CN101101117A

CN101101117A - Self-breathing heat-accumulating burner capable of preventing coal gas leakage

Info

Publication number: CN101101117A
Application number: CNA2007101195454A
Authority: CN
Inventors: 夏德宏; 郑克明; 薛根山; 敖雯青
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2007-07-26
Filing date: 2007-07-26
Publication date: 2008-01-09

Abstract

The invention relates to self breathing heat storage burner nozzle avoided coal gas entrainment leakage. It is set separator of which front is set gas passage; back is set regenerator. Coal gas passage is set at its center line. The regenerator has four. Heat retaining mass is set in it, processed reversing heat retaining burn by four-way discharge switch valve. Its features are that all the pipelines are convergent structure; each gas passage end is set one side hole; forming annular tubes is used as high speed air injection port with flat loop type. It has the advantages of compact structure, good gas outlet mixture, even furnace temperature, and little pollutant.

Description

A kind of coal gas that prevents entrainments the heat-accumulating burner of breathing certainly that leaks

Technical field:

The invention belongs to industrial furnace environmental protection and energy saving field, relate to a kind of coal gas that prevents and discharge with flue gas stream and entrainmented the heat-accumulating burner of breathing certainly that leaks, be applicable to the gaseous fuel and the hot dirty producer gas of high heating value.

Background technology:

One, traditional heat-accumulating burner need the burner hearth both sides to settle burner, and per two burners form one group, constantly commutate and alternate combustion.But, can only settle burner in a side of burner hearth sometimes in the industrial production; Have, when fuel was hot dirty producer gas, gas port can not interrupt commutation, otherwise causes the coking and blocking of burner easily again, and at this moment traditional heat-accumulation combustion just can not adopt.

Its two, self heat-accumulating burner effect is bad more at present, mainly is that some coal gas is as easy as rolling off a log is gone out by pump drainage with flue gas, causes the waste of the energy and the scaling loss of heat storage because the burner exhaust opening is very near from the coal gas entrance.Shortcomings such as it is oversize that these burners also exist burner in addition, and air, coal gas mix in bad order, and the inhomogeneous and NOx of fire box temperature is seriously polluted.

Summary of the invention

Purpose of the present invention is very near from the coal gas entrance in order to solve traditional burner exhaust opening, some coal gas is as easy as rolling off a log to be entrainmented away with flue gas, cause coking and blocking, the burner burner of the problem of scaling loss of the waste of the energy and heat storage and burner oversize, problems such as air, coal gas mix in bad order, and fire box temperature is inhomogeneous.

A kind of coal gas that can prevent entrainments the heat-accumulating burner of breathing certainly that leaks, and is provided with dividing plate, and the dividing plate front is the gas passage that refractory material is made, and the dividing plate back is a regenerator, in the centerline of burner the coal gas steam line is arranged; There are relative air intake and relative exhanst gas outlet in the burner end, and two groups of independently regenerator are arranged in the burner shell, is connected with relative air intake and relative exhanst gas outlet respectively, and burner is finished reversing combustion by a four-way for exhaust switchover valve.It is characterized in that:

1. gas piping and air (flue gas) passage all adopts tapered configuration.

2. the end of each air (flue gas) passage has a side opening and is attached thereto logically, and side opening can vertically be opened also and can open sideling.

3. having one, to constitute a sleeve pipe with concentric pipeline of gas piping and gas piping be the high-speed air entrance, and the annulus area of sleeve pipe outlet is about 1/10～1/14 of gas exit area.

4. the passage of gas piping periphery, one group of the formation in twos on the diagonal, one as air intlet, and another is as exhanst gas outlet, and constantly switches burning.

5. to be installed in a cross section be in the foursquare burner block in the burner end when burner was installed, with corresponding foursquare four angles of four side openings.

6. burner air entrance is flat ring-like.

Two four-way is arranged for exhaust switchover valve on the burner shell, cross valve is connected with blower unit with two groups of heat storages and air blast with pipeline respectively, four-way confession exhaust switchover valve with controller switch at set intervals first power to; In burner when work,, two groups of heat storages are alternately heated by flue gas or preheated air is realized energy-conservation.

Operation principle

The all gas passages of this burner adopts tapered configuration, and concerning gas piping, reducing pipe converges to the centre after making coal gas enter burner hearth, and concerning ambient air (flue gas) passage, the resistance on top strengthens in the time of making smoke evacuation, reduces the exhaust smoke level on top.The end of each air (flue gas) passage has a side opening and is attached thereto logical, when side opening along the smoke evacuation direction when opening bigger hole sideling, the resistance in the time of reducing the side opening smoke evacuation greatly becomes main exhaust opening, simultaneously can increase the flue gas recirculation multiplying power, reduce and pollute.Gas piping has one outward, and to constitute a sleeve pipe with concentric pipeline of gas piping and gas piping be the high-speed air entrance, and the sleeve pipe area of injection orifice is very little but can effectively isolate coal gas and flue gas, reduces entrainmenting of coal gas and leaks.Burner air entrance is flat ring-like, can mix behind air and the gas exit so better, and fire box temperature is more even.Utilize two bellows to be linked to be one group to the heat storage at diagonal angle, make nozzle structure compacter.To be installed in a cross section be in the foursquare burner block in the burner end when burner was installed, with corresponding foursquare four angles of four side openings, whole like this burner can be installed in the furnace wall, do not have the part that is suspended in the burner hearth, can prolong the life-span of burner, effectively utilize the effect of side opening simultaneously again.

This burner air, coal gas separate fully, and security is good; Each burner is independent, and is less with the relevance of body of heater, can carry out online adjusting and On-line Control respectively, reduced failure risk, is convenient to engineering management.

Description of drawings

Fig. 1 is that this looks schematic diagram from the master who breathes heat-accumulating burner;

Fig. 2 is that this looks schematic diagram from the right side of breathing heat-accumulating burner;

Fig. 3 is that this is from the bellows schematic diagram of breathing heat-accumulating burner;

Fig. 4 is that this is from the installation design sketch of breathing heat-accumulating burner;

The specific embodiment

Dividing plate 1 is arranged among the figure, it behind the dividing plate regenerator 2, gas tapered channels 3 for making before the dividing plate by refractory material, each air (flue gas) passage has side opening 4, centerline at installing plate and burner shell is a coal gas steam line 5, and high-speed air sleeve pipe 6, two pipelines are by the fixing position each other of 4～8 ribs, and the annulus area of sleeve pipe outlet is about 1/10～1/14 of gas exit area; Two relative air ducts converge and converge to bellows 8 to bellows 7, two relative exhaust gases passes, two bellows are received one two position four-way valve 9 with pipeline respectively, two interfaces in addition of cross valve are connected with blower unit with air blast respectively, burner just can be finished the requirement of switching burning like this, the spout of burner end has gas port 10 respectively, 11, two relative air intlets 12 of sleeve pipe high-speed air entrance, and two relative exhanst gas outlets 13.

Claims

1, be provided with dividing plate, the dividing plate front is the gas passage that refractory material is made, and the dividing plate back is a regenerator, in the centerline of burner the coal gas steam line is arranged; There are relative air intake and relative exhanst gas outlet in the burner end, and regenerator is arranged in the burner shell, and two-part regenerator is connected with two preheated air spouts at diagonal angle, burner end respectively, and burner is finished reversing combustion by a four-way for exhaust switchover valve; It is characterized in that: coal gas and air, flue all adopt tapered configuration.

2, a kind of coal gas that prevents as claimed in claim 1 entrainments the heat-accumulating burner of breathing certainly that leaks, and it is characterized in that: the end of each air, exhaust gases passes has a side opening and is attached thereto logically, and side opening is vertically opened or opened sideling.

3, a kind of coal gas that prevents as claimed in claim 1 entrainments the heat-accumulating burner of breathing certainly that leaks, it is characterized in that: having one, to constitute a sleeve pipe with concentric pipeline of gas piping and gas piping be the high-speed air entrance, and the annulus area of sleeve pipe outlet is 1/10～1/14 of a gas exit area.

4. a kind of coal gas that prevents as claimed in claim 1 entrainments the heat-accumulating burner of breathing certainly that leaks, it is characterized in that: the passage of gas piping periphery, one group of the formation in twos on the diagonal, one as air intlet, another is as exhanst gas outlet, and constantly switching burning.

5. a kind of coal gas that prevents as claimed in claim 1 entrainments the heat-accumulating burner of breathing certainly that leaks, and it is characterized in that: to be installed in a cross section be in the foursquare burner block in the burner end when burner was installed, with corresponding foursquare four angles of four side openings.

6. a kind of coal gas that prevents as claimed in claim 1 entrainments the heat-accumulating burner of breathing certainly that leaks, and it is characterized in that: burner air entrance is flat ring-like.