CN1037027A

CN1037027A - Smoke and steam injection combustion device with the what boiler

Info

Publication number: CN1037027A
Application number: CN 88101971
Authority: CN
Inventors: 沈青; 王石民
Original assignee: TECHNOLOGY IMPROVEMENT SERVICE CO OF MUDANJIANG CITY
Current assignee: TECHNOLOGY IMPROVEMENT SERVICE CO OF MUDANJIANG CITY
Priority date: 1988-04-15
Filing date: 1988-04-15
Publication date: 1989-11-08

Abstract

The smoke and steam injection combustion device that is used for boiler is to be formed by the winding that links to each other of nozzle (7), steam connecting duct (5), airstream deflector (4) and transition conduit and flange (1), and installs nozzle casing (8) additional in its outside.Steam enters burner hearth from the jet hole slit that is the duckbilled flat, simultaneously, the steam that from the airstream deflector aperture, comes out on a small quantity going along with the inboard air of nozzle casing (8) also enter together.Because small amount of steam enters burner hearth, improved combustion process, enlarged the scope that boiler uses coal.

Description

Smoke and steam injection combustion device with the what boiler

Smoke and steam injection combustion device with the what boiler is the device for eliminating smoke and dust that a kind of overheavy firing of using what Industrial Boiler aspect is used, particularly can be used as the coal-saving device of boiler, existing industry coal-boiler, use the changeable of coal by what, cause in actual motion and the phenomenon that burning is bad, furnace temperature is on the low side can occur, when using time matter coal even circuit fire phenomenon occurs, cause emerge in the boiler operatiopn a large amount of black smokes and atmosphere pollution, applying steam sprays smoke eliminating blower especially can solve the bad problem of boiler combustion when using time matter coal.

For improving the burning of boiler with multiple fire coal, now adopt the additive air nozzle in burner hearth, to blow bulging air, so that fired coal combustion method completely, but adopt this method, wayward suitably by what air supply amount, often cause that fire box temperature descends when blowing bulging air excess, when air capacity is not enough burning still incomplete, therefore can not solve the problem that coal changes the bad and spray over-emitting black exhaust of burning that the back occurs.

The smoke and steam injection combustion device that the present invention proposes is to spray a certain amount of steam in the burner hearth of coal-burning boiler, has formed water-gas after spraying into burner hearth by the what small amount of steam, wherein CO and H ₂Burning improved fire box temperature greatly, the iron sulfide combustion heat that forms in the ferrous disulfide in the coal and the course of reaction of water vapour also helps improving fire box temperature.Sprayed from the duckbill nozzle by what steam, the sound wave vibrations of formation are beneficial to and smash the suspension carbon granules, and also favourable what burning fully.There is a small amount of water vapor in the burner hearth, correspondingly increased by three atoms (RO^j2) gas blanket, can produce strong heat radiation to coal seam and water-cooling wall, thereby improve service capacity.Simultaneously, steam sprays into the disturbance that has aggravated in the burner hearth, makes the coal grain obtain burning more completely.After adopting smoke and steam injection combustion device, also can cancel air blast, this has not only reduced power consumption and has also reduced noise pollution.

The smoke and steam injection combustion device with the what boiler that the present invention proposes is to be formed by following all parts windings.Flange joins with screw thread screw thread and the transition conduit of regulating steam valve, the transition conduit of the other end by regulating steam valve is joined with screw thread screw thread and airstream deflector, the other end of airstream deflector is with screw thread screw thread tipping steam connecting duct, steam connecting duct end is welded with nozzle, and this nozzle is the duckbill nozzle in flat slit.Add nozzle casing in the smoke and steam injection combustion device outside.Regulate on the transition conduit of steam valve rear end Pressure gauge is housed.For regulating the axial location of nozzle, the steam connecting duct is divided into two sections and connects with screwed pipe.And with this pipe of bracket supports, to solve the cantilever installation question.

The burner hearth end that stretches into of nozzle casing is horn-like, stretches into to be welded with length on garden, outside week of furnace wall part and to be not more than 30 millimeters suspension hook different in size, again the alumina cement protective layer of 40 millimeters of not little whats of applied thickness on this garden, outside week.

The spout of Duckbill type nozzle is flat duckbill, and the spout slit is between 0.2 millimeter to 2 millimeters, and the slit is extended or extended along the garden arc at nozzle face along the nozzle face center line, and the flat slit arc length of spout is between 20 ° to 160 °.Weld after the non-spout end of nozzle closes up with the steam connecting duct, this nozzle is with heat resisting steel or with 1 chromium, 13 silicon 2(1Cr13S ₁₂) or pottery make.

Airstream deflector is that conically shaped two ends respectively connect a garden socket and form.Have one of many what at conically shaped stub end end face, the through hole of diameter between 0.2 millimeter to 5 millimeters, the parallel what conically shaped of the center line in this hole hypotenuse that is to say that the angle of the center line of above-mentioned through hole and conically shaped center line equals the cone angle of 1/2nd conically shapeds.

Flange is made up of two flanges that can rotate mutually, has several through holes on this two flange, rotates a flange, and the relative position of the above-mentioned through hole that then staggers and regulating enters the inlet port area of the air in the nozzle casing.Size, quantity and the position of the through hole on two flanges are identical.

After adopting the smoke and steam injection combustion device with the what boiler of the present invention's proposition, can not only strengthen the burning of various coals, in the coal combustion process, play combustion-supporting effect and reach smoke effect, solved by what and used the phenomenon of moving behind coal changes and occur new coal seam cutoff or the ignition point, enlarged the scope that boiler uses coal.And also can cancel air blast to the boiler below the what 6t/h.

Fig. 1 is the smoke and steam injection combustion device scheme of installation

Fig. 2 is a smoke and steam injection combustion device assembling schematic diagram

Fig. 3 is the A-A profile of Fig. 2

Fig. 4 is the B-B profile of Fig. 2

Fig. 5 is the C-C profile of Fig. 2

Fig. 6 is the heterotypic spray nozzle schematic diagram

Fig. 7 is the side view of Fig. 6

Shown in Figure 1 is the scheme of installation of smoke and steam injection combustion device.Nozzle casing (8) stretches into the burner hearth end and is horn-like, and the outside of stretching into furnace wall part is welded with 30 millimeters of highly maximum little whats, suspension hook (9) different in size, and applies with alumina cement protective layer (10).Nozzle casing (8) is installed at the smoke eliminating blower outside, the non-burner hearth end of nozzle casing (8) combines with flange (1), flange (1) is to constitute (Fig. 2 and 4) by two flanges that can rotate and have six same uniform equirotal through holes mutually, mutual differential rotary flange, then change the via area that enters of the air enter between nozzle casing (8) and the smoke eliminating blower, the adjusting steam valve (2) and the Pressure gauge (3) that are contained between airstream deflector (4) and the flange (1) spray into the pressure and the flow of steam in order to adjusting, and can indicate supervision steam to spray into pressure.Support (6) is that general A-frame is in order to supporting nozzle and conduit (as shown in Figure 2).

Airstream deflector (4) middle part be a conical pipe, and two ends are the garden column jecket, and the three is one and concentric, and the cone angle of conical pipe is 60 °, has 8 small through hole on the conical pipe stub end end face sidewall, and this small through hole diameter is 1 to 1.5 millimeter (shown in Figure 3 as Fig. 2).This small through hole center line and conical pipe center line are that airstream deflector (4) center line angle is 30 °, and airstream deflector (4) one ends join by transition conduit and flange (1), and the other end and steam connecting duct (5) join.Steam connecting duct (5) is formed by two sections, and with tapped sleeve pipe these two sections steam connecting ducts is fused, and adjusts the length of this pipe with it.

Nozzle (7) is welded in the termination of steam connecting duct (5), and nozzle (7) is to make with heat resisting steel, also available 1Cr13Si ₂Or pottery is made.Nozzle (7) is duckbilled flat (Fig. 2, Fig. 5), and jet hole is a slit crack, and extend along nozzle termination center line in the slit, and gap width is between 0.2 to 2 millimeter, and flat mouthful of shared arc length of nozzle is between 20 °-160 °.

Fig. 6 Figure 7 shows that another embodiment of nozzle, and dissimilarity is that extend with the garden arc in nozzle end in the spout slit, and shared garden arc length is between 110 °-180 °.

Smoke and steam injection combustion device is contained in the different parts of boiler, and then can improve the burning of the multiple coal of boiler to the burner hearth uperize, can enlarge the scope that boiler uses coal.For example three smoke eliminating blowers are set in AZD20-25/400 type spreader stoker boiler burner hearth rear horizontal, two smoke eliminating blowers respectively are set then can obtain very good effect in that spreader feeder is upper and lower, the slit width of the smoke eliminating blower nozzle of adorning is 2 millimeters, and the steam pipe diameter is 25 millimeters.

Claims

1, a kind of smoke and steam injection combustion device with the what boiler, its feature be at what, and this smoke eliminating blower is formed by the winding that links to each other of nozzle (7), steam connecting duct (5), airstream deflector (4) and flange (1), and its outside installs nozzle casing (8) additional.

2,, it is characterized in that nozzle (7) is the duckbill nozzle in flat slit according to the described smoke eliminating blower of claim 1.

3, according to the described smoke eliminating blower of claim 2, its feature is a slit at the spout of what nozzle (7), and extend along nozzle termination center line in this slit, perhaps extends along the garden arc in the nozzle termination.

4, according to the described smoke eliminating blower of claim 3, between 20 °-180 °, this gap width is the 0.2-2 millimeter to its feature in the flat slit of spout of what nozzle (7) arc length.

5, according to the described smoke eliminating blower of claim 1, its feature is made by heat resisting steel or 1Cr13Si2 or pottery at what nozzle (7).

6, according to the described smoke eliminating blower of claim 1, its feature is made up of two flanges that can rotate mutually at what flange (1), has several through holes respectively on this two flange.

7, according to the described smoke eliminating blower of claim 6, number of openings, size and the position of its feature on described two flanges of what is identical.

8, according to the described smoke eliminating blower of claim 1, its feature is a conical pipe at what airstream deflector (4) middle part, and two ends are the garden column jecket, and described conical pipe and two garden column jeckets join together, has the through hole of one of many what at conical pipe stub end end face.

9, described according to Claim 8 smoke eliminating blower, its feature is in the center line and the conical pipe parallel sided of the through hole of the described airstream deflector of what (4) middle part conical pipe stub end end face, and through-hole diameter is between the 0.2-5 millimeter.