阅读说明：本技术 水泥窑三次风调节装置 (Tertiary air regulator for cement kiln ) 是由 徐金福 仝超 章武英 陈援兵 张小龙 于 2019-11-27 设计创作，主要内容包括：本发明公开了一种水泥窑三次风调节装置,该水泥窑三次风调节装置包括：蝶阀,蝶阀通过悬挂式单轴竖直固定于水泥窑的窑尾的顶部,窑尾的底部设置有凸台,蝶阀的底部形成有缺口,缺口与凸台之间形成有防积灰间隙。该水泥窑三次风调节装置具有耐冲蚀、磨损的效果,同时操作简便。(The invention discloses a cement kiln tertiary air adjusting device, which comprises: the butterfly valve, the butterfly valve passes through the vertical top that is fixed in the kiln tail of cement kiln of suspension type unipolar, and the bottom of kiln tail is provided with the boss, and the bottom of butterfly valve is formed with the breach, is formed with between breach and the boss and prevents the deposition clearance. The tertiary air adjusting device for the cement kiln has the effects of erosion resistance and abrasion resistance, and is simple and convenient to operate.)

1. The utility model provides a cement kiln tertiary air adjusting device which characterized in that includes: butterfly valve (2), butterfly valve (2) are fixed in through suspension type unipolar (18) is vertical the top of kiln tail (1) of cement kiln, the bottom of kiln tail (1) is provided with boss (3), the bottom of butterfly valve (2) is formed with the breach, be formed with between breach and the boss (3) and prevent deposition clearance (4).

2. The cement kiln tertiary air adjusting device according to claim 1, characterized in that the cross section of the boss (3) is trapezoidal in the direction of air flow.

3. The cement kiln tertiary air adjusting device according to claim 2, characterized in that the slope of the air inlet side of the boss (3) is smaller than the slope of the air outlet side of the boss (3).

4. The cement kiln tertiary air adjusting device according to claim 1, characterized in that the end of the hanging single shaft (18) extends to the outside of the kiln tail (1), and a turntable bearing (8) is fixed on the end of the hanging single shaft (18), the turntable bearing (8) is connected with a transmission gear (7), and the transmission gear (7) is meshed with an output shaft of a motor.

5. The tertiary air adjusting device for the cement kiln according to claim 1, characterized in that a castable layer (5) and a calcium silicate board layer (6) are sequentially arranged on the inner wall of the kiln tail (1) of the cement kiln from inside to outside.

6. The cement kiln tertiary air adjusting device according to claim 1, characterized in that the cross section of the kiln tail (1) is circular, the butterfly valve (2) comprises a rich butterfly valve framework and a plurality of prefabricated blades (12), and the prefabricated blades (12) are vertically fixed on the rich butterfly valve framework.

7. The cement kiln tertiary air adjusting device according to claim 6, characterized in that the rich butterfly valve frame comprises a main frame (9) and a plurality of groups of transverse frames (11), the transverse frames (11) are obliquely fixed on the main frame (9), the tail ends of the transverse frames (11) are upwards inclined, an included angle formed by the transverse frames (11) and a horizontal plane is not lower than 5 degrees, and the top of the main frame (9) is fixed on the suspension type single shaft (18).

8. The cement kiln tertiary air adjusting device according to claim 7, characterized in that each set of transverse frames (11) comprises at least two transverse ribs, at least two slotted holes (14) are arranged in the prefabricated blade (12) along the horizontal direction, and the transverse ribs can be inserted into the slotted holes (14); the top of the prefabricated blade (12) is provided with one of a V-shaped groove (16) and a V-shaped bulge (15), the bottom of the prefabricated blade (12) is provided with the other of the V-shaped groove (16) and the V-shaped bulge (15), and the V-shaped bulge (15) can be matched with the V-shaped groove (16).

9. The cement kiln tertiary air adjusting device according to claim 7, characterized in that the surface of the prefabricated blade (12) is provided with a clamping groove (17) along the vertical direction, and the clamping groove (17) can be clamped and nested (13).

10. The tertiary air adjusting device for the cement kiln according to claim 7, characterized in that the material of the tornado-shaped butterfly valve frame is 0Cr25Ni20 steel, and the material of the prefabricated blade (12) is high-alumina silicon carbide refractory material.

Technical Field

The invention relates to a cement kiln, in particular to a tertiary air adjusting device of the cement kiln.

Background

On a novel dry cement production line, the distribution of air quantity for a kiln and a decomposing furnace is realized by controlling the opening degree of a kiln tail necking and a tertiary air flashboard. The tertiary air gate plate is an important part for operating and controlling the kiln system, and has the main function of regulating and controlling the balance between the air volume used in the cement kiln and the air volume used in the decomposing furnace, and directly influencing the running rate of the cement kiln and the cement quality, so that the tertiary air gate plate has extremely high requirements on the reliability.

The domestic tertiary air flashboard usually adopts a heat-resistant steel butterfly valve, a heat-resistant steel flashboard gate or a heat-resistant steel castable gate, and common faults thereof are as follows: the gate plate is deformed and blocked, the castable is peeled and worn, and the gate plate is broken and damaged.

From the special working condition of the tertiary air pipe and the working environment of the flashboard, the heat-resistant steel butterfly valve has shorter service life which is only about 3 months because the whole flashboard is positioned in the tertiary air pipe and is directly contacted with high-temperature air flow; the service life of the heat-resistant steel flashboard gate is longer than that of a disc gate, the shaft and the flashboard are in direct contact with high-temperature airflow, and the flashboard shaft is seriously bent, cannot rotate and even is broken and damaged after being used for 4-6 months; the refractory steel castable gate plate is peeled off due to different thermal stresses, partially oxidized and burnt out due to leakage, and can be generally used for only 6-8 months if the gate plate is not blocked.

The tertiary air temperature is up to 1050 ℃, the tertiary air has a large amount of clinker particles, contains gas components such as chlorine, alkali and the like, has a scouring and eroding effect on the gate plate, and accelerates the erosion and abrasion of the tertiary air gate plate along with the temperature rise caused by full load, overload operation and misoperation of the cement kiln. As the tertiary air flashboard is gradually worn and loses the adjusting capability, the balance of the air for the decomposing furnace and the air for the kiln is damaged. The air quantity entering the kiln is reduced, the coal consumption at the kiln head is increased, the pulverized coal is not completely combusted, the reducing atmosphere in the kiln is serious, the FCaO content is higher, the quality of cement clinker is reduced, and the production cost of cement enterprises is increased.

At present, erosion and abrasion of the tertiary air gate plate are mainly accelerated due to the fact that clinker particles deposit and adhere near the tertiary air gate plate; meanwhile, the whole set of tertiary air flashboard is 3-5 tons in weight, is inconvenient to overhaul and replace, is difficult to install, has long overhaul period and cannot meet the market demand.

Disclosure of Invention

The invention aims to provide a tertiary air adjusting device for a cement kiln, which has the effects of erosion resistance and abrasion resistance and is simple and convenient to operate.

In order to achieve the above object, the present invention provides a tertiary air adjusting apparatus for a cement kiln, comprising: the butterfly valve, the butterfly valve passes through the vertical top that is fixed in the kiln tail of cement kiln of suspension type unipolar, and the bottom of kiln tail is provided with the boss, and the bottom of butterfly valve is formed with the breach, is formed with between breach and the boss and prevents the deposition clearance.

Preferably, the cross-section of the boss is trapezoidal along the direction of gas flow.

Preferably, the slope of the air inlet side of the boss is smaller than the slope of the air outlet side of the boss.

Preferably, the tail end of the suspension type single shaft extends to the outside of the kiln tail, a turntable bearing is fixed on the tail end of the suspension type single shaft, the turntable bearing is connected with a transmission gear, and the transmission gear is meshed with an output shaft of the motor.

Preferably, the inner wall of the kiln tail of the cement kiln is provided with a castable layer and a calcium silicate board layer from inside to outside in sequence.

Preferably, the cross section of kiln tail is circular, and the butterfly valve includes rich shape butterfly valve skeleton and polylith prefabricated blade, and the prefabricated blade is vertical to be fixed in on the rich shape butterfly valve skeleton.

Preferably, rich shape butterfly valve skeleton includes main skeleton and the horizontal skeleton of multiunit, and on the horizontal skeleton slope was fixed in main skeleton, the terminal tilt up of horizontal skeleton to the contained angle that horizontal skeleton and horizontal plane formed is not less than 5, and on the top of main skeleton was fixed in the suspension type unipolar.

Preferably, each group of transverse frameworks comprises at least two transverse frameworks, at least two slot holes are formed in the prefabricated blades along the horizontal direction, and the transverse frameworks can be inserted into the slot holes; the top of the prefabricated blade is provided with one of a V-shaped groove and a V-shaped bulge, the bottom of the prefabricated blade is provided with the other of the V-shaped groove and the V-shaped bulge, and the V-shaped bulge can be matched with the V-shaped groove.

Preferably, the surface of the prefabricated blade is provided with a clamping groove along the vertical direction, and the clamping groove can be clamped and nested.

Preferably, the material of the rich-shaped butterfly valve framework is 0Cr25Ni20 steel, and the material of the prefabricated blade is high-alumina silicon carbide refractory material.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a preferred embodiment of a tertiary air adjusting device of a cement kiln provided by the invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a schematic structural view of a preferred embodiment of the butterfly valve skeleton of the butterfly valve of FIG. 1;

FIG. 4 is a schematic diagram of the preferred embodiment of the butterfly valve of FIG. 1;

FIG. 5 is a schematic view of the structure of the prefabricated blade of FIG. 4;

FIG. 6 is a cross-sectional view taken along the line A-A in FIG. 5;

FIG. 7 is a sectional view in the direction of the arrow at C in FIG. 5;

fig. 8 is a cross-sectional view taken along the plane B-B in fig. 6.

Description of the reference numerals

1. Kiln tail 2, butterfly valve

3. Boss 4, gap for preventing dust deposition

5. Pouring material layer 6 and silicon-calcium plate layer

7. Transmission gear 8 and turntable bearing

9. Main framework 11 and transverse framework

12. Prefabricated blade 13, nesting

14. Slotted hole 15, V-shaped protrusion

16. V-shaped groove 17 and clamping groove

18. Suspended single shaft

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, unless otherwise specified, the directional words "upper, lower, inner, outer" and the like included in the terms merely represent the orientation of the terms in a conventional use state or are colloquially understood by those skilled in the art, and should not be construed as limiting the terms.

The invention provides a tertiary air adjusting device of a cement kiln, which comprises the following components as shown in figures 1-8: butterfly valve 2, butterfly valve 2 are through the vertical top that is fixed in the kiln tail 1 of cement kiln of 18 vertical suspension unipolar, and the bottom of kiln tail 1 is provided with boss 3, and butterfly valve 2's bottom is formed with the breach, is formed with between breach and the boss 3 and prevents deposition clearance 4.

The cement kiln tertiary air adjusting device is characterized in that the bottom of the kiln tail 1 is provided with the boss 3, the bottom of the butterfly valve 2 is provided with the notch, and the dust deposition preventing gap 4 is formed between the notch and the boss 3 (except the dust deposition preventing gap 4, the inner edge of the kiln tail 1 can be sealed by other edges of the butterfly valve 2). The density of clinker particles is high and the clinker particles are generally distributed below the fluid, the structure of the boss 3 can accelerate the wind speed at the bottom of the kiln tail 1, so that the clinker particles can rapidly pass through the tertiary air gate plate through the dust deposition preventing gap 4, the deposition and the adhesion of the clinker particles do not exist on the tertiary air gate plate, and the service life of the tertiary air gate plate is prolonged. Simultaneously, butterfly valve 2 has improved the convenience of butterfly valve 2's installation, maintenance through the setting of suspension type unipolar 18, has improved its use prospect. In addition, the suspended single shaft 18 can also avoid damage to the journal from high velocity high temperature dust.

In the present invention, the height of the anti-dust-deposition gap 4 can be selected in a wide range, but in order to ensure that the butterfly valve 2 can adjust the air intake of the kiln tail 1 and timely discharge clinker particles in the inlet air, the height of the anti-dust-deposition gap 4 is preferably 15-20cm and the diameter of the butterfly valve is preferably 2-3 m. The height of 15-20cm can simultaneously ensure two requirements of air inlet adjustment and clinker particles in the air inlet discharge.

In the present invention, the structure of the boss 3 can be selected in a wide range, but in order to further improve the flow velocity of the intake air at the bottom of the kiln tail 1, it is preferable that the boss 3 has a trapezoidal cross section along the direction of the air flow. The kiln tail 1 is provided with a necking structure by the arrangement of the lug boss 3, so that the air inlet flow speed at the bottom of the kiln tail 1 is improved, and the deposition of clinker particles is further avoided. In order to further enhance the effect of the boss 3, it is preferable that the slope of the intake side of the boss 3 is smaller than the slope of the exhaust side of the boss 3. In particular, the larger gradient of the air inlet side can not only improve the air speed, but also further avoid the deposition of clinker particles on the air inlet side.

In the present embodiment, the rotation of the butterfly valve 2 can be selected within a wide range, but in order to further improve the convenience of the operation of the butterfly valve 2, it is preferable that the tip of the hanging single shaft 18 extends to the outside of the kiln tail 1, and a turntable bearing 8 is fixed to the tip of the hanging single shaft 18, the turntable bearing 8 is connected to a transmission gear 7, and the transmission gear 7 is engaged with an output shaft of the motor. Therefore, as long as the motor is started, the turntable bearing 8 can be driven to rotate through the transmission gear 7, and the butterfly valve 2 is driven to open and close.

In the invention, in order to further avoid the damage of the kiln tail 1 from influencing the normal operation of the tertiary air adjusting device, the inner wall of the kiln tail 1 of the cement kiln is preferably provided with a castable layer 5 and a calcium silicate layer 6 from inside to outside in sequence. Therefore, the normal work of the kiln tail 1 of the cement kiln is effectively ensured through the dual guarantee of the castable layer 5 and the calcium silicate layer 6.

In the above embodiment, the specific structure of the butterfly valve 2 can be selected within a wide range, but in order to further ensure the convenience of installation of the butterfly valve 2, it is preferable that the cross section of the kiln tail 1 is circular, and the butterfly valve 2 includes a rich butterfly valve skeleton and a plurality of prefabricated blades 12, and the prefabricated blades 12 are vertically fixed on the rich butterfly valve skeleton.

In the above embodiment, in order to further improve the stability of the prefabricated blade 12 in the working process, preferably, the rich butterfly valve skeleton includes the main skeleton 9 and a plurality of sets of horizontal skeletons 11, and the horizontal skeleton 11 is obliquely fixed on the main skeleton 9, and the tail end of the horizontal skeleton 11 is inclined upwards, and the included angle formed by the horizontal skeleton 11 and the horizontal plane is not less than 5 °, and the top of the main skeleton 9 is fixed on the suspension type single shaft 18. The inclined arrangement of the transverse framework 11 can avoid the prefabricated blades 12 from falling off from the transverse framework 11.

On the basis of the above embodiment, in order to further improve the stability and the service life of the prefabricated blade 12, preferably, each group of the transverse frameworks 11 includes at least two transverse bones, at least two slot holes 14 are formed in the prefabricated blade 12 along the horizontal direction, and the transverse bones can be inserted into the slot holes 14; the top of the prefabricated blade 12 is provided with one of a V-shaped groove 16 and a V-shaped protrusion 15, the bottom of the prefabricated blade 12 is provided with the other of a V-shaped groove 16 and a V-shaped protrusion 15, and the V-shaped protrusion 15 is capable of mating with the V-shaped groove 16. The cooperation of slotted hole 14 and horizontal skeleton 11 then makes prefabricated blade 12 need not the bolt to improve the installation convenience of prefabricated blade 12, the slope setting of horizontal skeleton 11 simultaneously makes prefabricated blade 12 lean on dead weight locking, further improved the stability of prefabricated blade 12. Meanwhile, the coupling assembly structure of the V-shaped groove 16 and the V-shaped protrusion 15 can prevent external clinker particles or dust from entering the inside of the structure of the prefabricated blade 12, so that the service life of the prefabricated blade 12 is prolonged.

Furthermore, on the basis of the above-described embodiment, in order to further improve the stability of the prefabricated blades 12, it is preferable that the included angle is 8 to 10 °, and the number of the prefabricated blades 12 is 12.

In addition, in order to further improve the stability of the prefabricated blade 12, preferably, a clamping groove 17 is formed in the surface of the prefabricated blade 12 along the vertical direction, the nesting sleeve 13 can be clamped in the clamping groove 17, and the nesting sleeve 13 and the rich-shaped butterfly valve framework are fixed through a fixing piece. Therefore, the nesting 13 can further assemble the prefabricated blade 12 into an integral structure, and meanwhile, the prefabricated blade 12 can be fixed on the rich butterfly valve framework to further improve the stability of the prefabricated blade 12.

Finally, in addition to the above embodiments, in order to further improve the service life of the prefabricated blade 12, it is preferable that the material of the tornado-shaped butterfly valve frame is 0Cr25Ni20 steel, and the material of the prefabricated blade 12 is a high-alumina silicon carbide refractory. The two materials can ensure free expansion of the round butterfly valve framework and the prefabricated blade 12, so that the situation that the butterfly valve is damaged due to the fact that the expansion difference between the prefabricated blade 12 and the round butterfly valve framework is too large is avoided.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.