CN201166387Y

CN201166387Y - Pulverized coal boiler non-oil ignition starter

Info

Publication number: CN201166387Y
Application number: CNU2007203091987U
Authority: CN
Inventors: 王满家; 王屹东
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-28
Filing date: 2007-12-28
Publication date: 2008-12-17
Anticipated expiration: 2017-12-28

Abstract

The utility model provides an oil-free igniting starter of a pulverized coal fired boiler, which comprises an igniter and a controller, wherein the igniter takes a straight tube shape, a tube wall is divided into an outer layer, interlayer space and an inner layer in turn, wherein the outer layer is a heat-insulating layer, and the inner layer is a flame retardant coating. More than one electrical bar is arranged in the inner layer, the inlet end of the igniter is provided with a primary air air-supply pipe, and the air-supply pipe is coaxially threaded into the inner cavity of the igniter, the outer layer is provided with a secondary air air-supply pipe, and secondary air gets into from the outer layer, flows to the integral tube body along the interlayer space, and gets into the inner cavity of the igniter through a secondary air nozzle on the inner layer to form whirlwind, the outlet end of the igniter is extended to the hearth of a boiler, and the controller emits regulating signals to regulate the air quantity of the primary air and the secondary air and the electric power of the electrical bar. The utility model has the advantages of simple structure, simple maintenance, little starting energy, low operating cost and the like, which can consume less energy to ignite pulverized coal than other igniting mode, and saves energy source.

Description

Pulverized-coal fired boiler non-oil ignition starter

Technical field

The utility model relates to a kind of pulverized coal boiler ignition starting drive, especially pulverized-coal fired boiler non-oil ignition starter.

Background technology

When modern age, pulverized-coal fired boiler started operation, all adopt the grease gun igniting coal dust that ignites to start boiler, treat that burner hearth burns coal powder ignition when putting above high temperature, just drop into coal dust, throw the Starting mode of coal behind this first oil firing, need expend a large amount of fuel oil, this is that energy policy institute is unallowable.Because coal dust is to mix the back at the solid fuel that the pipeline high speed flows with air, wants its igniting to be ignited in the short time at the utmost point, exists certain technical difficulty, this is the problem of present just countries in the world research also.

Summary of the invention

The purpose of this utility model is to propose a kind of pulverized-coal fired boiler non-oil ignition starter.The utility model is used the comprehensive combustion technology in design, can remove the coal dust that ignites with less energy, saves fuel oil, reduces production costs.

The technical solution of the utility model is: design a kind of pulverized-coal fired boiler non-oil ignition starter, it comprises igniter and controller; Described igniter is straight tubular, and barrel is divided into skin, mezzanine space and internal layer successively, and skin is a heat-insulation layer, and internal layer is a flame retardant coating; In internal layer, be provided with an above electrical bar; The arrival end of described igniter is provided with primary air intake pipe, this blast pipe axially feeds the igniter inner chamber, skin is provided with secondary air intake pipe, secondary wind enters and to flow to cylindrical shell along mezzanine space whole from skin, overfire air jet on internal layer enters the igniter inner chamber again, form whirlwind, the port of export of igniter passes to boiler furnace; Described controller sends conditioning signal according to temperature detection and flame detection signal and goes to regulate primary and secondary air air quantity and electrical bar electrical power.

In the above-mentioned starter, described cylindrical shell internal layer top is provided with the convex concave temperature-resistant material, forms effect of boundary layer.

In the above-mentioned starter, described igniter is the fusiformis that is small at both ends and big in the middle, and arrival end forms the flaring district, and the port of export forms the taper, produces the Laval effect.

In the above-mentioned starter, be respectively equipped with a plurality of apertures on the inside and outside wall of described internal layer.

In the above-mentioned starter, be provided with ventilation accumulation of heat exotic material in the middle of the described internal layer.

In the above-mentioned starter, described controller extracts this district's temperature detection signal from igniter internal layer and inner chamber, extract the flame detection signal from the igniter inner chamber, extracts secondary air temperature degree detection signal from interlayer.

In the above-mentioned starter, other has oxygen cathete to feed in the described igniter, so that also can ignite when quality of pc is relatively poor.

In the above-mentioned starter, described device is provided with 1-50 layer overfire air jet from top to bottom.

In the above-mentioned starter, the overfire air jet of described device tangentially is provided with.

In the above-mentioned starter, every layer of overfire air jet is 2-50.

Pulverized-coal fired boiler non-oil ignition starter of the present utility model compared with prior art has the following advantages:

1, this device adopts the coal dust coal dust that ignites, and has saved fuel oil, has extremely far-reaching energy strategy meaning.

2, this device combines multiple principles such as not burning of horse, cyclone firing, particularly boundary layer theory and Laval effect and electrical heating method, and design concept is perfect, and is ingenious, original and different, project organization is simple, safeguards easily, it is little to start energy, and operating cost is low.

3, it is integrated that this device makes factory's fuel, need not to set up fuel oil equipment and oil supply pipe, saves capital expenditure and administrative expenses.

4, this device can manufacture different thermal powers and be applicable to dissimilar pulverized-coal fired boilers.

5, this device is an external, as long as a secondary air channel of former boiler is connected with this device and can uses, easy for installation, on-the-spot retrofit work amount is little, is easy to promote.

6, this device can be made the usefulness of low-load combustion-stabilizing.

7, this device can reduce the poisoning to electric cleaner, helps environmental protection.

Description of drawings

Fig. 1 is the structural representation of pulverized-coal fired boiler non-oil ignition starter of the present utility model;

Fig. 2 is the profile of non-oil ignition starter combustion zone;

Fig. 3 is the I portion enlarged drawing among Fig. 1;

Fig. 4 is that H1 among Fig. 3 or H2 are to looking expanded view.

The specific embodiment

Below in conjunction with drawings and Examples, further specify non-oil ignition starter of the present utility model.

With reference to Fig. 1-Fig. 4, pulverized-coal fired boiler non-oil ignition starter of the present utility model comprises igniter and controller.Igniter is the fusiformis cylindrical shape that is small at both ends and big in the middle, and adopts fire-resistant steel weldering system to form, and arrival end forms the flaring district, and the port of export forms the taper, produces the Laval effect; Barrel is divided into skin, mezzanine space and internal layer successively; Outer 1 is the insulation layer, is surrounded by heat-insulation material to prevent radiation loss; Middle mezzanine space 3 produces rotation wind in order to lead to cooling air and to spray in tube; Electrical bar 18 is set in the internal layer 2, offer a plurality of airing holes 19 (do not require and be symmetrical arranged) on the inside and

outside wall

20,21 of internal layer 2 respectively, be provided with ventilation accumulation of heat exotic material 22 in the middle of the internal layer 2, in order to the heat energy in the internal layer 2 is passed in the inner chamber 16 fast, and guarantee that inner chamber 16 heats up smoothly and the igniter body in lay in a large amount of heat energy; The igniter internal chamber wall is provided with convex concave temperature-resistant material 13, with the frictional force that increases the boundary layer coal dust is increased the effect of persisting, and forms effect of boundary layer, and the combustion space is heated to 1000 ℃ of high temperature, far surpasses the ignition temperature of coal dust; Igniter inner chamber 16 is provided with overfire air jet 14, is presented among the figure to be provided with 4 layers of overfire air jet in the instantiation, and the arrival end of igniter is provided with primary air intake pipe 12, and primary air intake pipe axially feeds igniter inner chamber 16; Outer 1 upper right quarter is provided with secondary air intake pipe 15, secondary wind flows to cylindrical shell along the direction of arrow in mezzanine space 3 whole, from a plurality of overfire air jets 14 adherent cyclone firing districts that tangentially spray into, secondary wind has been brought into play cooling metal sheets and has been strengthened the effect of burning, controls ignition temperature simultaneously again; The port of export of igniter passes to boiler furnace.Controller extracts this district's temperature detection signal 8 and

flame detection signal

5,7 from igniter inner chamber 16, from internal layer 2, extract temperature detection signal 6, from mezzanine space 3, measure secondary air temperature degree signal 4, send the conditioning signal electrical power 9 of control wind adjustment doors 11, secondary wind adjustment doors 10 and an electrical bar automatically according to these detection signal controllers, safely and steadily run to guarantee igniter.

When quality of pc is relatively poor, can set up oxygen cathete 17 and feed in the igniter, make the igniter inner chamber increase oxygen and supply with, so that ignite.

With reference to Fig. 2, the overfire air jet 14 in cyclone firing district tangentially is provided with, and in an instantiation, every layer of overfire air jet is 14.

The operation principle of non-oil ignition starter of the present utility model is: a wind that has coal dust, from the arrival end nozzle shaft to spraying into the igniter inner chamber, the coal dust that axially enters, at first ignited by high temperature at the igniter inner chamber, mix with the secondary wind that tangentially sprays into then, strengthen burning and spray also to the exit by A, B, C, D step by step strengthening step by step.Take the positive feedback mode that ignites step by step, make that a single spark can start a prairie fire, reach energy with minimum maximum coal dust that ignites.Controller is according to detection signal, send conditioning signal, with regulating shaft to the allocation proportion of advancing the secondary wind that coal and each layer of ABCD tangentially enter, regulate the power of secondary air flow and electrical bar, the ignition temperature in the control cylindrical shell makes coal dust obtain smooth combustion in cylindrical shell, prevent that coking from guaranteeing flameholding and security of operation, whole combustion process is automatically being carried out under the control, spray temperature at last and reach thermal-flame more than 1000 ℃, thereby reach the purpose that starts boiler operatiopn.

Claims

1, a kind of pulverized-coal fired boiler non-oil ignition starter is characterized in that it comprises igniter and controller; Described igniter is straight tubular, and barrel is divided into skin, mezzanine space and internal layer successively, and skin is a heat-insulation layer, and internal layer is a flame retardant coating; In internal layer, be provided with an above electrical bar; The arrival end of described igniter is provided with primary air intake pipe, this blast pipe axially feeds the igniter inner chamber, skin is provided with secondary air intake pipe, secondary wind enters and to flow to cylindrical shell along mezzanine space whole from skin, overfire air jet on internal layer enters the igniter inner chamber again, form whirlwind, the port of export of igniter passes to boiler furnace; Described controller sends conditioning signal according to temperature detection and flame detection signal and goes to regulate primary and secondary air air quantity and electrical bar electrical power.

2, pulverized-coal fired boiler non-oil ignition starter according to claim 1 is characterized in that, described cylindrical shell internal layer top is provided with the convex concave temperature-resistant material.

3, pulverized-coal fired boiler non-oil ignition starter according to claim 1 is characterized in that, described igniter is the fusiformis that is small at both ends and big in the middle, and arrival end forms the flaring district, and the port of export forms the taper.

4, pulverized-coal fired boiler non-oil ignition starter according to claim 1 is characterized in that, is respectively equipped with a plurality of apertures on the inside and outside wall of described internal layer.

5, pulverized-coal fired boiler non-oil ignition starter according to claim 4 is characterized in that, is provided with ventilation accumulation of heat exotic material in the middle of the described internal layer.

6, according to the arbitrary described pulverized-coal fired boiler non-oil ignition starter of claim 1 to 5, it is characterized in that, described controller extracts this district's temperature detection signal from igniter internal layer and inner chamber, extract the flame detection signal from the igniter inner chamber, extracts secondary air temperature degree detection signal from interlayer.

7, pulverized-coal fired boiler non-oil ignition starter according to claim 6 is characterized in that, other has oxygen cathete to feed in the described igniter.

8, pulverized-coal fired boiler non-oil ignition starter according to claim 7 is characterized in that, described device is provided with 1-50 layer overfire air jet from top to bottom.

9, pulverized-coal fired boiler non-oil ignition starter according to claim 8 is characterized in that the overfire air jet of described device tangentially is provided with.

10, pulverized-coal fired boiler non-oil ignition starter according to claim 9 is characterized in that, every layer of overfire air jet is 2-50.