CN212408628U - Combustor system suitable for degree of depth peak regulation - Google Patents
Combustor system suitable for degree of depth peak regulation Download PDFInfo
- Publication number
- CN212408628U CN212408628U CN202021631161.8U CN202021631161U CN212408628U CN 212408628 U CN212408628 U CN 212408628U CN 202021631161 U CN202021631161 U CN 202021631161U CN 212408628 U CN212408628 U CN 212408628U
- Authority
- CN
- China
- Prior art keywords
- burner
- coal
- dual
- burnout
- pulverized coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A burner system suitable for deep peak regulation comprises a coal-fired and burnout dual-purpose burner, wherein the coal-fired and burnout dual-purpose burner is positioned right below a burnout air burner; the coal-fired and burnout dual-purpose burner is positioned right above the pulverized coal burner, the air box of the combustion system comprises a pulverized coal burner air box and a coal-fired and burnout dual-purpose burner air box, the pulverized coal burner air box is connected with the pulverized coal burner, and the coal-fired and burnout dual-purpose burner air box is connected with the coal-fired and burnout dual-purpose burner and the burnout air burner. A coal-fired and burnout dual-purpose burner is arranged in a hearth burnout air area, and the coal-fired and burnout dual-purpose burner can flexibly act as a coal powder burner and a burnout air burner according to different unit loads by opening or closing a coal powder pipeline of the dual-purpose burner, so that NOx generated by combustion under low-load main reheat steam temperature and high load in the unit can meet the requirement of a design value.
Description
Technical Field
The utility model belongs to power plant boiler combustion system field, concretely relates to combustor system suitable for degree of depth peak shaver.
Background
With the rapid increase of new energy generating sets such as wind power and photovoltaic power in recent years, some areas have serious problems of wind abandonment, light abandonment and the like, and although the overall wind abandonment rate is reduced after the optimization and adjustment of a power system, the overall wind abandonment rate is still higher. Based on the method, electric power auxiliary service market operation rules are issued in various places, the thermal power generating unit is guided to improve operation flexibility through reward and punishment means, and the outstanding problems of peak regulation, heat supply, renewable energy consumption and the like in electric power operation are solved.
The deep peak regulation operation of the thermal power generating unit is mainly characterized in that: (1) the utilization hours of the unit are reduced, the large-capacity unit is often operated under low load, the main steam temperature and the reheat steam temperature of the boiler are lower than the designed values due to low load rate, and the operation economy of the unit is influenced. For example, when a 300MW unit is under 110MW load (36.7% load rate), the temperature of main reheat steam and the temperature of reheat steam are respectively 524 ℃ and 518 ℃, the temperature of the main reheat steam is respectively 16 ℃ and 22 ℃ lower than the design value, and the coal consumption for generating electricity is respectively 1.44 g/(kW.h) and 1.32 g/(kW.h) higher; under the working condition that the load of a certain 300MW unit is lower than 210MW, the temperature of reheated steam is 525-530 ℃, and the difference between the reheated steam temperature and the designed value is about 10-15 ℃. The coal consumption for power generation is increased by about 0.75 g/(kW.h) to 1.13 g/(kWh). (2) AGC commands fluctuate frequently, AGC variable load rate is high, so that the tracking of the main steam pressure of the unit is not timely, the condition that the main steam pressure is not matched with the main steam temperature exists, and the automatic tracking and adjusting performance of the steam temperature is poor.
A screen superheater, a high-temperature superheater and a high-temperature reheater of the boiler are respectively arranged at the outlet of a hearth, above a flame folding angle and in a horizontal flue, the heat transfer mode of a heating surface is radiation type, semi-convection type and convection type, and the regulation of the main steam temperature and the reheated steam temperature of a unit is related to the quantity of flue gas generated by combustion and the temperature of the flue gas. When the unit operates at low load, because the coal burning quantity and the total air quantity are relatively fixed, the flue gas quantity generated by combustion is relatively stable, so that the temperature of main and reheating steam is increased under low load, and the temperature of the flue gas at the outlet of a hearth is required to be increased. Aiming at the deep peak regulation and flexible operation adaptability of the coal-fired thermal power generating unit, the domestic scientific research institutions and manufacturers provide technical transformation routes of stable combustion of a combustor, a pulverized coal distributor, a wide-load denitration technology, zero output of a low-pressure cylinder, energy storage and the like, reduce the minimum output of the coal-fired thermal power generating unit and improve the deep peak regulation capability by implementing technical transformation. However, the economic aspects of the unit are less researched in the deep peak regulation operation mode, and although the steam temperature of the unit is improved at low load through operation adjustment modes such as the operation of throwing an upper coal mill, optimizing air distribution, reducing coal powder fineness and the like, the steam temperature raising capacity of the unit is limited.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a combustor system suitable for degree of depth peak shaver.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a burner system suitable for deep peak regulation comprises a combustion system air box, a coal and burnout dual-purpose burner, a pulverized coal burner and a burnout air burner; the coal-fired and burnout dual-purpose burner is positioned right below the burnout air burner; the coal-fired and burnout dual-purpose burner is positioned right above the pulverized coal burner, the air box of the combustion system comprises a pulverized coal burner air box and a coal-fired and burnout dual-purpose burner air box, the pulverized coal burner air box is connected with the pulverized coal burner, and the coal-fired and burnout dual-purpose burner air box is connected with the coal-fired and burnout dual-purpose burner and the burnout air burner; the coal-fired and burnout dual-purpose burner is connected with a coal powder pipeline of the dual-purpose burner.
The utility model is further improved in that a coal fire detection device is arranged on the dual-purpose burner for coal burning and burnout; the coal-fired and burnout dual-purpose burner is arranged above the pulverized coal burner by 5-8 m.
The utility model discloses a further improvement lies in, is provided with the buggy spout on coal-fired and the dual-purpose type combustor of burning off, and the buggy spout is connected with dual-purpose type combustor buggy pipeline, and dual-purpose type combustor buggy pipeline is connected with coal pulverizer export buggy pipeline, and coal pulverizer export buggy pipeline links to each other with the coal pulverizer.
The utility model discloses further improvement lies in, dual-purpose type combustor buggy pipeline external diameter is 1/5 ~ 1/4 of coal pulverizer export buggy pipeline, and dual-purpose type combustor buggy pipeline material is the Q235 steel.
The utility model discloses further improvement lies in, has arranged coal pulverizer side coal gate, adjustable shrinkage cavity, wave form compensator and combustor side coal gate in proper order on the dual-purpose type combustor buggy pipeline.
The utility model discloses a further improvement lies in, buggy spout entrance is provided with the entry elbow.
The utility model has the further improvement that when the pulverized coal burner is applied to a tangential firing boiler, the pulverized coal nozzle is arranged between the lowest SOFA burner nozzle and the next lower SOFA burner nozzle; a first pulverized coal concentrator is arranged in the pulverized coal nozzle; the first pulverized coal concentrator comprises a concentrator shell, a middle partition plate is arranged in the concentrator shell, and concentrating blades are arranged between the concentrator shell and the middle partition plate.
The utility model has the further improvement that the area of the pulverized coal nozzle is 1/5-1/4 of the nozzle of the pulverized coal burner; a swing executing mechanism is arranged in the pulverized coal nozzle.
The utility model has the further improvement that when the burner is applied to an opposed firing boiler, the coal-fired and burnout dual-purpose burner is also provided with a central air nozzle and a burnout air nozzle, the coal powder nozzle, the central air nozzle and the burnout air nozzle are concentric circles and respectively provided with the coal powder nozzle, the central air nozzle and the burnout air nozzle from inside to outside; a conical pulverized coal concentrator is arranged in the pulverized coal nozzle; the pulverized coal nozzle is made of heat-resistant steel, the outer diameter of the pulverized coal nozzle is 1/5-1/4 of the nozzle of the pulverized coal burner, and the tail end of the pulverized coal nozzle is provided with a tooth-shaped annular combustion stabilizing ring made of ceramic; the central air nozzle is internally provided with direct-current air, the over-fire air nozzle is provided with rotational-flow air, and a rotational-flow blade is arranged in an air channel corresponding to the over-fire air nozzle.
The utility model discloses further improvement lies in, coal-fired and burn out dual-purpose type combustor is equipped with central wind adjusting device and whirl blade adjusting device including the apron on the apron.
Compared with the prior art, the utility model discloses the beneficial effect who has: a coal-fired and burnout dual-purpose burner is arranged in a hearth burnout air area, and the coal-fired and burnout dual-purpose burner can flexibly act as a coal powder burner and a burnout air burner according to different unit loads by opening or closing a coal powder pipeline of the dual-purpose burner, so that NOx generated by combustion under low-load main reheat steam temperature and high load in the unit can meet the requirement of a design value. When the unit operates under medium and low load, the coal gate on the coal powder pipeline of the dual-purpose burner is opened, at the moment, the coal-fired and burnout dual-purpose burner serves as a small-sized coal powder burner, the coal-fired and burnout dual-purpose burner is arranged above the coal powder burner, coal powder is combusted under the organization of the coal-fired and burnout dual-purpose burner, the central height of the flame of a hearth is raised, the temperature of flue gas at the outlet of the hearth is raised, and the main steam temperature and the reheat steam temperature of the unit under medium and low load can meet the design value requirements; when the unit operates under high load, the main steam temperature and the reheat steam temperature can reach design values, at the moment, a coal gate on a coal powder pipeline of the dual-purpose burner is closed, the coal-fired and burnout dual-purpose burner serves as a burnout air burner, and NOx generated by combustion can be reduced through air staged combustion.
Furthermore, as the coal-fired and burnout dual-purpose burner is arranged above the pulverized coal burner by 5-8 m, a small amount of pulverized coal is burned under the organization of the coal-fired and burnout dual-purpose burner, the height of the flame center of a hearth is raised, and the main steam temperature and the reheated steam temperature of the unit under low and medium loads can meet the design value requirements.
Drawings
Fig. 1 is a schematic diagram of a burner system suitable for deep peak shaving according to the present invention;
FIG. 2 is a schematic view of the coal powder pipeline arrangement of the present invention;
FIG. 3 is a coal powder nozzle of the dual-purpose burner of the tangential firing boiler of the utility model;
FIG. 4 is a schematic front view and a schematic side view of a coal-fired and burnout dual-purpose burner and a SOFA burner of the tangential firing boiler according to the present invention; wherein (a) is a front view and (b) is a side view;
FIG. 5 is a schematic view of the tangential firing boiler burner system of the present invention;
FIG. 6 is a schematic structural view of the dual-purpose burner of the opposed combustion boiler of the present invention;
fig. 7 is a schematic view of the dual-purpose burner nozzle of the opposed combustion boiler of the present invention.
The device comprises a coal-fired and burnout dual-purpose burner 1, a pulverized coal burner 2, a burnout air burner 3, a pulverized coal burner air box 4, a pulverized coal burner air box 5, a dual-purpose burner pulverized coal pipeline 6, a coal mill outlet pulverized coal pipeline 7, a waveform compensator 8, an adjustable shrinkage cavity 9, a burner side coal gate 10, a coal mill side coal gate 11, a coal mill 12, a coal mill 13, a pulverized coal nozzle 14, a first pulverized coal concentrator 15, a concentrator shell 16, a concentrating blade 17, a middle partition plate 18, a swing actuator 18, a SOFA burner nozzle 19, an inlet elbow 20, a central air nozzle 21, a burnout air nozzle 22, a stable combustion ring 23, a swirl blade 24, a central air adjusting device 25, a swirl blade adjusting device 26 and a cone-type pulverized coal concentrator 27.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the burner system suitable for deep peak shaving of the present invention includes a combustion system air box, a coal and burnout dual-purpose burner, a pulverized coal burner and a burnout air burner; the coal-fired and burnout dual-purpose burner is positioned right below the burnout air burner and is arranged closely; the coal-fired and burnout dual-purpose burner is positioned right above the pulverized coal burner, and the vertical distance between the coal-fired and burnout dual-purpose burner and the pulverized coal burner is different with the different boiler capacities and is about 5 m-8 m. The combustion system air box comprises a pulverized coal burner air box and a coal-fired and burnout dual-purpose burner air box, the pulverized coal burner air box is connected with the pulverized coal burner and used for providing secondary air for the pulverized coal burner, and the coal-fired and burnout dual-purpose burner air box is connected with the coal-fired and burnout dual-purpose burner and the burnout air burner and used for supplying air for the coal-fired and burnout dual-purpose burner and the burnout air burner.
The dual-purpose burner for coal burning and burnout is also provided with a coal fire detection device and brings the dual-purpose burner for coal burning and burnout into a boiler hearth safety monitoring system.
Referring to fig. 1, the coal and burnout dual-purpose burner is provided with a pulverized coal nozzle. Referring to fig. 2, the pulverized coal nozzle is connected to a pulverized coal pipeline of a dual-purpose burner, the pulverized coal pipeline of the dual-purpose burner is led from a coal mill at the lowest layer, specifically, the pulverized coal pipeline of the dual-purpose burner is connected to a pulverized coal pipeline at the outlet of the coal mill at the lowest layer, the outer diameter of the pulverized coal pipeline of the dual-purpose burner is 1/5-1/4 of the pulverized coal pipeline at the outlet of the coal mill, the pulverized coal pipeline of the dual-purpose burner is made of Q235 steel, and the pulverized coal pipeline at the outlet of the coal mill is connected to the coal mill.
The coal powder pipeline of the dual-purpose burner is sequentially provided with a coal mill side coal gate, an adjustable shrinkage cavity, a waveform compensator and a burner side coal gate.
An inlet elbow 20 is arranged at the inlet of the pulverized coal nozzle, the inlet elbow is made of wear-resistant materials, and wear-resistant ceramics are lined in the inlet elbow.
When the burner is applied to a tangential firing boiler, a pulverized coal nozzle of a coal-fired and burnout dual-purpose burner is arranged between a nozzle of a lowest SOFA burner and a nozzle of a lower SOFA burner; a first pulverized coal concentrator 14 is arranged in the pulverized coal nozzle, and referring to fig. 3, the first pulverized coal concentrator is composed of a concentrator shell, concentrating blades and a middle partition plate. A middle clapboard is arranged in the shell of the concentrator, and a concentrating blade is arranged between the shell of the concentrator and the middle clapboard.
When the burner is applied to an opposed firing boiler, referring to fig. 6, a central air nozzle and an over-fire air nozzle are also arranged on the coal-fired and over-fire dual-purpose burner, and the pulverized coal nozzle, the central air nozzle and the over-fire air nozzle are of concentric circle structures and are respectively the pulverized coal nozzle, the central air nozzle and the over-fire air nozzle from inside to outside. The pulverized coal nozzle, the central air nozzle and the over-fire air nozzle are made of heat-resistant steel. A conical pulverized coal concentrator is arranged in the pulverized coal nozzle. The area of a pulverized coal nozzle of the tangential firing boiler coal and burnout dual-purpose burner is 1/5-1/4 of the nozzle of the pulverized coal burner. Referring to (a) and (b) in fig. 4 and fig. 5, a swing actuator is arranged in the pulverized coal nozzle and can swing up and down and left and right along with the nozzle of the SOFA burner. The individual SOFA burner ports correspond to separate damper adjustment devices, which may be pneumatic or electric.
The pulverized coal burner is applied to an opposed firing boiler, and the outer diameter of a pulverized coal nozzle of a coal-fired and burnout dual-purpose burner is 1/5-1/4 of the nozzle of the pulverized coal burner. Referring to fig. 6 and 7, a tooth-shaped annular combustion stabilizing ring made of ceramic is arranged at the tail end of the pulverized coal nozzle; the central air nozzle and the over-fire air nozzle are taken from a wind box of the coal-fired and over-fire dual-purpose burner, direct-current air is arranged in the central air nozzle, and rotational-flow air is arranged in the over-fire air nozzle. And swirl vanes are arranged in the air channel corresponding to the over-fire air nozzle. Be applied to offset combustion boiler, coal-fired and burn up dual-purpose type combustor 1 is equipped with central wind adjusting device, whirl blade adjusting device including the apron on the apron, wherein, central wind adjusting device is used for adjusting the amount of wind that carries out the coal-fired and burn up dual-purpose type combustor central wind spout of offset combustion boiler, and whirl blade adjusting device is used for adjusting the amount of wind and the whirl intensity that carry out the coal-fired and burn up dual-purpose type combustor and burn up the wind of offset combustion boiler.
The traditional low-nitrogen combustion mode mainly adopts an air staged combustion mode, namely about 80 percent of air is sent into a hearth through a main combustion area, the excess air coefficient of the main combustion area is less than 1, and the main combustion area is in oxygen-deficient combustion, so that the flame temperature of the main combustion area is controlled, and the generation amount of thermal NOx and fuel NOx is inhibited; about 20% of air is fed into a hearth through a burnout area which is positioned 5 m-9 m above a main combustion area, the excess air coefficient of the burnout air area is more than 1, the burnout air area is oxygen-enriched combustion, and because the air supply temperature of the burnout area is about 300 ℃, the air temperature is lower than the temperature of flue gas in the hearth, the flame temperature can be reduced, and excessive NO can not be generatedx. In a traditional boiler adopting a low-nitrogen combustion mode, a pulverized coal burner is arranged in a main combustion area, and an over-fire air burner is arranged in an over-fire air area. When the unit operates at a deep peak regulation low load, because the coal burning quantity is less and the smoke quantity generated by combustion is not much, the combustion heat of the main combustion area is taken out by increasing the air supply quantity of the main combustion area and reducing the air supply quantity of the over-fire air area, so that the main reheat steam temperature under the low load is improved.
The utility model changes the lowest layer of over fire air burner of the boiler in the traditional low-nitrogen combustion mode into a coal-fired and over-fire dual-purpose burner, and the arrangement position is the same as that of the traditional lowest layer of over fire air burner; the rest pulverized coal burners and the over-fire air burners have the same structure and arrangement position as those of the traditional low-nitrogen combustion boiler, so that the characteristic of high-position arrangement of the dual-purpose burner can be fully utilized, and the height of the flame center can be flexibly adjusted.
When the unit operates at low load, the coal gate at the side of the coal powder pipeline burner and the side of the coal mill of the dual-purpose burner is opened, at the moment, the dual-purpose burner is similar to a small-sized coal powder burner, and the pulverized coal combustion of the dual-purpose burner is organized by adjusting the secondary air distribution mode of the dual-purpose burner. Most of pulverized coal is combusted through a pulverized coal burner positioned in a main combustion area, when flue gas flows through an over-fire air area, a small part of pulverized coal is combusted through a dual-purpose burner in a tissue mode, and the dual-purpose burner is positioned at the elevation of the over-fire air burner at the lowest layer of a boiler in a traditional low-nitrogen combustion mode and is arranged at the higher position of a hearth, so that the central height of flame can be raised, the temperature of the flue gas at the outlet of the hearth can be improved, and the total air volume of the boiler is basically kept unchanged, NOx generated by combustion is kept level or slightly increased compared with the traditional combustion mode, and the purposes of improving the main steam temperature and the reheated steam temperature can be;
when the unit runs at high load, the amount of flue gas generated by combustion is large, and the main steam temperature and the reheat steam temperature of the unit can meet the design value requirements, so that the coal gates at the side of the coal powder pipeline burner and the side of the coal pulverizer of the dual-purpose burner are closed, the dual-purpose burner is similar to an over-fire air burner at the moment, only secondary air passes through the dual-purpose burner to perform a hearth, and the aim of reducing NOx generated by combustion is fulfilled by an air staged combustion technology.
The utility model discloses a switch of dual-purpose type combustor pulverized coal pipeline combustor side, coal pulverizer side coal gate, dual-purpose type combustor can be adjusted respectively for burn out air burner, little pulverized coal burner according to the height of unit load, has realized the purpose of low nitrogen burning and improvement furnace export flue gas temperature on line, can adapt to the operation requirement of degree of depth adjustment better.
Because the coal powder pipelines of the dual-purpose burners at different positions have deviation along the way resistance, the wind speed of the coal powder in the coal powder pipelines is not uniform, adjustable shrinkage cavities are arranged on the coal powder pipelines of the dual-purpose burners, and the wind speed deviation between the dual-purpose coal powder pipelines is balanced within +/-5% by adjusting the opening degree of each adjustable shrinkage cavity. The dual-purpose burner pulverized coal pipeline is provided with a wave compensator which can absorb the expansion amount of the pulverized coal pipeline in a thermal state.
The pulverized coal concentrator is arranged in the pulverized coal nozzle of the dual-purpose burner, divides pulverized coal airflow entering the dual-purpose burner into thick pulverized coal airflow and light pulverized coal airflow, and mainly plays a role in improving the stable combustion capacity of the burner under low load and inhibiting the generation of NOx. When the pulverized coal concentrator is applied to a tangential firing boiler, the pulverized coal concentrator comprises a concentrator shell, concentrating blades and a middle partition plate; when the pulverized coal concentrator is applied to the opposed firing boiler, the pulverized coal concentrator is arranged at the position of the pulverized coal nozzle close to the end part of the hearth and is used for concentrating pulverized coal airflow before the pulverized coal airflow enters the hearth.
The burner has a central air nozzle in which direct air is provided, an over-fire air nozzle is cyclone air, an outer ring corresponding to the over-fire air nozzle is provided with cyclone blades, a burner cover plate is provided with a central air adjusting device and a cyclone blade adjusting device, wherein the central air adjusting device is used for adjusting the air volume of the central air nozzle of the over-fire and over-fire dual-purpose burner, and the cyclone blade adjusting device is used for adjusting the air volume and the cyclone strength of the over-fire air of the over-fire and over-fire dual-purpose burner. When the coal gate corresponding to the dual-purpose burner of the opposed firing boiler is opened, the dual-purpose burner is a small pulverized coal burner at the moment, the central direct-flow air provides air required by the initial combustion of pulverized coal, and the ignition distance of the pulverized coal is controlled by adjusting the central direct-flow air; the over-fire air is rotational flow air, and the air can absorb high-temperature flue gas by adjusting the rotational flow strength to provide heat for pulverized coal ignition. When the coal gate corresponding to the dual-purpose burner of the opposed firing boiler is closed, the dual-purpose burner is used as an over-fire air burner at the moment, air enters a hearth through a central air nozzle and an over-fire air nozzle, and the effects of controlling the central height of flame, providing air for unburned coal powder in smoke and reducing NOx generated by combustion are achieved through the proportion adjustment of direct current air and rotational flow air.
The dual-purpose burner coal powder nozzle of the opposed firing boiler is provided with a tooth-shaped annular combustion stabilizing ring made of ceramic materials, and the main function of the burner is to form a backflow area near the coal powder nozzle, so that the coal powder is quickly ignited after leaving the nozzle, and the combustion rate of the coal powder is accelerated.
The air box of the combustion system is divided into a pulverized coal burner air box and a coal and burnout dual-purpose burner air box which respectively supply air for the pulverized coal burner and the coal and burnout dual-purpose burner. Because the dual-purpose burner can be used as a small pulverized coal burner and an over-fire air burner, the dual-purpose burner is provided with a coal fire detection device to monitor the pulverized coal ignition condition, and the dual-purpose burner is incorporated into a boiler hearth safety monitoring system.
A coal-fired and burnout dual-purpose burner is arranged in a hearth burnout air area, and the coal-fired and burnout dual-purpose burner can flexibly act as a pulverized coal burner and a burnout air burner according to different unit loads by opening or closing a coal gate on a pulverized coal pipeline of the dual-purpose burner, so that NOx generated by combustion under low-load main reheat steam temperature and high load in the unit can meet the design value requirement.
When the unit operates under the medium-low load, the coal gate on the coal powder pipeline of the dual-purpose burner is opened, at the moment, the coal-fired and burnout dual-purpose burner serves as a small-sized coal powder burner, the coal-fired and burnout dual-purpose burner is arranged above the coal powder burner by 5-8 m, a small amount of coal powder is combusted under the organization of the coal-fired and burnout dual-purpose burner, the flame center of a hearth is lifted, the temperature of smoke at the outlet of the hearth is raised, and the main steam temperature and the reheated steam temperature of the unit under the medium-low load can meet the requirements of design values; when the unit operates under high load, the main steam temperature and the reheat steam temperature can reach design values, at the moment, a coal gate on a coal powder pipeline of the dual-purpose burner is closed, the coal-fired and burnout dual-purpose burner serves as a burnout air burner, and NOx generated by combustion can be reduced through air staged combustion.
Claims (10)
1. A burner system suitable for deep peak regulation is characterized by comprising a combustion system air box, a coal-fired and burnout dual-purpose burner (1), a pulverized coal burner (2) and a burnout air burner (3); the coal-fired and burnout dual-purpose burner (1) is positioned right below the burnout air burner (3); the coal-fired and burnout dual-purpose burner (1) is positioned right above the pulverized coal burner (2), the air box of the combustion system comprises a pulverized coal burner air box (4) and a coal-fired and burnout dual-purpose burner air box (5), the pulverized coal burner air box (4) is connected with the pulverized coal burner (2), and the coal-fired and burnout dual-purpose burner air box (5) is connected with the coal-fired and burnout dual-purpose burner (1) and the burnout air burner (3); the coal and burnout dual-purpose burner (1) is connected with a coal powder pipeline (6) of the dual-purpose burner.
2. The burner system suitable for deep peak shaving according to claim 1, wherein the dual-purpose burner (1) for coal burning and burnout is provided with a coal fire detection device; the coal-fired and burnout dual-purpose burner (1) is arranged above the pulverized coal burner (2) by 5-8 m.
3. The burner system suitable for deep peak shaving according to claim 1, wherein the coal-fired and burnout dual-purpose burner (1) is provided with a pulverized coal nozzle (13), the pulverized coal nozzle (13) is connected with a dual-purpose burner pulverized coal pipeline (6), the dual-purpose burner pulverized coal pipeline (6) is connected with a coal mill outlet pulverized coal pipeline (7), and the coal mill outlet pulverized coal pipeline (7) is connected with a coal mill (12).
4. The burner system suitable for deep peak shaving according to claim 3, wherein the outer diameter of the dual-purpose burner pulverized coal pipe (6) is 1/5-1/4 of the pulverized coal outlet pipe (7) of the coal mill, and the dual-purpose burner pulverized coal pipe (6) is made of Q235 steel.
5. The burner system suitable for deep peak shaving according to claim 1, wherein the coal mill side coal gate (11), the adjustable shrinkage cavity (9), the wave compensator (8) and the burner side coal gate (10) are arranged on the dual-purpose burner coal powder pipeline (6) in sequence.
6. Burner system suitable for deep peaking according to claim 1, characterized by an inlet elbow (20) provided at the inlet of the pulverized coal nozzle (13).
7. A burner system suitable for deep peak shaving according to claim 1, characterized in that the pulverized coal nozzle (13) is arranged between the lowest SOFA burner nozzle (19) and the next lower SOFA burner nozzle (19) when applied to a tangential firing boiler; a first pulverized coal concentrator (14) is arranged in the pulverized coal nozzle (13); the first coal dust concentrator (14) comprises a concentrator shell (15), a middle partition plate (17) is arranged in the concentrator shell (15), and concentrating blades (16) are arranged between the concentrator shell (15) and the middle partition plate (17).
8. The burner system suitable for deep peak shaving according to claim 7, wherein the area of the pulverized coal nozzle (13) is 1/5-1/4 of the nozzle of the pulverized coal burner (2); a swing actuating mechanism (18) is arranged in the coal powder nozzle (13).
9. The burner system suitable for deep peak shaving according to claim 1, wherein when the burner system is applied to an opposed firing boiler, the coal and burn-out dual-purpose burner (1) is further provided with a central air nozzle (21) and a burn-out air nozzle (22), the pulverized coal nozzle (13), the central air nozzle (21) and the burn-out air nozzle (22) are in concentric circle structures, and the pulverized coal nozzle (13), the central air nozzle (21) and the burn-out air nozzle (22) are respectively arranged from inside to outside; a conical pulverized coal concentrator (27) is arranged in the pulverized coal nozzle (13); the pulverized coal nozzle (13) is made of heat-resistant steel, the outer diameter of the pulverized coal nozzle (13) is 1/5-1/4 of the nozzle of the pulverized coal burner, and the tail end of the pulverized coal nozzle (13) is provided with a tooth-shaped annular combustion stabilizing ring (23) made of ceramic; the central air nozzle (21) is internally provided with direct current air, the overfire air nozzle (22) is provided with rotational flow air, and a wind channel corresponding to the overfire air nozzle (22) is internally provided with rotational flow blades (24).
10. A burner system adapted for deep peaking according to claim 9, wherein the dual-purpose coal and burnout burner (1) includes a cover plate on which a central air adjusting device (25) and a swirl vane adjusting device (26) are mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021631161.8U CN212408628U (en) | 2020-08-07 | 2020-08-07 | Combustor system suitable for degree of depth peak regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021631161.8U CN212408628U (en) | 2020-08-07 | 2020-08-07 | Combustor system suitable for degree of depth peak regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212408628U true CN212408628U (en) | 2021-01-26 |
Family
ID=74371563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021631161.8U Active CN212408628U (en) | 2020-08-07 | 2020-08-07 | Combustor system suitable for degree of depth peak regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212408628U (en) |
-
2020
- 2020-08-07 CN CN202021631161.8U patent/CN212408628U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111750346A (en) | Combustor system suitable for degree of depth peak regulation | |
| CN209978093U (en) | System for controlling temperature of boiler burner of coal-fired power plant to avoid burning loss | |
| CN112032711A (en) | Stable combustion burner based on temperature control of precombustion chamber and operation method thereof | |
| CN103486563B (en) | Supercritical once-through boiler capable of firing eastern Junggar coal | |
| CN210568371U (en) | Novel pulverized coal fired boiler low-nitrogen combustion system | |
| CN103672950B (en) | The firing optimization method of the W type flame furnace that the lower Secondary Air tilt angled down of arch is adjustable | |
| CN112902154A (en) | Over-fire air system with controllable steam temperature deviation and CO concentration at two sides of opposed firing boiler | |
| CN201606876U (en) | Low-NOx coal burner | |
| CN111486440A (en) | System and method for adjusting reheating steam temperature of W flame boiler by adopting flue gas recirculation | |
| CN212408628U (en) | Combustor system suitable for degree of depth peak regulation | |
| CN108317539A (en) | A kind of boiler secondary air subtube supply air system | |
| CN208652613U (en) | A kind of boiler secondary air subtube supply air system | |
| CN215174993U (en) | Air quantity and rotational flow double-regulation burner | |
| CN214840783U (en) | Concentrated type double-air-regulation rotational flow low-nitrogen combustor provided with central air | |
| CN115164226A (en) | Improve coal-fired unit operation flexibility and coal type adaptability's wind temperature governing system | |
| CN114659099A (en) | Flue gas circulation system for improving combustion characteristics and thermal characteristics of pulverized coal fired boiler | |
| CN108087868A (en) | A kind of Secondary Air gas fired-boiler with adjust automatically jet direction | |
| CN212298946U (en) | System for regulating reheating steam temperature of W flame boiler by adopting flue gas recirculation | |
| CN207990606U (en) | A kind of boiler is for exhaust system | |
| CN217154150U (en) | Boiler high temperature heating surface thermal deviation adjusting device | |
| CN104251487A (en) | Method for improving boiler combustion economy of tangential combustion anthracite coal boiler | |
| CN221076458U (en) | High-efficient W flame boiler over-fire air device of intensive mixing | |
| CN212565753U (en) | Stable combustion burner based on temperature control of precombustion chamber | |
| CN214664372U (en) | Over-fire air system for controlling steam temperature deviation and CO concentration of opposed firing boiler | |
| CN217154224U (en) | Direct-blowing pulverizing system with primary cooling fan and flue gas fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |