WO2019119493A1

WO2019119493A1 - Auxiliary combustion apparatus in combination with secondary air duct

Info

Publication number: WO2019119493A1
Application number: PCT/CN2017/119194
Authority: WO
Inventors: 许保平
Original assignee: 国丰新能源江苏有限公司
Priority date: 2017-12-20
Filing date: 2017-12-28
Publication date: 2019-06-27
Also published as: CN107940498A

Abstract

An auxiliary combustion apparatus in combination with a secondary air duct (1), comprising a secondary air duct (1), an auxiliary fuel gun (2), a fixing rack, and an air duct extension tube (4). The air outlet of the secondary air duct (1) directly faces a hearth (5); the auxiliary fuel gun (2) is fixedly connected to the air outlet by means of a support; the air duct extension tube (4) is sleeved on the outside of the auxiliary fuel gun (2), and is connected to the secondary air duct (1) by means of a flange. The auxiliary fuel gun (2) is mounted in the air duct and thus can be cooled effectively, so that the auxiliary fuel gun can work normally and the service life thereof is prolonged.

Description

Auxiliary combustion device combined with secondary air duct

Technical field

The invention relates to the field of boiler ignition, in particular to an auxiliary combustion device combined with a secondary air duct.

Background technique

In order to meet the environmental protection requirements, it is necessary to ensure that when the boiler furnace temperature is not lower than 850 °C, when the boiler furnace temperature is lower than 850 °C, the operation instruction sent by the DCS of the centralized control room is automatically controlled by the PLC inside the control cabinet, and the corresponding action is adopted. Burning light diesel oil to raise the temperature and meet the national environmental protection requirements. Under normal circumstances, in order to meet the requirements of "flue gas temperature ≥ 850 ° C" and residence time ≥ 2S, it is necessary to increase the boiler auxiliary combustion system, and in order to ensure the normal operation of the auxiliary combustion system, it is necessary to add a water wall to allow the pipe, which will undoubtedly increase Engineering quantity.

Summary of the invention

In order to solve the above technical problems, the present invention provides an auxiliary combustion device combined with a secondary air duct.

The technical solution of the present invention is: an auxiliary combustion device combined with a secondary air duct, comprising a secondary air duct, a fuel auxiliary oil gun, a fixed frame and a duct extension tube; the air outlet of the secondary air duct is directly opposite The furnace is arranged, and a fuel-assisted oil gun is fixedly connected to the air outlet through a bracket, and the outer portion of the fuel-assisted oil gun is provided with a duct extension tube, and the duct extension tube is connected to the secondary air duct through a flange.

The air duct extension tube is provided with a connecting member, and the bracket and the connecting member are fixed by bolts, so that the fuel auxiliary oil gun is stably disposed in the air duct extension tube.

The bracket comprises a connecting plate and a connecting rod, and at least three connecting plates are arranged along the length direction thereof in the extended section of the air duct, the plate body is vertically arranged and the center is located on the same horizontal line; the horizontal connecting rod is passed between the board and the board Fixed, wherein the plate at one end is fixed to the secondary air duct.

An annular mounting plate is welded in the secondary air duct, and the bracket is connected to the mounting plate by bolts.

The annular mounting plate and the connecting plate are provided with ventilation holes.

The fuel-assisted oil gun includes an ignition oil gun and a booster. The booster is fixedly coupled to the bracket, and the ignition oil gun is slidably coupled to the bracket, and the booster can drive the ignition gun to translate.

The main body of the booster is fixed to the bracket, and the end of the movable rod is fixed to a movable plate, and the movable plate is fixedly connected with the ignition oil gun, and is slidably coupled with the connecting rod of the bracket.

A pipe hole is opened in the air duct extension pipe, and the oil pipe, the air pipe, the hydraulic pipe and the control line of the fuel auxiliary oil gun can be connected out from the pipeline hole and connected with related equipment.

The utility model has the beneficial effects that the fuel-assisted oil gun is installed in the air duct, can be effectively cooled, enables it to work normally, and prolongs its service life; and does not need to additionally provide a water-cooling wall to allow the tube, thereby saving engineering quantity. It provides a new way to add auxiliary combustion systems to boilers.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

In the figure, 1. secondary air duct, 2. fuel auxiliary oil gun, 2-1. ignition oil gun, 2-2. booster, 3. bracket, 3-1. connecting plate, 3-2. connecting rod , 4. duct extension tube, 5. furnace, 6. annular mounting plate, 7. movable plate, 8. pipe hole.

Detailed ways

As shown in FIG. 1, an auxiliary combustion device combined with a secondary air duct includes a secondary air duct 1, a fuel auxiliary oil gun 2, a fixed frame 3 and a duct extension tube 4; the secondary air duct 1 The air outlet is disposed on the furnace 5, and the fuel auxiliary oil gun 2 is fixedly connected to the air outlet through the bracket 3, and the outer portion of the fuel auxiliary oil gun 2 is provided with a duct extension tube 4, and the air duct extension tube 4 passes The flange is connected to the secondary air duct 1.

The air duct extension tube 4 is provided with a connecting member, and the bracket 3 and the connecting member are fixed by bolts, so that the fuel auxiliary oil gun 2 is stably disposed in the air duct extension tube 4.

The bracket 3 comprises a connecting plate 3-1 and a connecting rod 3-2. In the duct extension 4, at least three connecting plates 3-1 are arranged along the length thereof, and the plates are vertically arranged and the center is at the same horizontal line. The plate is fixed to the plate by a transverse connecting rod 3-2, and the plate at one end is fixedly connected to the secondary air duct 1.

An annular mounting plate 6 is welded to the secondary air duct 1 and the bracket 3 is connected to the mounting plate by bolts.

The annular mounting plate 6 and the connecting plate 3-1 are uniformly provided with ventilation holes.

The fuel-assisted oil gun 2 includes an ignition oil gun 2-1 and a booster 2-2. The booster 2-2 is fixedly connected to the bracket 3, and the ignition oil gun 2-1 is slidably coupled with the bracket 3. The booster 2-2 can drive the ignition oil gun 2-1 to translate.

The main body of the booster 2-2 is fixedly connected to the bracket 3, and the end of the movable rod is fixed to a movable plate 7, and the movable plate 7 is fixedly connected with the ignition oil gun 2-1, and the connecting rod of the bracket 3 3-2 slip fit connection.

A pipe hole 8 is defined in the duct extension pipe 4, and the oil pipe, the air pipe, the hydraulic pipe and the control line of the fuel auxiliary oil gun 2 can be connected from the pipe hole 8 to be connected with related equipment.

Claims

An auxiliary combustion device combined with a secondary air duct, comprising: a secondary air duct, a fuel auxiliary oil gun, a fixed frame and a duct extension tube; the air outlet of the secondary air duct is disposed on the furnace A fuel-assisted oil gun is fixedly connected to the air outlet through a bracket, and the outer portion of the fuel-assisted oil gun is provided with a duct extension tube, and the duct extension tube is connected to the secondary air duct through a flange.
The auxiliary combustion device combined with the secondary air duct according to claim 1, wherein the air duct extension tube is provided with a connecting member, and the bracket and the connecting member are fixed by bolts.
The auxiliary combustion device combined with the secondary air duct according to claim 1, wherein the bracket comprises a connecting plate and a connecting rod, and at least three pieces are arranged along the length thereof in the extended portion of the air duct. The connecting plate is vertically arranged and the center is located on the same horizontal line; the plate is fixed by a transverse connecting rod, and the plate at one end is fixedly connected with the secondary air duct.
The auxiliary combustion device combined with the secondary air duct according to claim 3, wherein the connecting plate is provided with a ventilation hole.
The auxiliary combustion device combined with the secondary air duct according to claim 1, wherein the secondary air duct is welded with an annular mounting plate, and the bracket is connected to the mounting plate by bolts.
The auxiliary combustion device combined with the secondary air duct according to claim 5, wherein the annular mounting plate is uniformly provided with a vent hole.
The auxiliary combustion device combined with the secondary air duct according to claim 1, wherein the fuel-assisted oil gun comprises an ignition oil gun and a booster, and the booster is fixedly connected with the bracket. The ignition oil gun is slidably coupled to the bracket, and the booster can drive the ignition gun to translate.
The auxiliary combustion device combined with the secondary air duct according to claim 1, wherein the main body of the booster is fixed to the bracket, and the end of the movable rod is fixed to a movable plate, The movable plate is fixedly connected with the ignition oil gun, and is slidably coupled with the connecting rod of the bracket.
The auxiliary combustion device combined with the secondary air duct according to claim 1, wherein the air duct extension pipe is provided with a pipeline hole, a fuel auxiliary oil gun oil pipe, a air pipe, a hydraulic pipe, The control line can be routed through the pipe hole and connected to the relevant equipment.