, the present application provides a liquid fuel low NOx sub-high velocity burner for addressing the problems of atomization of liquid fuels and environmental pollution associated with NOx emissions.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a liquid fuel hangs down nitrous oxide nozzle, solves liquid fuel's atomizing and the problem of the big environmental pollution of NOx emission.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a liquid fuel low nitrogen oxide sub-high velocity burner, including the nozzle shell, the upper end intercommunication of nozzle shell has first tuber pipe and second tuber pipe, first tuber pipe and second tuber pipe with form primary air chamber and overgrate air chamber between the nozzle shell, the tip of nozzle shell is equipped with primary air swirler and overgrate air swirler, the nozzle shell is connected with the burner block; the nozzle center is equipped with the oil gun subassembly, the shower nozzle subassembly is installed to the one end of oil gun subassembly, and the other end is connected with bracket assembly.

Furthermore, the second air pipe is provided with an adjusting valve.

Further, the oil gun assembly includes an outer tube, an oil gun tube disposed inside the outer tube, and an atomizer tube disposed inside the oil gun tube.

Furthermore, the spray head assembly comprises an oil gun head, a mixing pipe head and a mixing spray head, the oil gun head is connected to the end of the oil gun pipe, the mixing spray head is connected to the oil gun head, one end of the mixing pipe head is connected with the atomizer pipe, and the other end of the mixing pipe head is arranged in the mixing spray head.

Further, the bracket component includes the oil gun bracket, oil gun pipe and atomizer pipe are arranged in the inside of oil gun bracket, and respectively with the liquid oil import and the atomizing agent import of seting up on the oil gun bracket are linked together, the top threaded connection of oil gun bracket has the jackscrew screw rod, install the fixed handle of oil gun on the jackscrew rod.

Compared with the prior art, the utility model discloses a beneficial technological effect:

the utility model discloses a change the structure of the atomizer of liquid burners such as heavy oil, make heavy oil atomization quality change to make the heavy oil can reach good combustion effect in combustion-supporting wind intensive mixing, and burn the mode through adopting flame classification, staged burning, organize the fuel at the combustor oxygen deficiency burning, thereby the close check flame combustion temperature, thereby just reduce or reduce NOx production volume in the high temperature flue gas on the nozzle source.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

FIG. 1 is a cross-sectional view of a liquid fuel low NOx sub-high velocity fuel burner of the present invention;

FIG. 2 is a schematic view of the oil gun assembly;

FIG. 3 is a side view of the bracket assembly;

FIG. 4 is a cross-sectional view of the bracket assembly;

description of reference numerals: 1. a burner housing; 2. a first air duct; 3. a second air duct; 4. a primary air chamber; 5. a secondary air chamber; 6. a primary air swirler; 7. a secondary air cyclone; 8. a burner block; 9. an oil gun assembly; 91. an outer tube; 92. an oil gun tube; 93. an atomizer tube; 10. a showerhead assembly; 101. a grease gun head; 102. a mixing tube head; 103. a mixing nozzle; 11. a bracket assembly; 111. an oil gun bracket; 112. a liquid oil inlet; 113. an atomizing agent inlet; 114. a jackscrew; 115. a handle is fixed on the oil gun; 12. and adjusting the valve.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-4, the liquid fuel low-nitrogen oxide sub-high-velocity burner comprises a burner shell 1, wherein the upper end of the burner shell 1 is communicated with a first air pipe 2 and a second air pipe 3, and the second air pipe 3 is provided with an adjusting valve 12.

First tuber pipe 2 and second tuber pipe 3 with form primary air chamber 4 and overgrate air chamber 5 between the nozzle casing 1, the tip of nozzle casing 1 is equipped with primary air swirler 6 and overgrate air swirler 7, nozzle casing 1 is connected with burner block 8.

The primary air cyclone 6 and the secondary air cyclone 7 are made of the following materials: the silicon carbide mullite castable (wherein SIC is more than 85 percent, the refractoriness is more than 1870 ℃, and the refractoriness under load is more than 1610 ℃).

The primary air cyclone 6 is a solid angle, the axial angle is 0-40 degrees, the radial angle is 10-34 degrees, the injection speed of the primary air solid angle is 50-70NM/S, and the number of the injection angles depends on the capability of the burner.

The secondary air swirler 7 is used to perform oxyfuel combustion around the oxygen-deficient combustion products from the "rich zone", which is the burnout zone of the fuel. The fuel forms a "volumetric burn" in this region. The secondary air swirler 7 is a solid angle and is intersected with the air flow from the rich combustion zone in a 360-degree direction in a three-dimensional mode, the axial angle is 0-40 degrees, the radial angle is 10-34 degrees, the injection speed of the secondary air solid angle is 30-50NM/S, and the number of injection angles is determined according to the capability of a burner.

The burner block 8 is a heavy low cement castable precast block which needs to be baked and sintered, and the Ai2O3 content is more than 65 percent.

An oil gun assembly 9 is arranged in the center of the burner, the oil gun assembly 9 comprises an outer pipe 91, an oil gun pipe 92 and an atomizer pipe 93, the oil gun pipe 92 is arranged inside the outer pipe 91, and the atomizer pipe 93 is arranged inside the oil gun pipe 92.

A spray head assembly 10 is installed at one end of the oil gun assembly 9, the spray head assembly 10 comprises an oil gun head 101, a mixing pipe head 102 and a mixing spray head 103, the oil gun head 101 is connected to the end portion of the oil gun pipe 92, the mixing spray head 103 is connected to the oil gun head 101, one end of the mixing pipe head 102 is connected with the atomizer pipe 93, and the other end of the mixing pipe head 102 is arranged in the mixing spray head 103. The material of the mixing nozzle 103 is: cr24Ni7N, and the included angle between the outlet of the mixing nozzle 103 and the axial direction is 50 degrees. The mixing tube head 102 is 3-6 heads of surface lathing, the lead of the spiral guide groove is 10-18, the groove depth is 1.0-3.5, and the groove width is 01-3.9. The mixing tip 102 is a double swirl structure.

The other end of oil gun subassembly 9 is connected with bracket assembly 11, bracket assembly 11 includes oil gun bracket 111, oil gun pipe 92 and atomizer pipe 93 are arranged in oil gun bracket 111's inside, and respectively with liquid oil import 112 and the atomizing agent import 113 of seting up on oil gun bracket 111 are linked together, oil gun bracket 111's top threaded connection has jackscrew 114, install oil gun fixed handle 115 on the jackscrew 114. The oil gun or the burner of the domestic common fuel burner can be overhauled only by disassembling the whole burner, and the maintenance cost is 2-3 hours, the oil gun is overhauled by the structure, the oil gun can be easily pulled out only by loosening the oil gun fixing handle 115 on the oil gun bracket 111, and the maintenance cost is 2-3 minutes.

From the theory and practice of combustion, it is found that the amount of NOx generated by the combustion of fuel is related to the combustion temperature of the fuel during the combustion process, when the temperature of the combustion flame is higher than 1350 ℃, the N2 gas in the air is combined with the O2 gas at high temperature, so that NOx is rapidly generated, and when the temperature of smoke is lower than 1350 ℃, the generation of NOx is very low.

In the combustion process of heavy oil, combustion-supporting air is supplied by primary air and secondary air before entering a burner, and the fuel can be combusted in stages and stages in the combustion process by controlling the proportion of the primary air of the combustion-supporting air. When primary air is supplied, fuel is enabled to form a fuel-rich combustion area in an ignition area near a burner nozzle, namely the air excess coefficient alpha is less than 1.0, the combustion products are in a reducing atmosphere, then secondary air is fed into the ignited burner, and a burner presents a burnout area, namely a secondary combustion area with alpha being more than 1.0 is formed.

In the initial stage of combustion and ignition, only about 60-75% of primary combustion-supporting air is added, and in this stage, the fuel can not be completely combusted in the fuel-rich zone due to oxygen deficiency, so that the flame temperature can not be increased, and the flame temperature is lower than 1350 deg.C, so that it is not easy to produce NOx. When the secondary combustion-supporting air (about 20-40%) is fed into the downstream of primary combustion zone, i.e. secondary combustion zone whose alpha is greater than 1.0 is formed, in the second stage zone (i.e. burn-out zone) the fuel can be completely combusted.

The combustion process of controlling the nitrogen oxides of the burner is as follows:

the combustion is divided into two stages, in the first stage 'rich combustion' area, 70% -80% of combustion-supporting air vertically forms a 'swirl fire net' from the periphery of a fuel gas jet orifice (the fuel and the primary air are in a three-dimensional swirl state). The atomized liquid fuel has atomized particles of only 0.001-0.002mm, and when the atomized liquid fuel meets 70-80% of primary combustion-supporting air sprayed in a swirling manner from the periphery (the fuel and the air are mutually sprayed at a three-dimensional intersection angle), the fuel is fully stirred and mixed under the condition of oxygen deficiency. Due to oxygen starvation, the "fuel rich zone" flame temperature does not reach the theoretical combustion temperature. When the combustion products are jetted forward from the burner channel, the combustion products meet secondary air jetted from the solid angle rotational flow, at the same time, when the unburned fuel meets certain secondary air, the combustion products can be jetted forward and combusted at the same time, the flame at the same time forms a flame with a near-sighted volume combustion, and at the same time, the NOx matters of the jetted high-temperature flue gas for heating the blank in the furnace are greatly reduced. The content of NOx in the high-temperature flue gas can meet the requirement of environmental protection.

The novel environment-friendly low NOx combustion device for controlling the NOx content from the gas combustion source adopts a unique structure in a burner structure, and a primary air flow ratio adjusting valve (the primary air flow ratio can be adjusted from feedback data of the NOx content in flue gas, and can automatically form an adjusting closed loop) is arranged in front of a burner, so that staged and staged combustion is formed in the fuel combustion process, namely, the staged combustion is divided into a fuel-rich area and a burn-out area. The high temperature area with excessive concentration is avoided in the process of burning the fuel in the burner. A "volume burning" flame is formed. Therefore, the emission of NOx in the smoke can be greatly reduced, (the NOx can be reduced by about 30-50%). It brings considerable environmental protection benefits to enterprises and society, so the burner is an environmental protection and energy saving type combustion device.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The liquid fuel low-nitrogen oxide sub-high-speed burner is characterized in that: the burner comprises a burner shell (1), wherein the upper end of the burner shell (1) is communicated with a first air pipe (2) and a second air pipe (3), a primary air cavity (4) and a secondary air cavity (5) are formed between the first air pipe (2) and the burner shell (1) and between the second air pipe (3) and the burner shell (1), a primary air swirler (6) and a secondary air swirler (7) are arranged at the end part of the burner shell (1), and the burner shell (1) is connected with a burner brick (8); the nozzle center is equipped with oil gun subassembly (9), shower nozzle subassembly (10) are installed to the one end of oil gun subassembly (9), and the other end is connected with bracket assembly (11).

2. The liquid fuel low-nox sub-high velocity burner of claim 1, wherein: and the second air pipe (3) is provided with a regulating valve (12).

3. The liquid fuel low-nox sub-high velocity burner of claim 1, wherein: the oil gun assembly (9) comprises an outer tube (91), an oil gun tube (92) and an atomizer tube (93), wherein the oil gun tube (92) is arranged inside the outer tube (91), and the atomizer tube (93) is arranged inside the oil gun tube (92).

4. The liquid fuel low-nox sub-high velocity burner of claim 3, wherein: the spray head assembly (10) comprises an oil gun head (101), a mixing pipe head (102) and a mixing spray head (103), the oil gun head (101) is connected to the end portion of the oil gun pipe (92), the mixing spray head (103) is connected to the oil gun head (101), one end of the mixing pipe head (102) is connected with the atomizer pipe (93), and the other end of the mixing pipe head is arranged in the mixing spray head (103).

5. The liquid fuel low-nox sub-high velocity burner of claim 4, wherein: bracket assembly (11) are including oil gun bracket (111), oil gun pipe (92) and atomizer pipe (93) are arranged in the inside of oil gun bracket (111), and respectively with liquid oil import (112) and atomizing agent import (113) of seting up on oil gun bracket (111) are linked together, the top threaded connection of oil gun bracket (111) has jackscrew rod (114), install oil gun fixed handle (115) on jackscrew rod (114).