CN116379725A - A high-moisture lignite pre-drying equipment integrated in a thermal power plant - Google Patents

Abstract

The invention provides a high-moisture lignite pre-drying equipment integrated in a thermal power plant, which includes a rotary mechanism equipped with a reducer, and a discharge bin that is movable and fitted outside one end of the rotary mechanism. The high-moisture lignite pre-drying equipment integrated in the thermal power plant sets baffles on both sides of the scraper, so that when the scraper rolls the high-moisture lignite located in the inner lower half of the inner drum, the baffles set can Prevent high-moisture lignite from flowing to both sides of the scraper, and then the scraper can transfer more high-moisture lignite to a higher position for sliding, thereby avoiding excessive accumulation of high-moisture lignite in the lower half of the inner drum, making The high-moisture lignite can be in full contact with the steam to improve the drying effect of the device on the high-moisture lignite, and the baffle plate can be inclined at a certain angle to reduce the resistance to the high-moisture lignite, so that the high-moisture lignite located in the lower half of the inner drum can be normally dried. The flow is carried out with the rotation of the inner drum.

Description

A high-moisture lignite pre-drying equipment integrated in a thermal power plant

technical field

The invention relates to the technical field of lignite pre-drying, and specifically discloses high-moisture lignite pre-drying equipment integrated in a thermal power plant.

Background technique

Lignite is a kind of mineral coal with a relatively low degree of coalification. It is not easy to transport long-distance, difficult to store, easy to be elegant and prone to chemical reactions. It is mainly suitable for the chemical industry and power plant combustion. Long-term storage in coal mines is prone to spontaneous combustion. Usually, water spraying and humidity control are used to prevent spontaneous combustion. However, when the lignite after water spraying is burned in the boiler, on the one hand, it will increase the flue gas in the boiler and increase the heat loss. Efficiency decreases. On the other hand, lignite with moisture will increase the output of the induced draft fan and the pulverizing system of the power generation system, which will increase the electricity consumption of the power plant. Therefore, the use of lignite pre-drying technology in the power station is very important for enhancing the overall economic benefits of the power station. important role.

When using a steam rotary drying device to dry high-moisture lignite, first the high-moisture lignite from the coal hopper is transported to the hopper through the belt conveyor, and the high-moisture lignite is transported to the drum through the screw feeder in the hopper At this time, under the drive of the blower, the steam generated by the heat source is introduced into the drum from the discharge end of the drum, and the high-moisture lignite is fully contacted with the steam through the rotation of the drum, and then the moisture in the high-moisture lignite is continuously evaporated to achieve For the drying of high-moisture lignite, when the airflow in the drum flows to the discharge end, it is sequentially introduced into the cyclone separator and dust collector through the exhaust pipe to treat the moisture and dust particles contained in the airflow, and the treated airflow is discharged from the induced draft fan. discharge.

When the existing steam rotary drying device uses steam to dry the high-moisture lignite in the drum, during the process of the steam flowing with the airflow, part of the steam will be directly discharged from the upper half of the inner side of the drum along with the airflow. , this will lead to waste of steam, and the effective use of steam resources cannot be realized. At the same time, due to the large inner diameter of the drum, during the process of rolling the high-moisture lignite by the drum, the high-moisture lignite is located in the lower half of the inner side of the drum. , so the device cannot effectively tumble the high-moisture lignite, so that the drying effect of the device on the high-moisture lignite is not good.

Contents of the invention

In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a high-moisture lignite pre-drying equipment integrated in a thermal power plant, including a rotary mechanism equipped with a reducer, and a discharge material that is movable on the outside of one end of the rotary mechanism. The silo, the movable set on the outer side of the other end of the slewing mechanism, the heat source connected to the side of the output silo, the discharge port at the bottom of the output silo, the hopper set on the side of the input silo, and the inside of the hopper And the screw feeder connected to one side of the feeding bin and the exhaust pipe arranged on the top of the feeding bin, the inside of the rotary mechanism is provided with a plurality of scrapers and flow guiding mechanisms for dislocation distribution.

Preferably, the slewing mechanism includes an outer drum set on the inside of the discharge bin and the feed bin, the inner side of the outer drum is fixedly sleeved with an inner drum through ring-shaped equidistantly distributed support bosses, and the outer drum and the inner drum The space is filled with a thermal insulation layer located on the outside of the supporting boss.

Preferably, intervals are distributed between the scraper and the flow guiding mechanism.

Preferably, both sides of the scraper are provided with baffles, and the baffles and the scraper are inclined at a certain angle.

Preferably, the flow guide mechanisms are arranged in a group of six to be equidistantly distributed in a ring, and each group is distributed in a misplaced manner.

Preferably, the deflector mechanism includes a support plate arranged inside the inner drum, the top of the support plate is rotatably connected with a deflector through a fixed pin, and one side of the bottom of the deflector is provided with a The lower limit rod on the side, and one side of the top of the deflector is provided with an upper limit rod on one side of the support plate.

Preferably, the bottom surface of the deflector is set as a symmetrically distributed slope.

Preferably, an air blower with adjustable wind speed is arranged inside the heat source, and the steam generated by the heat source contains less oxygen.

Beneficial effect

1. The high-moisture lignite pre-drying equipment integrated in the thermal power plant, through the cooperation of the support plate, the fixed pin, the lower limit rod and the upper limit rod, makes the deflector located at the upper half of the inner drum under its own gravity. Under the action, it can rotate around the fixed pin. At this time, when the steam flows to the upper half of the inner drum with the air flow, the upper limit rod can block the air flow and slow down the flow speed of the air flow, so that the steam stays inside the inner drum. The time is longer, and the steam can effectively heat the high-moisture lignite, and the deflector can be tilted at a certain angle under the limit support of the upper limit rod, and the steam can be guided through the deflector during the flow process. Make it flow to the lower half of the inner drum and at the same time contact the high-moisture lignite located in the lower half of the inner drum to reduce the loss of steam and realize the effective use of steam resources.

2. The high-moisture lignite pre-drying equipment integrated in the thermal power plant sets baffles on both sides of the scraper so that when the scraper rolls the high-moisture lignite located in the inner lower half of the inner drum, the baffles set The plate can block the flow of high-moisture lignite to both sides of the scraper, and then the scraper can transfer more high-moisture lignite to a higher position for sliding down, thereby avoiding excessive accumulation of high-moisture lignite in the lower half of the inner drum , so that the high-moisture lignite can fully contact with the steam, improve the drying effect of the device on the high-moisture lignite, and the baffle is inclined at a certain angle to reduce the resistance to the high-moisture lignite, so that the high-moisture lignite located in the lower half of the inner drum can be normal The flow flows with the rotation of the inner drum.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the cross-sectional view of the rotary mechanism of the present invention;

Fig. 3 is a side sectional view of the rotary mechanism of the present invention;

Fig. 4 is a schematic cross-sectional view of a scraper of the present invention;

Fig. 5 is a schematic diagram of side distribution of the diversion mechanism of the present invention;

Fig. 6 is a schematic diagram of the diversion mechanism of the present invention;

Fig. 7 is a partial schematic side view of the flow guiding mechanism of the present invention.

In the figure: 1, rotary mechanism; 1-1, outer drum; 1-2, support boss; 1-3, inner drum; 1-4, heat insulation layer; 2, discharge bin; 3, feed bin ;4, heat source; 5, discharge port; 6, hopper; 7, screw feeder; 8, exhaust pipe; 9, scraper; 10, diversion mechanism; 101, support plate; 102, fixed pin; 103 , deflector; 104, lower limit rod; 105, upper limit rod; 11, baffle plate; 12, inclined plane.

Implementation

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, not to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

The drawings in the embodiments of the present invention: the different types of section lines in the drawings are not marked according to the national standard, and there is no requirement for the material of the components, but to distinguish the cross-sectional views of the components in the drawings.

Please refer to Figure 1-7, a high-moisture lignite pre-drying equipment integrated in a thermal power plant, including a rotary mechanism 1 equipped with a reducer, a discharge bin 2 with a movable sleeve on the outside of one end of the rotary mechanism 1, and a movable sleeve on the rotary The feed bin 3 outside the other end of the mechanism 1, the heat source 4 connected to one side of the discharge bin 2, the discharge port 5 arranged at the bottom of the discharge bin 2, the hopper 6 arranged on the side of the feed bin 3 and the The screw feeder 7 inside the hopper 6 and connected to one side of the feed bin 3 and the exhaust pipe 8 arranged on the top of the feed bin 3 can use the exhaust pipe 8 to sequentially introduce the internal airflow of the inner drum 1-3 The cyclone separator and dust collector filter the moisture and dust particles contained in the airflow, and the treated airflow is discharged from the induced draft fan, thereby ensuring that the steam airflow can circulate smoothly inside the inner drum 1-3, so that the The moisture-containing balloon is discharged outward together with the solid exhaust pipe 8, and the inner side of the rotary mechanism 1 is provided with a plurality of scrapers 9 and a flow guide mechanism 10 for dislocation distribution.

Among them, the slewing mechanism 1 includes an outer drum 1-1 set inside the discharge bin 2 and the feed bin 3, and the inner side of the outer drum 1-1 is fixedly fitted with an inner drum 1 through ring-shaped equidistantly distributed support bosses 1-2. -3, use the support boss 1-2 to isolate the outer drum 1-1 and the inner drum 1-3, avoid direct contact between the two, so that the heat of the inner drum 1-3 is not easy to flow out of the outer drum 1-1 For conduction loss, the outer drum 1-1 and the inner drum 1-3 are filled with a thermal insulation layer 1-4 located on the outside of the support boss 1-2, and the inner drum 1-4 can be controlled by the thermal insulation layer 1-4. 3 to protect and reduce the loss of its heat, and then ensure that the inner side of the inner drum 1-3 has a higher temperature, which is easy to evaporate the moisture in the high-moisture lignite.

Wherein, the scraper 9 and the guide mechanism 10 are distributed at intervals, and the resistance to the high-moisture lignite located on the inner side of the inner drum 1-3 can be reduced by adopting the interval distribution of the scraper 9 and the guide mechanism 10, which is convenient for high-moisture Lignite flows in the lower half of the inner drum 1-3, and at the same time, it can be ensured that each small section inside the inner drum 1-3 is equipped with a scraper 9 and a flow guide mechanism 10, and then each small section of the inner drum 1-3 Both can roll the high-moisture lignite through the scraper 9 and guide the steam flow through the guide mechanism 10 .

Wherein, both sides of the scraper 9 are provided with baffles 11, and the baffles 11 and the scraper 9 are inclined at a certain angle.

Among them, the flow guiding mechanism 10 is arranged in a group of six at equal intervals in a ring, and each group is distributed in a misplaced manner. The six flow guiding mechanisms 10 are used to make the inner drum 1-3 rotate, and its upper half There is always a guide mechanism 10 to guide the steam flow.

Wherein, the deflector mechanism 10 includes a support plate 101 arranged inside the inner drum 1-3, the inside of the top of the support plate 101 is connected with a deflector 103 through a fixed pin 102, and one side of the bottom of the deflector 103 is provided with a The lower limit rod 104 on one side of the plate 101 , and the upper limit rod 105 on the side of the support plate 101 is provided on one side of the top of the deflector 103 .

Wherein, the bottom surface of the deflector 103 is set as a symmetrically distributed slope 12, and the resistance between the high-moisture lignite and the high-moisture lignite can be reduced by using the slope 12. Press down and tilt, and the high-moisture lignite can also flow along the slope 12.

Wherein, the inside of the heat source 4 is provided with a blower with adjustable wind speed, and the oxygen-free steam generated by the heat source 4 can be transported to the inner side of the inner drum 1-3 by the blower, and then the high-moisture lignite is heated by the steam to make the moisture in the inside Evaporation, and the steam generated by the heat source 4 has less oxygen content, so as to ensure that the high-moisture lignite will not spontaneously ignite due to heating during the drying process of the high-moisture lignite, so as to protect the dried lignite.

When the drying equipment is working, the high-moisture lignite from the coal hopper is transported to the hopper 6 through the belt conveyor, and the high-moisture lignite is transported to the inner drum 1-3 by the screw feeder 7 in the hopper 6 At this time, under the drive of the blower, the steam generated by the heat source 4 is introduced into the inner drum 1-3 from the discharge bin 2 of the rotary mechanism 1, and the high-moisture lignite is continuously removed by the scraper 9 through the rotation of the inner drum 1-3. Stir and tumble. At this time, when the steam flows to the upper half along the inner side of the inner drum 1-3 with the air flow, the upper limit rod 105 can block and guide the air flow, slow down the flow speed of the air flow, and make it flow toward the inner drum 1-3. The lower half of the inner drum flows, so that the steam can fully contact the high-moisture lignite inside the inner drum 1-3, and then the steam can effectively heat the high-moisture lignite, continuously evaporate the moisture in the high-moisture lignite, and realize the high-moisture lignite When the airflow in the drum flows to the feed bin 3, it is introduced into the cyclone separator and dust collector in turn through the exhaust pipe 8 to process the moisture and dust particles contained in the airflow, and the treated airflow is discharged from the induced draft fan. Simultaneously, the dried lignite is gradually transported into the discharge bin 2 under the rotation of the rotary mechanism 1, and is discharged outward through the discharge port 5. The content not described in detail in this description belongs to the existing knowledge known to those skilled in the art. have technology.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

The above description is only a preferred embodiment of the present application and an illustration of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but should also cover the technical solution formed by the above-mentioned technical features without departing from the inventive concept. Other technical solutions formed by any combination of or equivalent features thereof. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (8)

1. A high-moisture lignite pre-drying equipment integrated in a thermal power plant, including a slewing mechanism (1) equipped with a reducer, a discharge bin (2) set outside one end of the slewing mechanism (1), and a slewing mechanism (1) The feed bin (3) on the outside of the other end, the heat source (4) connected to the side of the discharge bin (2), the discharge port (5) set at the bottom of the discharge bin (2), and the The hopper (6) on one side of the hopper (3) and the screw feeder (7) arranged inside the hopper (6) and connected to one side of the feed silo (3) The exhaust pipe (8) at the top is characterized in that: the inside of the rotary mechanism (1) is provided with a plurality of scrapers (9) and flow guide mechanisms (10) in dislocation distribution. 2. A high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 1, characterized in that: the slewing mechanism (1) includes a set in the discharge bin (2) and the feed bin (3 ) on the inner side of the outer roller (1-1), the inner side of the outer roller (1-1) is set with the inner roller (1-3) through the support bosses (1-2) distributed equidistantly in the ring, the outer roller (1-3) (1-1) and the inner drum (1-3) are filled with a thermal insulation layer (1-4) located outside the support boss (1-2). 3. The high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 1, characterized in that: the scraper (9) and the diversion mechanism (10) are spaced apart. 4. The high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 1, characterized in that: both sides of the scraper (9) are provided with baffles (11), and the baffles Incline a certain angle between (11) and scraper (9). 5. The high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 1, characterized in that: the diversion mechanism (10) is arranged in a group of six for circular equidistant distribution, and each Dislocation distribution was performed between groups. 6. The high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 1, characterized in that: the flow guide mechanism (10) includes a support plate arranged inside the inner drum (1-3) (101), the inside of the top of the support plate (101) is rotatably connected with a deflector (103) through a fixed pin (102), and one side of the bottom of the deflector (103) is provided with a A lower limit rod (104) on one side, and an upper limit rod (105) on one side of the support plate (101) is provided on one side of the top of the deflector (103). 7. The high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 6, characterized in that: the bottom surface of the deflector (103) is set as a symmetrically distributed slope (12). 8. The high-moisture lignite pre-drying equipment integrated in a thermal power plant according to claim 1, characterized in that: the inside of the heat source (4) is provided with an air blower with adjustable wind speed, and the heat source (4) only Raw steam contains less oxygen.

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