CN216898373U

CN216898373U - Sealing device of belt sintering and pellet roasting machine

Info

Publication number: CN216898373U
Application number: CN202123403363.4U
Authority: CN
Inventors: 王荣成
Original assignee: Zhejiang Boyi Environmental Technology Co ltd
Current assignee: Zhejiang Boyi Environmental Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-05
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a sealing device of a belt sintering and pellet roasting machine, which comprises water tanks, water, a water receiving and leaking hopper, a water collecting tank, a sealing plate and a water pump, wherein the water tanks are respectively arranged on air box cross beams on two sides of an air box and are positioned between rails on two sides of a trolley and air box longitudinal beams, the head end and the tail end of each water tank respectively exceed the outer edges of a head-tail sealing device of a sintering machine, the sealing plates are respectively and fixedly connected to the lower parts of two sides of the trolley at positions corresponding to the water tanks, the water is injected into the water tanks, the sealing plates fixedly connected to the trolley are inserted into the water in the water tanks, the sealing plates move along with the trolley during production of the sintering machine, and water sealing is formed between two sides of the trolley of the sintering machine and the air boxes. The utility model provides a brand-new and simple and feasible water sealing device between two sides of a sintering machine trolley and an air box, which is to keep the original sealing between two side sliding plates and a slideway, and arrange a water sealing device at the outer side of the sliding plates to reduce the air leakage rate between two sides of the sintering machine trolley and the air box to be below 5 percent.

Description

Sealing device of belt sintering and pellet roasting machine

Technical Field

The utility model relates to the field of iron ore sintering machine and pellet roasting machine equipment, in particular to a sealing device of a belt type sintering and pellet roasting machine.

Background

The specific power consumption of the sintering plant varies according to the equipment, and is generally about 25 kilowatt-hours per ton of sinter. Wherein 70-75% of the electricity is consumed by the main fan. If the energy of the fan is fixed, the more the air leakage rate is, the less the air quantity passing through the sintering ore bed is, the greater the influence on the yield is, and in order to meet the requirements of sintering production, the larger fan is needed, which causes a great amount of unnecessary power consumption. Therefore, the presence or absence of good sealing is of great significance in improving the productivity of the sintering equipment.

According to the current technical level and the negative pressure of a fan, the air leakage rate of sintering is about 50%, wherein the air leakage rate of a sintering machine body is 45%, the end part of the sintering machine is about 18%, and the side part of the sintering machine is 20%. According to the above situation, when the air leakage rate of the air exhauster is reduced by 10%, the power consumption of each ton of sintered ore can be reduced by about 2 degrees for the factory producing the cold sintered ore. At present, the two sides of the sintering machine are sealed in various modes, and the following modes are common:

1) drop-type sealing:

in this sealing device, drop bars are fitted to both ends of a carriage so as to be slidable up and down, and when the carriage is operated, the bottom surfaces of the drop bars come into contact with the edge of the bellows to form a sliding surface, thereby sealing the bellows. The sealing device is unreliable, and especially in a modern sintering machine, the sealing device is further unreliable under the condition that the negative pressure reaches 1200-1450 mm of permanent columns. But the sealing device has simple structure and small maintenance amount.

The T-shaped drop bar sealed by the T-shaped drop bar is made of cast steel, and a slide way made of tool steel is arranged at the edge of the air box. In order to prevent the influence of dust on the falling rod, the sliding plate and the falling rod are made into an inclined type.

2) Grease seal

The sliding plates fixed under both ends of the trolley slide along oil plates fixed on the edges of the bellows when the trolley moves. In order to reduce friction and realize good sealing between the sliding plate and the oil plate, a cross-shaped oil groove with the diameter of 3-5 mm is cut on the oil plate, lubricating grease is pressed into the oil groove by an oil pump and is distributed to the length of the whole oil plate, and the surface of the sliding plate is lubricated by the lubricating grease, so that air is prevented from leaking into the sliding plate, and the purpose of sealing is achieved.

The sealing device is superior to a rod-falling type sealing device in effect, and the structure is simpler. It is not ideal. During the high-temperature sintering process, the viscosity of the lubricating grease is reduced, so that the lubricating grease flows into the bellows, a large amount of dust is adhered to the inner wall of the bellows, the normal production is affected, and the consumption of the lubricating grease is large.

3) Spring seal

In recent years, spring sealing devices have been widely used for sealing between both ends of a sintering machine pallet and an air box. The spring sealing device has long service life, good sealing effect and reliable work. According to different installation modes, the springs are arranged on the air box and the trolley, and the springs are simple in structure and convenient to maintain. However, the former is preferably used for a sintering machine without a tail swing device.

The spring seal is achieved by the action of a spring. The automatic lubricating station supplies lubricating grease to the sealing plate, so that friction is reduced, and sealing performance is enhanced. The spring pressure is selected to be 2-5% of the weight of the trolley, and is generally maintained at 0.05-lkg/cm²The spring pressure is preferably 0.1 to 0.2kg/cm²The low pressure and proper material of the sealing plate and the sliding plate are selected, so that lubricating grease is not needed to be used as an antifriction agent, and graphite and steel sliding plates for the sealing plate are suitable.

The spring seal means, which is spring loaded on the bellows, is one form of spring seal. The cast steel chute is fixed on the edge of the air box. The runner plate, which is made of cast iron, tightly contacts the sealing plate with the slide plate by the action of the vertical spring and the horizontal spring. The sealing plate and the sliding plate are both made of forged steel. In order to obtain a good seal, the sealing plate is adjustable in the vertical direction, and the contact surface between the runner and the floating plate must be precisely machined so that it is in tight contact. The service life of the spring sealing device can reach more than two years, the damaged movable plate, the sealing plate and the spring part are replaced every half year, and oil stains and dust in the sealing device are removed.

The spring seal device of the spring device on the trolley is another form of spring seal. The sliding plates are arranged in a pi-shaped box body at two ends of the trolley, and necessary sealing pressure is exerted by a spring. The pin is used to prevent longitudinal or lateral movement. The pin shafts are generally two and are respectively arranged in springs positioned at two ends. The springs are placed in the recesses of the slide plate and are uniformly distributed along the length of the slide plate, preferably 3-5 springs or more. 90 m: the sintering machine uses 5 springs which are adopted on a trolley with the length lm. The Pi-shaped box body is arranged on a groove of the trolley by a bolt, so that the sealing device is convenient to take out and replace and check. The sealing plate is bolted to the edge of the bellows. The slide plate and the seal plate are both made of forged steel.

4) Plastic plate seal

The plastic plate is made of a material having a low coefficient of friction and being tough and flexible. It is reported abroad to work well at high temperatures above 200 ℃. This temperature is substantially the temperature of the trolley end and the upper part of the bellows. The sealing plate made of the plastic still can keep the mechanical property at the temperature of below 260 ℃, has small friction coefficient and can prevent dust. If modifier such as glass fiber and graphite is added into the resin, the wear resistance of the sealing plate can be improved, and the effect of prolonging the service life of the sealing plate is achieved.

5) Magnetic liquid seal

The magnetic liquid seal is a comprehensive seal, the magnetic liquid seal is a non-contact seal designed by utilizing the property that liquid can be affected by magnetic field force in a magnetic field, the influence of the magnetic field intensity and temperature on the sealing effect is researched on the basis of experiments, and the sealing structure is designed by dynamic simulation of a sintering machine. Due to the complex structure and a plurality of influence factors, no practical application is found at present.

The above 5 kinds of sealing devices are not ideal in sealing effect between sliding plates on two sides of a sintering machine trolley and an air box slideway, or the air leakage rate reaches about 20%, or the sealing devices are not practical. The application provides a brand-new and simple and feasible sealing device between two sides of a sintering machine or a pellet belt type roasting machine trolley and an air box, namely the original sealing between two side sliding plates and a slideway is kept, and a water sealing device is arranged on the outer side of the sealing device, so that the air leakage rate between two sides of the sintering machine trolley and the air box is reduced to be below 5%. That is, the air leakage rate is reduced from 20% to 5% and reduced by 15%, the annual energy saving is 300 × 1.25 × 24x345x2x (15%/10%) =931.5 ten thousand degrees, calculated by a 300 square meter sintering machine, the utilization factor is 1.25t/m2.h, and the operation days is 345 days, and the annual cost can be reduced by 931.5 × 0.6=558.9 ten thousand yuan, calculated by 0.6 yuan/degree electricity.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model designs a sealing device of a belt type sintering and pellet roasting machine.

The utility model adopts the following technical scheme:

a sealing device of belt sintering and pellet roasting machine comprises a water tank, water, a water receiving and leaking hopper, a water collecting tank, a sealing plate and a water pump, wherein the water tank is respectively arranged on air box cross beams on two sides of an air box and is positioned between a track on two sides of a trolley and an air box longitudinal beam, the head end and the tail end of the water tank respectively exceed the outer edge of a head end and tail end sealing device of a sintering machine, the sealing plate is respectively and fixedly connected to the lower parts of two sides of the trolley and corresponds to the position of the water tank, the water is injected into the water tank, the sealing plate fixedly connected to the trolley is inserted into the water in the water tank, the sealing plate moves along with the trolley during production and forms water seal between two sides of the trolley of the sintering machine and the air box, two sides and the bottom of the water tank are sealed, an opening for the sealing plate to move is reserved in the middle of the upper part of the water tank, openings are reserved in the middle of two ends of the water tank and are sealed by sealing rubber, the water receiving and leaking hopper is respectively arranged at the two ends of the water receiving and communicated with the water collecting tank through a pipeline, the water collecting tank is communicated with a water pump, an outlet of the water pump is communicated with the water tank through a pipeline, and leaked water is returned to the water tank.

Preferably, the sealing plates on both sides of each trolley are mutually overlapped.

Preferably, a liquid level meter is arranged in the water tank and is in linkage control with the water pump, so that the liquid level in the water tank is kept constant.

Preferably, the upper part of the water collecting tank is closed and is provided with a water supplementing interface, a water inlet, a water outlet, an air outlet and a sewage outlet, and the water supplementing interface and the water outlet of the water collecting tank are provided with liquid level control valves to ensure the water level balance in the water collecting tank.

Preferably, a slide way seal is arranged between the two sides of the trolley and the air box.

Preferably, the water tank is formed by welding carbon steel.

Preferably, the sealing plate is a carbon steel plate, has a straight plate shape, has a thickness determined according to the length and width, and is welded to the lower portion of the end plate of the trolley.

Preferably, the water receiving hopper is of a rectangular hopper-shaped structure, the upper end of the water receiving hopper is opened and is obliquely arranged, the water receiving hopper is higher by the side of the water tank, the middle of the water receiving hopper is rectangular, the lower part of the water receiving hopper is a cone, and the dust end of the cone is connected with the water drainage pipe.

The utility model has the beneficial effects that: the utility model provides a brand-new and simple and feasible water sealing device between two sides of a sintering machine trolley and an air box, which keeps the original sealing of two side sliding plates and a slideway, and arranges a water sealing device at the outer side of the water sealing device to reduce the air leakage rate between two sides of the sintering machine trolley and the air box to be below 5 percent.

Drawings

FIG. 1 is an intermediate cross-sectional view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a flow chart of water flow control of the water seal device of the present invention;

in the figure: 1. the device comprises a water tank, 2, water, 3, sealing rubber, 4, a water receiving hopper, 5, a water pump, 6, a water collecting tank, 7, a trolley, 8, a sealing plate, 9, a bellows beam, 10, a bellows, 11, a slide seal, 12, a rail, 13, a bellows longitudinal beam, 14, a liquid level meter, 15 and a liquid level control valve.

Detailed Description

The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:

the embodiment is as follows: as shown in fig. 1-3, the water sealing device comprises a water tank 1, water 2, a water tank end sealing rubber 3, a leakage receiving hopper 4, a water collecting tank 6, a sealing plate 8, a water pump 5 and related pipe valves, an electric control system and the like.

The water tanks 1 are respectively arranged on the air box cross beam 9, between the rails 12 on two sides of the trolley 7 and the air box longitudinal beam 13, and the head end and the tail end of the water tanks both exceed the outer edge of the head-tail sealing device of the sintering machine. The end of the water tank 1 is provided with a sealing rubber 3. The sealing plates 8 are fixedly connected to the lower parts of the two sides of the trolley 7, and the sealing plates 8 of each trolley are mutually overlapped. Water 2 is poured into the water tank 1, and a sealing plate 8 fixedly connected to the carriage 7 is inserted into the water 2 in the water tank 1. When the sintering machine is produced, the sealing plate 8 moves along with the trolley 7, and the two sides of the trolley 7 of the sintering machine and the air box 10 are completely sealed by water sealing. And the slide seals 11 between the two sides of the trolley 7 and the bellows 10 are reserved so as to reduce the negative pressure of air draft of the sintering machine. Since the sealing plate 8 fixedly attached to the pallet 7 is inserted into and removed from the water bath 1 every cycle of the sintering pallet 7, water leaks from the front and rear ends of the water bath 1 although the sealing rubber 3 is provided, and the water receiving hopper 4 is provided at the end, and the leaked water is collected in the water collecting tank 6 and then is returned to the water bath 1 by the water pump 5.

The water tank 1 is formed by welding carbon steel, the two sides and the bottom of the water tank are sealed, a hollow groove is reserved at the upper part of the water tank 1, the end of the water tank 1 is reserved with the hollow groove, and the hollow groove is sealed by sealing rubber 3, so that water leakage is reduced as much as possible.

The sealing plate 8 is a carbon steel plate, straight plate shape, thickness according to length and width. Welded to the lower end plate of the trolley 7.

The water receiving funnel 4 is of a rectangular funnel-shaped structure, the upper part of the funnel is inclined and is provided with an opening, and the side close to the water tank 1 is high; the middle part is rectangular, and the lower part is conical, so that the water leaked from the end of the water tank 1 can be received completely and cannot leak outside. The material is carbon steel, and the cone dust end is connected with a drainage pipe.

The upper part of the water collecting tank 6 is of a closed cylinder shape and is provided with a supplementary water interface, a water inlet, a water outlet and a sewage outlet, and the water collecting tank is made of carbon steel. The volume of the water collecting tank 6 needs to meet the requirements of system circulation and water supplement.

The water pumps are inorganic sealing water-cooled horizontal or vertical pumps, and one pump is used and the other pump is standby.

In order to ensure that the liquid level of the water tank 1 is kept constant, liquid level meters 14 are arranged at the water tank 1 on two sides and are controlled in an interlocking way with the water pump 5. To ensure the water level of the water collection tank 6, a level control valve 15 is provided to replenish the water. The pipe valve system is also provided with a water quantity adjusting device to balance the water quantity on two sides.

The utility model provides a brand-new and simple and feasible water sealing device between two sides of a sintering machine trolley and an air box, which keeps the original sealing of two side sliding plates and a slideway, and arranges a water sealing device at the outer side of the water sealing device to reduce the air leakage rate between two sides of the sintering machine trolley and the air box to be below 5 percent.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the utility model as set forth in the claims.

Claims

1. A sealing device of a belt sintering and pellet roasting machine is characterized by comprising a water tank (1), water (2), a water receiving and leaking hopper (4), a water collecting tank (6), sealing plates (8) and a water pump (5), wherein the water tank (1) is respectively arranged on air box cross beams (9) on two sides of an air box (10) and is positioned between rails (15) on two sides of a trolley (7) and an air box longitudinal beam (13), the head end and the tail end of the water tank (1) respectively exceed the outer edge of a head and tail sealing device of a sintering machine, the sealing plates (8) are fixedly connected to the lower parts on two sides of the trolley (7) and correspond to the middle position of the water tank (1), the water (2) is injected into the water tank (1), the sealing plates (8) fixedly connected to the trolley (7) are inserted into the water (2) in the water tank (1), the sealing plates (8) move along with the trolley (7) during production of the sintering machine, and water-tight seals are formed between two sides of the sintering machine trolley (7) and the air box (10), the water tank is characterized in that two sides and the bottom of the water tank (1) are sealed, an opening for the sealing plate to move is reserved in the middle of the upper portion of the water tank (1), openings are reserved at two ends of the water tank (1) respectively and are sealed by sealing rubber (3), water receiving hoppers (4) are arranged at two ends of the water tank (1) respectively, the bottoms of the water receiving hoppers (4) are communicated with a water collecting tank (6) through pipelines, the water collecting tank (6) is connected with a water pump (5), and water discharged from the water pump (5) is communicated with the interior of the water tank (1) through the pipelines to return to the water tank (1) to be leaked.

2. The sealing device for belt sintering and pellet roasting machines as claimed in claim 1, wherein the sealing plates (8) on both sides of each trolley (7) are overlapped with each other.

3. The sealing device for belt sintering and pellet roasting machines as claimed in claim 1, wherein a liquid level meter (14) is arranged in the water tank (1) and is interlocked with the water pump (5) to ensure that the liquid level in the water tank (1) is kept constant.

4. The sealing device for belt sintering and pellet roasting machines as claimed in claim 1, wherein the upper part of the water collection tank (6) is closed and is provided with a water supply port, a water inlet, a water outlet, an air outlet and a sewage outlet, and the water supply port and the water outlet of the water collection tank (6) are provided with liquid level control valves to ensure the water level balance in the water collection tank (6).

5. The sealing device for belt sintering and pellet roasting machines as claimed in claim 1, wherein a slide seal (11) is provided between both sides of the trolley (7) and the bellows.

6. The sealing device for belt sintering and pellet roasting machines as claimed in claim 1, wherein the water tank (1) is welded by carbon steel.

7. The sealing device for belt sintering and pellet firing machines as claimed in claim 1, wherein said sealing plate (8) is made of carbon steel plate, straight plate shape, thickness depending on length and width, welded to the lower part of the end plate of the trolley (7).

8. The sealing device for belt sintering and pellet roasting machines as claimed in claim 1, wherein the water receiving hopper (4) is a rectangular hopper-shaped structure with an open upper end and an inclined arrangement, the side of the water receiving tank (1) is high, the middle is rectangular, the lower part is conical, and the dust end of the cone is connected with a water discharge pipe.